Merge pull request #2 from iot-lab/pr/er-coap-dtls/tinydtls_and_er_coap_integration

Pr/er coap dtls/tinydtls and er coap integration

.gitmodules

@@ -4,16 +4,15 @@
 [submodule "tools/cc2538-bsl"]
 	path = tools/cc2538-bsl
 	url = https://github.com/JelmerT/cc2538-bsl.git
-[submodule "cpu/cc26xx-cc13xx/lib/cc26xxware"]
-	path = cpu/cc26xx-cc13xx/lib/cc26xxware
-	url = https://github.com/contiki-os/cc26xxware.git
 [submodule "cpu/cc26xx-cc13xx/lib/cc13xxware"]
 	path = cpu/cc26xx-cc13xx/lib/cc13xxware
 	url = https://github.com/contiki-os/cc13xxware.git
 [submodule "platform/stm32nucleo-spirit1/stm32cube-lib"]
 	path = platform/stm32nucleo-spirit1/stm32cube-lib
 	url = https://github.com/STclab/stm32nucleo-spirit1-lib
-
 [submodule "tools/sensniff"]
 	path = tools/sensniff
 	url = https://github.com/g-oikonomou/sensniff.git
+[submodule "apps/tinydtls"]
+	path = apps/tinydtls
+	url = https://github.com/iot-lab/armour-tinydtls.git

LICENSE

@@ -1,3 +1,37 @@
+A note on Licensing (2017-03-17):
+Github has recently (2017-03-01) changed their license terms:
+https://help.github.com/articles/github-terms-of-service/
+There were comments that this may violate some GPL and creative commons
+licenses:
+http://joeyh.name/blog/entry/removing_everything_from_github/
+https://www.mirbsd.org/permalinks/wlog-10_e20170301-tg.htm
+But also voices that don't see a problem:
+https://www.earth.li/~noodles/blog/2017/03/github-tos-change.html
+If your're german-speaking you may also want to read the two Heise
+articles:
+https://www.heise.de/developer/meldung/GitHub-eckt-mit-neuen-Nutzungsbedingungen-an-3647980.html
+https://www.heise.de/developer/meldung/FSF-aeussert-sich-zu-den-GitHub-Nutzungsbedingungen-3657040.html
+
+We trust that the problematic part in section D.5:
+"If you set your pages and repositories to be viewed publicly, you grant
+each User of GitHub a nonexclusive, worldwide license to access your
+Content through the GitHub Service, and to use, display and perform your
+Content, and to reproduce your Content solely on GitHub as permitted
+through GitHub's functionality." that the part "solely on GitHub as
+permitted through GitHub's functionality" also applies to "display and
+perform your Content". If the latter part of the sentence would stand
+alone it could be interpreted that we would grant *everybody*
+essentially an unlimited license (which we cannot because the authors
+from whom we forked applied other licenses). This interpretation is
+further supported by the fact that Github writes "You may grant further
+rights if you adopt a license." that in fact the statements above only
+apply to the rendering on Github.
+
+Note that in the following we have two licenses, the 3-clause BSD and
+the LGPL license in short:
+- Contiki OS (and our modification to it) are 3-clause BSD
+- Our Arduino compatibility Layer on top of Contiki OS is LGPL
+
 Contiki is licensed under the 3-clause BSD license. This license gives
 everyone the right to use and distribute the code, either in binary or
 source code format, as long as the copyright license is retained in
@@ -36,3 +70,463 @@ of license. The license text is:
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  * OF THE POSSIBILITY OF SUCH DAMAGE.
 
+Arduino-compatibility layer if not otherwise noted is under the
+following license:
+
+		  GNU LESSER GENERAL PUBLIC LICENSE
+		       Version 2.1, February 1999
+
+ Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+ 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+[This is the first released version of the Lesser GPL.  It also counts
+ as the successor of the GNU Library Public License, version 2, hence
+ the version number 2.1.]
+
+			    Preamble
+
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+
+  This license, the Lesser General Public License, applies to some
+specially designated software packages--typically libraries--of the
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+can use it too, but we suggest you first think carefully about whether
+this license or the ordinary General Public License is the better
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+
+  When we speak of free software, we are referring to freedom of use,
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Makefile.include

@@ -105,7 +105,7 @@ CONTIKI_SOURCEFILES += $(CONTIKIFILES)
 CONTIKIDIRS += ${addprefix $(CONTIKI)/core/,dev lib net net/llsec net/mac net/rime \
                  net/rpl sys cfs ctk lib/ctk loader . }
 
-oname = ${patsubst %.c,%.o,${patsubst %.S,%.o,$(1)}}
+oname = ${patsubst %.cpp,%.o,${patsubst %.c,%.o,${patsubst %.S,%.o,$(1)}}}
 
 CONTIKI_OBJECTFILES = ${addprefix $(OBJECTDIR)/,${call oname, $(CONTIKI_SOURCEFILES)}}
 
@@ -156,16 +156,18 @@ endif
 ### Verbosity control. Use  make V=1  to get verbose builds.
 
 ifeq ($(V),1)
-  TRACE_CC =
+  TRACE_CC  =
-  TRACE_LD =
+  TRACE_CXX =
-  TRACE_AR =
+  TRACE_LD  =
-  TRACE_AS =
+  TRACE_AR  =
+  TRACE_AS  =
   Q=
 else
-  TRACE_CC = @echo "  CC       " $<
+  TRACE_CC  = @echo "  CC       " $<
-  TRACE_LD = @echo "  LD       " $@
+  TRACE_CXX = @echo "  CXX      " $<
-  TRACE_AR = @echo "  AR       " $@
+  TRACE_LD  = @echo "  LD       " $@
-  TRACE_AS = @echo "  AS       " $<
+  TRACE_AR  = @echo "  AR       " $@
+  TRACE_AS  = @echo "  AS       " $<
   Q=@
 endif
 
@@ -184,8 +186,9 @@ CONTIKI_CPU_DIRS_CONCAT    = ${addprefix $(CONTIKI_CPU)/, \
 SOURCEDIRS = . $(PROJECTDIRS) $(CONTIKI_TARGET_DIRS_CONCAT) \
              $(CONTIKI_CPU_DIRS_CONCAT) $(CONTIKIDIRS) $(APPDS) $(EXTERNALDIRS) ${dir $(target_makefile)}
 
-vpath %.c $(SOURCEDIRS)
+vpath %.c   $(SOURCEDIRS)
-vpath %.S $(SOURCEDIRS)
+vpath %.cpp $(SOURCEDIRS)
+vpath %.S   $(SOURCEDIRS)
 
 CFLAGS += ${addprefix -I,$(SOURCEDIRS) $(CONTIKI)}
 
@@ -203,7 +206,7 @@ endif
 
 ifneq ($(MAKECMDGOALS),clean)
 -include ${addprefix $(OBJECTDIR)/,$(CONTIKI_SOURCEFILES:.c=.d) \
-                                   $(PROJECT_SOURCEFILES:.c=.d)}
+                                   $(PROJECT_OBJECTFILES:.o=.d)}
 endif
 
 ### See http://make.paulandlesley.org/autodep.html#advanced
@@ -242,6 +245,13 @@ $(OBJECTDIR)/%.o: %.c | $(OBJECTDIR)
 	@$(FINALIZE_DEPENDENCY)
 endif
 
+ifndef CUSTOM_RULE_CPP_TO_OBJECTDIR_O
+$(OBJECTDIR)/%.o: %.cpp | $(OBJECTDIR)
+	$(TRACE_CXX)
+	$(Q)$(CXX) $(CFLAGS) -MMD -c $< -o $@
+	@$(FINALIZE_DEPENDENCY)
+endif
+
 ifndef CUSTOM_RULE_S_TO_OBJECTDIR_O
 $(OBJECTDIR)/%.o: %.S | $(OBJECTDIR)
 	$(TRACE_AS)
@@ -254,6 +264,12 @@ ifndef CUSTOM_RULE_C_TO_O
 	$(Q)$(CC) $(CFLAGS) -c $< -o $@
 endif
 
+ifndef CUSTOM_RULE_CPP_TO_O
+%.o: %.cpp
+	$(TRACE_CXX)
+	$(Q)$(CXX) $(CFLAGS) -c $< -o $@
+endif
+
 
 ifndef CUSTOM_RULE_C_TO_CO
 %.co: %.c
@@ -288,6 +304,25 @@ endif
 %.flashprof: %.$(TARGET)
 	$(NM) -S -td --size-sort $< | grep -i " [t] " | cut -d' ' -f2,4
 
+viewconf:
+	@echo "----------------- Make variables: --------------"
+	@echo "##### \"TARGET\": ________________________________ $(TARGET)"
+	@echo "##### \"BOARD\": _________________________________ $(BOARD)"
+	@echo "##### \"MAKE_MAC\": ______________________________ $(MAKE_MAC)"
+	@echo "##### \"MAKE_NET\": ______________________________ $(MAKE_NET)"
+	@echo "##### \"MAKE_ROUTING\": __________________________ $(MAKE_ROUTING)"
+ifdef MAKE_COAP_DTLS_KEYSTORE
+	@echo "##### \"MAKE_COAP_DTLS_KEYSTORE\": _______________ $(MAKE_COAP_DTLS_KEYSTORE)"
+endif
+	@echo "----------------- C variables: -----------------"
+	$(Q)$(CC) $(CFLAGS) -E $(CONTIKI)/tools/viewconf.c | grep \#\#\#\#\#
+	@echo "------------------------------------------------"
+	@echo "'==' Means the flag is set to a given a value"
+	@echo "'->' Means the flag is unset, but will default to a given value"
+	@echo "'><' Means the flag is unset and has no default value"
+	@echo "To view more Make variables, edit $(CONTIKI)/Makefile.include, rule 'viewconf'"
+	@echo "To view more C variables, edit $(CONTIKI)/tools/viewconf.c"
+	
 # Don't treat %.$(TARGET) as an intermediate file because it is
 # in fact the primary target.
 .PRECIOUS: %.$(TARGET)
@@ -297,6 +332,8 @@ endif
 # the match-anything rule below instead.
 %: %.c
 
+%: %.cpp
+
 # Match-anything pattern rule to allow the project makefiles to
 # abstract from the actual binary name. It needs to contain some
 # command in order to be a rule, not just a prerequisite.

README.md

@@ -1,8 +1,6 @@
 The Contiki Operating System
 ============================
 
-[![Build Status](https://travis-ci.org/contiki-os/contiki.svg?branch=master)](https://travis-ci.org/contiki-os/contiki/branches)
-
 Contiki is an open source operating system that runs on tiny low-power
 microcontrollers and makes it possible to develop applications that
 make efficient use of the hardware while providing standardized
@@ -17,3 +15,12 @@ and so on.
 For more information, see the Contiki website:
 
 [http://contiki-os.org](http://contiki-os.org)
+
+This fork of the Contiki Operating System adds support for our Merkur
+Board, adds a lot of examples (with different hardware) and puts an
+Arduino compatibility layer on top of Contiki-OS that allows Arduino
+Sketches -- and a lot of drivers for Arduino compatible hardware -- to
+run under Contiki-OS.
+
+For the licensing terms (also in the light of recent debates of Github
+changed Terms of Service on 2017-03-01) see the file LICENSE.

apps/arduino/Makefile.arduino

@@ -0,0 +1,2 @@
+arduino_src = arduino-process.c
+

apps/arduino/Makefile.include

@@ -0,0 +1,4 @@
+%.cpp: %.pde
+	echo '#include "Arduino.h"'                                > $@
+	echo '#include "$<"'                                      >> $@
+

apps/arduino/README.md

@@ -0,0 +1,13 @@
+Arduino Compatibility
+=====================
+
+This application contains hardware-independent implementations of
+arduino compatibilty libraries and include files to be used with
+contiki.
+
+The whole arduino compatibility library is work in progress. Note that
+features having to do with timers like `millis` and `delay` are
+currently untested. In Arduino they use timer 0 of the AVR
+microcontroller. It should be investigated to use the hardware timer
+already in use by contiki (on the OSD-merkur platform this is currently
+timer 5).

apps/arduino/arduino-process.c

@@ -0,0 +1,183 @@
+/*
+ * Copyright (c) 2014, Ralf Schlatterbeck Open Source Consulting
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * This file is part of the Contiki operating system.
+ */
+
+/**
+ * \addgroup Arduino Process
+ *
+ * This wraps the Arduino-API entry points `loop` and `setup` in a
+ * contiki process.
+ *
+ * If the normal contiki includes are used and resources initialized in
+ * `setup`, Contiki resources can be used in an arduino sketch.
+ *
+ * @{
+ */
+
+/**
+ * \file
+ *        Wrapper for Arduino sketches
+ * \author
+ *        Ralf Schlatterbeck <rsc@runtux.com>
+ *
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include "arduino-process.h"
+#include "hw_timer.h"
+#include "adc.h"
+#include "hw-arduino.h"
+#include "contiki.h"
+#include "project-conf.h"
+
+
+#define DEBUG 0
+#if DEBUG
+#include <stdio.h>
+#define PRINTF(...) printf(__VA_ARGS__)
+#define PRINT6ADDR(addr) PRINTF("[%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x:%02x%02x]", ((uint8_t *)addr)[0], ((uint8_t *)addr)[1], ((uint8_t *)addr)[2], ((uint8_t *)addr)[3], ((uint8_t *)addr)[4], ((uint8_t *)addr)[5], ((uint8_t *)addr)[6], ((uint8_t *)addr)[7], ((uint8_t *)addr)[8], ((uint8_t *)addr)[9], ((uint8_t *)addr)[10], ((uint8_t *)addr)[11], ((uint8_t *)addr)[12], ((uint8_t *)addr)[13], ((uint8_t *)addr)[14], ((uint8_t *)addr)[15])
+#define PRINTLLADDR(lladdr) PRINTF("[%02x:%02x:%02x:%02x:%02x:%02x]", (lladdr)->addr[0], (lladdr)->addr[1], (lladdr)->addr[2], (lladdr)->addr[3], (lladdr)->addr[4], (lladdr)->addr[5])
+#else
+#define PRINTF(...)
+#define PRINT6ADDR(addr)
+#define PRINTLLADDR(addr)
+#endif
+
+
+extern volatile uint8_t mcusleepcycle;
+#if PLATFORM_HAS_BUTTON
+#include "rest-engine.h"
+#include "dev/button-sensor.h"
+extern resource_t res_event, res_separate;
+#endif /* PLATFORM_HAS_BUTTON */
+
+volatile uint8_t mcusleepcycleval;
+/* 0 dont sleep; 1 sleep */
+uint8_t mcusleep;
+
+/*-------------- enabled sleep mode ----------------------------------------*/
+void
+mcu_sleep_init(void)
+{
+	mcusleepcycleval=mcusleepcycle;
+    mcu_sleep_disable(); // if a shell is active we can type 
+}
+void
+mcu_sleep_disable(void)
+{
+	mcusleep=2;
+    mcu_sleep_off();
+}
+void
+mcu_sleep_enable(void)
+{
+	mcusleep=0;
+}
+void
+mcu_sleep_on(void)
+{
+	if(mcusleep == 0){
+		mcusleepcycle= mcusleepcycleval;
+	}
+}
+/*--------------- disable sleep mode ---------------------------------------*/
+void
+mcu_sleep_off(void)
+{
+		mcusleepcycle=0;
+}
+/*---------------- set duty cycle value ------------------------------------*/
+void
+mcu_sleep_set(uint8_t value)
+{
+	mcusleepcycleval= value;
+//	mcusleepcycle = mcusleepcycleval;
+}
+
+PROCESS(arduino_sketch, "Arduino Sketch Wrapper");
+
+#ifndef LOOP_INTERVAL
+#define LOOP_INTERVAL		(1 * CLOCK_SECOND)
+#endif
+#define START_MCUSLEEP		(10 * CLOCK_SECOND)
+
+PROCESS_THREAD(arduino_sketch, ev, data)
+{
+  static struct etimer loop_periodic_timer;
+  static struct etimer start_mcusleep_timer;
+
+  PROCESS_BEGIN();
+  adc_init ();
+  mcu_sleep_init ();
+  setup ();
+  /* Define application-specific events here. */
+  etimer_set(&loop_periodic_timer, LOOP_INTERVAL);
+  etimer_set(&start_mcusleep_timer, START_MCUSLEEP);
+
+  while (1) {
+	PROCESS_WAIT_EVENT();
+#if PLATFORM_HAS_BUTTON
+    if(ev == sensors_event && data == &button_sensor) {
+      mcu_sleep_off();
+      PRINTF("*******BUTTON*******\n");
+      button ();
+      mcu_sleep_on();
+    }
+#endif /* PLATFORM_HAS_BUTTON */
+    if(etimer_expired(&start_mcusleep_timer)) {
+      PRINTF("mcusleep_timer %d\n",mcusleep);
+      if(mcusleep == 1){
+        PRINTF("mcu sleep on\n");
+        mcu_sleep_enable();
+        mcu_sleep_on();
+      }
+      if (mcusleep > 0) {
+		mcusleep--;
+      }
+      etimer_reset(&start_mcusleep_timer);
+    }
+
+    if(etimer_expired(&loop_periodic_timer)) {
+      mcu_sleep_off();
+      loop ();
+      mcu_sleep_on();
+      etimer_reset(&loop_periodic_timer);
+    }
+  }
+  PROCESS_END();
+}
+
+/*
+ * VI settings, see coding style
+ * ex:ts=8:et:sw=2
+ */
+
+/** @} */

apps/arduino/arduino-process.h

@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2014, Ralf Schlatterbeck Open Source Consulting
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * This file is part of the Contiki operating system.
+ */
+
+/**
+ * \devgroup Arduino Process
+ *
+ * This wraps the Arduino-API entry points `loop` and `setup` in a
+ * contiki process.
+ *
+ * If the normal contiki includes are used and resources initialized in
+ * `setup`, Contiki resources can be used in an arduino sketch.
+ *
+ * @{
+ */
+
+/**
+ * \file
+ *        Wrapper for Arduino sketches
+ * \author
+ *        Ralf Schlatterbeck <rsc@runtux.com>
+ *
+ */
+
+#include "contiki.h"
+
+/*--------------- enable sleep mode ---------------------------------------*/
+void mcu_sleep_enable(void);
+/*--------------- disable sleep mode ---------------------------------------*/
+void mcu_sleep_disable(void);
+/*--------------- sleep mode on---------------------------------------*/
+void mcu_sleep_on(void);
+/*--------------- sleep mode off---------------------------------------*/
+void mcu_sleep_off(void);
+/*---------------- set sleep value ------------------------------------*/
+void mcu_sleep_set(uint8_t value);
+
+extern void loop         (void);
+extern void setup        (void);
+extern void arduino_init (void);
+extern void button       (void);
+
+extern struct process arduino_sketch;
+
+/*
+ * VI settings, see coding style
+ * ex:ts=8:et:sw=2
+ */
+
+/** @} */

apps/er-coap/Makefile.er-coap

@@ -4,3 +4,18 @@ er-coap_src = er-coap.c er-coap-engine.c er-coap-transactions.c      \
 
 # Erbium will implement the REST Engine
 CFLAGS += -DREST=coap_rest_implementation
+
+ifeq ($(WITH_DTLS_COAP),1)
+er-coap_src += er-coap-dtls.c
+
+# Load tinydtls
+APPS += tinydtls
+$(CONTIKI)/apps/tinydtls/Makefile.tinydtls:
+	@echo "    You should run 'git submodule update --init' to clone 'app/tinydtls'"
+	@exit 1
+include $(CONTIKI)/apps/tinydtls/Makefile.tinydtls
+PROJECTDIRS+=$(CONTIKI)/apps/tinydtls/aes $(CONTIKI)/apps/tinydtls/sha2 $(CONTIKI)/apps/tinydtls/ecc
+
+else
+er-coap_src += er-coap-udp.c
+endif

apps/er-coap/er-coap-communication.h

@@ -0,0 +1,15 @@
+#ifndef _ER_COAP_COMMUNICATION_H_
+#define _ER_COAP_COMMUNICATION_H_
+
+#include "contiki.h"
+
+void
+coap_init_communication_layer(uint16_t port);
+
+void
+coap_send_message(uip_ipaddr_t *addr, uint16_t port, uint8_t *data, uint16_t length);
+
+void
+coap_handle_receive(void);
+
+#endif

apps/er-coap/er-coap-constants.h

@@ -94,6 +94,7 @@ typedef enum {
   NOT_FOUND_4_04 = 132,         /* NOT_FOUND */
   METHOD_NOT_ALLOWED_4_05 = 133,        /* METHOD_NOT_ALLOWED */
   NOT_ACCEPTABLE_4_06 = 134,    /* NOT_ACCEPTABLE */
+  REQUEST_ENTITY_INCOMPLETE_4_08 = 136,  /* REQUEST_ENTITY_INCOMPLETE */
   PRECONDITION_FAILED_4_12 = 140,       /* BAD_REQUEST */
   REQUEST_ENTITY_TOO_LARGE_4_13 = 141,  /* REQUEST_ENTITY_TOO_LARGE */
   UNSUPPORTED_MEDIA_TYPE_4_15 = 143,    /* UNSUPPORTED_MEDIA_TYPE */

apps/er-coap/er-coap-dtls.c

@@ -0,0 +1,161 @@
+#include "contiki.h"
+#include "contiki-net.h"
+#include "er-coap.h"
+#include "er-coap-engine.h"
+
+#include "dtls.h"
+
+#include <string.h>
+
+#define DEBUG DEBUG_NONE
+#include "dtls_debug.h"
+
+/*---------------------------------------------------------------------------*/
+
+/*---------------------------------------------------------------------------*/
+
+static struct dtls_context_t *dtls_ctx = NULL;
+
+static dtls_handler_t coap_dtls_callback = {
+  .write = coap_dtls_send_to_peer,
+  .read = coap_dtls_read_from_peer,
+  .event = NULL,
+#ifdef DTLS_PSK
+  .get_psk_info = coap_dtls_get_psk_info,
+#endif
+#ifdef DTLS_ECC
+  .get_ecdsa_key = NULL,
+  .verify_ecdsa_key = NULL,
+#endif
+};
+
+/*-----------------------------------------------------------------------------------*/
+void
+coap_init_communication_layer(uint16_t port)
+{
+  struct uip_udp_conn *udp_conn = NULL;
+
+  dtls_init();
+  dtls_set_log_level(DTLS_LOG_DEBUG);
+
+  udp_conn = udp_new(NULL, 0, NULL);
+  udp_bind(udp_conn, port);
+
+  dtls_ctx = dtls_new_context(udp_conn);
+  if(dtls_ctx) {
+    dtls_set_handler(dtls_ctx, &COAP_DTLS_CALLBACK);
+  }
+  /* new connection with remote host */
+  printf("COAP-DTLS listening on port %u\n", uip_ntohs(udp_conn->lport));
+}
+/*-----------------------------------------------------------------------------------*/
+void
+coap_send_message(uip_ipaddr_t *addr, uint16_t port,
+                  uint8_t *data, uint16_t length)
+{
+  session_t session;
+
+  dtls_session_init(&session);
+  uip_ipaddr_copy(&session.addr, addr);
+  session.port = port;
+
+  dtls_write(dtls_ctx, &session, data, length);
+}
+/*-----------------------------------------------------------------------------------*/
+void
+coap_handle_receive()
+{
+  session_t session;
+
+  if(uip_newdata()) {
+    dtls_session_init(&session);
+    uip_ipaddr_copy(&session.addr, &UIP_IP_BUF->srcipaddr);
+    session.port = UIP_UDP_BUF->srcport;
+
+    dtls_handle_message(dtls_ctx, &session, uip_appdata, uip_datalen());
+  }
+}
+/* DTLS Specific functions */
+/*-----------------------------------------------------------------------------------*/
+#ifdef DTLS_PSK
+/* This function is the "key store" for tinyDTLS. It is called to
+ * retrieve a key for the given identiy within this particular
+ * session. */
+int
+coap_dtls_get_psk_info(struct dtls_context_t *ctx, const session_t *session,
+                       dtls_credentials_type_t type,
+                       const unsigned char *id, size_t id_len,
+                       unsigned char *result, size_t result_length)
+{
+
+  struct keymap_t {
+    unsigned char *id;
+    size_t id_length;
+    unsigned char *key;
+    size_t key_length;
+  } psk[1] = {
+    { (unsigned char *)DTLS_IDENTITY, DTLS_IDENTITY_LENGTH, (unsigned char *)DTLS_PSK_KEY_VALUE, DTLS_PSK_KEY_VALUE_LENGTH },
+  };
+  if(type == DTLS_PSK_IDENTITY) {
+    if(id_len) {
+      dtls_debug("got psk_identity_hint: '%.*s'\n", id_len, id);
+    }
+
+    if(result_length < psk[0].id_length) {
+      dtls_warn("cannot set psk_identity -- buffer too small\n");
+      return dtls_alert_fatal_create(DTLS_ALERT_INTERNAL_ERROR);
+    }
+
+    memcpy(result, psk[0].id, psk[0].id_length);
+    return psk[0].id_length;
+  } else if(type == DTLS_PSK_KEY) {
+    if(id) {
+      int i;
+      for(i = 0; i < sizeof(psk) / sizeof(struct keymap_t); i++) {
+        if(id_len == psk[i].id_length && memcmp(id, psk[i].id, id_len) == 0) {
+          if(result_length < psk[i].key_length) {
+            dtls_warn("buffer too small for PSK");
+            return dtls_alert_fatal_create(DTLS_ALERT_INTERNAL_ERROR);
+          }
+
+          memcpy(result, psk[i].key, psk[i].key_length);
+          return psk[i].key_length;
+        }
+      }
+    }
+  } else {
+    return 0;
+  }
+
+  return dtls_alert_fatal_create(DTLS_ALERT_DECRYPT_ERROR);
+}
+#endif
+/*-----------------------------------------------------------------------------------*/
+int
+coap_dtls_send_to_peer(struct dtls_context_t *ctx,
+                       session_t *session, uint8 *data, size_t len)
+{
+
+  struct uip_udp_conn *conn = (struct uip_udp_conn *)dtls_get_app_data(ctx);
+
+  uip_ipaddr_copy(&conn->ripaddr, &session->addr);
+  conn->rport = session->port;
+
+  uip_udp_packet_send(conn, data, len);
+
+  /* Restore server connection to allow data from any node */
+  memset(&conn->ripaddr, 0, sizeof(conn->ripaddr));
+  memset(&conn->rport, 0, sizeof(conn->rport));
+
+  return len;
+}
+/*-----------------------------------------------------------------------------------*/
+int
+coap_dtls_read_from_peer(struct dtls_context_t *ctx,
+                         session_t *session, uint8 *data, size_t len)
+{
+  uip_len = len;
+  memmove(uip_appdata, data, len);
+  coap_receive(ctx);
+  return 0;
+}

apps/er-coap/er-coap-dtls.h

@@ -0,0 +1,47 @@
+#ifndef COAP_DTLS_H_
+#define COAP_DTLS_H_
+
+/* Internal configuration of tinydtls for er-coap-dtls */
+
+#if defined DTLS_CONF_IDENTITY && defined DTLS_CONF_IDENTITY_LENGTH
+#define DTLS_IDENTITY DTLS_CONF_IDENTITY
+#define DTLS_IDENTITY_LENGTH DTLS_CONF_IDENTITY_LENGTH
+#else
+#define DTLS_IDENTITY "Client_identity"
+#define DTLS_IDENTITY_LENGTH 15
+#endif
+
+#if defined DTLS_CONF_PSK_KEY && defined DTLS_CONF_PSK_KEY_LENGTH
+#define DTLS_PSK_KEY_VALUE DTLS_CONF_PSK_KEY
+#define DTLS_PSK_KEY_VALUE_LENGTH DTLS_CONF_PSK_KEY_LENGTH
+#else
+#warning "DTLS: Using default secret key !"
+#define DTLS_PSK_KEY_VALUE "secretPSK"
+#define DTLS_PSK_KEY_VALUE_LENGTH 9
+#endif
+
+/* Structure that hold tinydtls callbacks, has type 'dtls_handler_t'. */
+#ifndef COAP_DTLS_CALLBACK
+#ifdef COAP_DTLS_CONF_CALLBACK
+#define COAP_DTLS_CALLBACK COAP_DTLS_CONF_CALLBACK
+#else /* COAP_DTLS_CONF_CALLBACK */
+#define COAP_DTLS_CALLBACK coap_dtls_callback
+#endif /* COAP_DTLS_CALLBACK */
+
+/* Send 'data' to peer defined by session */
+int coap_dtls_send_to_peer(struct dtls_context_t *ctx,
+                           session_t *session, uint8 *data, size_t len);
+
+/* Read 'data' from peer */
+int coap_dtls_read_from_peer(struct dtls_context_t *ctx,
+                             session_t *session, uint8 *data, size_t len);
+#ifdef DTLS_PSK
+/* Retrieve the key for given identity withing this session */
+int coap_dtls_get_psk_info(struct dtls_context_t *ctx,
+                           const session_t *session,
+                           dtls_credentials_type_t type,
+                           const unsigned char *id, size_t id_len,
+                           unsigned char *result, size_t result_length);
+#endif
+
+#endif /* COAP_DTLS_H_ */

apps/er-coap/er-coap-engine.c

@@ -41,6 +41,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include "er-coap-engine.h"
+#include "er-coap-communication.h"
 
 #define DEBUG 0
 #if DEBUG
@@ -64,8 +65,8 @@ static service_callback_t service_cbk = NULL;
 /*---------------------------------------------------------------------------*/
 /*- Internal API ------------------------------------------------------------*/
 /*---------------------------------------------------------------------------*/
-static int
+int
-coap_receive(void)
+coap_receive()
 {
   erbium_status_code = NO_ERROR;
 
@@ -346,7 +347,7 @@ PROCESS_THREAD(coap_engine, ev, data)
     PROCESS_YIELD();
 
     if(ev == tcpip_event) {
-      coap_receive();
+      coap_handle_receive();
     } else if(ev == PROCESS_EVENT_TIMER) {
       /* retransmissions are handled here */
       coap_check_transactions();
@@ -482,6 +483,7 @@ const struct rest_implementation coap_rest_implementation = {
     NOT_FOUND_4_04,
     METHOD_NOT_ALLOWED_4_05,
     NOT_ACCEPTABLE_4_06,
+    REQUEST_ENTITY_INCOMPLETE_4_08,
     REQUEST_ENTITY_TOO_LARGE_4_13,
     UNSUPPORTED_MEDIA_TYPE_4_15,
     INTERNAL_SERVER_ERROR_5_00,

apps/er-coap/er-coap-engine.h

@@ -52,6 +52,7 @@ typedef coap_packet_t rest_request_t;
 typedef coap_packet_t rest_response_t;
 
 void coap_init_engine(void);
+int coap_receive();
 
 /*---------------------------------------------------------------------------*/
 /*- Client Part -------------------------------------------------------------*/

apps/er-coap/er-coap-udp.c

@@ -0,0 +1,42 @@
+#include "contiki.h"
+#include "contiki-net.h"
+#include "er-coap-engine.h"
+#include "er-coap-communication.h"
+
+#include <string.h>
+
+#define DEBUG DEBUG_NONE
+#include "uip-debug.h"
+
+static struct uip_udp_conn *udp_conn = NULL;
+
+/*-----------------------------------------------------------------------------------*/
+void
+coap_init_communication_layer(uint16_t port)
+{
+  /* new connection with remote host */
+  udp_conn = udp_new(NULL, 0, NULL);
+  udp_bind(udp_conn, port);
+  PRINTF("Listening on port %u\n", uip_ntohs(udp_conn->lport));
+}
+/*-----------------------------------------------------------------------------------*/
+void
+coap_send_message(uip_ipaddr_t *addr, uint16_t port, uint8_t *data, uint16_t length)
+{
+  /* Configure connection to reply to client */
+  uip_ipaddr_copy(&udp_conn->ripaddr, addr);
+  udp_conn->rport = port;
+
+  uip_udp_packet_send(udp_conn, data, length);
+  PRINTF("-sent UDP datagram (%u)-\n", length);
+
+  /* Restore server connection to allow data from any node */
+  memset(&udp_conn->ripaddr, 0, sizeof(udp_conn->ripaddr));
+  udp_conn->rport = 0;
+}
+/*-----------------------------------------------------------------------------------*/
+void
+coap_handle_receive()
+{
+  coap_receive();
+}

apps/er-coap/er-coap.c

@@ -44,6 +44,7 @@
 
 #include "er-coap.h"
 #include "er-coap-transactions.h"
+#include "er-coap-communication.h"
 
 #define DEBUG 0
 #if DEBUG
@@ -60,7 +61,6 @@
 /*---------------------------------------------------------------------------*/
 /*- Variables ---------------------------------------------------------------*/
 /*---------------------------------------------------------------------------*/
-static struct uip_udp_conn *udp_conn = NULL;
 static uint16_t current_mid = 0;
 
 coap_status_t erbium_status_code = NO_ERROR;
@@ -279,9 +279,7 @@ void
 coap_init_connection(uint16_t port)
 {
   /* new connection with remote host */
-  udp_conn = udp_new(NULL, 0, NULL);
+  coap_init_communication_layer(port);
-  udp_bind(udp_conn, port);
-  PRINTF("Listening on port %u\n", uip_ntohs(udp_conn->lport));
 
   /* initialize transaction ID */
   current_mid = random_rand();
@@ -422,23 +420,6 @@ coap_serialize_message(void *packet, uint8_t *buffer)
   return (option - buffer) + coap_pkt->payload_len; /* packet length */
 }
 /*---------------------------------------------------------------------------*/
-void
-coap_send_message(uip_ipaddr_t *addr, uint16_t port, uint8_t *data,
-                  uint16_t length)
-{
-  /* configure connection to reply to client */
-  uip_ipaddr_copy(&udp_conn->ripaddr, addr);
-  udp_conn->rport = port;
-
-  uip_udp_packet_send(udp_conn, data, length);
-
-  PRINTF("-sent UDP datagram (%u)-\n", length);
-
-  /* restore server socket to allow data from any node */
-  memset(&udp_conn->ripaddr, 0, sizeof(udp_conn->ripaddr));
-  udp_conn->rport = 0;
-}
-/*---------------------------------------------------------------------------*/
 coap_status_t
 coap_parse_message(void *packet, uint8_t *data, uint16_t data_len)
 {

apps/json-resource/Makefile.json-resource

@@ -0,0 +1 @@
+json-resource_src = generic_resource.c

apps/json-resource/generic_resource.c

@@ -0,0 +1,271 @@
+/*
+ * Copyright (c) 2014-15, Ralf Schlatterbeck Open Source Consulting
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/**
+ * \addtogroup Generic CoAP Resource Handler
+ *
+ * @{
+ */
+
+
+/**
+ * \file
+ *      Generic CoAP Resource Handler
+ * \author
+ *      Ralf Schlatterbeck <rsc@runtux.com>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "contiki.h"
+#include "jsonparse.h"
+#include "er-coap.h"
+#include "generic_resource.h"
+
+/* Error-handling macro */
+# define BYE(_exp, _tag) \
+   do {                                  \
+     PRINTF("Expect "_exp": %d\n",_tag); \
+     return -1;                          \
+   } while(0)
+
+#define DEBUG 1
+#if DEBUG
+#define PRINTF(...) printf(__VA_ARGS__)
+#else
+#define PRINTF(...)
+#endif
+
+int8_t
+json_parse_variable
+  (const uint8_t *bytes, size_t len, char *name, char *buf, size_t buflen)
+{
+  int tag = 0;
+  struct jsonparse_state state;
+  struct jsonparse_state *parser = &state;
+  PRINTF ("PUT: len: %d, %s\n", len, (const char *)bytes);
+  jsonparse_setup (parser, (const char *)bytes, len);
+  if ((tag = jsonparse_next (parser)) != JSON_TYPE_OBJECT) {
+    BYE ("OBJECT", tag);
+  }
+  if ((tag = jsonparse_next (parser)) != JSON_TYPE_PAIR_NAME) {
+    BYE ("PAIR_NAME", tag);
+  }
+  while (jsonparse_strcmp_value (parser, name) != 0) {
+    tag = jsonparse_next (parser);
+    if (tag != JSON_TYPE_PAIR) {
+      BYE ("PAIR", tag);
+    }
+    tag = jsonparse_next (parser);
+    tag = jsonparse_next (parser);
+    if (tag != ',') {
+      BYE (",", tag);
+    }
+    tag = jsonparse_next (parser);
+    if (tag != JSON_TYPE_PAIR_NAME) {
+      BYE ("PAIR_NAME", tag);
+    }
+  }
+  tag = jsonparse_next (parser);
+  if (tag != JSON_TYPE_PAIR) {
+    BYE ("PAIR", tag);
+  }
+  tag = jsonparse_next (parser);
+  if (tag != JSON_TYPE_STRING) {
+    BYE ("STRING", tag);
+  }
+  jsonparse_copy_value (parser, buf, buflen);
+  return 0;
+}
+
+static const char *get_uri (void *request)
+{
+  static char buf [MAX_URI_STRING_LENGTH];
+  const char *uri;
+  size_t len = coap_get_header_uri_path (request, &uri);
+  if (len > sizeof (buf) - 1) {
+    *buf = '\0';
+  } else {
+    strncpy (buf, uri, len);
+    buf [len] = '\0';
+  }
+  return buf;
+}
+
+static const char *get_query (void *request)
+{
+  static char buf [MAX_QUERY_STRING_LENGTH];
+  const char *query;
+  size_t len = coap_get_header_uri_query (request, &query);
+  if (len > sizeof (buf) - 1) {
+    *buf = '\0';
+  } else {
+    strncpy (buf, query, len);
+    buf [len] = '\0';
+  }
+  return buf;
+}
+
+void generic_get_handler
+  ( void *request
+  , void *response
+  , uint8_t *buffer
+  , uint16_t preferred_size
+  , int32_t *offset
+  , char *name
+  , int is_str
+  , size_t (*to_str)
+    ( const char *name
+    , const char *uri
+    , const char *query
+    , char *buf, size_t bsize
+    )
+  )
+{
+  int success = 1;
+  char temp [MAX_GET_STRING_LENGTH];
+  size_t len = 0;
+  unsigned int accept = -1;
+  const char *uri   = get_uri   (request);
+  const char *query = get_query (request);
+
+  REST.get_header_accept (request, &accept);
+  if (  accept != -1
+     && accept != REST.type.TEXT_PLAIN
+     && accept != REST.type.APPLICATION_JSON
+     )
+  {
+    success = 0;
+    REST.set_response_status (response, REST.status.NOT_ACCEPTABLE);
+    return;
+  }
+
+  // TEXT format
+  if (accept == REST.type.APPLICATION_JSON) {
+    len += snprintf
+      ( temp + len
+      , sizeof (temp) - len
+      , "{\n \"%s\" : %s"
+      , name
+      , is_str ? "\"" : ""
+      );
+    if (len > sizeof (temp)) {
+      success = 0;
+      goto out;
+    }
+    len += to_str (name, uri, query, temp + len, sizeof (temp) - len);
+    if (len > sizeof (temp)) {
+      success = 0;
+      goto out;
+    }
+    len += snprintf 
+      ( temp + len
+      , sizeof (temp) - len
+      , "%s\n}\n"
+      , is_str ? "\"" : ""
+      );
+    if (len > sizeof (temp)) {
+      success = 0;
+      goto out;
+    }
+  } else { // TEXT Format
+    len += to_str (name, uri, query, temp + len, sizeof (temp) - len);
+    if (len > sizeof (temp)) {
+      success = 0;
+      goto out;
+    }
+    len += snprintf (temp + len, sizeof (temp) - len, "\n");
+    if (len > sizeof (temp)) {
+      success = 0;
+      goto out;
+    }
+  }
+  memcpy (buffer, temp, len);
+  REST.set_header_content_type (response, accept);
+  REST.set_response_payload (response, buffer, len);
+out :
+  if (!success) {
+    REST.set_response_status (response, REST.status.BAD_REQUEST);
+  }
+}
+
+void generic_put_handler
+  ( void *request
+  , void *response
+  , uint8_t *buffer
+  , uint16_t preferred_size
+  , int32_t *offset
+  , char *name
+  , int (*from_str)
+    (const char *name, const char *uri, const char *query, const char *s)
+  )
+{
+  int success = 1;
+  char temp [100];
+  size_t len = 0;
+  const uint8_t  *bytes  = NULL;
+  unsigned int c_ctype;
+  const char *uri = get_uri (request);
+  const char *query = get_query (request);
+  REST.get_header_content_type (request, &c_ctype);
+
+  if (from_str && (len = coap_get_payload (request, &bytes))) {
+    if (c_ctype == REST.type.TEXT_PLAIN) {
+      int l = MIN (len, sizeof (temp) - 1);
+      temp [sizeof (temp) - 1] = 0;
+      strncpy (temp, (const char *)bytes, l);
+      temp [l] = 0;
+    } else { // jSON Format
+      if (json_parse_variable (bytes, len, name, temp, sizeof (temp)) < 0) {
+        success = 0;
+        goto out;
+      }
+    }
+    if (from_str (name, uri, query, temp) < 0) {
+      success = 0;
+    } else {
+      REST.set_response_status (response, REST.status.CHANGED);
+    }
+  } else {
+    success = 0;
+  }
+out:
+  if (!success) {
+    REST.set_response_status (response, REST.status.BAD_REQUEST);
+  }
+}
+
+/*
+ * VI settings, see coding style
+ * ex:ts=8:et:sw=2
+ */
+
+/** @} */
+

apps/json-resource/generic_resource.h

@@ -0,0 +1,178 @@
+/*
+ * Copyright (c) 2014-15, Ralf Schlatterbeck Open Source Consulting
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/**
+ * \defgroup Generic CoAP Resource Handler
+ *
+ * This factors the boilerplate code necessary for defining a resource
+ * together with the necessary handler. Currently this supports
+ * text/plain and application/json and outputs the resource with its
+ * name in json format. This may change in the future as more CoRE
+ * standards (e.g. see RFC 6690) get defined.
+ *
+ * @{
+ */
+
+
+/**
+ * \file
+ *      Generic CoAP Resource Handler
+ * \author
+ *      Ralf Schlatterbeck <rsc@runtux.com>
+ */
+
+#define STR__(s) #s
+#define STR_(s) STR__(s)
+
+#define MAX_GET_STRING_LENGTH   100
+#define MAX_URI_STRING_LENGTH    30
+#define MAX_QUERY_STRING_LENGTH  30
+
+/*
+ * A macro that extends the resource definition and also sets up the
+ * necessary handler function that calls format/parse routines that
+ * convert from/to string (fs and ts). The ts function needs to return
+ * the length written, similar to sprintf.
+ * The content type definitions ct="0 5" are text/plain and
+ * application/json, respectively, see rfc7252 Table 9 p. 91.
+ * Yes, this *is* a hack. But I hate boilerplate code.
+ */
+
+#define GENERIC_RESOURCE(name, title, unit, is_str, fs, ts)                \
+  static void name##_get_handler                                           \
+    ( void *request                                                        \
+    , void *response                                                       \
+    , uint8_t *buffer                                                      \
+    , uint16_t ps                                                          \
+    , int32_t *offset                                                      \
+    )                                                                      \
+  {                                                                        \
+    generic_get_handler                                                    \
+      (request, response, buffer, ps, offset, STR_(name), is_str, ts);     \
+  }                                                                        \
+  static void name##_put_handler                                           \
+    ( void *request                                                        \
+    , void *response                                                       \
+    , uint8_t *buffer                                                      \
+    , uint16_t ps                                                          \
+    , int32_t *offset                                                      \
+    )                                                                      \
+  {                                                                        \
+    generic_put_handler                                                    \
+      (request, response, buffer, ps, offset, STR_(name), fs);             \
+  }                                                                        \
+                                                                           \
+  RESOURCE ( res_##name                                                    \
+           , "title=\"" STR_(title) "\""                                   \
+             ";rt=UCUM:\"" STR_(unit) "\""                                 \
+             ";ct=\"0 5\""                                                 \
+           , (ts) ? name##_get_handler : NULL                              \
+           , NULL /* POST */                                               \
+           , (fs) ? name##_put_handler : NULL                              \
+           , NULL /* DELETE */                                             \
+           )
+
+/* Ignore constant pointer tests above */
+#pragma GCC diagnostic ignored "-Waddress"
+
+/**
+ * \brief Parse a resource in json format
+ * \param bytes: Input string received via coap
+ * \param len: Length of input string
+ * \param name: Name to search in json input
+ * \param buf: Output buffer
+ * \param buflen: Output buffer length
+ * \return 0 for success, -1 for error
+ *
+ * If compiled with DEBUG also prints the error encountered
+ */
+extern int8_t json_parse_variable
+  (const uint8_t *bytes, size_t len, char *name, char *buf, size_t buflen);
+
+/**
+ * \brief Generic coap GET resource handler
+ * \param name: The name of the variable in json
+ * \param to_str: Application method to format value for output;
+ *        the function may chose to format differently for coap or text
+ * The other parameters are the same as a normal resource handler
+ * This helps avoid boilerplate code for request handlers
+ *
+ * The callback functions get the name of the parameter as a first
+ * argument, this allows to re-use the same function for different
+ * parameters.  In addition it gets a buffer and the size of the buffer.
+ * It needs to return the number of bytes output, similar to sprintf.
+ */
+extern void generic_get_handler
+  ( void *request
+  , void *response
+  , uint8_t *buffer
+  , uint16_t preferred_size
+  , int32_t *offset
+  , char *name
+  , int is_str
+  , size_t (*to_str)
+    ( const char *name
+    , const char *uri
+    , const char *query
+    , char *buf
+    , size_t bsize
+    )
+  );
+
+/**
+ * \brief Generic coap PUT resource handler
+ * \param name: The name of the variable in json
+ * \param from_str: Application method to parse value from string
+ *        and act on it, may be NULL in which case the resource only
+ *        supports GET not PUT
+ * The other parameters are the same as a normal resource handler
+ * This helps avoid boilerplate code for request handlers
+ *
+ * The callback functions get the name of the parameter as a first
+ * argument, this allows to re-use the same function for different
+ * parameters. The from_str in addition gets the string to parse.
+ */
+extern void generic_put_handler
+  ( void *request
+  , void *response
+  , uint8_t *buffer
+  , uint16_t preferred_size
+  , int32_t *offset
+  , char *name
+  , int (*from_str)
+    (const char *name, const char *uri, const char *query, const char *s)
+  );
+
+/*
+ * VI settings, see coding style
+ * ex:ts=8:et:sw=2
+ */
+
+/** @} */
+

apps/ota-update/Makefile.ota-update

@@ -0,0 +1 @@
+ota-update_src = res_bootloader.c res_reboot.c res_upload_image.c

apps/ota-update/ota-update.h

@@ -0,0 +1,22 @@
+extern resource_t res_upload_image;
+extern resource_t res_part_count;
+extern resource_t res_part_size;
+extern resource_t res_boot_default;
+extern resource_t res_boot_next;
+extern resource_t res_active_part;
+extern resource_t res_part_start;
+extern resource_t res_part_ok;
+extern resource_t res_reboot;
+
+#define OTA_ACTIVATE_RESOURCES() \
+    static char resname[] = "ota/update";\
+    rest_activate_resource (&res_upload_image,   resname);\
+    rest_activate_resource (&res_part_count,     (char *)"ota/part_count");\
+    rest_activate_resource (&res_part_size,      (char *)"ota/part_size");\
+    rest_activate_resource (&res_boot_default,   (char *)"ota/boot_default");\
+    rest_activate_resource (&res_boot_next,      (char *)"ota/boot_next");\
+    rest_activate_resource (&res_active_part,    (char *)"ota/active_part");\
+    rest_activate_resource (&res_part_start,     (char *)"ota/part_start");\
+    rest_activate_resource (&res_part_ok,        (char *)"ota/part_ok");\
+    rest_activate_resource (&res_reboot,         (char *)"ota/reboot");
+

apps/ota-update/res_bootloader.c

@@ -0,0 +1,260 @@
+/*
+ * Copyright (c) 2015, Ralf Schlatterbeck Open Source Consulting
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * This file is part of the Contiki operating system.
+ */
+
+/**
+ * \file
+ *      Bootloader ressources
+ * \author
+ *      Ralf Schlatterbeck <rsc@runtux.com>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include "contiki.h"
+#include "contiki-net.h"
+#include "rest-engine.h"
+#include "er-coap-engine.h"
+#include "uiplib.h"
+#include "generic_resource.h"
+#include "bootloader_if.h"
+#include "Arduino.h"
+
+/*
+ * Resources to be activated need to be imported through the extern keyword.
+ * The build system automatically compiles the resources in the
+ * corresponding sub-directory.
+ */
+
+static size_t
+part_count
+    ( const char *name
+    , const char *uri
+    , const char *query
+    , char *buf
+    , size_t bsize
+    )
+{
+    return snprintf (buf, bsize, "%ld", bootloader_get_part_count ());
+}
+
+GENERIC_RESOURCE
+  ( part_count
+  , Partition Count
+  , count
+  , 0
+  , NULL
+  , part_count
+  );
+
+static size_t
+part_size
+    ( const char *name
+    , const char *uri
+    , const char *query
+    , char *buf
+    , size_t bsize
+    )
+{
+    return snprintf (buf, bsize, "%ld", bootloader_get_part_size ());
+}
+
+GENERIC_RESOURCE
+  ( part_size
+  , Partition Size
+  , count
+  , 0
+  , NULL
+  , part_size
+  );
+
+static size_t
+get_boot_default
+    ( const char *name
+    , const char *uri
+    , const char *query
+    , char *buf
+    , size_t bsize
+    )
+{
+    return snprintf (buf, bsize, "%ld", bootloader_get_boot_default ());
+}
+
+static int
+set_boot_default
+    (const char *name, const char *uri, const char *query, const char *s)
+{
+    uint32_t tmp = strtoul (s, NULL, 10);
+    bootloader_set_boot_default (tmp);
+    return 0;
+}
+
+GENERIC_RESOURCE
+  ( boot_default
+  , Default boot partition
+  , count
+  , 0
+  , set_boot_default
+  , get_boot_default
+  );
+
+static size_t
+get_boot_next
+    ( const char *name
+    , const char *uri
+    , const char *query
+    , char *buf
+    , size_t bsize
+    )
+{
+    return snprintf (buf, bsize, "%ld", bootloader_get_boot_next ());
+}
+
+static int
+set_boot_next
+    (const char *name, const char *uri, const char *query, const char *s)
+{
+    uint32_t tmp = strtoul (s, NULL, 10);
+    bootloader_set_boot_next (tmp);
+    return 0;
+}
+
+GENERIC_RESOURCE
+  ( boot_next
+  , Next boot partition
+  , count
+  , 0
+  , set_boot_next
+  , get_boot_next
+  );
+
+static size_t
+get_active_part
+    ( const char *name
+    , const char *uri
+    , const char *query
+    , char *buf
+    , size_t bsize
+    )
+{
+    return snprintf (buf, bsize, "%ld", bootloader_get_active_part ());
+}
+
+GENERIC_RESOURCE
+  ( active_part
+  , Currently active partition
+  , count
+  , 0
+  , NULL
+  , get_active_part
+  );
+
+/*
+ * Parse query info. We insist that the query starts with 'part='
+ * Then we parse the integer following the part= string and return the
+ * number. The number is always positive, if something goes wrong we
+ * return a negative number.
+ */
+static int get_query_partition (const char *query)
+{
+    if (strncmp (query, "part=", 5)) {
+        return -1;
+    }
+    return strtoul (query + 5, NULL, 10);
+}
+
+static size_t
+get_part_start
+    ( const char *name
+    , const char *uri
+    , const char *query
+    , char *buf
+    , size_t bsize
+    )
+{
+    int idx = get_query_partition (query);
+    if (idx < 0) {
+        return snprintf (buf, bsize, "Invalid: \"%s\" use part=N query", query);
+    }
+    return snprintf (buf, bsize, "%ld", bootloader_get_part_start (idx));
+}
+
+GENERIC_RESOURCE
+  ( part_start
+  , Start of partition
+  , count
+  , 0
+  , NULL
+  , get_part_start
+  );
+
+static int
+set_part_ok
+    (const char *name, const char *uri, const char *query, const char *s)
+{
+    uint32_t tmp = strtoul (s, NULL, 10);
+    int idx = get_query_partition (query);
+    if (idx < 0) {
+        return -1;
+    }
+    if (tmp) {
+        bootloader_set_part_ok (idx);
+    } else {
+        bootloader_clr_part_ok (idx);
+    }
+    return 0;
+}
+
+static size_t
+get_part_ok
+    ( const char *name
+    , const char *uri
+    , const char *query
+    , char *buf
+    , size_t bsize
+    )
+{
+    int idx = get_query_partition (query);
+    if (idx < 0) {
+        return snprintf (buf, bsize, "Invalid: \"%s\" use part=N query", query);
+    }
+    return snprintf (buf, bsize, "%ld", bootloader_get_part_ok (idx));
+}
+
+GENERIC_RESOURCE
+  ( part_ok
+  , Set/Clear Partition OK flag
+  , count
+  , 0
+  , set_part_ok
+  , get_part_ok
+  );

apps/ota-update/res_reboot.c

@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 2017, Marcus Priesch Open Source Consulting
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * This file is part of the Contiki operating system.
+ */
+
+/**
+ * \file
+ *      Reboot ressource
+ * \author
+ *      Marcus Priesch <marcus@priesch.co.at>
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include "contiki.h"
+#include "er-coap-engine.h"
+#include "generic_resource.h"
+#include "dev/watchdog.h"
+
+PROCESS(reboot_process, "reboot");
+PROCESS_THREAD(reboot_process, ev, data)
+{
+  static struct etimer etimer;
+
+  //PROCESS_EXITHANDLER(leds_off(LEDS_ALL);)
+
+  PROCESS_BEGIN();
+
+  //shell_output_str(&reboot_command,
+  //                 "Rebooting the node in four seconds...", "");
+
+  etimer_set(&etimer, CLOCK_SECOND * 4);
+  PROCESS_WAIT_UNTIL(etimer_expired(&etimer));
+  //leds_on(LEDS_RED);
+  //etimer_reset(&etimer);
+  //PROCESS_WAIT_UNTIL(etimer_expired(&etimer));
+  //leds_on(LEDS_GREEN);
+  //etimer_reset(&etimer);
+  //PROCESS_WAIT_UNTIL(etimer_expired(&etimer));
+  //leds_on(LEDS_BLUE);
+  //etimer_reset(&etimer);
+  //PROCESS_WAIT_UNTIL(etimer_expired(&etimer));
+
+  watchdog_reboot();
+
+  PROCESS_END();
+}
+
+
+
+static size_t
+get_reboot
+    ( const char *name
+    , const char *uri
+    , const char *query
+    , char *buf
+    , size_t bsize
+    )
+{
+    return snprintf (buf, bsize, "put 'OK' to reboot.");
+}
+
+static int
+do_reboot
+    (const char *name, const char *uri, const char *query, const char *s)
+{
+    if (strncmp (s, "OK", 2) == 0) {
+        process_start (&reboot_process, NULL);
+        return 0;
+    }
+    return 0;
+}
+
+GENERIC_RESOURCE
+  ( reboot
+  , Reboot node
+  , count
+  , 0
+  , do_reboot
+  , get_reboot
+  );
+

apps/ota-update/res_upload_image.c

@@ -0,0 +1,243 @@
+/*
+ * Copyright (C) 2017, Marcus Priesch, Ralf Schlatterbeck
+ * with code from the res-plugtest-large-update.c by
+ * Copyright (c) 2013, Institute for Pervasive Computing, ETH Zurich
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * This file is part of the Contiki operating system.
+ */
+
+/**
+ * \file
+ *      Over-the-air update using blockwise transfer
+ * \author
+ *      Marcus Priesch <marcus@priesch.co.at>
+ *      Ralf Schlatterbeck <rsc@runtux.com>
+ */
+
+#include <string.h>
+#include "sys/cc.h"
+#include "rest-engine.h"
+#include "er-coap.h"
+#include "contiki.h"
+#include "contiki-net.h"
+#include "er-coap.h"
+#include "Arduino.h"
+#include <avr/interrupt.h>
+#include "bootloader_if.h"
+
+#if 1
+#include <stdio.h>
+#define PRINTF(x) printf x
+#else
+#define PRINTF(x)
+#endif
+
+
+// We allocate this statically, otherwise we cannot flash a new image
+// when ram is exhausted!
+static uint8_t current_page [256];
+static uint32_t current_offset = 0;
+#define PAGESIZE (sizeof (current_page))
+
+/*
+ * Note that the current code relies on the fact that the bootloader
+ * used only supports two images. This may change in the future. We
+ * mainly need to relax some of the checks and use a different algorithm
+ * for computing imgidx, the index of the partition to be overwritten.
+ * If the bootloader supports more than two partitions at some point we
+ * may want the uploader to explicitly define the partition to be used.
+ */
+
+static void
+res_put_handler
+    ( void *request
+    , void *response
+    , uint8_t *buffer
+    , uint16_t preferred_size
+    , int32_t *offset
+    )
+{
+  coap_packet_t *const packet = (coap_packet_t *)request;
+  uint8_t *in_data = NULL;
+  size_t len = 0;
+  uint32_t partition_start = 0;
+  const uint32_t partition_size = bootloader_get_part_size  ();
+  uint32_t imgidx = 0;
+  unsigned int ct = -1;
+
+  /* If the currently-booted partition is not the default partition we
+   * do not allow overwriting a partition: Neither the currently-booted
+   * one (this would crash) nor the only partition that is marked
+   * bootable. We also insist that boot_next == boot_default.
+   */
+  if (bootloader_get_boot_default () != bootloader_get_boot_next ()) {
+    REST.set_response_status (response, REST.status.BAD_REQUEST);
+    const char *error_msg = "Won't overwrite boot_next";
+    REST.set_response_payload (response, error_msg, strlen (error_msg));
+    return;
+  }
+  if (bootloader_get_boot_default () != bootloader_get_active_part ()) {
+    REST.set_response_status (response, REST.status.BAD_REQUEST);
+    const char *error_msg = "Won't overwrite current";
+    REST.set_response_payload (response, error_msg, strlen (error_msg));
+    return;
+  }
+  imgidx = !bootloader_get_active_part ();
+  partition_start = bootloader_get_part_start (imgidx);
+
+  REST.get_header_content_type (request, &ct);
+
+  /* Require content_type APPLICATION_OCTET_STREAM */
+  if (ct != REST.type.APPLICATION_OCTET_STREAM) {
+    REST.set_response_status (response, REST.status.BAD_REQUEST);
+    const char *error_msg = "ContentType";
+    REST.set_response_payload (response, error_msg, strlen (error_msg));
+    return;
+  }
+
+  len = REST.get_request_payload (request, (const uint8_t **)&in_data);
+  PRINTF (("cur: %lu len: %lu, offset: %lu\n",
+    (uint32_t)current_offset, (uint32_t)len, (uint32_t)*offset));
+  PRINTF (("b1-offs: %lu, b1-size: %u, b1-num: %lu b1-more: %d b1-size1: %lu\n",
+      packet->block1_offset, packet->block1_size, packet->block1_num,
+      packet->block1_more, packet->size1));
+  if (len == 0 || NULL == in_data) {
+    REST.set_response_status (response, REST.status.BAD_REQUEST);
+    const char *error_msg = "NoPayload";
+    REST.set_response_payload (response, error_msg, strlen (error_msg));
+    return;
+  }
+
+  /* if the block1_offset is 0 a new transmission has started */
+  if (!packet->block1_offset) {
+    current_offset = 0;
+  }
+
+  if (packet->block1_offset > current_offset) {
+    REST.set_response_status (response, REST.status.REQUEST_ENTITY_INCOMPLETE);
+    const char *error_msg = "OutOfSequence";
+    REST.set_response_payload (response, error_msg, strlen (error_msg));
+    return;
+  }
+
+  /* Old packet or retransmission, immediately confirm */
+  if (packet->block1_offset && packet->block1_offset + len <= current_offset) {
+    REST.set_response_status (response, REST.status.CHANGED);
+    coap_set_header_block1
+      (response, packet->block1_num, 0, packet->block1_size);
+    return;
+  }
+
+  // FIXME: blocksize may be larger than our flash page size
+  if (len > PAGESIZE) {
+    REST.set_response_status (response, REST.status.INTERNAL_SERVER_ERROR);
+    const char *error_msg = "GRMPF: PageSize";
+    REST.set_response_payload (response, error_msg, strlen (error_msg));
+    return;
+  }
+  // FIXME: blocksize may be larger than our flash page size
+  // So we should handle this case and repeatedly flash a block until the
+  // received data is written.
+  if (current_offset % PAGESIZE + len > PAGESIZE) {
+    REST.set_response_status (response, REST.status.INTERNAL_SERVER_ERROR);
+    const char *error_msg = "GRMPF: blocksize";
+    REST.set_response_payload (response, error_msg, strlen (error_msg));
+    return;
+  }
+  // Should never happen, we test for < and > earlier.
+  if (packet->block1_offset != current_offset) {
+    REST.set_response_status (response, REST.status.INTERNAL_SERVER_ERROR);
+    const char *error_msg = "GRMPF: Offset";
+    REST.set_response_payload (response, error_msg, strlen (error_msg));
+    return;
+  }
+
+  if (packet->block1_offset + len > partition_size) {
+    REST.set_response_status
+      (response, REST.status.REQUEST_ENTITY_TOO_LARGE);
+    REST.set_response_payload
+      (response, buffer, sprintf ((char *)buffer, "%luB max.", partition_size));
+    return;
+  }
+
+  memcpy (current_page + current_offset % PAGESIZE, in_data, len);
+  /* Whenever an upload is started for a partition mark it as not ok */
+  if (current_offset == 0) {
+    PRINTF (("Clear partition_ok: %ld\n", imgidx));
+    bootloader_clr_part_ok (imgidx);
+  }
+  current_offset += len;
+
+  if (current_offset % PAGESIZE == 0) {
+    uint32_t dst_address = partition_start + current_offset - PAGESIZE;
+    /* Special case: Flash irq vectors to backup position */
+    if (current_offset - PAGESIZE < PART_IRQVEC_SIZE) {
+      /* Only for images not at position 0 write first PART_IRQVEC_SIZE
+       * bytes also to original position. For partition 0 it will be
+       * copied there anyway *and* we would crash if we wrote to the
+       * active memory!
+       */
+      if (partition_start != 0) {
+        PRINTF (("Flashing: %lx to %lx\n", (uint32_t)PAGESIZE, dst_address));
+        bootloader_write_page_to_flash (dst_address, PAGESIZE, current_page);
+      }
+      /* Note: The partition_size returned by the bootloader does *NOT*
+       * include the PART_IRQVEC_SIZE
+       */
+      dst_address = partition_start + partition_size
+                  + current_offset - PAGESIZE;
+    }
+    PRINTF (("Flashing: %lx to %lx\n", (uint32_t)PAGESIZE, dst_address));
+    bootloader_write_page_to_flash (dst_address, PAGESIZE, current_page);
+  } else if (!packet->block1_more) {
+    uint32_t dst_address =
+        partition_start + (current_offset / PAGESIZE) * PAGESIZE;
+    PRINTF (("Flashing: last %lx to %lx\n", (uint32_t)PAGESIZE, dst_address));
+    bootloader_write_page_to_flash (dst_address, PAGESIZE, current_page);
+  }
+
+
+  if (!packet->block1_more) {
+    // we are finished
+    bootloader_set_boot_next (imgidx);
+    current_offset = 0;
+  }
+
+  REST.set_response_status (response, REST.status.CHANGED);
+  coap_set_header_block1 (response, packet->block1_num, 0, packet->block1_size);
+}
+
+RESOURCE(
+    res_upload_image
+  , "title=\"Flash memory upgrade\";rt=\"block\""
+  , NULL
+  , NULL
+  , res_put_handler
+  , NULL
+  );
+

apps/rest-engine/rest-constants.h

@@ -56,6 +56,7 @@ struct rest_implementation_status {
   const unsigned int NOT_FOUND;                 /* NOT_FOUND_4_04,                NOT_FOUND_404 */
   const unsigned int METHOD_NOT_ALLOWED;        /* METHOD_NOT_ALLOWED_4_05,       METHOD_NOT_ALLOWED_405 */
   const unsigned int NOT_ACCEPTABLE;            /* NOT_ACCEPTABLE_4_06,           NOT_ACCEPTABLE_406 */
+  const unsigned int REQUEST_ENTITY_INCOMPLETE; /* REQUEST_ENTITY_INCOMPLETE_4_08, REQUEST_ENTITY_INCOMPLETE_408 */
   const unsigned int REQUEST_ENTITY_TOO_LARGE;  /* REQUEST_ENTITY_TOO_LARGE_4_13, REQUEST_ENTITY_TOO_LARGE_413 */
   const unsigned int UNSUPPORTED_MEDIA_TYPE;    /* UNSUPPORTED_MEDIA_TYPE_4_15,   UNSUPPORTED_MEDIA_TYPE_415 */
 

apps/serial-shell/serial-shell.c

@@ -49,7 +49,7 @@
 
 #include <stdio.h>
 #include <string.h>
-
+#include "arduino-process.h"
 
 /*---------------------------------------------------------------------------*/
 PROCESS(serial_shell_process, "Contiki serial shell");
@@ -58,6 +58,8 @@ void
 shell_default_output(const char *text1, int len1, const char *text2, int len2)
 {
   int i;
+  
+  mcu_sleep_disable();
   if(text1 == NULL) {
     text1 = "";
     len1 = 0;
@@ -89,6 +91,7 @@ void
 shell_exit(void)
 {
 }
+
 /*---------------------------------------------------------------------------*/
 PROCESS_THREAD(serial_shell_process, ev, data)
 {
@@ -98,6 +101,7 @@ PROCESS_THREAD(serial_shell_process, ev, data)
 
   while(1) {
     PROCESS_WAIT_EVENT_UNTIL(ev == serial_line_event_message && data != NULL);
+    mcu_sleep_disable();
     shell_input(data, strlen(data));
   }
 

apps/shell/Makefile.shell

@@ -66,3 +66,11 @@ endif
 ifeq ($(TARGET),z1)
   shell_src += shell-sky.c shell-exec.c
 endif
+
+ifeq ($(TARGET),osd-merkur-256)
+  shell_src += shell-merkur.c
+endif
+
+ifeq ($(TARGET),osd-merkur-128)
+  shell_src += shell-merkur.c
+endif

apps/shell/shell-merkur.c

@@ -0,0 +1,237 @@
+/*
+ * Copyright (c) 2008, Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * This file is part of the Contiki operating system.
+ *
+ */
+
+/**
+ * \file
+ *         Merkurboard-specific Contiki shell commands
+ * \author
+ *         Harald Pichler <harald@the-develop.net>
+ */
+
+#include "contiki.h"
+#include <stdio.h>
+#include <stdlib.h>     /* strtol */
+#include "sys/cc.h"
+#include "dev/radio.h"
+#include "shell-merkur.h"
+#include "params.h"
+#include "arduino-process.h"
+
+/*---------------------------------------------------------------------------*/
+PROCESS(shell_txpower_process, "txpower");
+SHELL_COMMAND(txpower_command,
+	      "txpower",
+	      "txpower <power>: change transmission power 0 (3dbm, default) to 15 (-17.2dbm)",
+	      &shell_txpower_process);
+PROCESS(shell_panid_process, "panid");
+SHELL_COMMAND(panid_command,
+	      "panid",
+	      "panid <0xabcd>: change panid (default 0xabcd)",
+	      &shell_panid_process);
+PROCESS(shell_rfchannel_process, "rfchannel");
+SHELL_COMMAND(rfchannel_command,
+	      "rfchannel",
+	      "rfchannel <channel>: change radio channel (11 - 26)",
+	      &shell_rfchannel_process);
+PROCESS(shell_ccathresholds_process, "ccathresholds");
+SHELL_COMMAND(ccathresholds_command,
+	      "ccathresholds",
+	      "ccathresholds <threshold: change cca thresholds -91 to -61 dBm (default -77)",
+	      &shell_ccathresholds_process);
+PROCESS(shell_macconf_process, "macconf");
+SHELL_COMMAND(macconf_command,
+	      "macconf",
+	      "macconf <conf>: change mac layer 0 -> do nothing; 1 -> Radio allways on",
+	      &shell_macconf_process);
+PROCESS(shell_saverfparam_process, "saverfparam");
+SHELL_COMMAND(saverfparam_command,
+	      "saverfparam",
+	      "saverfparam <> save radio parameters txpower, channel, panid to eeprom settingsmanager",
+	      &shell_saverfparam_process);
+
+/*---------------------------------------------------------------------------*/
+PROCESS_THREAD(shell_txpower_process, ev, data)
+{
+  radio_value_t value;
+  char buf[10];
+  const char *newptr;
+  PROCESS_BEGIN();
+
+  value = shell_strtolong(data, &newptr);
+  
+  /* If no transmission power was given on the command line, we print
+     out the current txpower. */
+  if(newptr == data) {
+	if(get_param(RADIO_PARAM_TXPOWER, &value) == RADIO_RESULT_OK) {
+    }
+  } else {
+    set_param(RADIO_PARAM_TXPOWER, value);
+  }
+
+  snprintf(buf, sizeof(buf), "%3d", value);
+  shell_output_str(&txpower_command, "TX Power: ", buf);
+
+  PROCESS_END();
+}
+/*---------------------------------------------------------------------------*/
+PROCESS_THREAD(shell_rfchannel_process, ev, data)
+{
+  radio_value_t value;
+  char buf[10];
+  const char *newptr;
+  PROCESS_BEGIN();
+
+  value = shell_strtolong(data, &newptr);
+  
+  /* If no channel was given on the command line, we print out the
+     current channel. */
+  if(newptr == data) {
+	if(get_param(RADIO_PARAM_CHANNEL, &value) == RADIO_RESULT_OK) {
+		
+    }
+  } else {
+    set_param(RADIO_PARAM_CHANNEL, value);
+  }
+
+  snprintf(buf, sizeof(buf), "%d", value);
+  shell_output_str(&rfchannel_command, "Channel: ", buf);
+
+  PROCESS_END();
+}
+/*---------------------------------------------------------------------------*/
+PROCESS_THREAD(shell_ccathresholds_process, ev, data)
+{
+  radio_value_t value;
+  char buf[10];
+  const char *newptr;
+  PROCESS_BEGIN();
+
+  value = shell_strtolong(data, &newptr);
+  
+  /* If no channel was given on the command line, we print out the
+     current channel. */
+  if(newptr == data) {
+	if(get_param(RADIO_PARAM_CCA_THRESHOLD, &value) == RADIO_RESULT_OK) {
+		
+    }
+  } else {
+    set_param(RADIO_PARAM_CCA_THRESHOLD, value);
+  }
+
+  snprintf(buf, sizeof(buf), "%d dBm", value);
+  shell_output_str(&rfchannel_command, "CCA Threshold: ", buf);
+
+  PROCESS_END();
+}
+/*---------------------------------------------------------------------------*/
+PROCESS_THREAD(shell_macconf_process, ev, data)
+{
+  radio_value_t value;
+  char buf[10];
+  const char *newptr;
+  PROCESS_BEGIN();
+
+  value = shell_strtolong(data, &newptr);
+  
+  /* If no transmission power was given on the command line, we print
+     out the current macconf. */
+  if(newptr == data) {
+    value = params_get_macconf();
+  } else {
+    params_set_macconf(value);
+  }
+
+  snprintf(buf, sizeof(buf), "%3d", value);
+  shell_output_str(&txpower_command, "macconf: ", buf);
+
+  PROCESS_END();
+}
+/*---------------------------------------------------------------------------*/
+PROCESS_THREAD(shell_panid_process, ev, data)
+{
+  radio_value_t value;
+  char buf[10];
+  char *newptr;
+  PROCESS_BEGIN();
+
+  value = strtol(data, &newptr, 0);
+  
+  /* If no channel was given on the command line, we print out the
+     current channel. */
+  if(newptr == data) {
+	if(get_param(RADIO_PARAM_PAN_ID, &value) != RADIO_RESULT_OK) {
+	//  printf("error: get_param RADIO_PARAM_PAN_ID\n");
+    }
+  } else {
+    set_param(RADIO_PARAM_PAN_ID, value);
+  }
+
+  snprintf(buf, sizeof(buf),"0x%02x%02x\n", (value >> 8) & 0xFF, value & 0xFF);
+  shell_output_str(&panid_command, "panid: ", buf);
+
+  PROCESS_END();
+}
+/*---------------------------------------------------------------------------*/
+PROCESS_THREAD(shell_saverfparam_process, ev, data)
+{
+  PROCESS_BEGIN();
+  /* Save txpower */
+  params_save_txpower();
+  /* Save rfchannel */
+  params_save_channel();  
+  /* Save ccathresholds */
+  // todo 
+  
+  /* Save panid */
+  params_save_panid();
+  /* Save macconf */
+  params_save_macconf();
+
+  shell_output_str(&rfchannel_command, "saverfparam done ", 0);
+
+  PROCESS_END();
+}
+/*---------------------------------------------------------------------------*/
+void
+shell_merkur_init(void)
+{
+//  shell_ps_init();
+  shell_reboot_init();
+  shell_register_command(&txpower_command);
+  shell_register_command(&rfchannel_command);
+  shell_register_command(&ccathresholds_command);  
+  shell_register_command(&panid_command);
+  shell_register_command(&macconf_command);  
+  shell_register_command(&saverfparam_command);
+//  shell_register_command(&s_command);
+}
+/*---------------------------------------------------------------------------*/

apps/shell/shell-merkur.h

@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2008, Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * This file is part of the Contiki operating system.
+ *
+ */
+
+/**
+ * \file
+ *         Header file for Tmote Sky-specific Contiki shell commands
+ * \author
+ *         harald pichler <harald@the-develop.net>
+ */
+
+#ifndef SHELL_MERKUR_H_
+#define SHELL_MERKUR_H_
+
+#include "shell.h"
+
+void shell_merkur_init(void);
+
+#endif /* SHELL_MERKUR_H_ */

apps/time/Makefile.time

@@ -0,0 +1,2 @@
+time_src = time.c resource_gmtime.c resource_timestamp.c \
+    resource_timezone.c resource_crontab.c cron.c

apps/time/README

@@ -0,0 +1,20 @@
+Timezones
+=========
+
+The new version supports time zones and daylight saving time (DST).
+Currently we support only a single timezone. We use the UNIX timezone
+format which is usually specified in an environment variable TZ.
+
+Note that for timezone information you can have different
+representation, either relative to Universal Time Coordinated (UTC) or
+to International Atomic Time (TAI), the latter contains leap seconds.
+Since most systems today use UTC *and* the clock of a microcontroller
+is typically not accurate enough to care about leap seconds, we're using
+timezone files relative to UTC.
+
+Wikipedia has a very good treatment of the public timezone database in
+https://en.wikipedia.org/wiki/Tz_database
+
+The format of timezone strings is described in the Linux manual page
+tzset(3). The timezone specification for Europe/Vienna is
+CET-1CEST,M3.5.0,M10.5.0/3

apps/time/bitstring.h

@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 1989 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Paul Vixie.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ *	@(#)bitstring.h	5.2 (Berkeley) 4/4/90
+ */
+
+typedef	unsigned char bitstr_t;
+
+/* internal macros */
+				/* byte of the bitstring bit is in */
+#define	_bit_byte(bit) \
+	((bit) >> 3)
+
+				/* mask for the bit within its byte */
+#define	_bit_mask(bit) \
+	(1 << ((bit)&0x7))
+
+/* external macros */
+				/* bytes in a bitstring of nbits bits */
+#define	bitstr_size(nbits) \
+	((((nbits) - 1) >> 3) + 1)
+
+
+				/* allocate a bitstring on the stack */
+#define	bit_decl(name, nbits) \
+	(name)[bitstr_size(nbits)]
+
+				/* is bit N of bitstring name set? */
+#define	bit_test(name, bit) \
+	((name)[_bit_byte(bit)] & _bit_mask(bit))
+
+				/* set bit N of bitstring name */
+#define	bit_set(name, bit) \
+	(name)[_bit_byte(bit)] |= _bit_mask(bit)
+
+				/* clear bit N of bitstring name */
+#define	bit_clear(name, bit) \
+	(name)[_bit_byte(bit)] &= ~_bit_mask(bit)
+
+				/* clear bits start ... stop in bitstring */
+#define	bit_nclear(name, start, stop) { \
+	register bitstr_t *_name = name; \
+	register int _start = start, _stop = stop; \
+	register int _startbyte = _bit_byte(_start); \
+	register int _stopbyte = _bit_byte(_stop); \
+	if (_startbyte == _stopbyte) { \
+		_name[_startbyte] &= ((0xff >> (8 - (_start&0x7))) | \
+				      (0xff << ((_stop&0x7) + 1))); \
+	} else { \
+		_name[_startbyte] &= 0xff >> (8 - (_start&0x7)); \
+		while (++_startbyte < _stopbyte) \
+			_name[_startbyte] = 0; \
+		_name[_stopbyte] &= 0xff << ((_stop&0x7) + 1); \
+	} \
+}
+
+				/* set bits start ... stop in bitstring */
+#define	bit_nset(name, start, stop) { \
+	register bitstr_t *_name = name; \
+	register int _start = start, _stop = stop; \
+	register int _startbyte = _bit_byte(_start); \
+	register int _stopbyte = _bit_byte(_stop); \
+	if (_startbyte == _stopbyte) { \
+		_name[_startbyte] |= ((0xff << (_start&0x7)) & \
+				    (0xff >> (7 - (_stop&0x7)))); \
+	} else { \
+		_name[_startbyte] |= 0xff << ((_start)&0x7); \
+		while (++_startbyte < _stopbyte) \
+	    		_name[_startbyte] = 0xff; \
+		_name[_stopbyte] |= 0xff >> (7 - (_stop&0x7)); \
+	} \
+}
+
+				/* find first bit clear in name */
+#define	bit_ffc(name, nbits, value) { \
+	register bitstr_t *_name = name; \
+	register int _byte, _nbits = nbits; \
+	register int _stopbyte = _bit_byte(_nbits), _value = -1; \
+	for (_byte = 0; _byte <= _stopbyte; ++_byte) \
+		if (_name[_byte] != 0xff) { \
+			_value = _byte << 3; \
+			for (_stopbyte = _name[_byte]; (_stopbyte&0x1); \
+			    ++_value, _stopbyte >>= 1); \
+			break; \
+		} \
+	*(value) = _value; \
+}
+
+				/* find first bit set in name */
+#define	bit_ffs(name, nbits, value) { \
+	register bitstr_t *_name = name; \
+	register int _byte, _nbits = nbits; \
+	register int _stopbyte = _bit_byte(_nbits), _value = -1; \
+	for (_byte = 0; _byte <= _stopbyte; ++_byte) \
+		if (_name[_byte]) { \
+			_value = _byte << 3; \
+			for (_stopbyte = _name[_byte]; !(_stopbyte&0x1); \
+			    ++_value, _stopbyte >>= 1); \
+			break; \
+		} \
+	*(value) = _value; \
+}

apps/time/cron.c

@@ -0,0 +1,488 @@
+/**
+ * \file
+ *      cron: Cron-like functionality
+ * \author
+ *      Ralf Schlatterbeck <rsc@runtux.com>
+ *
+ * \brief cron-like command scheduler
+ *
+ * Inspired by vixie's cron by Paul Vixie which is
+ * Copyright 1988,1990,1993,1994 by Paul Vixie
+ * 
+ * Distribute freely, except: don't remove my name from the source or
+ * documentation (don't take credit for my work), mark your changes (don't
+ * get me blamed for your possible bugs), don't alter or remove this
+ * notice.  May be sold if buildable source is provided to buyer.  No
+ * warrantee of any kind, express or implied, is included with this
+ * software; use at your own risk, responsibility for damages (if any) to
+ * anyone resulting from the use of this software rests entirely with the
+ * user.
+ *
+ * Changes to make this work on a microcontroller by Ralf Schlatterbeck
+ * In fact this is mostly a rewrite but keeps central algorithms and
+ * some data structures of the original.
+ * The syntax is simplified, we don't support the @ notation (e.g.
+ * @hourly) and named entities (e.g. weekday names instead of numbers).
+ * Furthermore we can't send email and don't support environment
+ * variables. The called commands are functions registered via a
+ * registration mechanism before runtime.
+ * Copyright 2016 Ralf Schlatterbeck, distribute with the conditions
+ * given above.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <ctype.h>
+#include <assert.h>
+#include "contiki.h"
+#include "cron.h"
+#include "xtime.h"
+
+#undef DEBUG
+
+static struct cron_entry   cron_entries  [MAX_CRON_ENTRIES];
+static struct cron_cmd     cron_commands [MAX_CRON_COMMANDS];
+static size_t cron_registered_entries  = 0;
+static size_t cron_registered_commands = 0;
+static struct cron_entry *entry_freelist = NULL;
+static struct cron_entry *entry_list     = NULL;
+
+typedef int64_t minute_t;
+static xtime_t start_time;
+static minute_t cron_clock_time;
+
+/* Register a new cron command
+ * A command consists of a name (which must be unique, uniqueness is not
+ * enforced currently as registrations are done once at initialization
+ * time), a function to be called and a parameter.
+ */
+int cron_register_command
+    (const char *name, void (*function)(void *), void * parameter)
+{
+    if (cron_registered_commands >= MAX_CRON_COMMANDS) {
+        return -1;
+    }
+    cron_commands [cron_registered_commands].name      = name;
+    cron_commands [cron_registered_commands].function  = function;
+    cron_commands [cron_registered_commands].parameter = parameter;
+    cron_registered_commands++;
+    return 0;
+}
+
+/*
+ * Allocate a new crontab entry.
+ * This allocates from the freelist and returns NULL if no more entries
+ * are available.
+ * Implementation note: If cron_registered_entries is 0 we first
+ * initialize the entry_freelist and the entry_list.
+ */
+struct cron_entry *allocate_cron_entry (void)
+{
+    size_t n;
+    struct cron_entry *e;
+    if (cron_registered_entries == 0) {
+        entry_list = NULL;
+        entry_freelist = &cron_entries [0];
+        for (n=0; n < (MAX_CRON_ENTRIES - 1); n++) {
+            cron_entries [n].next = &cron_entries [n+1];
+        }
+        cron_entries [MAX_CRON_ENTRIES - 1].next = NULL;
+    }
+    if (cron_registered_entries >= MAX_CRON_ENTRIES) {
+        return NULL;
+    }
+    e = entry_freelist;
+    entry_freelist = e->next;
+    e->next = entry_list;
+    entry_list = e;
+    cron_registered_entries++;
+    return e;
+}
+
+void free_cron_entry (struct cron_entry *obsolete)
+{
+    struct cron_entry *e;
+    assert (cron_registered_entries);
+    if (entry_list == obsolete) {
+        entry_list = obsolete->next;
+        obsolete->next = entry_freelist;
+        entry_freelist = obsolete;
+        cron_registered_entries--;
+        return;
+    }
+    for (e=entry_list; e; e=e->next) {
+        if (e->next == obsolete) {
+            e->next = obsolete->next;
+            obsolete->next = entry_freelist;
+            entry_freelist = obsolete;
+            cron_registered_entries--;
+            break;
+        }
+    }
+    assert (e != NULL);
+}
+
+struct cron_entry *get_cron_entry (size_t idx)
+{
+    if (idx >= MAX_CRON_ENTRIES) {
+        return NULL;
+    }
+    return &cron_entries [idx];
+}
+
+/* Set the number in bits, return 0 on success -1 on error */
+static int set_element (bitstr_t *bits, int low, int high, int n)
+{
+    if (n < low || n > high) {
+        return -1;
+    }
+    bit_set (bits, (n - low));
+    return 0;
+}
+
+static const char *get_number (int *np, int high, const char *s)
+{
+    char *endptr;
+    long l = strtol (s, &endptr, 10);
+    if (endptr == s || errno == ERANGE || l > high) {
+        return NULL;
+    }
+    *np = l;
+    return endptr;
+}
+
+static const char *get_range (bitstr_t *bits, int low, int high, const char *s)
+{
+    int i;
+    int n1, n2, n3;
+
+    if (*s == '*') {
+        /* '*' means "first-last" but can be modified by /step */
+        n1 = low;
+        n2 = high;
+        if (*++s == '\0') {
+            return NULL;
+        }
+    } else {
+        s = get_number (&n1, high, s);
+        if (s == NULL || *s == '\0') {
+            return NULL;
+        }
+        if (*s != '-') {
+            if (set_element (bits, low, high, n1) < 0) {
+                return NULL;
+            }
+            return s;
+        } else {
+            if (*++s == '\0') {
+                return NULL;
+            }
+            s = get_number (&n2, high, s);
+            if (*s == '\0') {
+                return NULL;
+            }
+        }
+    }
+    if (*s == '/') {
+        if (*++s == '\0') {
+            return NULL;
+        }
+        s = get_number (&n3, high, s);
+        if (*s == '\0') {
+            return NULL;
+        }
+    } else {
+        n3 = 1;
+    }
+    /* Explicit check for sane values */
+    if (n1 < low || n1 > high || n2 < low || n2 > high) {
+        return NULL;
+    }
+    for (i=n1; i<=n2; i+=n3) {
+        if (set_element (bits, low, high, i) < 0) {
+            return NULL;
+        }
+    }
+    return s;
+}
+
+static const char *get_list (bitstr_t *bits, int low, int high, const char *s)
+{
+    int done = 0;
+    bit_nclear (bits, 0, (high - low + 1));
+    while (!done) {
+        s = get_range (bits, low, high, s);
+        if (NULL == s) {
+            return NULL;
+        }
+        if (*s == ',') {
+            s++;
+        } else {
+            done = 1;
+        }
+    }
+    /* Skip white space */
+    while (s && isspace (*s)) {
+        s++;
+    }
+    return s;
+}
+
+/*
+ * Parse a single crontab entry on a single line.
+ * We get the line via CoAP.
+ * Returns 0 if parsed successfully, -1 on error.
+ * On error the err pointer is set to the error message.
+ */
+int parse_crontab_line
+    (const char *line, struct cron_entry *e, const char **err)
+{
+    size_t n;
+    const char *s = line;
+    size_t cmd_len = 0;
+
+    e->flags &= ~VALID;
+    if (*s == '*') {
+        e->flags |= MIN_STAR;
+    }
+    s = get_list (e->minute, FIRST_MINUTE, LAST_MINUTE, s);
+    if (NULL == s || *s == '\0') {
+        *err = "minute";
+        return -1;
+    }
+    if (*s == '*') {
+        e->flags |= HR_STAR;
+    }
+    s = get_list (e->hour, FIRST_HOUR, LAST_HOUR, s);
+    if (NULL == s || *s == '\0') {
+        *err = "hour";
+        return -1;
+    }
+    if (*s == '*') {
+        e->flags |= DOM_STAR;
+    }
+    s = get_list (e->dom, FIRST_DOM, LAST_DOM, s);
+    if (NULL == s || *s == '\0') {
+        *err = "dom";
+        return -1;
+    }
+    s = get_list (e->month, FIRST_MONTH, LAST_MONTH, s);
+    if (NULL == s || *s == '\0') {
+        *err = "month";
+        return -1;
+    }
+    if (*s == '*') {
+        e->flags |= DOW_STAR;
+    }
+    s = get_list (e->dow, FIRST_DOW, LAST_DOW, s);
+    if (NULL == s || *s == '\0') {
+        *err = "dow";
+        return -1;
+    }
+    /* Make sundays equivalent */
+    if (bit_test (e->dow, 0) || bit_test (e->dow, 7)) {
+        bit_set (e->dow, 0);
+        bit_set (e->dow, 7);
+    }
+    /* strip whitespace at *end* of command
+     * by getting length without whitespace
+     */
+    for (n=0; s [n]; n++) {
+        if (!isspace (s [n])) {
+            cmd_len = n + 1;
+        }
+    }
+    for (n=0; n<cron_registered_commands; n++) {
+        if (  cmd_len == strlen (cron_commands [n].name)
+           && !strncmp (cron_commands [n].name, s, cmd_len)
+           )
+        {
+            e->cmd = &cron_commands [n];
+            break;
+        }
+    }
+    if (n == cron_registered_commands) {
+        *err = "command";
+        return -1;
+    }
+    e->flags |= VALID;
+    return 0;
+}
+
+static void set_time (void)
+{
+    struct xtm *tm;
+    struct xtimeval tv;
+    xgettimeofday (&tv, NULL);
+    start_time = tv.tv_sec;
+    tm = xlocaltime (&start_time);
+    /* We adjust the time to GMT so we can catch DST changes */
+    cron_clock_time = (start_time + tm->tm_gmtoff) / (xtime_t)SECONDS_PER_MINUTE;
+}
+
+static void find_jobs (minute_t vtime, int do_wild, int do_nonwild)
+{
+    xtime_t virtual_second = vtime * SECONDS_PER_MINUTE;
+    struct xtm *tm = xgmtime (&virtual_second);
+    int minute, hour, dom, month, dow;
+    struct cron_entry *e;
+
+    /* make 0-based values out of these so we can use them as indicies */
+    minute = tm->tm_min -FIRST_MINUTE;
+    hour = tm->tm_hour -FIRST_HOUR;
+    dom = tm->tm_mday -FIRST_DOM;
+    month = tm->tm_mon +1 /* 0..11 -> 1..12 */ -FIRST_MONTH;
+    dow = tm->tm_wday -FIRST_DOW;
+    #ifdef DEBUG
+    printf ("%d %d %d %d %d\n", minute, hour, dom, month, dow);
+    #endif
+
+    /* the dom/dow situation is odd.  '* * 1,15 * Sun' will run on the
+     * first and fifteenth AND every Sunday;  '* * * * Sun' will run *only*
+     * on Sundays;  '* * 1,15 * *' will run *only* the 1st and 15th.  this
+     * is why we keep 'e->dow_star' and 'e->dom_star'.  yes, it's bizarre.
+     * like many bizarre things, it's the standard.
+     */
+    for (e = entry_list; e; e = e->next) {
+        #ifdef DEBUG
+        if (e->flags & VALID) {
+            printf ("Checking entry %s\n", e->cmd->name);
+        }
+        printf ("valid:  %d\n", (e->flags & VALID));
+        printf ("minute: %d\n", (bit_test (e->minute, minute)));
+        printf ("hour:   %d\n", (bit_test (e->hour,   hour)));
+        printf ("month   %d\n", (bit_test (e->month,  month)));
+        printf ("dom*    %d\n", (e->flags & DOM_STAR));
+        printf ("dow*    %d\n", (e->flags & DOW_STAR));
+        printf ("dow     %d\n", (bit_test (e->dow,  dow)));
+        printf ("dom     %d\n", (bit_test (e->dom,  dom)));
+        printf ("min*    %d\n", (e->flags & MIN_STAR));
+        printf ("hr*     %d\n", (e->flags & HR_STAR));
+        printf ("nonwild %d\n", (do_nonwild));
+        #endif
+        if (  (e->flags & VALID)
+           && bit_test (e->minute, minute)
+           && bit_test (e->hour, hour)
+           && bit_test (e->month, month)
+           && ( ((e->flags & DOM_STAR) || (e->flags & DOW_STAR))
+              ? (bit_test (e->dow, dow) && bit_test (e->dom, dom))
+              : (bit_test (e->dow, dow) || bit_test (e->dom, dom))
+              )
+           )
+        {
+            if (  (do_nonwild && !(e->flags & (MIN_STAR | HR_STAR)))
+               || (do_wild    &&  (e->flags & (MIN_STAR | HR_STAR)))
+               )
+            {
+                printf ("Cron: calling \"%s\"\n", e->cmd->name);
+                e->cmd->function (e->cmd->parameter);
+            }
+        }
+    }
+}
+
+/*
+ * The cron callback function must be run regularly, at least once per
+ * minute.
+ * Implementation:
+ * Clocks are in minutes since the epoch (time() / 60).
+ * virtual_time is the time it *would* be if we are called promptly and
+ * nobody ever changed the clock. It is monotonically increasing...
+ * unless a timejump happens.
+ * time_running is the time we were last called. We determine
+ * initialization by checking time_running for -1.
+ * cron_clock_time is the current time for this run.
+ */
+void cron (void)
+{
+    static minute_t time_running = -1;
+    static minute_t virtual_time = -1;
+    minute_t time_diff;
+
+    /*
+     * ... calculate how the current time differs from
+     * our virtual clock. Classify the change into one
+     * of 4 cases
+     */
+    set_time ();
+    if (time_running == cron_clock_time) {
+        #ifdef DEBUG
+        printf ("time not reached\n");
+        #endif
+        return;
+    }
+    time_running = cron_clock_time;
+    time_diff = time_running - virtual_time;
+    #ifdef DEBUG
+    printf ("time_diff: %ld\n", (long)time_diff);
+    #endif
+    /* shortcut for the most common case */
+    if (time_diff == 1) {
+        virtual_time = time_running;
+        find_jobs (virtual_time, 1, 1);
+    } else {
+        int wakeup_kind = -1;
+        if (time_diff > -(3*MINUTE_COUNT)) {
+            wakeup_kind = 0;
+        }
+        if (time_diff > 0) {
+            wakeup_kind = 1;
+        }
+        if (time_diff > 5) {
+            wakeup_kind = 2;
+        }
+        if (time_diff > (3*MINUTE_COUNT)) {
+            wakeup_kind = 3;
+        }
+        #ifdef DEBUG
+        printf ("wakeup_kind: %d\n", wakeup_kind);
+        #endif
+        switch (wakeup_kind) {
+        /* time_diff is a small positive number (wokeup late)
+         * run jobs for each virtual minute until caught up.
+         */
+        case 1:
+            do {
+                virtual_time++;
+                find_jobs (virtual_time, 1, 1);
+            } while (virtual_time < time_running);
+            break;
+        /* time_diff is a medium-sized positive number, for example
+         * because we went to DST. Run wildcard jobs once, then run any
+         * fixed-time jobs that would otherwise be skipped. If we use up
+         * our minute  (possible, if there are a lot of jobs to run) go
+         * around the loop again so that wildcard jobs have a chance to
+         * run, and we do our housekeeping.
+         */
+        case 2:
+            /* run wildcard jobs for current minute */
+            find_jobs (time_running, 1, 0);
+            /* run fixed-time jobs for each minute missed */
+            do {
+                virtual_time++;
+                find_jobs (virtual_time, 0, 1);
+                set_time ();
+            } while (  virtual_time < time_running
+                    && cron_clock_time == time_running
+                    );
+            break;
+        /* time_diff is a small or medium-sized negative num, eg.
+         * because of DST ending. Just run the wildcard jobs. The
+         * fixed-time jobs probably have already run, and should not be
+         * repeated. virtual_time does not change until we are caught up.
+         */
+        case 0:
+            find_jobs (time_running, 1, 0);
+            break;
+        /* Other: time has changed a *lot*, jump virtual time, and run
+         * everything
+         */
+        default:
+            virtual_time = time_running;
+            find_jobs (time_running, 1, 1);
+            break;
+        }
+    }
+}

apps/time/cron.h

@@ -0,0 +1,91 @@
+/*
+ * Definitions for cron
+ * Inspired by vixie's cron by Paul Vixie which is
+ * Copyright 1988,1990,1993,1994 by Paul Vixie
+ * 
+ * Distribute freely, except: don't remove my name from the source or
+ * documentation (don't take credit for my work), mark your changes (don't
+ * get me blamed for your possible bugs), don't alter or remove this
+ * notice.  May be sold if buildable source is provided to buyer.  No
+ * warrantee of any kind, express or implied, is included with this
+ * software; use at your own risk, responsibility for damages (if any) to
+ * anyone resulting from the use of this software rests entirely with the
+ * user.
+ * Changes to make this work on a microcontroller by Ralf Schlatterbeck
+ * In fact this is mostly a rewrite but keeps central algorithms of the
+ * original.
+ * Copyright 2016 Ralf Schlatterbeck, distribute with the conditions
+ * given above.
+ */
+
+#ifndef _cron_h_
+#define _cron_h_
+
+#include "bitstring.h"
+
+#define SECONDS_PER_MINUTE 60
+
+#define FIRST_MINUTE    0
+#define LAST_MINUTE     59
+#define MINUTE_COUNT    (LAST_MINUTE - FIRST_MINUTE + 1)
+
+#define FIRST_HOUR      0
+#define LAST_HOUR       23
+#define HOUR_COUNT      (LAST_HOUR - FIRST_HOUR + 1)
+
+#define FIRST_DOM       1
+#define LAST_DOM        31
+#define DOM_COUNT       (LAST_DOM - FIRST_DOM + 1)
+
+#define FIRST_MONTH     1
+#define LAST_MONTH      12
+#define MONTH_COUNT     (LAST_MONTH - FIRST_MONTH + 1)
+
+/* note on DOW: 0 and 7 are both Sunday, for compatibility reasons. */
+#define FIRST_DOW       0
+#define LAST_DOW        7
+#define DOW_COUNT       (LAST_DOW - FIRST_DOW + 1)
+
+#ifndef MAX_CRON_ENTRIES
+#define MAX_CRON_ENTRIES 5
+#endif
+
+#ifndef MAX_CRON_COMMANDS
+#define MAX_CRON_COMMANDS 5
+#endif
+
+struct cron_cmd {
+    const char *name;
+    void      (*function)(void *);
+    void       *parameter;
+};
+
+struct cron_entry {
+    struct cron_entry *next;
+    struct cron_cmd   *cmd;
+    bitstr_t           bit_decl(minute, MINUTE_COUNT);
+    bitstr_t           bit_decl(hour,   HOUR_COUNT);
+    bitstr_t           bit_decl(dom,    DOM_COUNT);
+    bitstr_t           bit_decl(month,  MONTH_COUNT);
+    bitstr_t           bit_decl(dow,    DOW_COUNT);
+    int                flags;
+
+#define DOM_STAR        0x01
+#define DOW_STAR        0x02
+#define WHEN_REBOOT     0x04
+#define MIN_STAR        0x08
+#define HR_STAR         0x10
+#define VALID           0x20
+};
+
+extern int parse_crontab_line
+    (const char *line, struct cron_entry *e, const char **err);
+extern int cron_register_command
+    (const char *name, void (*function)(void *), void * parameter);
+
+extern struct cron_entry *allocate_cron_entry (void);
+extern struct cron_entry *get_cron_entry (size_t idx);
+extern void               free_cron_entry (struct cron_entry *e);
+extern void               cron (void);
+
+#endif /* _cron_h_ */

apps/time/resource_crontab.c

@@ -0,0 +1,125 @@
+/**
+ * \file
+ *      Resource for crontab entry
+ * \author
+ *      Ralf Schlatterbeck <rsc@runtux.com>
+ *
+ * \brief get/put crontab entry
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "contiki.h"
+#include "time_resource.h"
+#include "jsonparse.h"
+#include "er-coap.h"
+#include "generic_resource.h"
+#include "cron.h"
+
+static size_t get_index_from_uri (const char *uri)
+{
+  const char *s;
+  char *endptr;
+  size_t idx;
+  if (uri == NULL) {
+    return MAX_CRON_ENTRIES;
+  }
+  if (NULL == (s = strrchr (uri, '/'))) {
+    return MAX_CRON_ENTRIES;
+  }
+  idx = strtoul (s+1, &endptr, 10);
+  if (s == endptr || *endptr != '\0') {
+    return MAX_CRON_ENTRIES;
+  }
+  return idx;
+}
+
+int crontab_from_string
+  (const char *name, const char *uri, const char *query, const char *s)
+{
+  const char *err;
+  int res;
+  size_t idx = get_index_from_uri (uri);
+  if (idx >= MAX_CRON_ENTRIES) {
+    return -1;
+  }
+  res = parse_crontab_line (s, get_cron_entry (idx), &err);
+  if (res < 0) {
+    printf ("Error parsing: %s\n", err);
+    return -1;
+  }
+  return 0;
+}
+
+size_t
+crontab_to_string
+  ( const char *name
+  , const char *uri
+  , const char *query
+  , char *buf
+  , size_t bsize
+  )
+{
+  /* FIXME: For now we only return "valid" or "invalid" until someone
+   * comes up with a clever algorithm to reconstruct a crontab string
+   * from the cron_entry struct.
+   */
+  size_t idx = get_index_from_uri (uri);
+  struct cron_entry *e;
+  if (idx >= MAX_CRON_ENTRIES) {
+    return MAX_GET_STRING_LENGTH;
+  }
+  e = get_cron_entry (idx);
+  if (e->flags & VALID) {
+    return snprintf (buf, bsize, "valid");
+  }
+  return snprintf (buf, bsize, "invalid");
+}
+
+GENERIC_RESOURCE
+  ( crontab
+  , crontab-entry
+  , s
+  , 1
+  , crontab_from_string
+  , crontab_to_string
+  );
+
+/* Allocate all cron entries and the necessary resources */
+void activate_cron_resources (void)
+{
+  size_t n;
+  for (n=0; n<MAX_CRON_ENTRIES; n++) {
+    resource_t *res;
+    char *buf;
+    size_t len;
+    struct cron_entry *e;
+    char name [15];
+    /* Need to copy the resource because resource->url holds the path
+     * under which we activate it using rest_activate_resource
+     */
+    if (NULL == (res = malloc (sizeof (*res)))) {
+        printf ("Error malloc\n");
+        break;
+    }
+    memcpy (res, &res_crontab, sizeof (*res));
+    e = allocate_cron_entry ();
+    assert (!(e->flags & VALID));
+    len = snprintf (name, sizeof (name), "crontab/%u", n);
+    name [sizeof (name) -1] = '\0';
+    assert (len < 15);
+    if (NULL == (buf = malloc (len + 1))) {
+        printf ("Error malloc\n");
+        break;
+    }
+    strcpy (buf, name);
+    rest_activate_resource (res, buf);
+  }
+}
+
+/*
+ * VI settings, see coding style
+ * ex:ts=8:et:sw=2
+ */
+

apps/time/resource_gmtime.c

@@ -0,0 +1,63 @@
+/**
+ * \file
+ *      Resource for gmtime (utc) / localtime handling
+ * \author
+ *      Ralf Schlatterbeck <rsc@runtux.com>
+ *
+ * \brief get time as a string in utc or localtime
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "contiki.h"
+#include "xtime.h"
+#include "time_resource.h"
+#include "jsonparse.h"
+#include "er-coap.h"
+#include "generic_resource.h"
+
+size_t time_to_string
+  (const char *name, const char *uri, const char *query, char *buf, size_t bs)
+{
+    struct xtimeval tv;
+    struct xtm tm;
+    struct xtm *(*method)(const xtime_t *, struct xtm *) = xgmtime_r;
+    if (0 == strcmp (name, "localtime")) {
+        method = xlocaltime_r;
+    }
+    xgettimeofday (&tv, NULL);
+    method (&tv.tv_sec, &tm);
+    return snprintf
+      ( buf
+      , bs
+      , "%lu-%02u-%02u %02u:%02u:%02u %s"
+      , 1900 + tm.tm_year
+      , tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec
+      , tm.tm_zone
+      );
+}
+
+GENERIC_RESOURCE \
+    ( localtime
+    , Local time
+    , formatted time
+    , 1
+    , NULL
+    , time_to_string
+    );
+
+GENERIC_RESOURCE \
+    ( utc
+    , UTC
+    , formatted time
+    , 1
+    , NULL
+    , time_to_string
+    );
+
+/*
+ * VI settings, see coding style
+ * ex:ts=8:et:sw=2
+ */
+

apps/time/resource_timestamp.c

@@ -0,0 +1,63 @@
+/**
+ * \file
+ *      Resource for timestamp handling
+ * \author
+ *      Ralf Schlatterbeck <rsc@runtux.com>
+ *
+ * \brief get/put time in seconds since 1970 (UNIX time)
+ * Note: the internal format of the time in seconds is a 64bit number
+ * unfortunately javascript (json) will only support double for which
+ * the mantissa isn't long enough for representing that number. So we're
+ * back to 32 bit and have a year 2038 problem.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "contiki.h"
+#include "xtime.h"
+#include "time_resource.h"
+#include "jsonparse.h"
+#include "er-coap.h"
+#include "generic_resource.h"
+
+int timestamp_from_string
+  (const char *name, const char *uri, const char *query, const char *s)
+{
+  struct xtimeval tv;
+  // FIXME: Platform has no strtoll (long long)?
+  tv.tv_sec = strtol (s, NULL, 10);
+  xsettimeofday (&tv, NULL);
+  return 0;
+}
+
+size_t
+timestamp_to_string
+  ( const char *name
+  , const char *uri
+  , const char *query
+  , char *buf
+  , size_t bsize
+  )
+{
+  struct xtimeval tv;
+  xgettimeofday (&tv, NULL);
+  // FIXME: Platform doesn't seem to support long long printing
+  // We get empty string
+  return snprintf (buf, bsize, "%ld", (long)tv.tv_sec);
+}
+
+GENERIC_RESOURCE
+  ( timestamp
+  , Time
+  , s
+  , 1
+  , timestamp_from_string
+  , timestamp_to_string
+  );
+
+/*
+ * VI settings, see coding style
+ * ex:ts=8:et:sw=2
+ */
+

apps/time/resource_timezone.c

@@ -0,0 +1,55 @@
+/**
+ * \file
+ *      Resource for timezone handling
+ * \author
+ *      Ralf Schlatterbeck <rsc@runtux.com>
+ *
+ * \brief get/put timezone string
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "contiki.h"
+#include "xtime.h"
+#include "time_resource.h"
+#include "jsonparse.h"
+#include "er-coap.h"
+#include "generic_resource.h"
+
+int timezone_from_string
+  (const char *name, const char *uri, const char *query, const char *s)
+{
+  set_tz (s);
+  return 0;
+}
+
+size_t
+timezone_to_string
+  ( const char *name
+  , const char *uri
+  , const char *query
+  , char *buf
+  , size_t bsize
+  )
+{
+  if (get_tz (buf, bsize) == NULL) {
+    *buf = '\0';
+  }
+  return strlen (buf);
+}
+
+GENERIC_RESOURCE
+  ( timezone
+  , TZ
+  , s
+  , 1
+  , timezone_from_string
+  , timezone_to_string
+  );
+
+/*
+ * VI settings, see coding style
+ * ex:ts=8:et:sw=2
+ */
+

apps/time/time.c

@@ -0,0 +1,847 @@
+/**
+ * \addgroup Time related functions
+ *
+ * @{
+ */
+#include "contiki.h"
+#include <errno.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include "contiki-lib.h"
+#include "xtime.h"
+#include "tzparse.h"
+
+#define SECSPERMIN      60
+#define MINSPERHOUR     60
+#define HOURSPERDAY     24
+#define DAYSPERWEEK     7
+#define DAYSPERNYEAR    365
+#define DAYSPERLYEAR    366
+#define SECSPERHOUR     (SECSPERMIN * MINSPERHOUR)
+#define SECSPERDAY      ((long) SECSPERHOUR * HOURSPERDAY)
+#define MONSPERYEAR     12
+
+static const int mon_lengths[2][MONSPERYEAR] =
+{ { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
+, { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }
+};
+
+/*
+ * Static timezone information
+ */
+static struct tzoffset_info localtime_tzoffset;
+
+/* Used for gmtime and localtime, according to manpage on linux the
+ * internal value may be overwritten "by subsequent calls to any of the
+ * date  and  time  functions".
+ */
+static struct xtm tm;
+
+/*
+ * Internal variables to manage offset of utc from the contiki clock
+ * and timezone offset from utc in minutes.
+ * For now we don't manage the sub-second offset -- time of setting the
+ * clock and the precisiont of the clock in use don't warrant this
+ * effort.
+ * The last_seconds is used to check if we had a seconds overflow,
+ * although this happens only every 136 years :-)
+ */
+static xtime_t  clock_offset;
+static uint32_t last_seconds;
+
+static xtime_t
+transtime (xtime_t janfirst, int year, const struct tzrule *rp, long offset);
+
+# define LEAP_YEAR(_year) \
+    ((_year % 4) == 0 && (_year % 100 != 0 || _year % 400 == 0))
+# define YDAYS(_year) (LEAP_YEAR(year) ? 366 : 365)
+
+struct xtm *xgmtime_r (const xtime_t *timep, struct xtm *ptm)
+{
+    unsigned int year;
+    int days, month, month_len;
+    xtime_t t = *timep;
+    ptm->tm_sec = t % 60;
+    t /= 60;
+    ptm->tm_min = t % 60;
+    t /= 60;
+    ptm->tm_hour = t % 24;
+    t /= 24;
+    ptm->tm_wday = (t+4) % 7;
+    year = 1970;
+    days =  0;
+    while ((days += YDAYS (year)) <= t)
+    {
+        year++;
+    }
+    ptm->tm_year = year - 1900;
+    days -= YDAYS (year);
+    t    -= days;
+    ptm->tm_yday = t;
+    for (month=0; month<12; month++)
+    {
+        if (month == 1)
+        {
+            month_len = LEAP_YEAR (year) ? 29 : 28;
+        }
+        else
+        {
+            int m = month;
+            if (m >= 7)
+            {
+                m -= 1;
+            }
+            m &= 1;
+            month_len = m ? 30 : 31;
+        }
+        if (t >= month_len)
+        {
+            t -= month_len;
+        }
+        else
+        {
+            break;
+        }
+    }
+    ptm->tm_mon    = month;
+    ptm->tm_mday   = t + 1;
+    ptm->tm_isdst  = 0;
+    ptm->tm_gmtoff = 0;
+    ptm->tm_zone   = "UTC";
+    return ptm;
+}
+
+struct xtm *xgmtime (const xtime_t *timep)
+{
+    return xgmtime_r (timep, &tm);
+}
+
+/*
+ * Compute is_dst flag of given timestamp
+ */
+static int is_dst (const xtime_t *timep, const struct tzoffset_info *tzo)
+{
+    xtime_t janfirst = 0;
+    xtime_t starttime, endtime;
+    int year = 1970;
+    int lastdst = 0;
+    if (tzo->dstname == NULL) {
+        return 0;
+    }
+
+    for (year = 1970; janfirst < *timep; year++) {
+        starttime = transtime (janfirst, year, &tzo->start, tzo->stdoffset);
+        endtime   = transtime (janfirst, year, &tzo->end,   tzo->dstoffset);
+        if (starttime <= *timep && endtime <= *timep) {
+            lastdst = (starttime > endtime);
+        } else if (starttime > *timep && endtime <= *timep) {
+            return 0;
+        } else if (starttime <= *timep && endtime > *timep) {
+            return 1;
+        } else if (starttime > *timep && endtime > *timep) {
+            return lastdst;
+        }
+        janfirst += YDAYS (year) * SECSPERDAY;
+    }
+    return lastdst;
+}
+
+struct xtm *xlocaltime_r (const xtime_t *timep, struct xtm *ptm)
+{
+    const struct tzoffset_info *tzo = &localtime_tzoffset;
+    int isdst = 0;
+    long offset = 0;
+    xtime_t t = *timep;
+
+    if (tzo->stdname == NULL) {
+        set_tz (DEFAULT_TIMEZONE);
+    }
+    isdst  = is_dst (timep, tzo);
+    offset = isdst ? tzo->dstoffset : tzo->stdoffset;
+    t -= offset;
+    xgmtime_r (&t, ptm);
+    ptm->tm_isdst  = isdst;
+    ptm->tm_gmtoff = -offset;
+    ptm->tm_zone   = isdst ? tzo->dstname : tzo->stdname;
+    return ptm;
+}
+
+struct xtm *xlocaltime (const xtime_t *timep)
+{
+    return xlocaltime_r (timep, &tm);
+}
+
+/**
+ * \brief Get time in seconds and microseconds
+ * xgettimeofday will return the clock time as the microseconds part
+ * while xsettimeofday will *ignore* the microseconds part (for now).
+ * Note that the contiki clock interface is broken anyway, we can't read
+ * seconds and sub-seconds atomically. We try to work around this by
+ * repeatedly reading seconds, sub-seconds, seconds until first and
+ * second read of seconds match.
+ */
+int xgettimeofday (struct xtimeval *tv, struct timezone *tz)
+{
+    uint32_t cs;
+    if (tv) {
+        int i;
+        /* Limit tries to get the same second twice to two */
+        for (i=0; i<2; i++) {
+            cs = clock_seconds ();
+            if (cs < last_seconds) {
+                clock_offset += 0xFFFFFFFFL;
+                clock_offset ++;
+            }
+            last_seconds = cs;
+            tv->tv_sec = cs + clock_offset;
+            tv->tv_usec = ((xtime_t)(clock_time () % CLOCK_SECOND))
+                        * 1000000L / CLOCK_SECOND;
+            if (cs == clock_seconds ()) {
+                break;
+            }
+        }
+    }
+    if (tz) {
+        const struct tzoffset_info *tzo = &localtime_tzoffset;
+        tz->tz_dsttime     = is_dst (&tv->tv_sec, tzo);
+        if (tz->tz_dsttime) {
+            tz->tz_minuteswest = -tzo->dstoffset / 60;
+        } else {
+            tz->tz_minuteswest = -tzo->stdoffset / 60;
+        }
+    }
+    return 0;
+}
+
+/**
+ * \brief Set time in seconds, microseconds ignored for now
+ */
+int xsettimeofday (const struct xtimeval *tv, const struct timezone *tz)
+{
+    /* Don't allow setting timezone */
+    if (tz) {
+        errno = ERANGE;
+        return -1;
+    }
+    if (tv) {
+        uint32_t cs;
+        cs = clock_seconds ();
+        clock_offset = tv->tv_sec - cs;
+    }
+    return 0;
+}
+
+/*
+ * Save timezone names into reserved string buffer and fill in the names
+ * into the given tzoffset_info.
+ * Return -1 on error, 0 for success.
+ */
+static int save_tznames
+    ( const char *stdname, const char *dstname
+    , size_t stdlen, size_t dstlen
+    , struct tzoffset_info *tzo
+    )
+{
+    size_t len = stdlen;
+    if (stdname == NULL) {
+        return -1;
+    }
+    if (dstname != NULL) {
+        len += dstlen;
+    }
+    if (len + 2 > sizeof (tzo->namebuf)) {
+        return -1;
+    }
+    tzo->stdname = tzo->namebuf;
+    strncpy (tzo->namebuf, stdname, stdlen);
+    tzo->namebuf [stdlen] = '\0';
+    if (dstlen) {
+        strncpy (tzo->namebuf + stdlen + 1, dstname, dstlen);
+        tzo->namebuf [stdlen + 1 + dstlen] = '\0';
+        tzo->dstname = tzo->namebuf + stdlen + 1;
+    } else {
+        tzo->dstname = NULL;
+    }
+    return 0;
+}
+
+/*
+ * Utility functions for timezone string parsing (POSIX section 8)
+ * Code adapted from OpenBSD localtime.c 1.57 2015/12/12 21:25:44
+ * which is in the public domain.
+ */
+
+/*
+ * The DST rules to use if TZ has no rules:
+ * We default to US rules as of 1999-08-17.
+ * POSIX 1003.1 section 8.1.1 says that the default DST rules are
+ * implementation dependent; for historical reasons, US rules are a
+ * common default.
+ */
+#ifndef TZDEFRULESTRING
+#define TZDEFRULESTRING ",M4.1.0,M10.5.0"
+#endif
+
+/*
+ * Given the Epoch-relative time of January 1, 00:00:00 UTC, in a year, the
+ * year, a rule, and the offset from UTC at the time that rule takes effect,
+ * calculate the Epoch-relative time that rule takes effect.
+ */
+
+static xtime_t
+transtime(xtime_t janfirst, int year, const struct tzrule *rulep, long offset)
+{
+    int     leapyear;
+    xtime_t value;
+    int     i;
+    int     d, m1, yy0, yy1, yy2, dow;
+
+    value = 0;
+    leapyear = LEAP_YEAR (year);
+    switch (rulep->r_type) {
+
+    case JULIAN_DAY:
+        /*
+         * Jn - Julian day, 1 == January 1, 60 == March 1 even in leap
+         * years.
+         * In non-leap years, or if the day number is 59 or less, just
+         * add SECSPERDAY times the day number-1 to the time of
+         * January 1, midnight, to get the day.
+         */
+        value = janfirst + (rulep->r_day - 1) * SECSPERDAY;
+        if (leapyear && rulep->r_day >= 60) {
+            value += SECSPERDAY;
+        }
+        break;
+
+    case DAY_OF_YEAR:
+        /*
+         * n - day of year.
+         * Just add SECSPERDAY times the day number to the time of
+         * January 1, midnight, to get the day.
+         */
+        value = janfirst + rulep->r_day * SECSPERDAY;
+        break;
+
+    case MONTH_NTH_DAY_OF_WEEK:
+        /*
+         * Mm.n.d - nth "dth day" of month m.
+         */
+        value = janfirst;
+        for (i = 0; i < rulep->r_mon - 1; ++i) {
+            value += mon_lengths [leapyear][i] * SECSPERDAY;
+        }
+
+        /*
+        ** Use Zeller's Congruence to get day-of-week of first day of
+        ** month.
+        */
+        m1  = (rulep->r_mon + 9) % 12 + 1;
+        yy0 = (rulep->r_mon <= 2) ? (year - 1) : year;
+        yy1 = yy0 / 100;
+        yy2 = yy0 % 100;
+        dow = ((26 * m1 - 2) / 10 + 1 + yy2 + yy2 / 4 + yy1 / 4 - 2 * yy1) % 7;
+        if (dow < 0) {
+            dow += DAYSPERWEEK;
+        }
+
+        /*
+        ** "dow" is the day-of-week of the first day of the month. Get
+        ** the day-of-month (zero-origin) of the first "dow" day of the
+        ** month.
+        */
+        d = rulep->r_day - dow;
+        if (d < 0) {
+            d += DAYSPERWEEK;
+        }
+        for (i = 1; i < rulep->r_week; ++i) {
+            if (d + DAYSPERWEEK >= mon_lengths[leapyear][rulep->r_mon - 1]) {
+                break;
+            }
+            d += DAYSPERWEEK;
+        }
+
+        /*
+        ** "d" is the day-of-month (zero-origin) of the day we want.
+        */
+        value += d * SECSPERDAY;
+        break;
+    }
+
+    /*
+    ** "value" is the Epoch-relative time of 00:00:00 UTC on the day in
+    ** question. To get the Epoch-relative time of the specified local
+    ** time on that day, add the transition time and the current offset
+    ** from UTC.
+    */
+    return value + rulep->r_time + offset;
+}
+
+/*
+ * Given a pointer into a time zone string, scan until a character that is not
+ * a valid character in a zone name is found. Return a pointer to that
+ * character.
+ */
+
+static const char *getzname (const char *s)
+{
+    char c;
+    while ((c = *s) != '\0' && !isdigit(c) && c != ',' && c != '-' && c != '+'){
+        ++s;
+    }
+    return s;
+}
+
+/*
+ * Given a pointer into an extended time zone string, scan until the ending
+ * delimiter of the zone name is located. Return a pointer to the delimiter.
+ *
+ * As with getzname above, the legal character set is actually quite
+ * restricted, with other characters producing undefined results.
+ * We don't do any checking here; checking is done later in common-case code.
+ */
+
+static const char *getqzname (const char *strp, const int delim)
+{
+    int c;
+    while ((c = *strp) != '\0' && c != delim) {
+            ++strp;
+    }
+    return strp;
+}
+
+/*
+ * Given a pointer into a time zone string, extract a number from that string.
+ * Check that the number is within a specified range; if it is not, return
+ * NULL.
+ * Otherwise, return a pointer to the first character not part of the number.
+ */
+
+static const char *getnum (const char *strp, int *nump, int min, int max)
+{
+    char    c;
+    int     num;
+
+    if (strp == NULL || !isdigit ((c = *strp))) {
+        return NULL;
+    }
+    num = 0;
+    do {
+        num = num * 10 + (c - '0');
+        if (num > max) {
+            return NULL; /* illegal value */
+        }
+        c = *++strp;
+    } while (isdigit (c));
+    if (num < min) {
+        return NULL; /* illegal value */
+    }
+    *nump = num;
+    return strp;
+}
+
+/*
+ * Given a pointer into a time zone string, extract a number of seconds,
+ * in hh[:mm[:ss]] form, from the string.
+ * If any error occurs, return NULL.
+ * Otherwise, return a pointer to the first character not part of the number
+ * of seconds.
+ */
+
+static const char *getsecs (const char *strp, long *secsp)
+{
+    int num;
+
+    /*
+     * `HOURSPERDAY * DAYSPERWEEK - 1' allows quasi-Posix rules like
+     * "M10.4.6/26", which does not conform to Posix,
+     * but which specifies the equivalent of
+     * ``02:00 on the first Sunday on or after 23 Oct''.
+     */
+    strp = getnum (strp, &num, 0, HOURSPERDAY * DAYSPERWEEK - 1);
+    if (strp == NULL) {
+        return NULL;
+    }
+    *secsp = num * (long) SECSPERHOUR;
+    if (*strp == ':') {
+        ++strp;
+        strp = getnum (strp, &num, 0, MINSPERHOUR - 1);
+        if (strp == NULL) {
+            return NULL;
+        }
+        *secsp += num * SECSPERMIN;
+        if (*strp == ':') {
+            ++strp;
+            /* `SECSPERMIN' allows for leap seconds. */
+            strp = getnum (strp, &num, 0, SECSPERMIN);
+            if (strp == NULL) {
+                return NULL;
+            }
+            *secsp += num;
+        }
+    }
+    return strp;
+}
+
+/*
+ * Given a pointer into a time zone string, extract an offset, in
+ * [+-]hh[:mm[:ss]] form, from the string.
+ * If any error occurs, return NULL.
+ * Otherwise, return a pointer to the first character not part of the time.
+ */
+
+static const char *getoffset (const char *strp, long *offsetp)
+{
+    int neg = 0;
+
+    if (*strp == '-') {
+        neg = 1;
+        ++strp;
+    } else if (*strp == '+') {
+        ++strp;
+    }
+    strp = getsecs (strp, offsetp);
+    if (strp == NULL) {
+        return NULL;            /* illegal time */
+    }
+    if (neg) {
+        *offsetp = -*offsetp;
+    }
+    return strp;
+}
+
+/*
+ * Parse (optionally extended) timezone name. Return pointer to
+ * (undelimited) timezone name in tzn and length of same in len.
+ * Return pointer to first character *after* name, NULL on error.
+ * Factored from original tzparse function.
+ */
+static const char *
+egettzname (const char *strp, size_t *len, const char **tzn)
+{
+    *tzn = strp;
+    if (*strp == '<') {
+        strp++;
+        *tzn = strp;
+        strp = getqzname (strp, '>');
+        if (*strp != '>') {
+            return NULL;
+        }
+        *len = strp - *tzn;
+        strp++;
+    } else {
+        strp = getzname (strp);
+        *len = strp - *tzn;
+    }
+    return strp;
+}
+
+/*
+** Given a pointer into a time zone string, extract a rule in the form
+** date[/time]. See POSIX section 8 for the format of "date" and "time".
+** If a valid rule is not found, return NULL.
+** Otherwise, return a pointer to the first character not part of the rule.
+*/
+
+static const char *getrule (const char *strp, struct tzrule *rulep)
+{
+    if (*strp == 'J') {
+        /*
+         * Julian day.
+         */
+        rulep->r_type = JULIAN_DAY;
+        ++strp;
+        strp = getnum (strp, &rulep->r_day, 1, DAYSPERNYEAR);
+    } else if (*strp == 'M') {
+        /*
+         * Month, week, day.
+         */
+        rulep->r_type = MONTH_NTH_DAY_OF_WEEK;
+        ++strp;
+        strp = getnum (strp, &rulep->r_mon, 1, MONSPERYEAR);
+        if (strp == NULL) {
+            return NULL;
+        }
+        if (*strp++ != '.') {
+            return NULL;
+        }
+        strp = getnum (strp, &rulep->r_week, 1, 5);
+        if (strp == NULL) {
+            return NULL;
+        }
+        if (*strp++ != '.') {
+            return NULL;
+        }
+        strp = getnum (strp, &rulep->r_day, 0, DAYSPERWEEK - 1);
+    } else if (isdigit (*strp)) {
+        /*
+         * Day of year.
+         */
+        rulep->r_type = DAY_OF_YEAR;
+        strp = getnum (strp, &rulep->r_day, 0, DAYSPERLYEAR - 1);
+    } else {
+        return NULL; /* invalid format */
+    }
+    if (strp == NULL) {
+        return NULL;
+    }
+    if (*strp == '/') {
+        /*
+         * Time specified.
+         */
+        ++strp;
+        strp = getsecs (strp, &rulep->r_time);
+    } else {
+        rulep->r_time = 2 * SECSPERHOUR; /* default = 2:00:00 */
+    }
+    return strp;
+}
+
+/*
+ * Parse POSIX section 8 TZ string.
+ * We keep the misnomer "name" for the timezone string.
+ */
+int tzparse (const char *name, struct tzoffset_info *tzo)
+{
+    const char *stdname;
+    const char *dstname;
+    size_t      stdlen;
+    size_t      dstlen;
+    long        stdoffset;
+    long        dstoffset;
+
+    dstname = NULL;
+    stdname = name;
+    name = egettzname (name, &stdlen, &stdname);
+    if (name == NULL || *name == '\0') {
+        return -1;
+    }
+    name = getoffset (name, &stdoffset);
+    if (name == NULL) {
+        return -1;
+    }
+    if (*name != '\0') {
+        name = egettzname (name, &dstlen, &dstname);
+        if (name == NULL) {
+            return -1;
+        }
+        if (*name != '\0' && *name != ',' && *name != ';') {
+            name = getoffset (name, &dstoffset);
+            if (name == NULL) {
+                return -1;
+            }
+        } else {
+            dstoffset = stdoffset - SECSPERHOUR;
+        }
+        if (*name == '\0') {
+            name = TZDEFRULESTRING;
+        }
+        if (*name == ',' || *name == ';') {
+            struct tzrule     start;
+            struct tzrule     end;
+            ++name;
+            if ((name = getrule (name, &start)) == NULL) {
+                return -1;
+            }
+            if (*name++ != ',') {
+                return -1;
+            }
+            if ((name = getrule (name, &end)) == NULL) {
+                return -1;
+            }
+            if (*name != '\0') {
+                return -1;
+            }
+            if (save_tznames (stdname, dstname, stdlen, dstlen, tzo) != 0) {
+                return -1;
+            }
+            tzo->start = start;
+            tzo->end   = end;
+            tzo->stdoffset = stdoffset;
+            tzo->dstoffset = dstoffset;
+        } else {
+            return -1;
+        }
+    } else {
+        /* only standard time, no DST */
+        if (save_tznames (stdname, NULL, stdlen, 0, tzo) != 0) {
+            return -1;
+        }
+        tzo->stdoffset = stdoffset;
+        tzo->dstoffset = stdoffset;
+    }
+    return 0;
+}
+
+/*
+ * Provide a single static timezone which is used by localtime et.al.
+ */
+int set_tz (const char *tzstring)
+{
+    return tzparse (tzstring, &localtime_tzoffset);
+}
+
+static size_t lensecs (long seconds)
+{
+    size_t len = 1;
+    long secs = abs (seconds);
+    if (seconds < 0) {
+        len++;
+    }
+    if (secs / 3600 > 9) {
+        len++;
+    }
+    if (secs % 3600) {
+        len += 3;
+        if (secs % 60) {
+            len += 3;
+        }
+    }
+    return len;
+}
+
+/*
+ * Get length of string resulting from serializing rule.
+ */
+static size_t lenrule (const struct tzrule *rule)
+{
+    size_t len = 0;
+    if (rule->r_type == JULIAN_DAY) {
+        len++;
+    }
+    if (rule->r_type == JULIAN_DAY || rule->r_type == DAY_OF_YEAR) {
+        len++;
+        if (rule->r_day > 9) {
+            len++;
+            if (rule->r_day > 99) {
+                len++;
+            }
+        }
+    } else if (rule->r_type == MONTH_NTH_DAY_OF_WEEK) {
+        len++;
+        len++;
+        if (rule->r_mon > 9) {
+            len++;
+        }
+        len += 4; /* dots and week/day */
+        if (rule->r_time != 7200) {
+            len++;
+            len += lensecs (rule->r_time);
+        }
+    }
+    return len;
+}
+
+static int is_extended_name (const char *name)
+{
+    int i;
+    for (i=0; name [i]; i++) {
+        if (isdigit (name [i]) || name [i] == '+' || name [i] == '-') {
+            return 1;
+        }
+    }
+    return 0;
+}
+
+/*
+ * Get length of timezone string resulting from serializing tzo.
+ */
+static size_t len_tz_r (const struct tzoffset_info *tzo)
+{
+    size_t len = 0;
+    if (tzo->stdname == NULL) {
+        return 0;
+    }
+    len = strlen (tzo->stdname);
+    if (is_extended_name (tzo->stdname)) {
+        len += 2;
+    }
+    len += lensecs (tzo->stdoffset);
+    if (tzo->dstname) {
+        len += strlen (tzo->dstname);
+        if (is_extended_name (tzo->dstname)) {
+            len += 2;
+        }
+        if (tzo->dstoffset - tzo->stdoffset != -3600) {
+            len += lensecs (tzo->dstoffset);
+        }
+        len += 2; /* commas */
+        len += lenrule (&tzo->start);
+        len += lenrule (&tzo->end);
+    }
+    return len;
+}
+
+size_t len_tz (void)
+{
+    return len_tz_r (&localtime_tzoffset);
+}
+
+void appendsecs (char *buf, long minutes)
+{
+    char *p = buf + strlen (buf);
+    long min = abs (minutes);
+    if (minutes < 0) {
+        *p++ = '-';
+    }
+    if (min % 3600 == 0) {
+        sprintf (p, "%ld", min / 3600);
+    } else if (min % 60 == 0) {
+        sprintf (p, "%ld:%ld", min / 3600, (min / 60) % 60);
+    } else {
+        sprintf (p, "%ld:%ld:%ld", min / 3600, (min / 60) % 60, min % 60);
+    }
+}
+
+void appendrule (char *buf, const struct tzrule *rule)
+{
+    char *p = buf + strlen (buf);
+    if (rule->r_type == JULIAN_DAY) {
+        sprintf (p, "J%d", rule->r_day);
+    } else if (rule->r_type == DAY_OF_YEAR) {
+        sprintf (p, "%d", rule->r_day);
+    } else if (rule->r_type == MONTH_NTH_DAY_OF_WEEK) {
+        sprintf (p, "M%d.%d.%d", rule->r_mon, rule->r_week, rule->r_day);
+        p = buf + strlen (buf);
+        if (rule->r_time != 7200) {
+            *p++ = '/';
+            *p = '\0';
+            appendsecs (p, rule->r_time);
+        }
+    }
+}
+
+const char *get_tz (char *buf, size_t buflen)
+{
+    const struct tzoffset_info *tzo = &localtime_tzoffset;
+
+    if (tzo->stdname == NULL || len_tz_r (tzo) > buflen) {
+        return NULL;
+    }
+    if (is_extended_name (tzo->stdname)) {
+        sprintf (buf, "<%s>", tzo->stdname);
+    } else {
+        strcpy (buf, tzo->stdname);
+    }
+    appendsecs (buf, tzo->stdoffset);
+    if (tzo->dstname != NULL) {
+        if (is_extended_name (tzo->dstname)) {
+            sprintf (buf + strlen (buf), "<%s>", tzo->dstname);
+        } else {
+            strcat (buf, tzo->dstname);
+        }
+        if (tzo->dstoffset - tzo->stdoffset != -3600) {
+            appendsecs (buf, tzo->dstoffset);
+        }
+        strcat (buf, ",");
+        appendrule (buf, &tzo->start);
+        strcat (buf, ",");
+        appendrule (buf, &tzo->end);
+    }
+    return buf;
+}
+
+
+/** @} */

apps/time/time_resource.h

@@ -0,0 +1,32 @@
+/**
+ * \addgroup Time related functions
+ *
+ * Resource definitions for time module
+ *
+ * @{
+ */
+
+/**
+ * \file
+ *         Resource definitions for the time module
+ *      
+ * \author
+ *         Ralf Schlatterbeck <rsc@tux.runtux.com>
+ */
+
+#ifndef time_resource_h
+#define time_resource_h
+#include <assert.h>
+#include "contiki.h"
+#include "rest-engine.h"
+
+extern resource_t res_timestamp;
+extern resource_t res_timezone;
+extern resource_t res_crontab;
+extern resource_t res_localtime;
+extern resource_t res_utc;
+
+extern void activate_cron_resources (void);
+
+#endif // time_resource_h
+/** @} */

apps/time/tzparse.h

@@ -0,0 +1,56 @@
+/*
+ * Timezone parsing
+ */
+
+/**
+ * \file
+ *         Definitions for timezone parsing
+ *      
+ * \author
+ *         Ralf Schlatterbeck <rsc@tux.runtux.com>
+ */
+
+#ifndef tzparse_h
+#define tzparse_h
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * Rule for DST switching
+ */
+struct tzrule {
+    int             r_type;         /* type of rule--see below */
+    int             r_day;          /* day number of rule */
+    int             r_week;         /* week number of rule */
+    int             r_mon;          /* month number of rule */
+    long            r_time;         /* transition time of rule */
+};
+
+#define JULIAN_DAY              0       /* Jn - Julian day */
+#define DAY_OF_YEAR             1       /* n - day of year */
+#define MONTH_NTH_DAY_OF_WEEK   2       /* Mm.n.d - month, week, day of week */
+
+/*
+ * Info about timezone offset handling.
+ * We get at least a dstname and stdoffset, if no daylight saving is in
+ * effect, dstname is NULL and no rule is filled in.
+ */
+struct tzoffset_info {
+    const char *stdname;
+    const char *dstname;
+    long stdoffset;
+    long dstoffset;
+    struct tzrule start;
+    struct tzrule end;
+    char namebuf [TZ_MAX_CHARS];
+};
+
+int tzparse (const char *name, struct tzoffset_info *tzo);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // tzparse_h

apps/time/xtime.h

@@ -0,0 +1,94 @@
+/**
+ * \defgroup Time related functions
+ *
+ * This rolls the necessary definition for getting/setting time and
+ * managing local time into one include file, on posix systems this
+ * lives in at least two include files, time.h and sys/time.h
+ *
+ * @{
+ */
+
+/**
+ * \file
+ *         Definitions for the time module
+ *      
+ * \author
+ *         Ralf Schlatterbeck <rsc@tux.runtux.com>
+ */
+
+#ifndef xtime_h
+#define xtime_h
+
+/* This is a time.h implementation but to avoid name-clashes with libs
+ * trying to be helpfull we add the prefix x
+ */
+
+#ifdef LOCAL_COMPILE
+#define clock_seconds() 1
+#define clock_time() 1
+#endif
+
+#define DEFAULT_TIMEZONE "CET-1CEST,M3.5.0,M10.5.0/3"
+
+typedef signed long long xtime_t;
+typedef signed long      suseconds_t;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* tm_gmtoff and tm_zone are BSD additions */
+struct xtm {
+    uint32_t    tm_year;        /* year */
+    uint16_t    tm_yday;        /* day in the year */
+    uint8_t     tm_sec;         /* seconds */
+    uint8_t     tm_min;         /* minutes */
+    uint8_t     tm_hour;        /* hours */
+    uint8_t     tm_mday;        /* day of the month */
+    uint8_t     tm_mon;         /* month */
+    uint8_t     tm_wday;        /* day of the week */
+    uint8_t     tm_isdst;       /* daylight saving time */
+    int32_t     tm_gmtoff;      /* Seconds east of UTC */
+    const char *tm_zone;        /* Timezone abbreviation */
+};
+
+struct xtimeval {
+    xtime_t     tv_sec;     /* seconds */
+    suseconds_t tv_usec;    /* microseconds */
+};
+
+struct timezone {
+    int16_t tz_minuteswest;     /* minutes west of Greenwich */
+    int     tz_dsttime;         /* type of DST correction, unused */
+};
+
+struct xtm *xgmtime      (const xtime_t *timep);
+struct xtm *xgmtime_r    (const xtime_t *timep, struct xtm *result);
+struct xtm *xlocaltime   (const xtime_t *timep);
+struct xtm *xlocaltime_r (const xtime_t *timep, struct xtm *result);
+
+int xgettimeofday       (struct xtimeval *tv, struct timezone *tz);
+int xsettimeofday       (const struct xtimeval *tv, const struct timezone *tz);
+
+/*
+ * Maximum length of all timezone names, this is much longer in UNIX
+ * implementations but we have limited space here. Note that the length
+ * includes a trailing \0 byte for each timezone name.
+ */
+#ifndef TZ_MAX_CHARS
+#define TZ_MAX_CHARS 16
+#endif
+
+/* Maximum length of buffer to reserve for timezone string */
+#define MAXTZLEN (TZ_MAX_CHARS+9+2*(2+6+1+8)+1)
+
+int set_tz (const char *tzstring);
+const char *get_tz (char *buffer, size_t buflen);
+size_t len_tz (void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // xtime_h
+/** @} */

apps/tinydtls

@@ -0,0 +1 @@
+Subproject commit e95b02584a0041817da67c8c01f2a197d0c26915

core/dev/serial-line.c

@@ -47,6 +47,8 @@
 
 #define IGNORE_CHAR(c) (c == 0x0d)
 #define END 0x0a
+//#define IGNORE_CHAR(c) (c == 0x0a)
+//#define END 0x0d
 
 static struct ringbuf rxbuf;
 static uint8_t rxbuf_data[BUFSIZE];

core/lib/settings.h

@@ -130,7 +130,7 @@ typedef uint16_t settings_length_t;
 
 #define SETTINGS_KEY_RDC_INDEX     TCC('R','D') /*!< RDC index, uint8_t */
 #define SETTINGS_KEY_CHANNEL_MASK  TCC('C','M') /*!< Channel mask, uint16_t */
-
+#define SETTINGS_KEY_MAC_CONF      TCC('M','C') /*!< MAC Layer Config, uint8_t */
 /*****************************************************************************/
 // MARK: - Constants
 

core/net/mac/contikimac/contikimac.c

@@ -365,6 +365,8 @@ powercycle_turn_radio_on(void)
   }
 }
 /*---------------------------------------------------------------------------*/
+volatile uint8_t mcusleepcycle=16;
+
 static void
 powercycle_wrapper(struct rtimer *t, void *ptr)
 {
@@ -479,8 +481,8 @@ powercycle(struct rtimer *t, void *ptr)
           break;
         }
 
-        schedule_powercycle(t, CCA_CHECK_TIME + CCA_SLEEP_TIME);
+      //  schedule_powercycle(t, CCA_CHECK_TIME + CCA_SLEEP_TIME);
-        PT_YIELD(&pt);
+      //  PT_YIELD(&pt);
       }
       if(radio_is_on) {
         if(!(NETSTACK_RADIO.receiving_packet() ||
@@ -500,14 +502,15 @@ powercycle(struct rtimer *t, void *ptr)
       ensure an occasional wake cycle or foreground processing will
       be blocked until a packet is detected */
 #if RDC_CONF_MCU_SLEEP
-
       static uint8_t sleepcycle;
-      if((sleepcycle++ < 16) && !we_are_sending && !radio_is_on) {
+      if((sleepcycle++ < mcusleepcycle) && !we_are_sending && !radio_is_on && !(NETSTACK_RADIO.receiving_packet() || NETSTACK_RADIO.pending_packet())) {
-        rtimer_arch_sleep(RTIMER_NOW() - cycle_start);
+          rtimer_arch_sleep(cycle_start - RTIMER_NOW());
       } else {
         sleepcycle = 0;
+#ifndef RDC_CONF_PT_YIELD_OFF
         schedule_powercycle_fixed(t, cycle_start);
         PT_YIELD(&pt);
+#endif
       }
 #else
       schedule_powercycle_fixed(t, cycle_start);
@@ -548,11 +551,11 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr,
   rtimer_clock_t t0;
 #if WITH_PHASE_OPTIMIZATION
   rtimer_clock_t encounter_time = 0;
+  uint8_t is_known_receiver = 0;
 #endif
   int strobes;
   uint8_t got_strobe_ack = 0;
   uint8_t is_broadcast = 0;
-  uint8_t is_known_receiver = 0;
   uint8_t collisions;
   int transmit_len;
   int ret;
@@ -712,11 +715,13 @@ send_packet(mac_callback_t mac_callback, void *mac_callback_ptr,
 
     watchdog_periodic();
 
+#if WITH_PHASE_OPTIMIZATION
     if(!is_broadcast && (is_receiver_awake || is_known_receiver) &&
        !RTIMER_CLOCK_LT(RTIMER_NOW(), t0 + MAX_PHASE_STROBE_TIME)) {
       PRINTF("miss to %d\n", packetbuf_addr(PACKETBUF_ADDR_RECEIVER)->u8[0]);
       break;
     }
+#endif /* WITH_PHASE_OPTIMIZATION */
 
 #if !RDC_CONF_HARDWARE_ACK
     len = 0;

core/sys/log-conf.h

@@ -0,0 +1,151 @@
+/*
+* Copyright (c) 2017, Inria.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * This file is part of the Contiki operating system.
+ *
+ */
+
+/**
+ * \file
+ *         Default log levels for a number of modules
+ * \author
+ *         Simon Duquennoy <simon.duquennoy@inria.fr>
+ */
+
+/** \addtogroup sys
+ * @{ */
+
+/** \addtogroup log
+* @{ */
+
+#ifndef __LOG_CONF_H__
+#define __LOG_CONF_H__
+
+/* Log only the last 16 bytes of link-layer and IPv6 addresses */
+#ifdef LOG_CONF_WITH_COMPACT_ADDR
+#define LOG_WITH_COMPACT_ADDR LOG_CONF_WITH_COMPACT_ADDR
+#else /* LOG_CONF_WITH_COMPACT_ADDR */
+#define LOG_WITH_COMPACT_ADDR 0
+#endif /* LOG_CONF_WITH_COMPACT_ADDR */
+
+/* Prefix all logs with file name and line-of-code */
+#ifdef LOG_CONF_WITH_LOC
+#define LOG_WITH_LOC LOG_CONF_WITH_LOC
+#else /* LOG_CONF_WITH_LOC */
+#define LOG_WITH_LOC 0
+#endif /* LOG_CONF_WITH_LOC */
+
+/* Prefix all logs with Module name and logging level */
+#ifdef LOG_CONF_WITH_MODULE_PREFIX
+#define LOG_WITH_MODULE_PREFIX LOG_CONF_WITH_MODULE_PREFIX
+#else /* LOG_CONF_WITH_MODULE_PREFIX */
+#define LOG_WITH_MODULE_PREFIX 1
+#endif /* LOG_CONF_WITH_MODULE_PREFIX */
+
+/* Cooja annotations */
+#ifdef LOG_CONF_WITH_ANNOTATE
+#define LOG_WITH_ANNOTATE LOG_CONF_WITH_ANNOTATE
+#else /* LOG_CONF_WITH_ANNOTATE */
+#define LOG_WITH_ANNOTATE 0
+#endif /* LOG_CONF_WITH_ANNOTATE */
+
+/* Custom output function -- default is printf */
+#ifdef LOG_CONF_OUTPUT
+#define LOG_OUTPUT(...) LOG_CONF_OUTPUT(__VA_ARGS__)
+#else /* LOG_CONF_OUTPUT */
+#define LOG_OUTPUT(...) printf(__VA_ARGS__)
+#endif /* LOG_CONF_OUTPUT */
+
+/*
+ * Custom output function to prefix logs with level and module.
+ *
+ * This will only be called when LOG_CONF_WITH_MODULE_PREFIX is enabled and
+ * all implementations should be based on LOG_OUTPUT.
+ *
+ * \param level     The log level
+ * \param levelstr  The log level as string
+ * \param module    The module string descriptor
+ */
+#ifdef LOG_CONF_OUTPUT_PREFIX
+#define LOG_OUTPUT_PREFIX(level, levelstr, module) LOG_CONF_OUTPUT_PREFIX(level, levelstr, module)
+#else /* LOG_CONF_OUTPUT_PREFIX */
+#define LOG_OUTPUT_PREFIX(level, levelstr, module) LOG_OUTPUT("[%-4s: %-10s] ", levelstr, module)
+#endif /* LOG_CONF_OUTPUT_PREFIX */
+
+/******************************************************************************/
+/********************* A list of currently supported modules ******************/
+/******************************************************************************/
+
+#ifndef LOG_CONF_LEVEL_RPL
+#define LOG_CONF_LEVEL_RPL                         LOG_LEVEL_NONE /* Only for rpl-lite */
+#endif /* LOG_CONF_LEVEL_RPL */
+
+#ifndef LOG_CONF_LEVEL_TCPIP
+#define LOG_CONF_LEVEL_TCPIP                       LOG_LEVEL_NONE
+#endif /* LOG_CONF_LEVEL_TCPIP */
+
+#ifndef LOG_CONF_LEVEL_IPV6
+#define LOG_CONF_LEVEL_IPV6                        LOG_LEVEL_NONE
+#endif /* LOG_CONF_LEVEL_IPV6 */
+
+#ifndef LOG_CONF_LEVEL_6LOWPAN
+#define LOG_CONF_LEVEL_6LOWPAN                     LOG_LEVEL_NONE
+#endif /* LOG_CONF_LEVEL_6LOWPAN */
+
+#ifndef LOG_CONF_LEVEL_NULLNET
+#define LOG_CONF_LEVEL_NULLNET                     LOG_LEVEL_NONE
+#endif /* LOG_CONF_LEVEL_NULLNET */
+
+#ifndef LOG_CONF_LEVEL_MAC
+#define LOG_CONF_LEVEL_MAC                         LOG_LEVEL_NONE
+#endif /* LOG_CONF_LEVEL_MAC */
+
+#ifndef LOG_CONF_LEVEL_FRAMER
+#define LOG_CONF_LEVEL_FRAMER                      LOG_LEVEL_NONE
+#endif /* LOG_CONF_LEVEL_FRAMER */
+
+#ifndef LOG_CONF_LEVEL_6TOP
+#define LOG_CONF_LEVEL_6TOP                        LOG_LEVEL_NONE
+#endif /* LOG_CONF_LEVEL_6TOP */
+
+#ifndef LOG_CONF_LEVEL_COAP
+#define LOG_CONF_LEVEL_COAP                        LOG_LEVEL_NONE
+#endif /* LOG_CONF_LEVEL_COAP */
+
+#ifndef LOG_CONF_LEVEL_LWM2M
+#define LOG_CONF_LEVEL_LWM2M                       LOG_LEVEL_NONE
+#endif /* LOG_CONF_LEVEL_LWM2M */
+
+#ifndef LOG_CONF_LEVEL_MAIN
+#define LOG_CONF_LEVEL_MAIN                        LOG_LEVEL_INFO
+#endif /* LOG_CONF_LEVEL_MAIN */
+
+#endif /* __LOG_CONF_H__ */
+
+/** @} */
+/** @} */

cpu/avr/Makefile.avr

@@ -12,8 +12,9 @@ CONTIKI_CPU=$(CONTIKI)/cpu/avr
 
 ### These directories will be searched for the specified source files
 ### TARGETLIBS are platform-specific routines in the contiki library path
-CONTIKI_CPU_DIRS            = . dev
+CONTIKI_CPU_DIRS            = . dev dev/arduino
-AVR        = clock.c mtarch.c eeprom.c flash.c rs232.c leds-arch.c watchdog.c rtimer-arch.c bootloader.c
+AVR        = clock.c mtarch.c eeprom.c flash.c rs232.c leds-arch.c \
+             watchdog.c rtimer-arch.c bootloader.c
 ELFLOADER  = elfloader.c elfloader-avr.c symtab-avr.c
 TARGETLIBS = random.c leds.c
 
@@ -88,6 +89,7 @@ CONTIKI_SOURCEFILES        += $(CONTIKI_TARGET_SOURCEFILES)
 
 ### Compiler definitions
 CC       = avr-gcc
+CXX      = avr-g++
 LD       = avr-gcc
 AS       = avr-as
 AR       = avr-ar
@@ -129,6 +131,12 @@ $(OBJECTDIR)/%.o: %.c | $(OBJECTDIR)
 %.o: %.c
 	$(CC) $(CFLAGS) -c $< -o $@
 
+$(OBJECTDIR)/%.o: %.cpp | $(OBJECTDIR)
+	$(CXX) $(CFLAGS) -c $< -o $@
+
+%.o: %.cpp
+	$(CXX) $(CFLAGS) -c $< -o $@
+
 %.ko: %.o
 	$(STRIP) -K _init -K _fini --strip-unneeded -g -x $< -o $@
 
@@ -194,22 +202,18 @@ endif
 ### Upload image
 #Let avrdude use defaults if port or programmer not defined
 AVRDUDE ?= avrdude
-ifdef AVRDUDE_PORT
- AVRDUDE_PORT:=-P $(AVRDUDE_PORT)
-endif
-ifdef AVRDUDE_PROGRAMMER
- AVRDUDE_PROGRAMMER:=-c $(AVRDUDE_PROGRAMMER)
-endif
 ifdef AVRDUDE_MCU
- AVRDUDE_MCU:=-p $(AVRDUDE_MCU)
+ DUDE_MCU:=-p $(AVRDUDE_MCU)
 else
- AVRDUDE_MCU:=-p $(MCU)
+ DUDE_MCU:=-p $(MCU)
 endif
 %.u: %.hex
-	$(AVRDUDE) $(AVRDUDE_MCU) $(AVRDUDE_OPTIONS) $(AVRDUDE_PORT) $(AVRDUDE_PROGRAMMER) -U flash:w:$<
+	$(AVRDUDE) $(DUDE_MCU) $(AVRDUDE_OPTIONS) -P $(AVRDUDE_PORT) \
+        -c $(AVRDUDE_PROGRAMMER) -U flash:w:$<:i
 
 %.eu: %.eep
-	$(AVRDUDE) $(AVRDUDE_MCU) ${AVRDUDE_OPTIONS} ${AVRDUDE_PORT} ${AVRDUDE_PROGRAMMER} -U eeprom:w:$<
+	$(AVRDUDE) $(DUDE_MCU) ${AVRDUDE_OPTIONS} -P ${AVRDUDE_PORT} \
+        -c ${AVRDUDE_PROGRAMMER} -U eeprom:w:$<:i
 
 symbols.c:
 	cp ${CONTIKI}/tools/empty-symbols.c symbols.c

cpu/avr/dev/adc.c

@@ -0,0 +1,84 @@
+/*
+* Copyright (c) 2012, BinaryLabs.
+* All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions
+* are met:
+* 1. Redistributions of source code must retain the above copyright
+* notice, this list of conditions and the following disclaimer.
+* 2. Redistributions in binary form must reproduce the above copyright
+* notice, this list of conditions and the following disclaimer in the
+* documentation and/or other materials provided with the distribution.
+* 3. Neither the name of the Institute nor the names of its contributors
+* may be used to endorse or promote products derived from this software
+* without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+* SUCH DAMAGE.
+*
+* @(#)$Id: adc.c,v 1.1 2010/08/25 19:34:06 nifi Exp $
+*/
+
+/**
+* \file
+* ADC file for Atmega128rfa1.
+* \author
+* Paulo Louro <paulolouro@binarylabs.dk>
+*/
+
+#include "adc.h"
+
+static uint8_t analog_reference = ADC_DEFAULT;
+
+/*
+ * For arduino interface for setting external reference voltage
+ * Note that applying an external voltage *and* then setting the analog
+ * reference to something internal will short the internal and the
+ * external reference voltage and most likely destroy the processor.
+ */
+void analogReference(uint8_t mode)
+{
+    analog_reference = mode;
+}
+
+int readADC(uint8_t pin)
+{
+  int result = 0;
+
+  adc_setup (analog_reference, pin);
+  result = adc_read ();
+  adc_fin ();
+  return result;
+}
+
+/**
+* \return Internal temperature in 0.01C, e.g. 25C is 2500
+*/
+int readInternalTemp(void)
+{
+  int reading = 0;
+
+  ADCSRB |= _BV(MUX5);
+  ADMUX = _BV(REFS1) | _BV(REFS0) | 0b1001 ;
+  ADCSRA = _BV(ADEN) | _BV(ADPS0) | _BV(ADPS2) ;
+
+  ADCSRA |= 1 << ADSC;
+  loop_until_bit_is_clear(ADCSRA,ADSC);
+  reading = ADC;
+
+  ADCSRB=0; //disable ADC, need to write B first for MUX5 bit
+  ADCSRA=0; //disable ADC
+  ADMUX=0; //turn off internal vref
+
+  return reading * 113 - 27280;
+}

cpu/avr/dev/adc.h

@@ -0,0 +1,65 @@
+#ifndef __ADC_ARCH_H__
+#define __ADC_ARCH_H__
+
+#include <avr/io.h>
+
+/*
+ * Reference voltage
+ * The default is 1.6V reference voltage
+ * The selected reference voltage is the maximum voltage that can be
+ * measured.
+ * Directly provide shifted variants so we don't need to shift.
+ */
+#define ADC_1_5      (2<<6)
+#define ADC_1_6      (3<<6)
+#define ADC_1_8      (1<<6)
+#define ADC_EXTERNAL (0<<6)
+#define ADC_DEFAULT  ADC_1_6
+
+/* sometimes it's desirable to decouple setup / finish from sampling */
+
+static inline void adc_setup (uint8_t ref_volt, uint8_t pin)
+{
+  ADMUX = ref_volt | (pin & 0x7);
+  ADCSRA = _BV(ADEN) | _BV(ADPS0) | _BV(ADPS2);
+}
+
+static inline int adc_read (void)
+{
+  ADCSRA |= (1 << ADSC);
+  loop_until_bit_is_clear (ADCSRA, ADSC);
+  return ADC;
+}
+
+static inline void adc_fin (void)
+{
+    ADCSRA = 0;
+    ADMUX  = 0;
+}
+  
+static inline void adc_init (void)
+{
+    uint8_t temp;
+    ADCSRC = 0;
+    ADCSRB = 0;
+    adc_fin ();
+    /*
+     * Disable JTAG interface
+     * Hardware manual about JTD bit:
+     * "In order to avoid unintentional disabling or enabling of the
+     * JTAG interface, a timed sequence must be followed when changing
+     * this bit: The application software must write this bit to the
+     * desired value twice within four cycles to change its value."
+     * 15.4.1 "MCUCR - MCU Control Register", p. 219
+     */
+    temp = MCUCR | (1 << JTD);
+    MCUCR = temp;
+    MCUCR = temp;
+}
+
+int readADC(uint8_t pin);
+long readVcc();
+int readInternalTemp(void);
+void analogReference(uint8_t mode);
+
+#endif /* __ADC_ARCH_H__ */

cpu/avr/dev/arduino/Arduino.h

@@ -0,0 +1,174 @@
+#ifndef Arduino_h
+#define Arduino_h
+
+#include <hw-arduino.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+
+#include <avr/pgmspace.h>
+#include <avr/io.h>
+#include <avr/interrupt.h>
+
+#include "binary.h"
+
+#ifdef __cplusplus
+extern "C"{
+#endif
+
+#define HIGH 0x1
+#define LOW  0x0
+
+#define INPUT 0x0
+#define OUTPUT 0x1
+#define INPUT_PULLUP 0x2
+
+#define true 0x1
+#define false 0x0
+
+#define PI 3.1415926535897932384626433832795
+#define HALF_PI 1.5707963267948966192313216916398
+#define TWO_PI 6.283185307179586476925286766559
+#define DEG_TO_RAD 0.017453292519943295769236907684886
+#define RAD_TO_DEG 57.295779513082320876798154814105
+
+#define SERIAL  0x0
+#define DISPLAY 0x1
+
+#define LSBFIRST 0
+#define MSBFIRST 1
+
+#define CHANGE 1
+#define FALLING 2
+#define RISING 3
+
+#define DEFAULT  ADC_DEFAULT
+#define EXTERNAL ADC_EXTERNAL
+
+// undefine stdlib's abs if encountered
+#ifdef abs
+#undef abs
+#endif
+
+#define min(a,b) ((a)<(b)?(a):(b))
+#define max(a,b) ((a)>(b)?(a):(b))
+#define abs(x) ((x)>0?(x):-(x))
+#define constrain(amt,low,high) ((amt)<(low)?(low):((amt)>(high)?(high):(amt)))
+#define round(x)     ((x)>=0?(long)((x)+0.5):(long)((x)-0.5))
+#define radians(deg) ((deg)*DEG_TO_RAD)
+#define degrees(rad) ((rad)*RAD_TO_DEG)
+#define sq(x) ((x)*(x))
+
+#define interrupts() sei()
+#define noInterrupts() cli()
+
+#define lowByte(w) ((uint8_t) ((w) & 0xff))
+#define highByte(w) ((uint8_t) ((w) >> 8))
+
+#define bitRead(value, bit) (((value) >> (bit)) & 0x01)
+#define bitSet(value, bit) ((value) |= (1UL << (bit)))
+#define bitClear(value, bit) ((value) &= ~(1UL << (bit)))
+#define bitWrite(value, bit, bitvalue) (bitvalue ? bitSet(value, bit) : bitClear(value, bit))
+
+#define clockCyclesPerMicrosecond()  ( F_CPU / 1000000L )
+#define microsecondsToClockCycles(a) ( (a) * (F_CPU / 1000000L) )
+
+typedef unsigned int word;
+
+#define bit(b) (1UL << (b))
+
+typedef uint8_t boolean;
+typedef uint8_t byte;
+
+void pinMode(uint8_t, uint8_t);
+void digitalWrite(uint8_t, uint8_t);
+int digitalRead(uint8_t);
+
+unsigned long pulseIn(uint8_t pin, uint8_t state, unsigned long timeout);
+
+void shiftOut(uint8_t dataPin, uint8_t clockPin, uint8_t bitOrder, uint8_t val);
+uint8_t shiftIn(uint8_t dataPin, uint8_t clockPin, uint8_t bitOrder);
+
+void attachInterrupt(uint8_t, void (*)(void), int mode);
+void detachInterrupt(uint8_t);
+
+void setup(void);
+void loop(void);
+
+// Get the bit location within the hardware port of the given virtual pin.
+// This comes from the pins_*.c file for the active board configuration.
+
+#define analogInPinToBit(P) (P)
+
+// On the ATmega1280, the addresses of some of the port registers are
+// greater than 255, so we can't store them in uint8_t's.
+extern const uint16_t PROGMEM port_to_mode_PGM[];
+extern const uint16_t PROGMEM port_to_input_PGM[];
+extern const uint16_t PROGMEM port_to_output_PGM[];
+
+extern const uint8_t PROGMEM digital_pin_to_port_PGM[];
+// extern const uint8_t PROGMEM digital_pin_to_bit_PGM[];
+extern const uint8_t PROGMEM digital_pin_to_bit_mask_PGM[];
+
+// Get the bit location within the hardware port of the given virtual pin.
+// This comes from the pins_*.c file for the active board configuration.
+// 
+// These perform slightly better as macros compared to inline functions
+//
+#define digitalPinToPort(P) ( pgm_read_byte( digital_pin_to_port_PGM + (P) ) )
+#define digitalPinToBitMask(P) ( pgm_read_byte( digital_pin_to_bit_mask_PGM + (P) ) )
+#define analogInPinToBit(P) (P)
+#define portOutputRegister(P) ( (volatile uint8_t *)( pgm_read_word( port_to_output_PGM + (P))) )
+#define portInputRegister(P) ( (volatile uint8_t *)( pgm_read_word( port_to_input_PGM + (P))) )
+#define portModeRegister(P) ( (volatile uint8_t *)( pgm_read_word( port_to_mode_PGM + (P))) )
+
+#define NOT_A_PIN 0
+#define NOT_A_PORT 0
+
+#ifdef ARDUINO_MAIN
+#define PA 1
+#define PB 2
+#define PC 3
+#define PD 4
+#define PE 5
+#define PF 6
+#define PG 7
+#define PH 8
+#define PJ 10
+#define PK 11
+#define PL 12
+#endif
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#ifdef __cplusplus
+// look at this again when considering implementing serial
+#include "WCharacter.h"
+#include "WString.h"
+#include "HardwareSerial.h"
+
+uint16_t makeWord(uint16_t w);
+uint16_t makeWord(byte h, byte l);
+
+#define word(...) makeWord(__VA_ARGS__)
+
+unsigned long pulseIn(uint8_t pin, uint8_t state, unsigned long timeout = 1000000L);
+
+void tone(uint8_t _pin, unsigned int frequency, unsigned long duration = 0);
+void noTone(uint8_t _pin);
+
+// WMath prototypes
+long random(long);
+long random(long, long);
+void randomSeed(unsigned int);
+long map(long, long, long, long, long);
+
+#endif
+
+#include "pins_arduino.h"
+
+#include "dev/arduino/arduino-compat.h"
+
+#endif

cpu/avr/dev/arduino/EEPROM.h

@@ -0,0 +1,146 @@
+/*
+  EEPROM.h - EEPROM library
+  Original Copyright (c) 2006 David A. Mellis.  All right reserved.
+  New version by Christopher Andrews 2015.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#ifndef EEPROM_h
+#define EEPROM_h
+
+#include <inttypes.h>
+#include <avr/eeprom.h>
+#include <avr/io.h>
+
+/***
+    EERef class.
+    
+    This object references an EEPROM cell.
+    Its purpose is to mimic a typical byte of RAM, however its storage is the EEPROM.
+    This class has an overhead of two bytes, similar to storing a pointer to an EEPROM cell.
+***/
+
+struct EERef{
+
+    EERef( const int index )
+        : index( index )                 {}
+    
+    //Access/read members.
+    uint8_t operator*() const            { return eeprom_read_byte( (uint8_t*) index ); }
+    operator const uint8_t() const       { return **this; }
+    
+    //Assignment/write members.
+    EERef &operator=( const EERef &ref ) { return *this = *ref; }
+    EERef &operator=( uint8_t in )       { return eeprom_write_byte( (uint8_t*) index, in ), *this;  }
+    EERef &operator +=( uint8_t in )     { return *this = **this + in; }
+    EERef &operator -=( uint8_t in )     { return *this = **this - in; }
+    EERef &operator *=( uint8_t in )     { return *this = **this * in; }
+    EERef &operator /=( uint8_t in )     { return *this = **this / in; }
+    EERef &operator ^=( uint8_t in )     { return *this = **this ^ in; }
+    EERef &operator %=( uint8_t in )     { return *this = **this % in; }
+    EERef &operator &=( uint8_t in )     { return *this = **this & in; }
+    EERef &operator |=( uint8_t in )     { return *this = **this | in; }
+    EERef &operator <<=( uint8_t in )    { return *this = **this << in; }
+    EERef &operator >>=( uint8_t in )    { return *this = **this >> in; }
+    
+    EERef &update( uint8_t in )          { return  in != *this ? *this = in : *this; }
+    
+    /** Prefix increment/decrement **/
+    EERef& operator++()                  { return *this += 1; }
+    EERef& operator--()                  { return *this -= 1; }
+    
+    /** Postfix increment/decrement **/
+    uint8_t operator++ (int){ 
+        uint8_t ret = **this;
+        return ++(*this), ret;
+    }
+
+    uint8_t operator-- (int){ 
+        uint8_t ret = **this;
+        return --(*this), ret;
+    }
+    
+    int index; //Index of current EEPROM cell.
+};
+
+/***
+    EEPtr class.
+    
+    This object is a bidirectional pointer to EEPROM cells represented by EERef objects.
+    Just like a normal pointer type, this can be dereferenced and repositioned using 
+    increment/decrement operators.
+***/
+
+struct EEPtr{
+
+    EEPtr( const int index )
+        : index( index )                {}
+        
+    operator const int() const          { return index; }
+    EEPtr &operator=( int in )          { return index = in, *this; }
+    
+    //Iterator functionality.
+    bool operator!=( const EEPtr &ptr ) { return index != ptr.index; }
+    EERef operator*()                   { return index; }
+    
+    /** Prefix & Postfix increment/decrement **/
+    EEPtr& operator++()                 { return ++index, *this; }
+    EEPtr& operator--()                 { return --index, *this; }
+    EEPtr operator++ (int)              { return index++; }
+    EEPtr operator-- (int)              { return index--; }
+
+    int index; //Index of current EEPROM cell.
+};
+
+/***
+    EEPROMClass class.
+    
+    This object represents the entire EEPROM space.
+    It wraps the functionality of EEPtr and EERef into a basic interface.
+    This class is also 100% backwards compatible with earlier Arduino core releases.
+***/
+
+struct EEPROMClass{
+
+    //Basic user access methods.
+    EERef operator[]( const int idx )    { return idx; }
+    uint8_t read( int idx )              { return EERef( idx ); }
+    void write( int idx, uint8_t val )   { (EERef( idx )) = val; }
+    void update( int idx, uint8_t val )  { EERef( idx ).update( val ); }
+    
+    //STL and C++11 iteration capability.
+    EEPtr begin()                        { return 0x00; }
+    EEPtr end()                          { return length(); } //Standards requires this to be the item after the last valid entry. The returned pointer is invalid.
+    uint16_t length()                    { return E2END + 1; }
+    
+    //Functionality to 'get' and 'put' objects to and from EEPROM.
+    template< typename T > T &get( int idx, T &t ){
+        EEPtr e = idx;
+        uint8_t *ptr = (uint8_t*) &t;
+        for( int count = sizeof(T) ; count ; --count, ++e )  *ptr++ = *e;
+        return t;
+    }
+    
+    template< typename T > const T &put( int idx, const T &t ){
+        EEPtr e = idx;
+        const uint8_t *ptr = (const uint8_t*) &t;
+        for( int count = sizeof(T) ; count ; --count, ++e )  (*e).update( *ptr++ );
+        return t;
+    }
+};
+
+static EEPROMClass EEPROM;
+#endif

cpu/avr/dev/arduino/HardwareSerial.cpp

@@ -0,0 +1,250 @@
+/*
+  HardwareSerial.cpp - Hardware serial library for Wiring
+  Copyright (c) 2006 Nicholas Zambetti.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+  
+  Modified 23 November 2006 by David A. Mellis
+  Modified 28 September 2010 by Mark Sproul
+  Modified 14 August 2012 by Alarus
+  Modified 3 December 2013 by Matthijs Kooijman
+*/
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <inttypes.h>
+#include "Arduino.h"
+
+#include "HardwareSerial.h"
+#include "HardwareSerial_private.h"
+
+// this next line disables the entire HardwareSerial.cpp, 
+// this is so I can support Attiny series and any other chip without a uart
+#if defined(HAVE_HWSERIAL0) || defined(HAVE_HWSERIAL1) || defined(HAVE_HWSERIAL2) || defined(HAVE_HWSERIAL3)
+
+// SerialEvent functions are weak, so when the user doesn't define them,
+// the linker just sets their address to 0 (which is checked below).
+// The Serialx_available is just a wrapper around Serialx.available(),
+// but we can refer to it weakly so we don't pull in the entire
+// HardwareSerial instance if the user doesn't also refer to it.
+#if defined(HAVE_HWSERIAL0)
+  void serialEvent() __attribute__((weak));
+  bool Serial0_available() __attribute__((weak));
+#endif
+
+#if defined(HAVE_HWSERIAL1)
+  void serialEvent1() __attribute__((weak));
+  bool Serial1_available() __attribute__((weak));
+#endif
+
+#if defined(HAVE_HWSERIAL2)
+  void serialEvent2() __attribute__((weak));
+  bool Serial2_available() __attribute__((weak));
+#endif
+
+#if defined(HAVE_HWSERIAL3)
+  void serialEvent3() __attribute__((weak));
+  bool Serial3_available() __attribute__((weak));
+#endif
+
+void serialEventRun(void)
+{
+#if defined(HAVE_HWSERIAL0)
+  if (Serial0_available && serialEvent && Serial0_available()) serialEvent();
+#endif
+#if defined(HAVE_HWSERIAL1)
+  if (Serial1_available && serialEvent1 && Serial1_available()) serialEvent1();
+#endif
+#if defined(HAVE_HWSERIAL2)
+  if (Serial2_available && serialEvent2 && Serial2_available()) serialEvent2();
+#endif
+#if defined(HAVE_HWSERIAL3)
+  if (Serial3_available && serialEvent3 && Serial3_available()) serialEvent3();
+#endif
+}
+
+// Actual interrupt handlers //////////////////////////////////////////////////////////////
+
+void HardwareSerial::_tx_udr_empty_irq(void)
+{
+  // If interrupts are enabled, there must be more data in the output
+  // buffer. Send the next byte
+  unsigned char c = _tx_buffer[_tx_buffer_tail];
+  _tx_buffer_tail = (_tx_buffer_tail + 1) % SERIAL_TX_BUFFER_SIZE;
+
+  *_udr = c;
+
+  // clear the TXC bit -- "can be cleared by writing a one to its bit
+  // location". This makes sure flush() won't return until the bytes
+  // actually got written
+  sbi(*_ucsra, TXC0);
+
+  if (_tx_buffer_head == _tx_buffer_tail) {
+    // Buffer empty, so disable interrupts
+    cbi(*_ucsrb, UDRIE0);
+  }
+}
+
+// Public Methods //////////////////////////////////////////////////////////////
+
+void HardwareSerial::begin(unsigned long baud, byte config)
+{
+  // Try u2x mode first
+  uint16_t baud_setting = (F_CPU / 4 / baud - 1) / 2;
+  *_ucsra = 1 << U2X0;
+
+  // hardcoded exception for 57600 for compatibility with the bootloader
+  // shipped with the Duemilanove and previous boards and the firmware
+  // on the 8U2 on the Uno and Mega 2560. Also, The baud_setting cannot
+  // be > 4095, so switch back to non-u2x mode if the baud rate is too
+  // low.
+  if (((F_CPU == 16000000UL) && (baud == 57600)) || (baud_setting >4095))
+  {
+    *_ucsra = 0;
+    baud_setting = (F_CPU / 8 / baud - 1) / 2;
+  }
+
+  // assign the baud_setting, a.k.a. ubrr (USART Baud Rate Register)
+  *_ubrrh = baud_setting >> 8;
+  *_ubrrl = baud_setting;
+
+  _written = false;
+
+  //set the data bits, parity, and stop bits
+#if defined(__AVR_ATmega8__)
+  config |= 0x80; // select UCSRC register (shared with UBRRH)
+#endif
+  *_ucsrc = config;
+  
+  sbi(*_ucsrb, RXEN0);
+  sbi(*_ucsrb, TXEN0);
+  sbi(*_ucsrb, RXCIE0);
+  cbi(*_ucsrb, UDRIE0);
+}
+
+void HardwareSerial::end()
+{
+  // wait for transmission of outgoing data
+  flush();
+
+  cbi(*_ucsrb, RXEN0);
+  cbi(*_ucsrb, TXEN0);
+  cbi(*_ucsrb, RXCIE0);
+  cbi(*_ucsrb, UDRIE0);
+  
+  // clear any received data
+  _rx_buffer_head = _rx_buffer_tail;
+}
+
+int HardwareSerial::available(void)
+{
+  return ((unsigned int)(SERIAL_RX_BUFFER_SIZE + _rx_buffer_head - _rx_buffer_tail)) % SERIAL_RX_BUFFER_SIZE;
+}
+
+int HardwareSerial::peek(void)
+{
+  if (_rx_buffer_head == _rx_buffer_tail) {
+    return -1;
+  } else {
+    return _rx_buffer[_rx_buffer_tail];
+  }
+}
+
+int HardwareSerial::read(void)
+{
+  // if the head isn't ahead of the tail, we don't have any characters
+  if (_rx_buffer_head == _rx_buffer_tail) {
+    return -1;
+  } else {
+    unsigned char c = _rx_buffer[_rx_buffer_tail];
+    _rx_buffer_tail = (rx_buffer_index_t)(_rx_buffer_tail + 1) % SERIAL_RX_BUFFER_SIZE;
+    return c;
+  }
+}
+
+int HardwareSerial::availableForWrite(void)
+{
+#if (SERIAL_TX_BUFFER_SIZE>256)
+  uint8_t oldSREG = SREG;
+  cli();
+#endif
+  tx_buffer_index_t head = _tx_buffer_head;
+  tx_buffer_index_t tail = _tx_buffer_tail;
+#if (SERIAL_TX_BUFFER_SIZE>256)
+  SREG = oldSREG;
+#endif
+  if (head >= tail) return SERIAL_TX_BUFFER_SIZE - 1 - head + tail;
+  return tail - head - 1;
+}
+
+void HardwareSerial::flush()
+{
+  // If we have never written a byte, no need to flush. This special
+  // case is needed since there is no way to force the TXC (transmit
+  // complete) bit to 1 during initialization
+  if (!_written)
+    return;
+
+  while (bit_is_set(*_ucsrb, UDRIE0) || bit_is_clear(*_ucsra, TXC0)) {
+    if (bit_is_clear(SREG, SREG_I) && bit_is_set(*_ucsrb, UDRIE0))
+	// Interrupts are globally disabled, but the DR empty
+	// interrupt should be enabled, so poll the DR empty flag to
+	// prevent deadlock
+	if (bit_is_set(*_ucsra, UDRE0))
+	  _tx_udr_empty_irq();
+  }
+  // If we get here, nothing is queued anymore (DRIE is disabled) and
+  // the hardware finished tranmission (TXC is set).
+}
+
+size_t HardwareSerial::write(uint8_t c)
+{
+  _written = true;
+  // If the buffer and the data register is empty, just write the byte
+  // to the data register and be done. This shortcut helps
+  // significantly improve the effective datarate at high (>
+  // 500kbit/s) bitrates, where interrupt overhead becomes a slowdown.
+  if (_tx_buffer_head == _tx_buffer_tail && bit_is_set(*_ucsra, UDRE0)) {
+    *_udr = c;
+    sbi(*_ucsra, TXC0);
+    return 1;
+  }
+  tx_buffer_index_t i = (_tx_buffer_head + 1) % SERIAL_TX_BUFFER_SIZE;
+	
+  // If the output buffer is full, there's nothing for it other than to 
+  // wait for the interrupt handler to empty it a bit
+  while (i == _tx_buffer_tail) {
+    if (bit_is_clear(SREG, SREG_I)) {
+      // Interrupts are disabled, so we'll have to poll the data
+      // register empty flag ourselves. If it is set, pretend an
+      // interrupt has happened and call the handler to free up
+      // space for us.
+      if(bit_is_set(*_ucsra, UDRE0))
+	_tx_udr_empty_irq();
+    } else {
+      // nop, the interrupt handler will free up space for us
+    }
+  }
+
+  _tx_buffer[_tx_buffer_head] = c;
+  _tx_buffer_head = i;
+	
+  sbi(*_ucsrb, UDRIE0);
+  
+  return 1;
+}
+
+#endif // whole file

cpu/avr/dev/arduino/HardwareSerial.h

@@ -0,0 +1,161 @@
+/*
+  HardwareSerial.h - Hardware serial library for Wiring
+  Copyright (c) 2006 Nicholas Zambetti.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+  Modified 28 September 2010 by Mark Sproul
+  Modified 14 August 2012 by Alarus
+  Modified 3 December 2013 by Matthijs Kooijman
+*/
+
+#ifndef HardwareSerial_h
+#define HardwareSerial_h
+
+#include <inttypes.h>
+
+#include "Stream.h"
+
+// Define constants and variables for buffering incoming serial data.  We're
+// using a ring buffer (I think), in which head is the index of the location
+// to which to write the next incoming character and tail is the index of the
+// location from which to read.
+// NOTE: a "power of 2" buffer size is reccomended to dramatically
+//       optimize all the modulo operations for ring buffers.
+// WARNING: When buffer sizes are increased to > 256, the buffer index
+// variables are automatically increased in size, but the extra
+// atomicity guards needed for that are not implemented. This will
+// often work, but occasionally a race condition can occur that makes
+// Serial behave erratically. See https://github.com/arduino/Arduino/issues/2405
+#if !defined(SERIAL_TX_BUFFER_SIZE)
+#if ((RAMEND - RAMSTART) < 1023)
+#define SERIAL_TX_BUFFER_SIZE 16
+#else
+#define SERIAL_TX_BUFFER_SIZE 64
+#endif
+#endif
+#if !defined(SERIAL_RX_BUFFER_SIZE)
+#if ((RAMEND - RAMSTART) < 1023)
+#define SERIAL_RX_BUFFER_SIZE 16
+#else
+#define SERIAL_RX_BUFFER_SIZE 64
+#endif
+#endif
+#if (SERIAL_TX_BUFFER_SIZE>256)
+typedef uint16_t tx_buffer_index_t;
+#else
+typedef uint8_t tx_buffer_index_t;
+#endif
+#if  (SERIAL_RX_BUFFER_SIZE>256)
+typedef uint16_t rx_buffer_index_t;
+#else
+typedef uint8_t rx_buffer_index_t;
+#endif
+
+// Define config for Serial.begin(baud, config);
+#define SERIAL_5N1 0x00
+#define SERIAL_6N1 0x02
+#define SERIAL_7N1 0x04
+#define SERIAL_8N1 0x06
+#define SERIAL_5N2 0x08
+#define SERIAL_6N2 0x0A
+#define SERIAL_7N2 0x0C
+#define SERIAL_8N2 0x0E
+#define SERIAL_5E1 0x20
+#define SERIAL_6E1 0x22
+#define SERIAL_7E1 0x24
+#define SERIAL_8E1 0x26
+#define SERIAL_5E2 0x28
+#define SERIAL_6E2 0x2A
+#define SERIAL_7E2 0x2C
+#define SERIAL_8E2 0x2E
+#define SERIAL_5O1 0x30
+#define SERIAL_6O1 0x32
+#define SERIAL_7O1 0x34
+#define SERIAL_8O1 0x36
+#define SERIAL_5O2 0x38
+#define SERIAL_6O2 0x3A
+#define SERIAL_7O2 0x3C
+#define SERIAL_8O2 0x3E
+
+class HardwareSerial : public Stream
+{
+  protected:
+    volatile uint8_t * const _ubrrh;
+    volatile uint8_t * const _ubrrl;
+    volatile uint8_t * const _ucsra;
+    volatile uint8_t * const _ucsrb;
+    volatile uint8_t * const _ucsrc;
+    volatile uint8_t * const _udr;
+    // Has any byte been written to the UART since begin()
+    bool _written;
+
+    volatile rx_buffer_index_t _rx_buffer_head;
+    volatile rx_buffer_index_t _rx_buffer_tail;
+    volatile tx_buffer_index_t _tx_buffer_head;
+    volatile tx_buffer_index_t _tx_buffer_tail;
+
+    // Don't put any members after these buffers, since only the first
+    // 32 bytes of this struct can be accessed quickly using the ldd
+    // instruction.
+    unsigned char _rx_buffer[SERIAL_RX_BUFFER_SIZE];
+    unsigned char _tx_buffer[SERIAL_TX_BUFFER_SIZE];
+
+  public:
+    inline HardwareSerial(
+      volatile uint8_t *ubrrh, volatile uint8_t *ubrrl,
+      volatile uint8_t *ucsra, volatile uint8_t *ucsrb,
+      volatile uint8_t *ucsrc, volatile uint8_t *udr);
+    void begin(unsigned long baud) { begin(baud, SERIAL_8N1); }
+    void begin(unsigned long, uint8_t);
+    void end();
+    virtual int available(void);
+    virtual int peek(void);
+    virtual int read(void);
+    int availableForWrite(void);
+    virtual void flush(void);
+    virtual size_t write(uint8_t);
+    inline size_t write(unsigned long n) { return write((uint8_t)n); }
+    inline size_t write(long n) { return write((uint8_t)n); }
+    inline size_t write(unsigned int n) { return write((uint8_t)n); }
+    inline size_t write(int n) { return write((uint8_t)n); }
+    using Print::write; // pull in write(str) and write(buf, size) from Print
+    operator bool() { return true; }
+
+    // Interrupt handlers - Not intended to be called externally
+    inline void _rx_complete_irq(void);
+    void _tx_udr_empty_irq(void);
+};
+
+#if defined(UBRRH) || defined(UBRR0H)
+  extern HardwareSerial Serial;
+  #define HAVE_HWSERIAL0
+#endif
+#if defined(UBRR1H)
+  extern HardwareSerial Serial1;
+  #define HAVE_HWSERIAL1
+#endif
+#if defined(UBRR2H)
+  extern HardwareSerial Serial2;
+  #define HAVE_HWSERIAL2
+#endif
+#if defined(UBRR3H)
+  extern HardwareSerial Serial3;
+  #define HAVE_HWSERIAL3
+#endif
+
+extern void serialEventRun(void) __attribute__((weak));
+
+#endif

cpu/avr/dev/arduino/HardwareSerial0.cpp

@@ -0,0 +1,79 @@
+/*
+  HardwareSerial0.cpp - Hardware serial library for Wiring
+  Copyright (c) 2006 Nicholas Zambetti.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+  Modified 23 November 2006 by David A. Mellis
+  Modified 28 September 2010 by Mark Sproul
+  Modified 14 August 2012 by Alarus
+  Modified 3 December 2013 by Matthijs Kooijman
+*/
+
+#include "Arduino.h"
+#include "HardwareSerial.h"
+#include "HardwareSerial_private.h"
+
+// Each HardwareSerial is defined in its own file, sine the linker pulls
+// in the entire file when any element inside is used. --gc-sections can
+// additionally cause unused symbols to be dropped, but ISRs have the
+// "used" attribute so are never dropped and they keep the
+// HardwareSerial instance in as well. Putting each instance in its own
+// file prevents the linker from pulling in any unused instances in the
+// first place.
+
+#if defined(HAVE_HWSERIAL0)
+
+#if defined(USART_RX_vect)
+  ISR(USART_RX_vect)
+#elif defined(USART0_RX_vect)
+  ISR(USART0_RX_vect)
+#elif defined(USART_RXC_vect)
+  ISR(USART_RXC_vect) // ATmega8
+#else
+  #error "Don't know what the Data Received vector is called for Serial"
+#endif
+  {
+    Serial._rx_complete_irq();
+  }
+
+#if defined(UART0_UDRE_vect)
+ISR(UART0_UDRE_vect)
+#elif defined(UART_UDRE_vect)
+ISR(UART_UDRE_vect)
+#elif defined(USART0_UDRE_vect)
+ISR(USART0_UDRE_vect)
+#elif defined(USART_UDRE_vect)
+ISR(USART_UDRE_vect)
+#else
+  #error "Don't know what the Data Register Empty vector is called for Serial"
+#endif
+{
+  Serial._tx_udr_empty_irq();
+}
+
+#if defined(UBRRH) && defined(UBRRL)
+  HardwareSerial Serial(&UBRRH, &UBRRL, &UCSRA, &UCSRB, &UCSRC, &UDR);
+#else
+  HardwareSerial Serial(&UBRR0H, &UBRR0L, &UCSR0A, &UCSR0B, &UCSR0C, &UDR0);
+#endif
+
+// Function that can be weakly referenced by serialEventRun to prevent
+// pulling in this file if it's not otherwise used.
+bool Serial0_available() {
+  return Serial.available();
+}
+
+#endif // HAVE_HWSERIAL0

cpu/avr/dev/arduino/HardwareSerial1.cpp

@@ -0,0 +1,69 @@
+/*
+  HardwareSerial1.cpp - Hardware serial library for Wiring
+  Copyright (c) 2006 Nicholas Zambetti.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+  Modified 23 November 2006 by David A. Mellis
+  Modified 28 September 2010 by Mark Sproul
+  Modified 14 August 2012 by Alarus
+  Modified 3 December 2013 by Matthijs Kooijman
+*/
+
+#include "Arduino.h"
+#include "HardwareSerial.h"
+#include "HardwareSerial_private.h"
+
+// Each HardwareSerial is defined in its own file, sine the linker pulls
+// in the entire file when any element inside is used. --gc-sections can
+// additionally cause unused symbols to be dropped, but ISRs have the
+// "used" attribute so are never dropped and they keep the
+// HardwareSerial instance in as well. Putting each instance in its own
+// file prevents the linker from pulling in any unused instances in the
+// first place.
+
+#if defined(HAVE_HWSERIAL1)
+
+#if defined(UART1_RX_vect)
+ISR(UART1_RX_vect)
+#elif defined(USART1_RX_vect)
+ISR(USART1_RX_vect)
+#else
+#error "Don't know what the Data Register Empty vector is called for Serial1"
+#endif
+{
+  Serial1._rx_complete_irq();
+}
+
+#if defined(UART1_UDRE_vect)
+ISR(UART1_UDRE_vect)
+#elif defined(USART1_UDRE_vect)
+ISR(USART1_UDRE_vect)
+#else
+#error "Don't know what the Data Register Empty vector is called for Serial1"
+#endif
+{
+  Serial1._tx_udr_empty_irq();
+}
+
+HardwareSerial Serial1(&UBRR1H, &UBRR1L, &UCSR1A, &UCSR1B, &UCSR1C, &UDR1);
+
+// Function that can be weakly referenced by serialEventRun to prevent
+// pulling in this file if it's not otherwise used.
+bool Serial1_available() {
+  return Serial1.available();
+}
+
+#endif // HAVE_HWSERIAL1

cpu/avr/dev/arduino/HardwareSerial_private.h

@@ -0,0 +1,123 @@
+/*
+  HardwareSerial_private.h - Hardware serial library for Wiring
+  Copyright (c) 2006 Nicholas Zambetti.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+  Modified 23 November 2006 by David A. Mellis
+  Modified 28 September 2010 by Mark Sproul
+  Modified 14 August 2012 by Alarus
+*/
+
+#include "wiring_private.h"
+
+// this next line disables the entire HardwareSerial.cpp, 
+// this is so I can support Attiny series and any other chip without a uart
+#if defined(HAVE_HWSERIAL0) || defined(HAVE_HWSERIAL1) || defined(HAVE_HWSERIAL2) || defined(HAVE_HWSERIAL3)
+
+// Ensure that the various bit positions we use are available with a 0
+// postfix, so we can always use the values for UART0 for all UARTs. The
+// alternative, passing the various values for each UART to the
+// HardwareSerial constructor also works, but makes the code bigger and
+// slower.
+#if !defined(TXC0)
+#if defined(TXC)
+// Some chips like ATmega8 don't have UPE, only PE. The other bits are
+// named as expected.
+#if !defined(UPE) && defined(PE)
+#define UPE PE
+#endif
+// On ATmega8, the uart and its bits are not numbered, so there is no TXC0 etc.
+#define TXC0 TXC
+#define RXEN0 RXEN
+#define TXEN0 TXEN
+#define RXCIE0 RXCIE
+#define UDRIE0 UDRIE
+#define U2X0 U2X
+#define UPE0 UPE
+#define UDRE0 UDRE
+#elif defined(TXC1)
+// Some devices have uart1 but no uart0
+#define TXC0 TXC1
+#define RXEN0 RXEN1
+#define TXEN0 TXEN1
+#define RXCIE0 RXCIE1
+#define UDRIE0 UDRIE1
+#define U2X0 U2X1
+#define UPE0 UPE1
+#define UDRE0 UDRE1
+#else
+#error No UART found in HardwareSerial.cpp
+#endif
+#endif // !defined TXC0
+
+// Check at compiletime that it is really ok to use the bit positions of
+// UART0 for the other UARTs as well, in case these values ever get
+// changed for future hardware.
+#if defined(TXC1) && (TXC1 != TXC0 || RXEN1 != RXEN0 || RXCIE1 != RXCIE0 || \
+		      UDRIE1 != UDRIE0 || U2X1 != U2X0 || UPE1 != UPE0 || \
+		      UDRE1 != UDRE0)
+#error "Not all bit positions for UART1 are the same as for UART0"
+#endif
+#if defined(TXC2) && (TXC2 != TXC0 || RXEN2 != RXEN0 || RXCIE2 != RXCIE0 || \
+		      UDRIE2 != UDRIE0 || U2X2 != U2X0 || UPE2 != UPE0 || \
+		      UDRE2 != UDRE0)
+#error "Not all bit positions for UART2 are the same as for UART0"
+#endif
+#if defined(TXC3) && (TXC3 != TXC0 || RXEN3 != RXEN0 || RXCIE3 != RXCIE0 || \
+		      UDRIE3 != UDRIE0 || U3X3 != U3X0 || UPE3 != UPE0 || \
+		      UDRE3 != UDRE0)
+#error "Not all bit positions for UART3 are the same as for UART0"
+#endif
+
+// Constructors ////////////////////////////////////////////////////////////////
+
+HardwareSerial::HardwareSerial(
+  volatile uint8_t *ubrrh, volatile uint8_t *ubrrl,
+  volatile uint8_t *ucsra, volatile uint8_t *ucsrb,
+  volatile uint8_t *ucsrc, volatile uint8_t *udr) :
+    _ubrrh(ubrrh), _ubrrl(ubrrl),
+    _ucsra(ucsra), _ucsrb(ucsrb), _ucsrc(ucsrc),
+    _udr(udr),
+    _rx_buffer_head(0), _rx_buffer_tail(0),
+    _tx_buffer_head(0), _tx_buffer_tail(0)
+{
+}
+
+// Actual interrupt handlers //////////////////////////////////////////////////////////////
+
+void HardwareSerial::_rx_complete_irq(void)
+{
+  if (bit_is_clear(*_ucsra, UPE0)) {
+    // No Parity error, read byte and store it in the buffer if there is
+    // room
+    unsigned char c = *_udr;
+    rx_buffer_index_t i = (unsigned int)(_rx_buffer_head + 1) % SERIAL_RX_BUFFER_SIZE;
+
+    // if we should be storing the received character into the location
+    // just before the tail (meaning that the head would advance to the
+    // current location of the tail), we're about to overflow the buffer
+    // and so we don't write the character or advance the head.
+    if (i != _rx_buffer_tail) {
+      _rx_buffer[_rx_buffer_head] = c;
+      _rx_buffer_head = i;
+    }
+  } else {
+    // Parity error, read byte but discard it
+    *_udr;
+  };
+}
+
+#endif // whole file

cpu/avr/dev/arduino/Print.cpp

@@ -0,0 +1,265 @@
+/*
+ Print.cpp - Base class that provides print() and println()
+ Copyright (c) 2008 David A. Mellis.  All right reserved.
+ 
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+ 
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+ 
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ 
+ Modified 23 November 2006 by David A. Mellis
+ Modified 03 August 2015 by Chuck Todd
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <math.h>
+#include "Arduino.h"
+
+#include "Print.h"
+
+// Public Methods //////////////////////////////////////////////////////////////
+
+/* default implementation: may be overridden */
+size_t Print::write(const uint8_t *buffer, size_t size)
+{
+  size_t n = 0;
+  while (size--) {
+    if (write(*buffer++)) n++;
+    else break;
+  }
+  return n;
+}
+
+size_t Print::print(const __FlashStringHelper *ifsh)
+{
+  PGM_P p = reinterpret_cast<PGM_P>(ifsh);
+  size_t n = 0;
+  while (1) {
+    unsigned char c = pgm_read_byte(p++);
+    if (c == 0) break;
+    if (write(c)) n++;
+    else break;
+  }
+  return n;
+}
+
+size_t Print::print(const String &s)
+{
+  return write(s.c_str(), s.length());
+}
+
+size_t Print::print(const char str[])
+{
+  return write(str);
+}
+
+size_t Print::print(char c)
+{
+  return write(c);
+}
+
+size_t Print::print(unsigned char b, int base)
+{
+  return print((unsigned long) b, base);
+}
+
+size_t Print::print(int n, int base)
+{
+  return print((long) n, base);
+}
+
+size_t Print::print(unsigned int n, int base)
+{
+  return print((unsigned long) n, base);
+}
+
+size_t Print::print(long n, int base)
+{
+  if (base == 0) {
+    return write(n);
+  } else if (base == 10) {
+    if (n < 0) {
+      int t = print('-');
+      n = -n;
+      return printNumber(n, 10) + t;
+    }
+    return printNumber(n, 10);
+  } else {
+    return printNumber(n, base);
+  }
+}
+
+size_t Print::print(unsigned long n, int base)
+{
+  if (base == 0) return write(n);
+  else return printNumber(n, base);
+}
+
+size_t Print::print(double n, int digits)
+{
+  return printFloat(n, digits);
+}
+
+size_t Print::println(const __FlashStringHelper *ifsh)
+{
+  size_t n = print(ifsh);
+  n += println();
+  return n;
+}
+
+size_t Print::print(const Printable& x)
+{
+  return x.printTo(*this);
+}
+
+size_t Print::println(void)
+{
+  return write("\r\n");
+}
+
+size_t Print::println(const String &s)
+{
+  size_t n = print(s);
+  n += println();
+  return n;
+}
+
+size_t Print::println(const char c[])
+{
+  size_t n = print(c);
+  n += println();
+  return n;
+}
+
+size_t Print::println(char c)
+{
+  size_t n = print(c);
+  n += println();
+  return n;
+}
+
+size_t Print::println(unsigned char b, int base)
+{
+  size_t n = print(b, base);
+  n += println();
+  return n;
+}
+
+size_t Print::println(int num, int base)
+{
+  size_t n = print(num, base);
+  n += println();
+  return n;
+}
+
+size_t Print::println(unsigned int num, int base)
+{
+  size_t n = print(num, base);
+  n += println();
+  return n;
+}
+
+size_t Print::println(long num, int base)
+{
+  size_t n = print(num, base);
+  n += println();
+  return n;
+}
+
+size_t Print::println(unsigned long num, int base)
+{
+  size_t n = print(num, base);
+  n += println();
+  return n;
+}
+
+size_t Print::println(double num, int digits)
+{
+  size_t n = print(num, digits);
+  n += println();
+  return n;
+}
+
+size_t Print::println(const Printable& x)
+{
+  size_t n = print(x);
+  n += println();
+  return n;
+}
+
+// Private Methods /////////////////////////////////////////////////////////////
+
+size_t Print::printNumber(unsigned long n, uint8_t base) {
+  char buf[8 * sizeof(long) + 1]; // Assumes 8-bit chars plus zero byte.
+  char *str = &buf[sizeof(buf) - 1];
+
+  *str = '\0';
+
+  // prevent crash if called with base == 1
+  if (base < 2) base = 10;
+
+  do {
+    unsigned long m = n;
+    n /= base;
+    char c = m - base * n;
+    *--str = c < 10 ? c + '0' : c + 'A' - 10;
+  } while(n);
+
+  return write(str);
+}
+
+size_t Print::printFloat(double number, uint8_t digits) 
+{ 
+  size_t n = 0;
+  
+  if (isnan(number)) return print("nan");
+  if (isinf(number)) return print("inf");
+  if (number > 4294967040.0) return print ("ovf");  // constant determined empirically
+  if (number <-4294967040.0) return print ("ovf");  // constant determined empirically
+  
+  // Handle negative numbers
+  if (number < 0.0)
+  {
+     n += print('-');
+     number = -number;
+  }
+
+  // Round correctly so that print(1.999, 2) prints as "2.00"
+  double rounding = 0.5;
+  for (uint8_t i=0; i<digits; ++i)
+    rounding /= 10.0;
+  
+  number += rounding;
+
+  // Extract the integer part of the number and print it
+  unsigned long int_part = (unsigned long)number;
+  double remainder = number - (double)int_part;
+  n += print(int_part);
+
+  // Print the decimal point, but only if there are digits beyond
+  if (digits > 0) {
+    n += print("."); 
+  }
+
+  // Extract digits from the remainder one at a time
+  while (digits-- > 0)
+  {
+    remainder *= 10.0;
+    int toPrint = int(remainder);
+    n += print(toPrint);
+    remainder -= toPrint; 
+  } 
+  
+  return n;
+}

cpu/avr/dev/arduino/Print.h

@@ -0,0 +1,84 @@
+/*
+  Print.h - Base class that provides print() and println()
+  Copyright (c) 2008 David A. Mellis.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#ifndef Print_h
+#define Print_h
+
+#include <inttypes.h>
+#include <stdio.h> // for size_t
+
+#include "WString.h"
+#include "Printable.h"
+
+#define DEC 10
+#define HEX 16
+#define OCT 8
+#define BIN 2
+
+class Print
+{
+  private:
+    int write_error;
+    size_t printNumber(unsigned long, uint8_t);
+    size_t printFloat(double, uint8_t);
+  protected:
+    void setWriteError(int err = 1) { write_error = err; }
+  public:
+    Print() : write_error(0) {}
+  
+    int getWriteError() { return write_error; }
+    void clearWriteError() { setWriteError(0); }
+  
+    virtual size_t write(uint8_t) = 0;
+    size_t write(const char *str) {
+      if (str == NULL) return 0;
+      return write((const uint8_t *)str, strlen(str));
+    }
+    virtual size_t write(const uint8_t *buffer, size_t size);
+    size_t write(const char *buffer, size_t size) {
+      return write((const uint8_t *)buffer, size);
+    }
+    
+    size_t print(const __FlashStringHelper *);
+    size_t print(const String &);
+    size_t print(const char[]);
+    size_t print(char);
+    size_t print(unsigned char, int = DEC);
+    size_t print(int, int = DEC);
+    size_t print(unsigned int, int = DEC);
+    size_t print(long, int = DEC);
+    size_t print(unsigned long, int = DEC);
+    size_t print(double, int = 2);
+    size_t print(const Printable&);
+
+    size_t println(const __FlashStringHelper *);
+    size_t println(const String &s);
+    size_t println(const char[]);
+    size_t println(char);
+    size_t println(unsigned char, int = DEC);
+    size_t println(int, int = DEC);
+    size_t println(unsigned int, int = DEC);
+    size_t println(long, int = DEC);
+    size_t println(unsigned long, int = DEC);
+    size_t println(double, int = 2);
+    size_t println(const Printable&);
+    size_t println(void);
+};
+
+#endif

cpu/avr/dev/arduino/Printable.h

@@ -0,0 +1,40 @@
+/*
+  Printable.h - Interface class that allows printing of complex types
+  Copyright (c) 2011 Adrian McEwen.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#ifndef Printable_h
+#define Printable_h
+
+#include <stdlib.h>
+
+class Print;
+
+/** The Printable class provides a way for new classes to allow themselves to be printed.
+    By deriving from Printable and implementing the printTo method, it will then be possible
+    for users to print out instances of this class by passing them into the usual
+    Print::print and Print::println methods.
+*/
+
+class Printable
+{
+  public:
+    virtual size_t printTo(Print& p) const = 0;
+};
+
+#endif
+

cpu/avr/dev/arduino/SPI.cpp

@@ -0,0 +1,201 @@
+/*
+ * Copyright (c) 2010 by Cristian Maglie <c.maglie@arduino.cc>
+ * Copyright (c) 2014 by Paul Stoffregen <paul@pjrc.com> (Transaction API)
+ * Copyright (c) 2014 by Matthijs Kooijman <matthijs@stdin.nl> (SPISettings AVR)
+ * Copyright (c) 2014 by Andrew J. Kroll <xxxajk@gmail.com> (atomicity fixes)
+ * SPI Master library for arduino.
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of either the GNU General Public License version 2
+ * or the GNU Lesser General Public License version 2.1, both as
+ * published by the Free Software Foundation.
+ */
+
+#include "SPI.h"
+
+SPIClass SPI;
+
+uint8_t SPIClass::initialized = 0;
+uint8_t SPIClass::interruptMode = 0;
+uint8_t SPIClass::interruptMask = 0;
+uint8_t SPIClass::interruptSave = 0;
+#ifdef SPI_TRANSACTION_MISMATCH_LED
+uint8_t SPIClass::inTransactionFlag = 0;
+#endif
+
+void SPIClass::begin()
+{
+  uint8_t sreg = SREG;
+  noInterrupts(); // Protect from a scheduler and prevent transactionBegin
+  if (!initialized) {
+    // Set SS to high so a connected chip will be "deselected" by default
+    uint8_t port = digitalPinToPort(SS);
+    uint8_t bit = digitalPinToBitMask(SS);
+    volatile uint8_t *reg = portModeRegister(port);
+
+    // if the SS pin is not already configured as an output
+    // then set it high (to enable the internal pull-up resistor)
+    if(!(*reg & bit)){
+      digitalWrite(SS, HIGH);
+    }
+
+    // When the SS pin is set as OUTPUT, it can be used as
+    // a general purpose output port (it doesn't influence
+    // SPI operations).
+    pinMode(SS, OUTPUT);
+
+    // Warning: if the SS pin ever becomes a LOW INPUT then SPI
+    // automatically switches to Slave, so the data direction of
+    // the SS pin MUST be kept as OUTPUT.
+    SPCR |= _BV(MSTR);
+    SPCR |= _BV(SPE);
+
+    // Set direction register for SCK and MOSI pin.
+    // MISO pin automatically overrides to INPUT.
+    // By doing this AFTER enabling SPI, we avoid accidentally
+    // clocking in a single bit since the lines go directly
+    // from "input" to SPI control.
+    // http://code.google.com/p/arduino/issues/detail?id=888
+    pinMode(SCK, OUTPUT);
+    pinMode(MOSI, OUTPUT);
+  }
+  initialized++; // reference count
+  SREG = sreg;
+}
+
+void SPIClass::end() {
+  uint8_t sreg = SREG;
+  noInterrupts(); // Protect from a scheduler and prevent transactionBegin
+  // Decrease the reference counter
+  if (initialized)
+    initialized--;
+  // If there are no more references disable SPI
+  if (!initialized) {
+    SPCR &= ~_BV(SPE);
+    interruptMode = 0;
+    #ifdef SPI_TRANSACTION_MISMATCH_LED
+    inTransactionFlag = 0;
+    #endif
+  }
+  SREG = sreg;
+}
+
+// mapping of interrupt numbers to bits within SPI_AVR_EIMSK
+#if defined(__AVR_ATmega32U4__)
+  #define SPI_INT0_MASK  (1<<INT0)
+  #define SPI_INT1_MASK  (1<<INT1)
+  #define SPI_INT2_MASK  (1<<INT2)
+  #define SPI_INT3_MASK  (1<<INT3)
+  #define SPI_INT4_MASK  (1<<INT6)
+#elif defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB1286__)
+  #define SPI_INT0_MASK  (1<<INT0)
+  #define SPI_INT1_MASK  (1<<INT1)
+  #define SPI_INT2_MASK  (1<<INT2)
+  #define SPI_INT3_MASK  (1<<INT3)
+  #define SPI_INT4_MASK  (1<<INT4)
+  #define SPI_INT5_MASK  (1<<INT5)
+  #define SPI_INT6_MASK  (1<<INT6)
+  #define SPI_INT7_MASK  (1<<INT7)
+#elif defined(EICRA) && defined(EICRB) && defined(EIMSK)
+  #define SPI_INT0_MASK  (1<<INT4)
+  #define SPI_INT1_MASK  (1<<INT5)
+  #define SPI_INT2_MASK  (1<<INT0)
+  #define SPI_INT3_MASK  (1<<INT1)
+  #define SPI_INT4_MASK  (1<<INT2)
+  #define SPI_INT5_MASK  (1<<INT3)
+  #define SPI_INT6_MASK  (1<<INT6)
+  #define SPI_INT7_MASK  (1<<INT7)
+#else
+  #ifdef INT0
+  #define SPI_INT0_MASK  (1<<INT0)
+  #endif
+  #ifdef INT1
+  #define SPI_INT1_MASK  (1<<INT1)
+  #endif
+  #ifdef INT2
+  #define SPI_INT2_MASK  (1<<INT2)
+  #endif
+#endif
+
+void SPIClass::usingInterrupt(uint8_t interruptNumber)
+{
+  uint8_t mask = 0;
+  uint8_t sreg = SREG;
+  noInterrupts(); // Protect from a scheduler and prevent transactionBegin
+  switch (interruptNumber) {
+  #ifdef SPI_INT0_MASK
+  case 0: mask = SPI_INT0_MASK; break;
+  #endif
+  #ifdef SPI_INT1_MASK
+  case 1: mask = SPI_INT1_MASK; break;
+  #endif
+  #ifdef SPI_INT2_MASK
+  case 2: mask = SPI_INT2_MASK; break;
+  #endif
+  #ifdef SPI_INT3_MASK
+  case 3: mask = SPI_INT3_MASK; break;
+  #endif
+  #ifdef SPI_INT4_MASK
+  case 4: mask = SPI_INT4_MASK; break;
+  #endif
+  #ifdef SPI_INT5_MASK
+  case 5: mask = SPI_INT5_MASK; break;
+  #endif
+  #ifdef SPI_INT6_MASK
+  case 6: mask = SPI_INT6_MASK; break;
+  #endif
+  #ifdef SPI_INT7_MASK
+  case 7: mask = SPI_INT7_MASK; break;
+  #endif
+  default:
+    interruptMode = 2;
+    break;
+  }
+  interruptMask |= mask;
+  if (!interruptMode)
+    interruptMode = 1;
+  SREG = sreg;
+}
+
+void SPIClass::notUsingInterrupt(uint8_t interruptNumber)
+{
+  // Once in mode 2 we can't go back to 0 without a proper reference count
+  if (interruptMode == 2)
+    return;
+  uint8_t mask = 0;
+  uint8_t sreg = SREG;
+  noInterrupts(); // Protect from a scheduler and prevent transactionBegin
+  switch (interruptNumber) {
+  #ifdef SPI_INT0_MASK
+  case 0: mask = SPI_INT0_MASK; break;
+  #endif
+  #ifdef SPI_INT1_MASK
+  case 1: mask = SPI_INT1_MASK; break;
+  #endif
+  #ifdef SPI_INT2_MASK
+  case 2: mask = SPI_INT2_MASK; break;
+  #endif
+  #ifdef SPI_INT3_MASK
+  case 3: mask = SPI_INT3_MASK; break;
+  #endif
+  #ifdef SPI_INT4_MASK
+  case 4: mask = SPI_INT4_MASK; break;
+  #endif
+  #ifdef SPI_INT5_MASK
+  case 5: mask = SPI_INT5_MASK; break;
+  #endif
+  #ifdef SPI_INT6_MASK
+  case 6: mask = SPI_INT6_MASK; break;
+  #endif
+  #ifdef SPI_INT7_MASK
+  case 7: mask = SPI_INT7_MASK; break;
+  #endif
+  default:
+    break;
+    // this case can't be reached
+  }
+  interruptMask &= ~mask;
+  if (!interruptMask)
+    interruptMode = 0;
+  SREG = sreg;
+}

cpu/avr/dev/arduino/SPI.h

@@ -0,0 +1,324 @@
+/*
+ * Copyright (c) 2010 by Cristian Maglie <c.maglie@arduino.cc>
+ * Copyright (c) 2014 by Paul Stoffregen <paul@pjrc.com> (Transaction API)
+ * Copyright (c) 2014 by Matthijs Kooijman <matthijs@stdin.nl> (SPISettings AVR)
+ * Copyright (c) 2014 by Andrew J. Kroll <xxxajk@gmail.com> (atomicity fixes)
+ * SPI Master library for arduino.
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of either the GNU General Public License version 2
+ * or the GNU Lesser General Public License version 2.1, both as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _SPI_H_INCLUDED
+#define _SPI_H_INCLUDED
+
+#include <Arduino.h>
+
+// SPI_HAS_TRANSACTION means SPI has beginTransaction(), endTransaction(),
+// usingInterrupt(), and SPISetting(clock, bitOrder, dataMode)
+#define SPI_HAS_TRANSACTION 1
+
+// SPI_HAS_NOTUSINGINTERRUPT means that SPI has notUsingInterrupt() method
+#define SPI_HAS_NOTUSINGINTERRUPT 1
+
+// SPI_ATOMIC_VERSION means that SPI has atomicity fixes and what version.
+// This way when there is a bug fix you can check this define to alert users
+// of your code if it uses better version of this library.
+// This also implies everything that SPI_HAS_TRANSACTION as documented above is
+// available too.
+#define SPI_ATOMIC_VERSION 1
+
+// Uncomment this line to add detection of mismatched begin/end transactions.
+// A mismatch occurs if other libraries fail to use SPI.endTransaction() for
+// each SPI.beginTransaction().  Connect an LED to this pin.  The LED will turn
+// on if any mismatch is ever detected.
+//#define SPI_TRANSACTION_MISMATCH_LED 5
+
+#ifndef LSBFIRST
+#define LSBFIRST 0
+#endif
+#ifndef MSBFIRST
+#define MSBFIRST 1
+#endif
+
+#define SPI_CLOCK_DIV4 0x00
+#define SPI_CLOCK_DIV16 0x01
+#define SPI_CLOCK_DIV64 0x02
+#define SPI_CLOCK_DIV128 0x03
+#define SPI_CLOCK_DIV2 0x04
+#define SPI_CLOCK_DIV8 0x05
+#define SPI_CLOCK_DIV32 0x06
+
+#define SPI_MODE0 0x00
+#define SPI_MODE1 0x04
+#define SPI_MODE2 0x08
+#define SPI_MODE3 0x0C
+
+#define SPI_MODE_MASK 0x0C  // CPOL = bit 3, CPHA = bit 2 on SPCR
+#define SPI_CLOCK_MASK 0x03  // SPR1 = bit 1, SPR0 = bit 0 on SPCR
+#define SPI_2XCLOCK_MASK 0x01  // SPI2X = bit 0 on SPSR
+
+// define SPI_AVR_EIMSK for AVR boards with external interrupt pins
+#if defined(EIMSK)
+  #define SPI_AVR_EIMSK  EIMSK
+#elif defined(GICR)
+  #define SPI_AVR_EIMSK  GICR
+#elif defined(GIMSK)
+  #define SPI_AVR_EIMSK  GIMSK
+#endif
+
+class SPISettings {
+public:
+  SPISettings(uint32_t clock, uint8_t bitOrder, uint8_t dataMode) {
+    if (__builtin_constant_p(clock)) {
+      init_AlwaysInline(clock, bitOrder, dataMode);
+    } else {
+      init_MightInline(clock, bitOrder, dataMode);
+    }
+  }
+  SPISettings() {
+    init_AlwaysInline(4000000, MSBFIRST, SPI_MODE0);
+  }
+private:
+  void init_MightInline(uint32_t clock, uint8_t bitOrder, uint8_t dataMode) {
+    init_AlwaysInline(clock, bitOrder, dataMode);
+  }
+  void init_AlwaysInline(uint32_t clock, uint8_t bitOrder, uint8_t dataMode)
+    __attribute__((__always_inline__)) {
+    // Clock settings are defined as follows. Note that this shows SPI2X
+    // inverted, so the bits form increasing numbers. Also note that
+    // fosc/64 appears twice
+    // SPR1 SPR0 ~SPI2X Freq
+    //   0    0     0   fosc/2
+    //   0    0     1   fosc/4
+    //   0    1     0   fosc/8
+    //   0    1     1   fosc/16
+    //   1    0     0   fosc/32
+    //   1    0     1   fosc/64
+    //   1    1     0   fosc/64
+    //   1    1     1   fosc/128
+
+    // We find the fastest clock that is less than or equal to the
+    // given clock rate. The clock divider that results in clock_setting
+    // is 2 ^^ (clock_div + 1). If nothing is slow enough, we'll use the
+    // slowest (128 == 2 ^^ 7, so clock_div = 6).
+    uint8_t clockDiv;
+
+    // When the clock is known at compiletime, use this if-then-else
+    // cascade, which the compiler knows how to completely optimize
+    // away. When clock is not known, use a loop instead, which generates
+    // shorter code.
+    if (__builtin_constant_p(clock)) {
+      if (clock >= F_CPU / 2) {
+        clockDiv = 0;
+      } else if (clock >= F_CPU / 4) {
+        clockDiv = 1;
+      } else if (clock >= F_CPU / 8) {
+        clockDiv = 2;
+      } else if (clock >= F_CPU / 16) {
+        clockDiv = 3;
+      } else if (clock >= F_CPU / 32) {
+        clockDiv = 4;
+      } else if (clock >= F_CPU / 64) {
+        clockDiv = 5;
+      } else {
+        clockDiv = 6;
+      }
+    } else {
+      uint32_t clockSetting = F_CPU / 2;
+      clockDiv = 0;
+      while (clockDiv < 6 && clock < clockSetting) {
+        clockSetting /= 2;
+        clockDiv++;
+      }
+    }
+
+    // Compensate for the duplicate fosc/64
+    if (clockDiv == 6)
+    clockDiv = 7;
+
+    // Invert the SPI2X bit
+    clockDiv ^= 0x1;
+
+    // Pack into the SPISettings class
+    spcr = _BV(SPE) | _BV(MSTR) | ((bitOrder == LSBFIRST) ? _BV(DORD) : 0) |
+      (dataMode & SPI_MODE_MASK) | ((clockDiv >> 1) & SPI_CLOCK_MASK);
+    spsr = clockDiv & SPI_2XCLOCK_MASK;
+  }
+  uint8_t spcr;
+  uint8_t spsr;
+  friend class SPIClass;
+};
+
+
+class SPIClass {
+public:
+  // Initialize the SPI library
+  static void begin();
+
+  // If SPI is used from within an interrupt, this function registers
+  // that interrupt with the SPI library, so beginTransaction() can
+  // prevent conflicts.  The input interruptNumber is the number used
+  // with attachInterrupt.  If SPI is used from a different interrupt
+  // (eg, a timer), interruptNumber should be 255.
+  static void usingInterrupt(uint8_t interruptNumber);
+  // And this does the opposite.
+  static void notUsingInterrupt(uint8_t interruptNumber);
+  // Note: the usingInterrupt and notUsingInterrupt functions should
+  // not to be called from ISR context or inside a transaction.
+  // For details see:
+  // https://github.com/arduino/Arduino/pull/2381
+  // https://github.com/arduino/Arduino/pull/2449
+
+  // Before using SPI.transfer() or asserting chip select pins,
+  // this function is used to gain exclusive access to the SPI bus
+  // and configure the correct settings.
+  inline static void beginTransaction(SPISettings settings) {
+    if (interruptMode > 0) {
+      uint8_t sreg = SREG;
+      noInterrupts();
+
+      #ifdef SPI_AVR_EIMSK
+      if (interruptMode == 1) {
+        interruptSave = SPI_AVR_EIMSK;
+        SPI_AVR_EIMSK &= ~interruptMask;
+        SREG = sreg;
+      } else
+      #endif
+      {
+        interruptSave = sreg;
+      }
+    }
+
+    #ifdef SPI_TRANSACTION_MISMATCH_LED
+    if (inTransactionFlag) {
+      pinMode(SPI_TRANSACTION_MISMATCH_LED, OUTPUT);
+      digitalWrite(SPI_TRANSACTION_MISMATCH_LED, HIGH);
+    }
+    inTransactionFlag = 1;
+    #endif
+
+    SPCR = settings.spcr;
+    SPSR = settings.spsr;
+  }
+
+  // Write to the SPI bus (MOSI pin) and also receive (MISO pin)
+  inline static uint8_t transfer(uint8_t data) {
+    SPDR = data;
+    /*
+     * The following NOP introduces a small delay that can prevent the wait
+     * loop form iterating when running at the maximum speed. This gives
+     * about 10% more speed, even if it seems counter-intuitive. At lower
+     * speeds it is unnoticed.
+     */
+    asm volatile("nop");
+    while (!(SPSR & _BV(SPIF))) ; // wait
+    return SPDR;
+  }
+  inline static uint16_t transfer16(uint16_t data) {
+    union { uint16_t val; struct { uint8_t lsb; uint8_t msb; }; } in, out;
+    in.val = data;
+    if (!(SPCR & _BV(DORD))) {
+      SPDR = in.msb;
+      asm volatile("nop"); // See transfer(uint8_t) function
+      while (!(SPSR & _BV(SPIF))) ;
+      out.msb = SPDR;
+      SPDR = in.lsb;
+      asm volatile("nop");
+      while (!(SPSR & _BV(SPIF))) ;
+      out.lsb = SPDR;
+    } else {
+      SPDR = in.lsb;
+      asm volatile("nop");
+      while (!(SPSR & _BV(SPIF))) ;
+      out.lsb = SPDR;
+      SPDR = in.msb;
+      asm volatile("nop");
+      while (!(SPSR & _BV(SPIF))) ;
+      out.msb = SPDR;
+    }
+    return out.val;
+  }
+  inline static void transfer(void *buf, size_t count) {
+    if (count == 0) return;
+    uint8_t *p = (uint8_t *)buf;
+    SPDR = *p;
+    while (--count > 0) {
+      uint8_t out = *(p + 1);
+      while (!(SPSR & _BV(SPIF))) ;
+      uint8_t in = SPDR;
+      SPDR = out;
+      *p++ = in;
+    }
+    while (!(SPSR & _BV(SPIF))) ;
+    *p = SPDR;
+  }
+  // After performing a group of transfers and releasing the chip select
+  // signal, this function allows others to access the SPI bus
+  inline static void endTransaction(void) {
+    #ifdef SPI_TRANSACTION_MISMATCH_LED
+    if (!inTransactionFlag) {
+      pinMode(SPI_TRANSACTION_MISMATCH_LED, OUTPUT);
+      digitalWrite(SPI_TRANSACTION_MISMATCH_LED, HIGH);
+    }
+    inTransactionFlag = 0;
+    #endif
+
+    if (interruptMode > 0) {
+      #ifdef SPI_AVR_EIMSK
+      uint8_t sreg = SREG;
+      #endif
+      noInterrupts();
+      #ifdef SPI_AVR_EIMSK
+      if (interruptMode == 1) {
+        SPI_AVR_EIMSK = interruptSave;
+        SREG = sreg;
+      } else
+      #endif
+      {
+        SREG = interruptSave;
+      }
+    }
+  }
+
+  // Disable the SPI bus
+  static void end();
+
+  // This function is deprecated.  New applications should use
+  // beginTransaction() to configure SPI settings.
+  inline static void setBitOrder(uint8_t bitOrder) {
+    if (bitOrder == LSBFIRST) SPCR |= _BV(DORD);
+    else SPCR &= ~(_BV(DORD));
+  }
+  // This function is deprecated.  New applications should use
+  // beginTransaction() to configure SPI settings.
+  inline static void setDataMode(uint8_t dataMode) {
+    SPCR = (SPCR & ~SPI_MODE_MASK) | dataMode;
+  }
+  // This function is deprecated.  New applications should use
+  // beginTransaction() to configure SPI settings.
+  inline static void setClockDivider(uint8_t clockDiv) {
+    SPCR = (SPCR & ~SPI_CLOCK_MASK) | (clockDiv & SPI_CLOCK_MASK);
+    SPSR = (SPSR & ~SPI_2XCLOCK_MASK) | ((clockDiv >> 2) & SPI_2XCLOCK_MASK);
+  }
+  // These undocumented functions should not be used.  SPI.transfer()
+  // polls the hardware flag which is automatically cleared as the
+  // AVR responds to SPI's interrupt
+  inline static void attachInterrupt() { SPCR |= _BV(SPIE); }
+  inline static void detachInterrupt() { SPCR &= ~_BV(SPIE); }
+
+private:
+  static uint8_t initialized;
+  static uint8_t interruptMode; // 0=none, 1=mask, 2=global
+  static uint8_t interruptMask; // which interrupts to mask
+  static uint8_t interruptSave; // temp storage, to restore state
+  #ifdef SPI_TRANSACTION_MISMATCH_LED
+  static uint8_t inTransactionFlag;
+  #endif
+};
+
+extern SPIClass SPI;
+
+#endif

cpu/avr/dev/arduino/Stream.cpp

@@ -0,0 +1,319 @@
+/*
+ Stream.cpp - adds parsing methods to Stream class
+ Copyright (c) 2008 David A. Mellis.  All right reserved.
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+ Created July 2011
+ parsing functions based on TextFinder library by Michael Margolis
+
+ findMulti/findUntil routines written by Jim Leonard/Xuth
+ */
+
+#include "Arduino.h"
+#include "Stream.h"
+
+#define PARSE_TIMEOUT 1000  // default number of milli-seconds to wait
+
+// private method to read stream with timeout
+int Stream::timedRead()
+{
+  int c;
+  _startMillis = millis();
+  do {
+    c = read();
+    if (c >= 0) return c;
+  } while(millis() - _startMillis < _timeout);
+  return -1;     // -1 indicates timeout
+}
+
+// private method to peek stream with timeout
+int Stream::timedPeek()
+{
+  int c;
+  _startMillis = millis();
+  do {
+    c = peek();
+    if (c >= 0) return c;
+  } while(millis() - _startMillis < _timeout);
+  return -1;     // -1 indicates timeout
+}
+
+// returns peek of the next digit in the stream or -1 if timeout
+// discards non-numeric characters
+int Stream::peekNextDigit(LookaheadMode lookahead, bool detectDecimal)
+{
+  int c;
+  while (1) {
+    c = timedPeek();
+
+    if( c < 0 ||
+        c == '-' ||
+        (c >= '0' && c <= '9') ||
+        (detectDecimal && c == '.')) return c;
+
+    switch( lookahead ){
+        case SKIP_NONE: return -1; // Fail code.
+        case SKIP_WHITESPACE:
+            switch( c ){
+                case ' ':
+                case '\t':
+                case '\r':
+                case '\n': break;
+                default: return -1; // Fail code.
+            }
+        case SKIP_ALL:
+            break;
+    }
+    read();  // discard non-numeric
+  }
+}
+
+// Public Methods
+//////////////////////////////////////////////////////////////
+
+void Stream::setTimeout(unsigned long timeout)  // sets the maximum number of milliseconds to wait
+{
+  _timeout = timeout;
+}
+
+ // find returns true if the target string is found
+bool  Stream::find(char *target)
+{
+  return findUntil(target, strlen(target), NULL, 0);
+}
+
+// reads data from the stream until the target string of given length is found
+// returns true if target string is found, false if timed out
+bool Stream::find(char *target, size_t length)
+{
+  return findUntil(target, length, NULL, 0);
+}
+
+// as find but search ends if the terminator string is found
+bool  Stream::findUntil(char *target, char *terminator)
+{
+  return findUntil(target, strlen(target), terminator, strlen(terminator));
+}
+
+// reads data from the stream until the target string of the given length is found
+// search terminated if the terminator string is found
+// returns true if target string is found, false if terminated or timed out
+bool Stream::findUntil(char *target, size_t targetLen, char *terminator, size_t termLen)
+{
+  if (terminator == NULL) {
+    MultiTarget t[1] = {{target, targetLen, 0}};
+    return findMulti(t, 1) == 0 ? true : false;
+  } else {
+    MultiTarget t[2] = {{target, targetLen, 0}, {terminator, termLen, 0}};
+    return findMulti(t, 2) == 0 ? true : false;
+  }
+}
+
+// returns the first valid (long) integer value from the current position.
+// lookahead determines how parseInt looks ahead in the stream.
+// See LookaheadMode enumeration at the top of the file.
+// Lookahead is terminated by the first character that is not a valid part of an integer.
+// Once parsing commences, 'ignore' will be skipped in the stream.
+long Stream::parseInt(LookaheadMode lookahead, char ignore)
+{
+  bool isNegative = false;
+  long value = 0;
+  int c;
+
+  c = peekNextDigit(lookahead, false);
+  // ignore non numeric leading characters
+  if(c < 0)
+    return 0; // zero returned if timeout
+
+  do{
+    if(c == ignore)
+      ; // ignore this character
+    else if(c == '-')
+      isNegative = true;
+    else if(c >= '0' && c <= '9')        // is c a digit?
+      value = value * 10 + c - '0';
+    read();  // consume the character we got with peek
+    c = timedPeek();
+  }
+  while( (c >= '0' && c <= '9') || c == ignore );
+
+  if(isNegative)
+    value = -value;
+  return value;
+}
+
+// as parseInt but returns a floating point value
+float Stream::parseFloat(LookaheadMode lookahead, char ignore)
+{
+  bool isNegative = false;
+  bool isFraction = false;
+  long value = 0;
+  int c;
+  float fraction = 1.0;
+
+  c = peekNextDigit(lookahead, true);
+    // ignore non numeric leading characters
+  if(c < 0)
+    return 0; // zero returned if timeout
+
+  do{
+    if(c == ignore)
+      ; // ignore
+    else if(c == '-')
+      isNegative = true;
+    else if (c == '.')
+      isFraction = true;
+    else if(c >= '0' && c <= '9')  {      // is c a digit?
+      value = value * 10 + c - '0';
+      if(isFraction)
+         fraction *= 0.1;
+    }
+    read();  // consume the character we got with peek
+    c = timedPeek();
+  }
+  while( (c >= '0' && c <= '9')  || (c == '.' && !isFraction) || c == ignore );
+
+  if(isNegative)
+    value = -value;
+  if(isFraction)
+    return value * fraction;
+  else
+    return value;
+}
+
+// read characters from stream into buffer
+// terminates if length characters have been read, or timeout (see setTimeout)
+// returns the number of characters placed in the buffer
+// the buffer is NOT null terminated.
+//
+size_t Stream::readBytes(char *buffer, size_t length)
+{
+  size_t count = 0;
+  while (count < length) {
+    int c = timedRead();
+    if (c < 0) break;
+    *buffer++ = (char)c;
+    count++;
+  }
+  return count;
+}
+
+
+// as readBytes with terminator character
+// terminates if length characters have been read, timeout, or if the terminator character  detected
+// returns the number of characters placed in the buffer (0 means no valid data found)
+
+size_t Stream::readBytesUntil(char terminator, char *buffer, size_t length)
+{
+  if (length < 1) return 0;
+  size_t index = 0;
+  while (index < length) {
+    int c = timedRead();
+    if (c < 0 || c == terminator) break;
+    *buffer++ = (char)c;
+    index++;
+  }
+  return index; // return number of characters, not including null terminator
+}
+
+String Stream::readString()
+{
+  String ret;
+  int c = timedRead();
+  while (c >= 0)
+  {
+    ret += (char)c;
+    c = timedRead();
+  }
+  return ret;
+}
+
+String Stream::readStringUntil(char terminator)
+{
+  String ret;
+  int c = timedRead();
+  while (c >= 0 && c != terminator)
+  {
+    ret += (char)c;
+    c = timedRead();
+  }
+  return ret;
+}
+
+int Stream::findMulti( struct Stream::MultiTarget *targets, int tCount) {
+  // any zero length target string automatically matches and would make
+  // a mess of the rest of the algorithm.
+  for (struct MultiTarget *t = targets; t < targets+tCount; ++t) {
+    if (t->len <= 0)
+      return t - targets;
+  }
+
+  while (1) {
+    int c = timedRead();
+    if (c < 0)
+      return -1;
+
+    for (struct MultiTarget *t = targets; t < targets+tCount; ++t) {
+      // the simple case is if we match, deal with that first.
+      if (c == t->str[t->index]) {
+        if (++t->index == t->len)
+          return t - targets;
+        else
+          continue;
+      }
+
+      // if not we need to walk back and see if we could have matched further
+      // down the stream (ie '1112' doesn't match the first position in '11112'
+      // but it will match the second position so we can't just reset the current
+      // index to 0 when we find a mismatch.
+      if (t->index == 0)
+        continue;
+
+      int origIndex = t->index;
+      do {
+        --t->index;
+        // first check if current char works against the new current index
+        if (c != t->str[t->index])
+          continue;
+
+        // if it's the only char then we're good, nothing more to check
+        if (t->index == 0) {
+          t->index++;
+          break;
+        }
+
+        // otherwise we need to check the rest of the found string
+        int diff = origIndex - t->index;
+        size_t i;
+        for (i = 0; i < t->index; ++i) {
+          if (t->str[i] != t->str[i + diff])
+            break;
+        }
+
+        // if we successfully got through the previous loop then our current
+        // index is good.
+        if (i == t->index) {
+          t->index++;
+          break;
+        }
+
+        // otherwise we just try the next index
+      } while (t->index);
+    }
+  }
+  // unreachable
+  return -1;
+}

cpu/avr/dev/arduino/Stream.h

@@ -0,0 +1,129 @@
+/*
+  Stream.h - base class for character-based streams.
+  Copyright (c) 2010 David A. Mellis.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+  parsing functions based on TextFinder library by Michael Margolis
+*/
+
+#ifndef Stream_h
+#define Stream_h
+
+#include <inttypes.h>
+#include "Print.h"
+
+// compatability macros for testing
+/*
+#define   getInt()            parseInt()
+#define   getInt(ignore)    parseInt(ignore)
+#define   getFloat()          parseFloat()
+#define   getFloat(ignore)  parseFloat(ignore)
+#define   getString( pre_string, post_string, buffer, length)
+readBytesBetween( pre_string, terminator, buffer, length)
+*/
+
+// This enumeration provides the lookahead options for parseInt(), parseFloat()
+// The rules set out here are used until either the first valid character is found
+// or a time out occurs due to lack of input.
+enum LookaheadMode{
+    SKIP_ALL,       // All invalid characters are ignored.
+    SKIP_NONE,      // Nothing is skipped, and the stream is not touched unless the first waiting character is valid.
+    SKIP_WHITESPACE // Only tabs, spaces, line feeds & carriage returns are skipped.
+};
+
+#define NO_IGNORE_CHAR  '\x01' // a char not found in a valid ASCII numeric field
+
+class Stream : public Print
+{
+  protected:
+    unsigned long _timeout;      // number of milliseconds to wait for the next char before aborting timed read
+    unsigned long _startMillis;  // used for timeout measurement
+    int timedRead();    // private method to read stream with timeout
+    int timedPeek();    // private method to peek stream with timeout
+    int peekNextDigit(LookaheadMode lookahead, bool detectDecimal); // returns the next numeric digit in the stream or -1 if timeout
+
+  public:
+    virtual int available() = 0;
+    virtual int read() = 0;
+    virtual int peek() = 0;
+    virtual void flush() = 0;
+
+    Stream() {_timeout=1000;}
+
+// parsing methods
+
+  void setTimeout(unsigned long timeout);  // sets maximum milliseconds to wait for stream data, default is 1 second
+
+  bool find(char *target);   // reads data from the stream until the target string is found
+  bool find(uint8_t *target) { return find ((char *)target); }
+  // returns true if target string is found, false if timed out (see setTimeout)
+
+  bool find(char *target, size_t length);   // reads data from the stream until the target string of given length is found
+  bool find(uint8_t *target, size_t length) { return find ((char *)target, length); }
+  // returns true if target string is found, false if timed out
+
+  bool find(char target) { return find (&target, 1); }
+
+  bool findUntil(char *target, char *terminator);   // as find but search ends if the terminator string is found
+  bool findUntil(uint8_t *target, char *terminator) { return findUntil((char *)target, terminator); }
+
+  bool findUntil(char *target, size_t targetLen, char *terminate, size_t termLen);   // as above but search ends if the terminate string is found
+  bool findUntil(uint8_t *target, size_t targetLen, char *terminate, size_t termLen) {return findUntil((char *)target, targetLen, terminate, termLen); }
+
+  long parseInt(LookaheadMode lookahead = SKIP_ALL, char ignore = NO_IGNORE_CHAR);
+  // returns the first valid (long) integer value from the current position.
+  // lookahead determines how parseInt looks ahead in the stream.
+  // See LookaheadMode enumeration at the top of the file.
+  // Lookahead is terminated by the first character that is not a valid part of an integer.
+  // Once parsing commences, 'ignore' will be skipped in the stream.
+
+  float parseFloat(LookaheadMode lookahead = SKIP_ALL, char ignore = NO_IGNORE_CHAR);
+  // float version of parseInt
+
+  size_t readBytes( char *buffer, size_t length); // read chars from stream into buffer
+  size_t readBytes( uint8_t *buffer, size_t length) { return readBytes((char *)buffer, length); }
+  // terminates if length characters have been read or timeout (see setTimeout)
+  // returns the number of characters placed in the buffer (0 means no valid data found)
+
+  size_t readBytesUntil( char terminator, char *buffer, size_t length); // as readBytes with terminator character
+  size_t readBytesUntil( char terminator, uint8_t *buffer, size_t length) { return readBytesUntil(terminator, (char *)buffer, length); }
+  // terminates if length characters have been read, timeout, or if the terminator character  detected
+  // returns the number of characters placed in the buffer (0 means no valid data found)
+
+  // Arduino String functions to be added here
+  String readString();
+  String readStringUntil(char terminator);
+
+  protected:
+  long parseInt(char ignore) { return parseInt(SKIP_ALL, ignore); }
+  float parseFloat(char ignore) { return parseFloat(SKIP_ALL, ignore); }
+  // These overload exists for compatibility with any class that has derived
+  // Stream and used parseFloat/Int with a custom ignore character. To keep
+  // the public API simple, these overload remains protected.
+
+  struct MultiTarget {
+    const char *str;  // string you're searching for
+    size_t len;       // length of string you're searching for
+    size_t index;     // index used by the search routine.
+  };
+
+  // This allows you to search for an arbitrary number of strings.
+  // Returns index of the target that is found first or -1 if timeout occurs.
+  int findMulti(struct MultiTarget *targets, int tCount);
+};
+
+#undef NO_IGNORE_CHAR
+#endif

cpu/avr/dev/arduino/WCharacter.h

@@ -0,0 +1,168 @@
+/*
+ WCharacter.h - Character utility functions for Wiring & Arduino
+ Copyright (c) 2010 Hernando Barragan.  All right reserved.
+ 
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+ 
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ Lesser General Public License for more details.
+ 
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef Character_h
+#define Character_h
+
+#include <ctype.h>
+
+// WCharacter.h prototypes
+inline boolean isAlphaNumeric(int c) __attribute__((always_inline));
+inline boolean isAlpha(int c) __attribute__((always_inline));
+inline boolean isAscii(int c) __attribute__((always_inline));
+inline boolean isWhitespace(int c) __attribute__((always_inline));
+inline boolean isControl(int c) __attribute__((always_inline));
+inline boolean isDigit(int c) __attribute__((always_inline));
+inline boolean isGraph(int c) __attribute__((always_inline));
+inline boolean isLowerCase(int c) __attribute__((always_inline));
+inline boolean isPrintable(int c) __attribute__((always_inline));
+inline boolean isPunct(int c) __attribute__((always_inline));
+inline boolean isSpace(int c) __attribute__((always_inline));
+inline boolean isUpperCase(int c) __attribute__((always_inline));
+inline boolean isHexadecimalDigit(int c) __attribute__((always_inline));
+inline int toAscii(int c) __attribute__((always_inline));
+inline int toLowerCase(int c) __attribute__((always_inline));
+inline int toUpperCase(int c)__attribute__((always_inline));
+
+
+// Checks for an alphanumeric character. 
+// It is equivalent to (isalpha(c) || isdigit(c)).
+inline boolean isAlphaNumeric(int c) 
+{
+  return ( isalnum(c) == 0 ? false : true);
+}
+
+
+// Checks for an alphabetic character. 
+// It is equivalent to (isupper(c) || islower(c)).
+inline boolean isAlpha(int c)
+{
+  return ( isalpha(c) == 0 ? false : true);
+}
+
+
+// Checks whether c is a 7-bit unsigned char value 
+// that fits into the ASCII character set.
+inline boolean isAscii(int c)
+{
+  return ( isascii (c) == 0 ? false : true);
+}
+
+
+// Checks for a blank character, that is, a space or a tab.
+inline boolean isWhitespace(int c)
+{
+  return ( isblank (c) == 0 ? false : true);
+}
+
+
+// Checks for a control character.
+inline boolean isControl(int c)
+{
+  return ( iscntrl (c) == 0 ? false : true);
+}
+
+
+// Checks for a digit (0 through 9).
+inline boolean isDigit(int c)
+{
+  return ( isdigit (c) == 0 ? false : true);
+}
+
+
+// Checks for any printable character except space.
+inline boolean isGraph(int c)
+{
+  return ( isgraph (c) == 0 ? false : true);
+}
+
+
+// Checks for a lower-case character.
+inline boolean isLowerCase(int c)
+{
+  return (islower (c) == 0 ? false : true);
+}
+
+
+// Checks for any printable character including space.
+inline boolean isPrintable(int c)
+{
+  return ( isprint (c) == 0 ? false : true);
+}
+
+
+// Checks for any printable character which is not a space 
+// or an alphanumeric character.
+inline boolean isPunct(int c)
+{
+  return ( ispunct (c) == 0 ? false : true);
+}
+
+
+// Checks for white-space characters. For the avr-libc library, 
+// these are: space, formfeed ('\f'), newline ('\n'), carriage 
+// return ('\r'), horizontal tab ('\t'), and vertical tab ('\v').
+inline boolean isSpace(int c)
+{
+  return ( isspace (c) == 0 ? false : true);
+}
+
+
+// Checks for an uppercase letter.
+inline boolean isUpperCase(int c)
+{
+  return ( isupper (c) == 0 ? false : true);
+}
+
+
+// Checks for a hexadecimal digits, i.e. one of 0 1 2 3 4 5 6 7 
+// 8 9 a b c d e f A B C D E F.
+inline boolean isHexadecimalDigit(int c)
+{
+  return ( isxdigit (c) == 0 ? false : true);
+}
+
+
+// Converts c to a 7-bit unsigned char value that fits into the 
+// ASCII character set, by clearing the high-order bits.
+inline int toAscii(int c)
+{
+  return toascii (c);
+}
+
+
+// Warning:
+// Many people will be unhappy if you use this function. 
+// This function will convert accented letters into random 
+// characters.
+
+// Converts the letter c to lower case, if possible.
+inline int toLowerCase(int c)
+{
+  return tolower (c);
+}
+
+
+// Converts the letter c to upper case, if possible.
+inline int toUpperCase(int c)
+{
+  return toupper (c);
+}
+
+#endif

cpu/avr/dev/arduino/WMath.cpp

@@ -0,0 +1,58 @@
+/* -*- mode: jde; c-basic-offset: 2; indent-tabs-mode: nil -*- */
+
+/*
+  Part of the Wiring project - http://wiring.org.co
+  Copyright (c) 2004-06 Hernando Barragan
+  Modified 13 August 2006, David A. Mellis for Arduino - http://www.arduino.cc/
+  
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General
+  Public License along with this library; if not, write to the
+  Free Software Foundation, Inc., 59 Temple Place, Suite 330,
+  Boston, MA  02111-1307  USA
+*/
+
+extern "C" {
+  #include "stdlib.h"
+}
+
+void randomSeed(unsigned long seed)
+{
+  if (seed != 0) {
+    srandom(seed);
+  }
+}
+
+long random(long howbig)
+{
+  if (howbig == 0) {
+    return 0;
+  }
+  return random() % howbig;
+}
+
+long random(long howsmall, long howbig)
+{
+  if (howsmall >= howbig) {
+    return howsmall;
+  }
+  long diff = howbig - howsmall;
+  return random(diff) + howsmall;
+}
+
+long map(long x, long in_min, long in_max, long out_min, long out_max)
+{
+  return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
+}
+
+unsigned int makeWord(unsigned int w) { return w; }
+unsigned int makeWord(unsigned char h, unsigned char l) { return (h << 8) | l; }

cpu/avr/dev/arduino/WString.cpp

@@ -0,0 +1,745 @@
+/*
+  WString.cpp - String library for Wiring & Arduino
+  ...mostly rewritten by Paul Stoffregen...
+  Copyright (c) 2009-10 Hernando Barragan.  All rights reserved.
+  Copyright 2011, Paul Stoffregen, paul@pjrc.com
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#include "WString.h"
+
+/*********************************************/
+/*  Constructors                             */
+/*********************************************/
+
+String::String(const char *cstr)
+{
+	init();
+	if (cstr) copy(cstr, strlen(cstr));
+}
+
+String::String(const String &value)
+{
+	init();
+	*this = value;
+}
+
+String::String(const __FlashStringHelper *pstr)
+{
+	init();
+	*this = pstr;
+}
+
+#if __cplusplus >= 201103L || defined(__GXX_EXPERIMENTAL_CXX0X__)
+String::String(String &&rval)
+{
+	init();
+	move(rval);
+}
+String::String(StringSumHelper &&rval)
+{
+	init();
+	move(rval);
+}
+#endif
+
+String::String(char c)
+{
+	init();
+	char buf[2];
+	buf[0] = c;
+	buf[1] = 0;
+	*this = buf;
+}
+
+String::String(unsigned char value, unsigned char base)
+{
+	init();
+	char buf[1 + 8 * sizeof(unsigned char)];
+	utoa(value, buf, base);
+	*this = buf;
+}
+
+String::String(int value, unsigned char base)
+{
+	init();
+	char buf[2 + 8 * sizeof(int)];
+	itoa(value, buf, base);
+	*this = buf;
+}
+
+String::String(unsigned int value, unsigned char base)
+{
+	init();
+	char buf[1 + 8 * sizeof(unsigned int)];
+	utoa(value, buf, base);
+	*this = buf;
+}
+
+String::String(long value, unsigned char base)
+{
+	init();
+	char buf[2 + 8 * sizeof(long)];
+	ltoa(value, buf, base);
+	*this = buf;
+}
+
+String::String(unsigned long value, unsigned char base)
+{
+	init();
+	char buf[1 + 8 * sizeof(unsigned long)];
+	ultoa(value, buf, base);
+	*this = buf;
+}
+
+String::String(float value, unsigned char decimalPlaces)
+{
+	init();
+	char buf[33];
+	*this = dtostrf(value, (decimalPlaces + 2), decimalPlaces, buf);
+}
+
+String::String(double value, unsigned char decimalPlaces)
+{
+	init();
+	char buf[33];
+	*this = dtostrf(value, (decimalPlaces + 2), decimalPlaces, buf);
+}
+
+String::~String()
+{
+	free(buffer);
+}
+
+/*********************************************/
+/*  Memory Management                        */
+/*********************************************/
+
+inline void String::init(void)
+{
+	buffer = NULL;
+	capacity = 0;
+	len = 0;
+}
+
+void String::invalidate(void)
+{
+	if (buffer) free(buffer);
+	buffer = NULL;
+	capacity = len = 0;
+}
+
+unsigned char String::reserve(unsigned int size)
+{
+	if (buffer && capacity >= size) return 1;
+	if (changeBuffer(size)) {
+		if (len == 0) buffer[0] = 0;
+		return 1;
+	}
+	return 0;
+}
+
+unsigned char String::changeBuffer(unsigned int maxStrLen)
+{
+	char *newbuffer = (char *)realloc(buffer, maxStrLen + 1);
+	if (newbuffer) {
+		buffer = newbuffer;
+		capacity = maxStrLen;
+		return 1;
+	}
+	return 0;
+}
+
+/*********************************************/
+/*  Copy and Move                            */
+/*********************************************/
+
+String & String::copy(const char *cstr, unsigned int length)
+{
+	if (!reserve(length)) {
+		invalidate();
+		return *this;
+	}
+	len = length;
+	strcpy(buffer, cstr);
+	return *this;
+}
+
+String & String::copy(const __FlashStringHelper *pstr, unsigned int length)
+{
+	if (!reserve(length)) {
+		invalidate();
+		return *this;
+	}
+	len = length;
+	strcpy_P(buffer, (PGM_P)pstr);
+	return *this;
+}
+
+#if __cplusplus >= 201103L || defined(__GXX_EXPERIMENTAL_CXX0X__)
+void String::move(String &rhs)
+{
+	if (buffer) {
+		if (capacity >= rhs.len) {
+			strcpy(buffer, rhs.buffer);
+			len = rhs.len;
+			rhs.len = 0;
+			return;
+		} else {
+			free(buffer);
+		}
+	}
+	buffer = rhs.buffer;
+	capacity = rhs.capacity;
+	len = rhs.len;
+	rhs.buffer = NULL;
+	rhs.capacity = 0;
+	rhs.len = 0;
+}
+#endif
+
+String & String::operator = (const String &rhs)
+{
+	if (this == &rhs) return *this;
+	
+	if (rhs.buffer) copy(rhs.buffer, rhs.len);
+	else invalidate();
+	
+	return *this;
+}
+
+#if __cplusplus >= 201103L || defined(__GXX_EXPERIMENTAL_CXX0X__)
+String & String::operator = (String &&rval)
+{
+	if (this != &rval) move(rval);
+	return *this;
+}
+
+String & String::operator = (StringSumHelper &&rval)
+{
+	if (this != &rval) move(rval);
+	return *this;
+}
+#endif
+
+String & String::operator = (const char *cstr)
+{
+	if (cstr) copy(cstr, strlen(cstr));
+	else invalidate();
+	
+	return *this;
+}
+
+String & String::operator = (const __FlashStringHelper *pstr)
+{
+	if (pstr) copy(pstr, strlen_P((PGM_P)pstr));
+	else invalidate();
+
+	return *this;
+}
+
+/*********************************************/
+/*  concat                                   */
+/*********************************************/
+
+unsigned char String::concat(const String &s)
+{
+	return concat(s.buffer, s.len);
+}
+
+unsigned char String::concat(const char *cstr, unsigned int length)
+{
+	unsigned int newlen = len + length;
+	if (!cstr) return 0;
+	if (length == 0) return 1;
+	if (!reserve(newlen)) return 0;
+	strcpy(buffer + len, cstr);
+	len = newlen;
+	return 1;
+}
+
+unsigned char String::concat(const char *cstr)
+{
+	if (!cstr) return 0;
+	return concat(cstr, strlen(cstr));
+}
+
+unsigned char String::concat(char c)
+{
+	char buf[2];
+	buf[0] = c;
+	buf[1] = 0;
+	return concat(buf, 1);
+}
+
+unsigned char String::concat(unsigned char num)
+{
+	char buf[1 + 3 * sizeof(unsigned char)];
+	itoa(num, buf, 10);
+	return concat(buf, strlen(buf));
+}
+
+unsigned char String::concat(int num)
+{
+	char buf[2 + 3 * sizeof(int)];
+	itoa(num, buf, 10);
+	return concat(buf, strlen(buf));
+}
+
+unsigned char String::concat(unsigned int num)
+{
+	char buf[1 + 3 * sizeof(unsigned int)];
+	utoa(num, buf, 10);
+	return concat(buf, strlen(buf));
+}
+
+unsigned char String::concat(long num)
+{
+	char buf[2 + 3 * sizeof(long)];
+	ltoa(num, buf, 10);
+	return concat(buf, strlen(buf));
+}
+
+unsigned char String::concat(unsigned long num)
+{
+	char buf[1 + 3 * sizeof(unsigned long)];
+	ultoa(num, buf, 10);
+	return concat(buf, strlen(buf));
+}
+
+unsigned char String::concat(float num)
+{
+	char buf[20];
+	char* string = dtostrf(num, 4, 2, buf);
+	return concat(string, strlen(string));
+}
+
+unsigned char String::concat(double num)
+{
+	char buf[20];
+	char* string = dtostrf(num, 4, 2, buf);
+	return concat(string, strlen(string));
+}
+
+unsigned char String::concat(const __FlashStringHelper * str)
+{
+	if (!str) return 0;
+	int length = strlen_P((const char *) str);
+	if (length == 0) return 1;
+	unsigned int newlen = len + length;
+	if (!reserve(newlen)) return 0;
+	strcpy_P(buffer + len, (const char *) str);
+	len = newlen;
+	return 1;
+}
+
+/*********************************************/
+/*  Concatenate                              */
+/*********************************************/
+
+StringSumHelper & operator + (const StringSumHelper &lhs, const String &rhs)
+{
+	StringSumHelper &a = const_cast<StringSumHelper&>(lhs);
+	if (!a.concat(rhs.buffer, rhs.len)) a.invalidate();
+	return a;
+}
+
+StringSumHelper & operator + (const StringSumHelper &lhs, const char *cstr)
+{
+	StringSumHelper &a = const_cast<StringSumHelper&>(lhs);
+	if (!cstr || !a.concat(cstr, strlen(cstr))) a.invalidate();
+	return a;
+}
+
+StringSumHelper & operator + (const StringSumHelper &lhs, char c)
+{
+	StringSumHelper &a = const_cast<StringSumHelper&>(lhs);
+	if (!a.concat(c)) a.invalidate();
+	return a;
+}
+
+StringSumHelper & operator + (const StringSumHelper &lhs, unsigned char num)
+{
+	StringSumHelper &a = const_cast<StringSumHelper&>(lhs);
+	if (!a.concat(num)) a.invalidate();
+	return a;
+}
+
+StringSumHelper & operator + (const StringSumHelper &lhs, int num)
+{
+	StringSumHelper &a = const_cast<StringSumHelper&>(lhs);
+	if (!a.concat(num)) a.invalidate();
+	return a;
+}
+
+StringSumHelper & operator + (const StringSumHelper &lhs, unsigned int num)
+{
+	StringSumHelper &a = const_cast<StringSumHelper&>(lhs);
+	if (!a.concat(num)) a.invalidate();
+	return a;
+}
+
+StringSumHelper & operator + (const StringSumHelper &lhs, long num)
+{
+	StringSumHelper &a = const_cast<StringSumHelper&>(lhs);
+	if (!a.concat(num)) a.invalidate();
+	return a;
+}
+
+StringSumHelper & operator + (const StringSumHelper &lhs, unsigned long num)
+{
+	StringSumHelper &a = const_cast<StringSumHelper&>(lhs);
+	if (!a.concat(num)) a.invalidate();
+	return a;
+}
+
+StringSumHelper & operator + (const StringSumHelper &lhs, float num)
+{
+	StringSumHelper &a = const_cast<StringSumHelper&>(lhs);
+	if (!a.concat(num)) a.invalidate();
+	return a;
+}
+
+StringSumHelper & operator + (const StringSumHelper &lhs, double num)
+{
+	StringSumHelper &a = const_cast<StringSumHelper&>(lhs);
+	if (!a.concat(num)) a.invalidate();
+	return a;
+}
+
+StringSumHelper & operator + (const StringSumHelper &lhs, const __FlashStringHelper *rhs)
+{
+	StringSumHelper &a = const_cast<StringSumHelper&>(lhs);
+	if (!a.concat(rhs))	a.invalidate();
+	return a;
+}
+
+/*********************************************/
+/*  Comparison                               */
+/*********************************************/
+
+int String::compareTo(const String &s) const
+{
+	if (!buffer || !s.buffer) {
+		if (s.buffer && s.len > 0) return 0 - *(unsigned char *)s.buffer;
+		if (buffer && len > 0) return *(unsigned char *)buffer;
+		return 0;
+	}
+	return strcmp(buffer, s.buffer);
+}
+
+unsigned char String::equals(const String &s2) const
+{
+	return (len == s2.len && compareTo(s2) == 0);
+}
+
+unsigned char String::equals(const char *cstr) const
+{
+	if (len == 0) return (cstr == NULL || *cstr == 0);
+	if (cstr == NULL) return buffer[0] == 0;
+	return strcmp(buffer, cstr) == 0;
+}
+
+unsigned char String::operator<(const String &rhs) const
+{
+	return compareTo(rhs) < 0;
+}
+
+unsigned char String::operator>(const String &rhs) const
+{
+	return compareTo(rhs) > 0;
+}
+
+unsigned char String::operator<=(const String &rhs) const
+{
+	return compareTo(rhs) <= 0;
+}
+
+unsigned char String::operator>=(const String &rhs) const
+{
+	return compareTo(rhs) >= 0;
+}
+
+unsigned char String::equalsIgnoreCase( const String &s2 ) const
+{
+	if (this == &s2) return 1;
+	if (len != s2.len) return 0;
+	if (len == 0) return 1;
+	const char *p1 = buffer;
+	const char *p2 = s2.buffer;
+	while (*p1) {
+		if (tolower(*p1++) != tolower(*p2++)) return 0;
+	} 
+	return 1;
+}
+
+unsigned char String::startsWith( const String &s2 ) const
+{
+	if (len < s2.len) return 0;
+	return startsWith(s2, 0);
+}
+
+unsigned char String::startsWith( const String &s2, unsigned int offset ) const
+{
+	if (offset > len - s2.len || !buffer || !s2.buffer) return 0;
+	return strncmp( &buffer[offset], s2.buffer, s2.len ) == 0;
+}
+
+unsigned char String::endsWith( const String &s2 ) const
+{
+	if ( len < s2.len || !buffer || !s2.buffer) return 0;
+	return strcmp(&buffer[len - s2.len], s2.buffer) == 0;
+}
+
+/*********************************************/
+/*  Character Access                         */
+/*********************************************/
+
+char String::charAt(unsigned int loc) const
+{
+	return operator[](loc);
+}
+
+void String::setCharAt(unsigned int loc, char c) 
+{
+	if (loc < len) buffer[loc] = c;
+}
+
+char & String::operator[](unsigned int index)
+{
+	static char dummy_writable_char;
+	if (index >= len || !buffer) {
+		dummy_writable_char = 0;
+		return dummy_writable_char;
+	}
+	return buffer[index];
+}
+
+char String::operator[]( unsigned int index ) const
+{
+	if (index >= len || !buffer) return 0;
+	return buffer[index];
+}
+
+void String::getBytes(unsigned char *buf, unsigned int bufsize, unsigned int index) const
+{
+	if (!bufsize || !buf) return;
+	if (index >= len) {
+		buf[0] = 0;
+		return;
+	}
+	unsigned int n = bufsize - 1;
+	if (n > len - index) n = len - index;
+	strncpy((char *)buf, buffer + index, n);
+	buf[n] = 0;
+}
+
+/*********************************************/
+/*  Search                                   */
+/*********************************************/
+
+int String::indexOf(char c) const
+{
+	return indexOf(c, 0);
+}
+
+int String::indexOf( char ch, unsigned int fromIndex ) const
+{
+	if (fromIndex >= len) return -1;
+	const char* temp = strchr(buffer + fromIndex, ch);
+	if (temp == NULL) return -1;
+	return temp - buffer;
+}
+
+int String::indexOf(const String &s2) const
+{
+	return indexOf(s2, 0);
+}
+
+int String::indexOf(const String &s2, unsigned int fromIndex) const
+{
+	if (fromIndex >= len) return -1;
+	const char *found = strstr(buffer + fromIndex, s2.buffer);
+	if (found == NULL) return -1;
+	return found - buffer;
+}
+
+int String::lastIndexOf( char theChar ) const
+{
+	return lastIndexOf(theChar, len - 1);
+}
+
+int String::lastIndexOf(char ch, unsigned int fromIndex) const
+{
+	if (fromIndex >= len) return -1;
+	char tempchar = buffer[fromIndex + 1];
+	buffer[fromIndex + 1] = '\0';
+	char* temp = strrchr( buffer, ch );
+	buffer[fromIndex + 1] = tempchar;
+	if (temp == NULL) return -1;
+	return temp - buffer;
+}
+
+int String::lastIndexOf(const String &s2) const
+{
+	return lastIndexOf(s2, len - s2.len);
+}
+
+int String::lastIndexOf(const String &s2, unsigned int fromIndex) const
+{
+  	if (s2.len == 0 || len == 0 || s2.len > len) return -1;
+	if (fromIndex >= len) fromIndex = len - 1;
+	int found = -1;
+	for (char *p = buffer; p <= buffer + fromIndex; p++) {
+		p = strstr(p, s2.buffer);
+		if (!p) break;
+		if ((unsigned int)(p - buffer) <= fromIndex) found = p - buffer;
+	}
+	return found;
+}
+
+String String::substring(unsigned int left, unsigned int right) const
+{
+	if (left > right) {
+		unsigned int temp = right;
+		right = left;
+		left = temp;
+	}
+	String out;
+	if (left >= len) return out;
+	if (right > len) right = len;
+	char temp = buffer[right];  // save the replaced character
+	buffer[right] = '\0';	
+	out = buffer + left;  // pointer arithmetic
+	buffer[right] = temp;  //restore character
+	return out;
+}
+
+/*********************************************/
+/*  Modification                             */
+/*********************************************/
+
+void String::replace(char find, char replace)
+{
+	if (!buffer) return;
+	for (char *p = buffer; *p; p++) {
+		if (*p == find) *p = replace;
+	}
+}
+
+void String::replace(const String& find, const String& replace)
+{
+	if (len == 0 || find.len == 0) return;
+	int diff = replace.len - find.len;
+	char *readFrom = buffer;
+	char *foundAt;
+	if (diff == 0) {
+		while ((foundAt = strstr(readFrom, find.buffer)) != NULL) {
+			memcpy(foundAt, replace.buffer, replace.len);
+			readFrom = foundAt + replace.len;
+		}
+	} else if (diff < 0) {
+		char *writeTo = buffer;
+		while ((foundAt = strstr(readFrom, find.buffer)) != NULL) {
+			unsigned int n = foundAt - readFrom;
+			memcpy(writeTo, readFrom, n);
+			writeTo += n;
+			memcpy(writeTo, replace.buffer, replace.len);
+			writeTo += replace.len;
+			readFrom = foundAt + find.len;
+			len += diff;
+		}
+		strcpy(writeTo, readFrom);
+	} else {
+		unsigned int size = len; // compute size needed for result
+		while ((foundAt = strstr(readFrom, find.buffer)) != NULL) {
+			readFrom = foundAt + find.len;
+			size += diff;
+		}
+		if (size == len) return;
+		if (size > capacity && !changeBuffer(size)) return; // XXX: tell user!
+		int index = len - 1;
+		while (index >= 0 && (index = lastIndexOf(find, index)) >= 0) {
+			readFrom = buffer + index + find.len;
+			memmove(readFrom + diff, readFrom, len - (readFrom - buffer));
+			len += diff;
+			buffer[len] = 0;
+			memcpy(buffer + index, replace.buffer, replace.len);
+			index--;
+		}
+	}
+}
+
+void String::remove(unsigned int index){
+	// Pass the biggest integer as the count. The remove method
+	// below will take care of truncating it at the end of the
+	// string.
+	remove(index, (unsigned int)-1);
+}
+
+void String::remove(unsigned int index, unsigned int count){
+	if (index >= len) { return; }
+	if (count <= 0) { return; }
+	if (count > len - index) { count = len - index; }
+	char *writeTo = buffer + index;
+	len = len - count;
+	strncpy(writeTo, buffer + index + count,len - index);
+	buffer[len] = 0;
+}
+
+void String::toLowerCase(void)
+{
+	if (!buffer) return;
+	for (char *p = buffer; *p; p++) {
+		*p = tolower(*p);
+	}
+}
+
+void String::toUpperCase(void)
+{
+	if (!buffer) return;
+	for (char *p = buffer; *p; p++) {
+		*p = toupper(*p);
+	}
+}
+
+void String::trim(void)
+{
+	if (!buffer || len == 0) return;
+	char *begin = buffer;
+	while (isspace(*begin)) begin++;
+	char *end = buffer + len - 1;
+	while (isspace(*end) && end >= begin) end--;
+	len = end + 1 - begin;
+	if (begin > buffer) memcpy(buffer, begin, len);
+	buffer[len] = 0;
+}
+
+/*********************************************/
+/*  Parsing / Conversion                     */
+/*********************************************/
+
+long String::toInt(void) const
+{
+	if (buffer) return atol(buffer);
+	return 0;
+}
+
+float String::toFloat(void) const
+{
+	if (buffer) return float(atof(buffer));
+	return 0;
+}

cpu/avr/dev/arduino/WString.h

@@ -0,0 +1,224 @@
+/*
+  WString.h - String library for Wiring & Arduino
+  ...mostly rewritten by Paul Stoffregen...
+  Copyright (c) 2009-10 Hernando Barragan.  All right reserved.
+  Copyright 2011, Paul Stoffregen, paul@pjrc.com
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#ifndef String_class_h
+#define String_class_h
+#ifdef __cplusplus
+
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <avr/pgmspace.h>
+
+// When compiling programs with this class, the following gcc parameters
+// dramatically increase performance and memory (RAM) efficiency, typically
+// with little or no increase in code size.
+//     -felide-constructors
+//     -std=c++0x
+
+class __FlashStringHelper;
+#define F(string_literal) (reinterpret_cast<const __FlashStringHelper *>(PSTR(string_literal)))
+
+// An inherited class for holding the result of a concatenation.  These
+// result objects are assumed to be writable by subsequent concatenations.
+class StringSumHelper;
+
+// The string class
+class String
+{
+	// use a function pointer to allow for "if (s)" without the
+	// complications of an operator bool(). for more information, see:
+	// http://www.artima.com/cppsource/safebool.html
+	typedef void (String::*StringIfHelperType)() const;
+	void StringIfHelper() const {}
+
+public:
+	// constructors
+	// creates a copy of the initial value.
+	// if the initial value is null or invalid, or if memory allocation
+	// fails, the string will be marked as invalid (i.e. "if (s)" will
+	// be false).
+	String(const char *cstr = "");
+	String(const String &str);
+	String(const __FlashStringHelper *str);
+       #if __cplusplus >= 201103L || defined(__GXX_EXPERIMENTAL_CXX0X__)
+	String(String &&rval);
+	String(StringSumHelper &&rval);
+	#endif
+	explicit String(char c);
+	explicit String(unsigned char, unsigned char base=10);
+	explicit String(int, unsigned char base=10);
+	explicit String(unsigned int, unsigned char base=10);
+	explicit String(long, unsigned char base=10);
+	explicit String(unsigned long, unsigned char base=10);
+	explicit String(float, unsigned char decimalPlaces=2);
+	explicit String(double, unsigned char decimalPlaces=2);
+	~String(void);
+
+	// memory management
+	// return true on success, false on failure (in which case, the string
+	// is left unchanged).  reserve(0), if successful, will validate an
+	// invalid string (i.e., "if (s)" will be true afterwards)
+	unsigned char reserve(unsigned int size);
+	inline unsigned int length(void) const {return len;}
+
+	// creates a copy of the assigned value.  if the value is null or
+	// invalid, or if the memory allocation fails, the string will be 
+	// marked as invalid ("if (s)" will be false).
+	String & operator = (const String &rhs);
+	String & operator = (const char *cstr);
+	String & operator = (const __FlashStringHelper *str);
+       #if __cplusplus >= 201103L || defined(__GXX_EXPERIMENTAL_CXX0X__)
+	String & operator = (String &&rval);
+	String & operator = (StringSumHelper &&rval);
+	#endif
+
+	// concatenate (works w/ built-in types)
+	
+	// returns true on success, false on failure (in which case, the string
+	// is left unchanged).  if the argument is null or invalid, the 
+	// concatenation is considered unsucessful.  
+	unsigned char concat(const String &str);
+	unsigned char concat(const char *cstr);
+	unsigned char concat(char c);
+	unsigned char concat(unsigned char c);
+	unsigned char concat(int num);
+	unsigned char concat(unsigned int num);
+	unsigned char concat(long num);
+	unsigned char concat(unsigned long num);
+	unsigned char concat(float num);
+	unsigned char concat(double num);
+	unsigned char concat(const __FlashStringHelper * str);
+	
+	// if there's not enough memory for the concatenated value, the string
+	// will be left unchanged (but this isn't signalled in any way)
+	String & operator += (const String &rhs)	{concat(rhs); return (*this);}
+	String & operator += (const char *cstr)		{concat(cstr); return (*this);}
+	String & operator += (char c)			{concat(c); return (*this);}
+	String & operator += (unsigned char num)		{concat(num); return (*this);}
+	String & operator += (int num)			{concat(num); return (*this);}
+	String & operator += (unsigned int num)		{concat(num); return (*this);}
+	String & operator += (long num)			{concat(num); return (*this);}
+	String & operator += (unsigned long num)	{concat(num); return (*this);}
+	String & operator += (float num)		{concat(num); return (*this);}
+	String & operator += (double num)		{concat(num); return (*this);}
+	String & operator += (const __FlashStringHelper *str){concat(str); return (*this);}
+
+	friend StringSumHelper & operator + (const StringSumHelper &lhs, const String &rhs);
+	friend StringSumHelper & operator + (const StringSumHelper &lhs, const char *cstr);
+	friend StringSumHelper & operator + (const StringSumHelper &lhs, char c);
+	friend StringSumHelper & operator + (const StringSumHelper &lhs, unsigned char num);
+	friend StringSumHelper & operator + (const StringSumHelper &lhs, int num);
+	friend StringSumHelper & operator + (const StringSumHelper &lhs, unsigned int num);
+	friend StringSumHelper & operator + (const StringSumHelper &lhs, long num);
+	friend StringSumHelper & operator + (const StringSumHelper &lhs, unsigned long num);
+	friend StringSumHelper & operator + (const StringSumHelper &lhs, float num);
+	friend StringSumHelper & operator + (const StringSumHelper &lhs, double num);
+	friend StringSumHelper & operator + (const StringSumHelper &lhs, const __FlashStringHelper *rhs);
+
+	// comparison (only works w/ Strings and "strings")
+	operator StringIfHelperType() const { return buffer ? &String::StringIfHelper : 0; }
+	int compareTo(const String &s) const;
+	unsigned char equals(const String &s) const;
+	unsigned char equals(const char *cstr) const;
+	unsigned char operator == (const String &rhs) const {return equals(rhs);}
+	unsigned char operator == (const char *cstr) const {return equals(cstr);}
+	unsigned char operator != (const String &rhs) const {return !equals(rhs);}
+	unsigned char operator != (const char *cstr) const {return !equals(cstr);}
+	unsigned char operator <  (const String &rhs) const;
+	unsigned char operator >  (const String &rhs) const;
+	unsigned char operator <= (const String &rhs) const;
+	unsigned char operator >= (const String &rhs) const;
+	unsigned char equalsIgnoreCase(const String &s) const;
+	unsigned char startsWith( const String &prefix) const;
+	unsigned char startsWith(const String &prefix, unsigned int offset) const;
+	unsigned char endsWith(const String &suffix) const;
+
+	// character acccess
+	char charAt(unsigned int index) const;
+	void setCharAt(unsigned int index, char c);
+	char operator [] (unsigned int index) const;
+	char& operator [] (unsigned int index);
+	void getBytes(unsigned char *buf, unsigned int bufsize, unsigned int index=0) const;
+	void toCharArray(char *buf, unsigned int bufsize, unsigned int index=0) const
+		{getBytes((unsigned char *)buf, bufsize, index);}
+	const char * c_str() const { return buffer; }
+
+	// search
+	int indexOf( char ch ) const;
+	int indexOf( char ch, unsigned int fromIndex ) const;
+	int indexOf( const String &str ) const;
+	int indexOf( const String &str, unsigned int fromIndex ) const;
+	int lastIndexOf( char ch ) const;
+	int lastIndexOf( char ch, unsigned int fromIndex ) const;
+	int lastIndexOf( const String &str ) const;
+	int lastIndexOf( const String &str, unsigned int fromIndex ) const;
+	String substring( unsigned int beginIndex ) const { return substring(beginIndex, len); };
+	String substring( unsigned int beginIndex, unsigned int endIndex ) const;
+
+	// modification
+	void replace(char find, char replace);
+	void replace(const String& find, const String& replace);
+	void remove(unsigned int index);
+	void remove(unsigned int index, unsigned int count);
+	void toLowerCase(void);
+	void toUpperCase(void);
+	void trim(void);
+
+	// parsing/conversion
+	long toInt(void) const;
+	float toFloat(void) const;
+
+protected:
+	char *buffer;	        // the actual char array
+	unsigned int capacity;  // the array length minus one (for the '\0')
+	unsigned int len;       // the String length (not counting the '\0')
+protected:
+	void init(void);
+	void invalidate(void);
+	unsigned char changeBuffer(unsigned int maxStrLen);
+	unsigned char concat(const char *cstr, unsigned int length);
+
+	// copy and move
+	String & copy(const char *cstr, unsigned int length);
+	String & copy(const __FlashStringHelper *pstr, unsigned int length);
+       #if __cplusplus >= 201103L || defined(__GXX_EXPERIMENTAL_CXX0X__)
+	void move(String &rhs);
+	#endif
+};
+
+class StringSumHelper : public String
+{
+public:
+	StringSumHelper(const String &s) : String(s) {}
+	StringSumHelper(const char *p) : String(p) {}
+	StringSumHelper(char c) : String(c) {}
+	StringSumHelper(unsigned char num) : String(num) {}
+	StringSumHelper(int num) : String(num) {}
+	StringSumHelper(unsigned int num) : String(num) {}
+	StringSumHelper(long num) : String(num) {}
+	StringSumHelper(unsigned long num) : String(num) {}
+	StringSumHelper(float num) : String(num) {}
+	StringSumHelper(double num) : String(num) {}
+};
+
+#endif  // __cplusplus
+#endif  // String_class_h

cpu/avr/dev/arduino/Wire.cpp

@@ -0,0 +1,330 @@
+/*
+  TwoWire.cpp - TWI/I2C library for Wiring & Arduino
+  Copyright (c) 2006 Nicholas Zambetti.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ 
+  Modified 2012 by Todd Krein (todd@krein.org) to implement repeated starts
+*/
+
+extern "C" {
+  #include <stdlib.h>
+  #include <string.h>
+  #include <inttypes.h>
+  #include "twi.h"
+}
+
+#include "Wire.h"
+
+// Initialize Class Variables //////////////////////////////////////////////////
+
+uint8_t TwoWire::rxBuffer[BUFFER_LENGTH];
+uint8_t TwoWire::rxBufferIndex = 0;
+uint8_t TwoWire::rxBufferLength = 0;
+
+uint8_t TwoWire::txAddress = 0;
+uint8_t TwoWire::txBuffer[BUFFER_LENGTH];
+uint8_t TwoWire::txBufferIndex = 0;
+uint8_t TwoWire::txBufferLength = 0;
+
+uint8_t TwoWire::transmitting = 0;
+void (*TwoWire::user_onRequest)(void);
+void (*TwoWire::user_onReceive)(int);
+
+// Constructors ////////////////////////////////////////////////////////////////
+
+TwoWire::TwoWire()
+{
+}
+
+// Public Methods //////////////////////////////////////////////////////////////
+
+void TwoWire::begin(void)
+{
+  rxBufferIndex = 0;
+  rxBufferLength = 0;
+
+  txBufferIndex = 0;
+  txBufferLength = 0;
+
+  twi_init();
+}
+
+void TwoWire::begin(uint8_t address)
+{
+  twi_setAddress(address);
+  twi_attachSlaveTxEvent(onRequestService);
+  twi_attachSlaveRxEvent(onReceiveService);
+  begin();
+}
+
+void TwoWire::begin(int address)
+{
+  begin((uint8_t)address);
+}
+
+void TwoWire::end(void)
+{
+  twi_disable();
+}
+
+void TwoWire::setClock(uint32_t frequency)
+{
+  TWBR = ((F_CPU / frequency) - 16) / 2;
+}
+
+uint8_t TwoWire::requestFrom(uint8_t address, uint8_t quantity, uint32_t iaddress, uint8_t isize, uint8_t sendStop)
+{
+  if (isize > 0) {
+  // send internal address; this mode allows sending a repeated start to access
+  // some devices' internal registers. This function is executed by the hardware
+  // TWI module on other processors (for example Due's TWI_IADR and TWI_MMR registers)
+
+  beginTransmission(address);
+
+  // the maximum size of internal address is 3 bytes
+  if (isize > 3){
+    isize = 3;
+  }
+
+  // write internal register address - most significant byte first
+  while (isize-- > 0)
+    write((uint8_t)(iaddress >> (isize*8)));
+  endTransmission(false);
+  }
+
+  // clamp to buffer length
+  if(quantity > BUFFER_LENGTH){
+    quantity = BUFFER_LENGTH;
+  }
+  // perform blocking read into buffer
+  uint8_t read = twi_readFrom(address, rxBuffer, quantity, sendStop);
+  // set rx buffer iterator vars
+  rxBufferIndex = 0;
+  rxBufferLength = read;
+
+  return read;
+}
+
+uint8_t TwoWire::requestFrom(uint8_t address, uint8_t quantity, uint8_t sendStop) {
+	return requestFrom((uint8_t)address, (uint8_t)quantity, (uint32_t)0, (uint8_t)0, (uint8_t)sendStop);
+}
+
+uint8_t TwoWire::requestFrom(uint8_t address, uint8_t quantity)
+{
+  return requestFrom((uint8_t)address, (uint8_t)quantity, (uint8_t)true);
+}
+
+uint8_t TwoWire::requestFrom(int address, int quantity)
+{
+  return requestFrom((uint8_t)address, (uint8_t)quantity, (uint8_t)true);
+}
+
+uint8_t TwoWire::requestFrom(int address, int quantity, int sendStop)
+{
+  return requestFrom((uint8_t)address, (uint8_t)quantity, (uint8_t)sendStop);
+}
+
+void TwoWire::beginTransmission(uint8_t address)
+{
+  // indicate that we are transmitting
+  transmitting = 1;
+  // set address of targeted slave
+  txAddress = address;
+  // reset tx buffer iterator vars
+  txBufferIndex = 0;
+  txBufferLength = 0;
+}
+
+void TwoWire::beginTransmission(int address)
+{
+  beginTransmission((uint8_t)address);
+}
+
+//
+//	Originally, 'endTransmission' was an f(void) function.
+//	It has been modified to take one parameter indicating
+//	whether or not a STOP should be performed on the bus.
+//	Calling endTransmission(false) allows a sketch to 
+//	perform a repeated start. 
+//
+//	WARNING: Nothing in the library keeps track of whether
+//	the bus tenure has been properly ended with a STOP. It
+//	is very possible to leave the bus in a hung state if
+//	no call to endTransmission(true) is made. Some I2C
+//	devices will behave oddly if they do not see a STOP.
+//
+uint8_t TwoWire::endTransmission(uint8_t sendStop)
+{
+  // transmit buffer (blocking)
+  int8_t ret = twi_writeTo(txAddress, txBuffer, txBufferLength, 1, sendStop);
+  // reset tx buffer iterator vars
+  txBufferIndex = 0;
+  txBufferLength = 0;
+  // indicate that we are done transmitting
+  transmitting = 0;
+  return ret;
+}
+
+//	This provides backwards compatibility with the original
+//	definition, and expected behaviour, of endTransmission
+//
+uint8_t TwoWire::endTransmission(void)
+{
+  return endTransmission(true);
+}
+
+// must be called in:
+// slave tx event callback
+// or after beginTransmission(address)
+size_t TwoWire::write(uint8_t data)
+{
+  if(transmitting){
+  // in master transmitter mode
+    // don't bother if buffer is full
+    if(txBufferLength >= BUFFER_LENGTH){
+      setWriteError();
+      return 0;
+    }
+    // put byte in tx buffer
+    txBuffer[txBufferIndex] = data;
+    ++txBufferIndex;
+    // update amount in buffer   
+    txBufferLength = txBufferIndex;
+  }else{
+  // in slave send mode
+    // reply to master
+    twi_transmit(&data, 1);
+  }
+  return 1;
+}
+
+// must be called in:
+// slave tx event callback
+// or after beginTransmission(address)
+size_t TwoWire::write(const uint8_t *data, size_t quantity)
+{
+  if(transmitting){
+  // in master transmitter mode
+    for(size_t i = 0; i < quantity; ++i){
+      write(data[i]);
+    }
+  }else{
+  // in slave send mode
+    // reply to master
+    twi_transmit(data, quantity);
+  }
+  return quantity;
+}
+
+// must be called in:
+// slave rx event callback
+// or after requestFrom(address, numBytes)
+int TwoWire::available(void)
+{
+  return rxBufferLength - rxBufferIndex;
+}
+
+// must be called in:
+// slave rx event callback
+// or after requestFrom(address, numBytes)
+int TwoWire::read(void)
+{
+  int value = -1;
+  
+  // get each successive byte on each call
+  if(rxBufferIndex < rxBufferLength){
+    value = rxBuffer[rxBufferIndex];
+    ++rxBufferIndex;
+  }
+
+  return value;
+}
+
+// must be called in:
+// slave rx event callback
+// or after requestFrom(address, numBytes)
+int TwoWire::peek(void)
+{
+  int value = -1;
+  
+  if(rxBufferIndex < rxBufferLength){
+    value = rxBuffer[rxBufferIndex];
+  }
+
+  return value;
+}
+
+void TwoWire::flush(void)
+{
+  // XXX: to be implemented.
+}
+
+// behind the scenes function that is called when data is received
+void TwoWire::onReceiveService(uint8_t* inBytes, int numBytes)
+{
+  // don't bother if user hasn't registered a callback
+  if(!user_onReceive){
+    return;
+  }
+  // don't bother if rx buffer is in use by a master requestFrom() op
+  // i know this drops data, but it allows for slight stupidity
+  // meaning, they may not have read all the master requestFrom() data yet
+  if(rxBufferIndex < rxBufferLength){
+    return;
+  }
+  // copy twi rx buffer into local read buffer
+  // this enables new reads to happen in parallel
+  for(uint8_t i = 0; i < numBytes; ++i){
+    rxBuffer[i] = inBytes[i];    
+  }
+  // set rx iterator vars
+  rxBufferIndex = 0;
+  rxBufferLength = numBytes;
+  // alert user program
+  user_onReceive(numBytes);
+}
+
+// behind the scenes function that is called when data is requested
+void TwoWire::onRequestService(void)
+{
+  // don't bother if user hasn't registered a callback
+  if(!user_onRequest){
+    return;
+  }
+  // reset tx buffer iterator vars
+  // !!! this will kill any pending pre-master sendTo() activity
+  txBufferIndex = 0;
+  txBufferLength = 0;
+  // alert user program
+  user_onRequest();
+}
+
+// sets function called on slave write
+void TwoWire::onReceive( void (*function)(int) )
+{
+  user_onReceive = function;
+}
+
+// sets function called on slave read
+void TwoWire::onRequest( void (*function)(void) )
+{
+  user_onRequest = function;
+}
+
+// Preinstantiate Objects //////////////////////////////////////////////////////
+
+TwoWire Wire = TwoWire();
+

cpu/avr/dev/arduino/Wire.h

@@ -0,0 +1,85 @@
+/*
+  TwoWire.h - TWI/I2C library for Arduino & Wiring
+  Copyright (c) 2006 Nicholas Zambetti.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+  Modified 2012 by Todd Krein (todd@krein.org) to implement repeated starts
+*/
+
+#ifndef TwoWire_h
+#define TwoWire_h
+
+#include <inttypes.h>
+#include "Stream.h"
+
+#define BUFFER_LENGTH 32
+
+// WIRE_HAS_END means Wire has end()
+#define WIRE_HAS_END 1
+
+class TwoWire : public Stream
+{
+  private:
+    static uint8_t rxBuffer[];
+    static uint8_t rxBufferIndex;
+    static uint8_t rxBufferLength;
+
+    static uint8_t txAddress;
+    static uint8_t txBuffer[];
+    static uint8_t txBufferIndex;
+    static uint8_t txBufferLength;
+
+    static uint8_t transmitting;
+    static void (*user_onRequest)(void);
+    static void (*user_onReceive)(int);
+    static void onRequestService(void);
+    static void onReceiveService(uint8_t*, int);
+  public:
+    TwoWire();
+    void begin();
+    void begin(uint8_t);
+    void begin(int);
+    void end();
+    void setClock(uint32_t);
+    void beginTransmission(uint8_t);
+    void beginTransmission(int);
+    uint8_t endTransmission(void);
+    uint8_t endTransmission(uint8_t);
+    uint8_t requestFrom(uint8_t, uint8_t);
+    uint8_t requestFrom(uint8_t, uint8_t, uint8_t);
+	uint8_t requestFrom(uint8_t, uint8_t, uint32_t, uint8_t, uint8_t);
+    uint8_t requestFrom(int, int);
+    uint8_t requestFrom(int, int, int);
+    virtual size_t write(uint8_t);
+    virtual size_t write(const uint8_t *, size_t);
+    virtual int available(void);
+    virtual int read(void);
+    virtual int peek(void);
+    virtual void flush(void);
+    void onReceive( void (*)(int) );
+    void onRequest( void (*)(void) );
+
+    inline size_t write(unsigned long n) { return write((uint8_t)n); }
+    inline size_t write(long n) { return write((uint8_t)n); }
+    inline size_t write(unsigned int n) { return write((uint8_t)n); }
+    inline size_t write(int n) { return write((uint8_t)n); }
+    using Print::write;
+};
+
+extern TwoWire Wire;
+
+#endif
+

cpu/avr/dev/arduino/binary.h

@@ -0,0 +1,515 @@
+#ifndef Binary_h
+#define Binary_h
+
+#define B0 0
+#define B00 0
+#define B000 0
+#define B0000 0
+#define B00000 0
+#define B000000 0
+#define B0000000 0
+#define B00000000 0
+#define B1 1
+#define B01 1
+#define B001 1
+#define B0001 1
+#define B00001 1
+#define B000001 1
+#define B0000001 1
+#define B00000001 1
+#define B10 2
+#define B010 2
+#define B0010 2
+#define B00010 2
+#define B000010 2
+#define B0000010 2
+#define B00000010 2
+#define B11 3
+#define B011 3
+#define B0011 3
+#define B00011 3
+#define B000011 3
+#define B0000011 3
+#define B00000011 3
+#define B100 4
+#define B0100 4
+#define B00100 4
+#define B000100 4
+#define B0000100 4
+#define B00000100 4
+#define B101 5
+#define B0101 5
+#define B00101 5
+#define B000101 5
+#define B0000101 5
+#define B00000101 5
+#define B110 6
+#define B0110 6
+#define B00110 6
+#define B000110 6
+#define B0000110 6
+#define B00000110 6
+#define B111 7
+#define B0111 7
+#define B00111 7
+#define B000111 7
+#define B0000111 7
+#define B00000111 7
+#define B1000 8
+#define B01000 8
+#define B001000 8
+#define B0001000 8
+#define B00001000 8
+#define B1001 9
+#define B01001 9
+#define B001001 9
+#define B0001001 9
+#define B00001001 9
+#define B1010 10
+#define B01010 10
+#define B001010 10
+#define B0001010 10
+#define B00001010 10
+#define B1011 11
+#define B01011 11
+#define B001011 11
+#define B0001011 11
+#define B00001011 11
+#define B1100 12
+#define B01100 12
+#define B001100 12
+#define B0001100 12
+#define B00001100 12
+#define B1101 13
+#define B01101 13
+#define B001101 13
+#define B0001101 13
+#define B00001101 13
+#define B1110 14
+#define B01110 14
+#define B001110 14
+#define B0001110 14
+#define B00001110 14
+#define B1111 15
+#define B01111 15
+#define B001111 15
+#define B0001111 15
+#define B00001111 15
+#define B10000 16
+#define B010000 16
+#define B0010000 16
+#define B00010000 16
+#define B10001 17
+#define B010001 17
+#define B0010001 17
+#define B00010001 17
+#define B10010 18
+#define B010010 18
+#define B0010010 18
+#define B00010010 18
+#define B10011 19
+#define B010011 19
+#define B0010011 19
+#define B00010011 19
+#define B10100 20
+#define B010100 20
+#define B0010100 20
+#define B00010100 20
+#define B10101 21
+#define B010101 21
+#define B0010101 21
+#define B00010101 21
+#define B10110 22
+#define B010110 22
+#define B0010110 22
+#define B00010110 22
+#define B10111 23
+#define B010111 23
+#define B0010111 23
+#define B00010111 23
+#define B11000 24
+#define B011000 24
+#define B0011000 24
+#define B00011000 24
+#define B11001 25
+#define B011001 25
+#define B0011001 25
+#define B00011001 25
+#define B11010 26
+#define B011010 26
+#define B0011010 26
+#define B00011010 26
+#define B11011 27
+#define B011011 27
+#define B0011011 27
+#define B00011011 27
+#define B11100 28
+#define B011100 28
+#define B0011100 28
+#define B00011100 28
+#define B11101 29
+#define B011101 29
+#define B0011101 29
+#define B00011101 29
+#define B11110 30
+#define B011110 30
+#define B0011110 30
+#define B00011110 30
+#define B11111 31
+#define B011111 31
+#define B0011111 31
+#define B00011111 31
+#define B100000 32
+#define B0100000 32
+#define B00100000 32
+#define B100001 33
+#define B0100001 33
+#define B00100001 33
+#define B100010 34
+#define B0100010 34
+#define B00100010 34
+#define B100011 35
+#define B0100011 35
+#define B00100011 35
+#define B100100 36
+#define B0100100 36
+#define B00100100 36
+#define B100101 37
+#define B0100101 37
+#define B00100101 37
+#define B100110 38
+#define B0100110 38
+#define B00100110 38
+#define B100111 39
+#define B0100111 39
+#define B00100111 39
+#define B101000 40
+#define B0101000 40
+#define B00101000 40
+#define B101001 41
+#define B0101001 41
+#define B00101001 41
+#define B101010 42
+#define B0101010 42
+#define B00101010 42
+#define B101011 43
+#define B0101011 43
+#define B00101011 43
+#define B101100 44
+#define B0101100 44
+#define B00101100 44
+#define B101101 45
+#define B0101101 45
+#define B00101101 45
+#define B101110 46
+#define B0101110 46
+#define B00101110 46
+#define B101111 47
+#define B0101111 47
+#define B00101111 47
+#define B110000 48
+#define B0110000 48
+#define B00110000 48
+#define B110001 49
+#define B0110001 49
+#define B00110001 49
+#define B110010 50
+#define B0110010 50
+#define B00110010 50
+#define B110011 51
+#define B0110011 51
+#define B00110011 51
+#define B110100 52
+#define B0110100 52
+#define B00110100 52
+#define B110101 53
+#define B0110101 53
+#define B00110101 53
+#define B110110 54
+#define B0110110 54
+#define B00110110 54
+#define B110111 55
+#define B0110111 55
+#define B00110111 55
+#define B111000 56
+#define B0111000 56
+#define B00111000 56
+#define B111001 57
+#define B0111001 57
+#define B00111001 57
+#define B111010 58
+#define B0111010 58
+#define B00111010 58
+#define B111011 59
+#define B0111011 59
+#define B00111011 59
+#define B111100 60
+#define B0111100 60
+#define B00111100 60
+#define B111101 61
+#define B0111101 61
+#define B00111101 61
+#define B111110 62
+#define B0111110 62
+#define B00111110 62
+#define B111111 63
+#define B0111111 63
+#define B00111111 63
+#define B1000000 64
+#define B01000000 64
+#define B1000001 65
+#define B01000001 65
+#define B1000010 66
+#define B01000010 66
+#define B1000011 67
+#define B01000011 67
+#define B1000100 68
+#define B01000100 68
+#define B1000101 69
+#define B01000101 69
+#define B1000110 70
+#define B01000110 70
+#define B1000111 71
+#define B01000111 71
+#define B1001000 72
+#define B01001000 72
+#define B1001001 73
+#define B01001001 73
+#define B1001010 74
+#define B01001010 74
+#define B1001011 75
+#define B01001011 75
+#define B1001100 76
+#define B01001100 76
+#define B1001101 77
+#define B01001101 77
+#define B1001110 78
+#define B01001110 78
+#define B1001111 79
+#define B01001111 79
+#define B1010000 80
+#define B01010000 80
+#define B1010001 81
+#define B01010001 81
+#define B1010010 82
+#define B01010010 82
+#define B1010011 83
+#define B01010011 83
+#define B1010100 84
+#define B01010100 84
+#define B1010101 85
+#define B01010101 85
+#define B1010110 86
+#define B01010110 86
+#define B1010111 87
+#define B01010111 87
+#define B1011000 88
+#define B01011000 88
+#define B1011001 89
+#define B01011001 89
+#define B1011010 90
+#define B01011010 90
+#define B1011011 91
+#define B01011011 91
+#define B1011100 92
+#define B01011100 92
+#define B1011101 93
+#define B01011101 93
+#define B1011110 94
+#define B01011110 94
+#define B1011111 95
+#define B01011111 95
+#define B1100000 96
+#define B01100000 96
+#define B1100001 97
+#define B01100001 97
+#define B1100010 98
+#define B01100010 98
+#define B1100011 99
+#define B01100011 99
+#define B1100100 100
+#define B01100100 100
+#define B1100101 101
+#define B01100101 101
+#define B1100110 102
+#define B01100110 102
+#define B1100111 103
+#define B01100111 103
+#define B1101000 104
+#define B01101000 104
+#define B1101001 105
+#define B01101001 105
+#define B1101010 106
+#define B01101010 106
+#define B1101011 107
+#define B01101011 107
+#define B1101100 108
+#define B01101100 108
+#define B1101101 109
+#define B01101101 109
+#define B1101110 110
+#define B01101110 110
+#define B1101111 111
+#define B01101111 111
+#define B1110000 112
+#define B01110000 112
+#define B1110001 113
+#define B01110001 113
+#define B1110010 114
+#define B01110010 114
+#define B1110011 115
+#define B01110011 115
+#define B1110100 116
+#define B01110100 116
+#define B1110101 117
+#define B01110101 117
+#define B1110110 118
+#define B01110110 118
+#define B1110111 119
+#define B01110111 119
+#define B1111000 120
+#define B01111000 120
+#define B1111001 121
+#define B01111001 121
+#define B1111010 122
+#define B01111010 122
+#define B1111011 123
+#define B01111011 123
+#define B1111100 124
+#define B01111100 124
+#define B1111101 125
+#define B01111101 125
+#define B1111110 126
+#define B01111110 126
+#define B1111111 127
+#define B01111111 127
+#define B10000000 128
+#define B10000001 129
+#define B10000010 130
+#define B10000011 131
+#define B10000100 132
+#define B10000101 133
+#define B10000110 134
+#define B10000111 135
+#define B10001000 136
+#define B10001001 137
+#define B10001010 138
+#define B10001011 139
+#define B10001100 140
+#define B10001101 141
+#define B10001110 142
+#define B10001111 143
+#define B10010000 144
+#define B10010001 145
+#define B10010010 146
+#define B10010011 147
+#define B10010100 148
+#define B10010101 149
+#define B10010110 150
+#define B10010111 151
+#define B10011000 152
+#define B10011001 153
+#define B10011010 154
+#define B10011011 155
+#define B10011100 156
+#define B10011101 157
+#define B10011110 158
+#define B10011111 159
+#define B10100000 160
+#define B10100001 161
+#define B10100010 162
+#define B10100011 163
+#define B10100100 164
+#define B10100101 165
+#define B10100110 166
+#define B10100111 167
+#define B10101000 168
+#define B10101001 169
+#define B10101010 170
+#define B10101011 171
+#define B10101100 172
+#define B10101101 173
+#define B10101110 174
+#define B10101111 175
+#define B10110000 176
+#define B10110001 177
+#define B10110010 178
+#define B10110011 179
+#define B10110100 180
+#define B10110101 181
+#define B10110110 182
+#define B10110111 183
+#define B10111000 184
+#define B10111001 185
+#define B10111010 186
+#define B10111011 187
+#define B10111100 188
+#define B10111101 189
+#define B10111110 190
+#define B10111111 191
+#define B11000000 192
+#define B11000001 193
+#define B11000010 194
+#define B11000011 195
+#define B11000100 196
+#define B11000101 197
+#define B11000110 198
+#define B11000111 199
+#define B11001000 200
+#define B11001001 201
+#define B11001010 202
+#define B11001011 203
+#define B11001100 204
+#define B11001101 205
+#define B11001110 206
+#define B11001111 207
+#define B11010000 208
+#define B11010001 209
+#define B11010010 210
+#define B11010011 211
+#define B11010100 212
+#define B11010101 213
+#define B11010110 214
+#define B11010111 215
+#define B11011000 216
+#define B11011001 217
+#define B11011010 218
+#define B11011011 219
+#define B11011100 220
+#define B11011101 221
+#define B11011110 222
+#define B11011111 223
+#define B11100000 224
+#define B11100001 225
+#define B11100010 226
+#define B11100011 227
+#define B11100100 228
+#define B11100101 229
+#define B11100110 230
+#define B11100111 231
+#define B11101000 232
+#define B11101001 233
+#define B11101010 234
+#define B11101011 235
+#define B11101100 236
+#define B11101101 237
+#define B11101110 238
+#define B11101111 239
+#define B11110000 240
+#define B11110001 241
+#define B11110010 242
+#define B11110011 243
+#define B11110100 244
+#define B11110101 245
+#define B11110110 246
+#define B11110111 247
+#define B11111000 248
+#define B11111001 249
+#define B11111010 250
+#define B11111011 251
+#define B11111100 252
+#define B11111101 253
+#define B11111110 254
+#define B11111111 255
+
+#endif

cpu/avr/dev/arduino/hw-arduino.h

@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2014, Ralf Schlatterbeck Open Source Consulting
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * This file is part of the Contiki operating system.
+ */
+
+/**
+ * \defgroup compatibility Arduino - Contiki
+ *
+ * This defines contiki-compatible hardware definitions for running
+ * arduino sketches (or just to call arduino-compatible function). 
+ * For now only for osd hardware, a similar file should exist for each
+ * arduino-compatible hardware.
+ *
+ * @{
+ */
+
+/**
+ * \file
+ *        Header file for arduino compatibility
+ * \author
+ *        Ralf Schlatterbeck <rsc@runtux.com>
+ *
+ */
+
+#ifdef __cplusplus
+extern "C"{
+#endif
+
+#include "contiki.h"
+
+/*
+ * The OSD hardware only supports timer 3 for PWM, timer 2 is used by
+ * contiki for sleep/wakeup timing and is not usable for PWM.
+ */
+#define digitalPinToTimer(pin)                \
+    ( (pin) == 2                              \
+    ? TIMER3A                                 \
+    : ( (pin) == 3                            \
+      ? TIMER3B                               \
+      : ((pin == 4) ? TIMER3C : NOT_ON_TIMER) \
+      )                                       \
+    )
+
+/* Only init timer 3 with phase correct pwm 8-bit and prescaler 64 */
+#define arduino_pwm_timer_init() \
+  (hwtimer_ini (3, HWT_WGM_PWM_PHASE_8_BIT, HWT_CLOCK_PRESCALER_64, 0))
+
+/*
+ * VI settings, see coding style
+ * ex:ts=8:et:sw=2
+ */
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+/** @} */

cpu/avr/dev/arduino/new.cpp

@@ -0,0 +1,36 @@
+/*
+  Copyright (c) 2014 Arduino.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  See the GNU Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#include <stdlib.h>
+
+void *operator new(size_t size) {
+  return malloc(size);
+}
+
+void *operator new[](size_t size) {
+  return malloc(size);
+}
+
+void operator delete(void * ptr) {
+  free(ptr);
+}
+
+void operator delete[](void * ptr) {
+  free(ptr);
+}
+

cpu/avr/dev/arduino/new.h

@@ -0,0 +1,30 @@
+/*
+  Copyright (c) 2014 Arduino.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  See the GNU Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#ifndef NEW_H
+#define NEW_H
+
+#include <stdlib.h>
+
+void * operator new(size_t size);
+void * operator new[](size_t size);
+void operator delete(void * ptr);
+void operator delete[](void * ptr);
+
+#endif
+

cpu/avr/dev/arduino/twi.c

@@ -0,0 +1,545 @@
+/*
+  twi.c - TWI/I2C library for Wiring & Arduino
+  Copyright (c) 2006 Nicholas Zambetti.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+  Modified 2012 by Todd Krein (todd@krein.org) to implement repeated starts
+*/
+
+#include <math.h>
+#include <stdlib.h>
+#include <inttypes.h>
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include <compat/twi.h>
+#include "Arduino.h" // for digitalWrite
+
+#ifndef cbi
+#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))
+#endif
+
+#ifndef sbi
+#define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))
+#endif
+
+#include "pins_arduino.h"
+#include "twi.h"
+
+static volatile uint8_t twi_state;
+static volatile uint8_t twi_slarw;
+static volatile uint8_t twi_sendStop;			// should the transaction end with a stop
+static volatile uint8_t twi_inRepStart;			// in the middle of a repeated start
+
+static void (*twi_onSlaveTransmit)(void);
+static void (*twi_onSlaveReceive)(uint8_t*, int);
+
+static uint8_t twi_masterBuffer[TWI_BUFFER_LENGTH];
+static volatile uint8_t twi_masterBufferIndex;
+static volatile uint8_t twi_masterBufferLength;
+
+static uint8_t twi_txBuffer[TWI_BUFFER_LENGTH];
+static volatile uint8_t twi_txBufferIndex;
+static volatile uint8_t twi_txBufferLength;
+
+static uint8_t twi_rxBuffer[TWI_BUFFER_LENGTH];
+static volatile uint8_t twi_rxBufferIndex;
+
+static volatile uint8_t twi_error;
+
+/* 
+ * Function twi_init
+ * Desc     readys twi pins and sets twi bitrate
+ * Input    none
+ * Output   none
+ */
+void twi_init(void)
+{
+  // initialize state
+  twi_state = TWI_READY;
+  twi_sendStop = true;		// default value
+  twi_inRepStart = false;
+  
+  // activate internal pullups for twi.
+  digitalWrite(SDA, 1);
+  digitalWrite(SCL, 1);
+
+  // initialize twi prescaler and bit rate
+  cbi(TWSR, TWPS0);
+  cbi(TWSR, TWPS1);
+  TWBR = ((F_CPU / TWI_FREQ) - 16) / 2;
+
+  /* twi bit rate formula from atmega128 manual pg 204
+  SCL Frequency = CPU Clock Frequency / (16 + (2 * TWBR))
+  note: TWBR should be 10 or higher for master mode
+  It is 72 for a 16mhz Wiring board with 100kHz TWI */
+
+  // enable twi module, acks, and twi interrupt
+  TWCR = _BV(TWEN) | _BV(TWIE) | _BV(TWEA);
+}
+
+/* 
+ * Function twi_disable
+ * Desc     disables twi pins
+ * Input    none
+ * Output   none
+ */
+void twi_disable(void)
+{
+  // disable twi module, acks, and twi interrupt
+  TWCR &= ~(_BV(TWEN) | _BV(TWIE) | _BV(TWEA));
+
+  // deactivate internal pullups for twi.
+  digitalWrite(SDA, 0);
+  digitalWrite(SCL, 0);
+}
+
+/* 
+ * Function twi_slaveInit
+ * Desc     sets slave address and enables interrupt
+ * Input    none
+ * Output   none
+ */
+void twi_setAddress(uint8_t address)
+{
+  // set twi slave address (skip over TWGCE bit)
+  TWAR = address << 1;
+}
+
+/* 
+ * Function twi_readFrom
+ * Desc     attempts to become twi bus master and read a
+ *          series of bytes from a device on the bus
+ * Input    address: 7bit i2c device address
+ *          data: pointer to byte array
+ *          length: number of bytes to read into array
+ *          sendStop: Boolean indicating whether to send a stop at the end
+ * Output   number of bytes read
+ */
+uint8_t twi_readFrom(uint8_t address, uint8_t* data, uint8_t length, uint8_t sendStop)
+{
+  uint8_t i;
+
+  // ensure data will fit into buffer
+  if(TWI_BUFFER_LENGTH < length){
+    return 0;
+  }
+
+  // wait until twi is ready, become master receiver
+  while(TWI_READY != twi_state){
+    continue;
+  }
+  twi_state = TWI_MRX;
+  twi_sendStop = sendStop;
+  // reset error state (0xFF.. no error occured)
+  twi_error = 0xFF;
+
+  // initialize buffer iteration vars
+  twi_masterBufferIndex = 0;
+  twi_masterBufferLength = length-1;  // This is not intuitive, read on...
+  // On receive, the previously configured ACK/NACK setting is transmitted in
+  // response to the received byte before the interrupt is signalled. 
+  // Therefor we must actually set NACK when the _next_ to last byte is
+  // received, causing that NACK to be sent in response to receiving the last
+  // expected byte of data.
+
+  // build sla+w, slave device address + w bit
+  twi_slarw = TW_READ;
+  twi_slarw |= address << 1;
+
+  if (true == twi_inRepStart) {
+    // if we're in the repeated start state, then we've already sent the start,
+    // (@@@ we hope), and the TWI statemachine is just waiting for the address byte.
+    // We need to remove ourselves from the repeated start state before we enable interrupts,
+    // since the ISR is ASYNC, and we could get confused if we hit the ISR before cleaning
+    // up. Also, don't enable the START interrupt. There may be one pending from the 
+    // repeated start that we sent outselves, and that would really confuse things.
+    twi_inRepStart = false;			// remember, we're dealing with an ASYNC ISR
+    do {
+      TWDR = twi_slarw;
+    } while(TWCR & _BV(TWWC));
+    TWCR = _BV(TWINT) | _BV(TWEA) | _BV(TWEN) | _BV(TWIE);	// enable INTs, but not START
+  }
+  else
+    // send start condition
+    TWCR = _BV(TWEN) | _BV(TWIE) | _BV(TWEA) | _BV(TWINT) | _BV(TWSTA);
+
+  // wait for read operation to complete
+  while(TWI_MRX == twi_state){
+    continue;
+  }
+
+  if (twi_masterBufferIndex < length)
+    length = twi_masterBufferIndex;
+
+  // copy twi buffer to data
+  for(i = 0; i < length; ++i){
+    data[i] = twi_masterBuffer[i];
+  }
+	
+  return length;
+}
+
+/* 
+ * Function twi_writeTo
+ * Desc     attempts to become twi bus master and write a
+ *          series of bytes to a device on the bus
+ * Input    address: 7bit i2c device address
+ *          data: pointer to byte array
+ *          length: number of bytes in array
+ *          wait: boolean indicating to wait for write or not
+ *          sendStop: boolean indicating whether or not to send a stop at the end
+ * Output   0 .. success
+ *          1 .. length to long for buffer
+ *          2 .. address send, NACK received
+ *          3 .. data send, NACK received
+ *          4 .. other twi error (lost bus arbitration, bus error, ..)
+ */
+uint8_t twi_writeTo(uint8_t address, uint8_t* data, uint8_t length, uint8_t wait, uint8_t sendStop)
+{
+  uint8_t i;
+
+  // ensure data will fit into buffer
+  if(TWI_BUFFER_LENGTH < length){
+    return 1;
+  }
+
+  // wait until twi is ready, become master transmitter
+  while(TWI_READY != twi_state){
+    continue;
+  }
+  twi_state = TWI_MTX;
+  twi_sendStop = sendStop;
+  // reset error state (0xFF.. no error occured)
+  twi_error = 0xFF;
+
+  // initialize buffer iteration vars
+  twi_masterBufferIndex = 0;
+  twi_masterBufferLength = length;
+  
+  // copy data to twi buffer
+  for(i = 0; i < length; ++i){
+    twi_masterBuffer[i] = data[i];
+  }
+  
+  // build sla+w, slave device address + w bit
+  twi_slarw = TW_WRITE;
+  twi_slarw |= address << 1;
+  
+  // if we're in a repeated start, then we've already sent the START
+  // in the ISR. Don't do it again.
+  //
+  if (true == twi_inRepStart) {
+    // if we're in the repeated start state, then we've already sent the start,
+    // (@@@ we hope), and the TWI statemachine is just waiting for the address byte.
+    // We need to remove ourselves from the repeated start state before we enable interrupts,
+    // since the ISR is ASYNC, and we could get confused if we hit the ISR before cleaning
+    // up. Also, don't enable the START interrupt. There may be one pending from the 
+    // repeated start that we sent outselves, and that would really confuse things.
+    twi_inRepStart = false;			// remember, we're dealing with an ASYNC ISR
+    do {
+      TWDR = twi_slarw;				
+    } while(TWCR & _BV(TWWC));
+    TWCR = _BV(TWINT) | _BV(TWEA) | _BV(TWEN) | _BV(TWIE);	// enable INTs, but not START
+  }
+  else
+    // send start condition
+    TWCR = _BV(TWINT) | _BV(TWEA) | _BV(TWEN) | _BV(TWIE) | _BV(TWSTA);	// enable INTs
+
+  // wait for write operation to complete
+  while(wait && (TWI_MTX == twi_state)){
+    continue;
+  }
+  
+  if (twi_error == 0xFF)
+    return 0;	// success
+  else if (twi_error == TW_MT_SLA_NACK)
+    return 2;	// error: address send, nack received
+  else if (twi_error == TW_MT_DATA_NACK)
+    return 3;	// error: data send, nack received
+  else
+    return 4;	// other twi error
+}
+
+/* 
+ * Function twi_transmit
+ * Desc     fills slave tx buffer with data
+ *          must be called in slave tx event callback
+ * Input    data: pointer to byte array
+ *          length: number of bytes in array
+ * Output   1 length too long for buffer
+ *          2 not slave transmitter
+ *          0 ok
+ */
+uint8_t twi_transmit(const uint8_t* data, uint8_t length)
+{
+  uint8_t i;
+
+  // ensure data will fit into buffer
+  if(TWI_BUFFER_LENGTH < length){
+    return 1;
+  }
+  
+  // ensure we are currently a slave transmitter
+  if(TWI_STX != twi_state){
+    return 2;
+  }
+  
+  // set length and copy data into tx buffer
+  twi_txBufferLength = length;
+  for(i = 0; i < length; ++i){
+    twi_txBuffer[i] = data[i];
+  }
+  
+  return 0;
+}
+
+/* 
+ * Function twi_attachSlaveRxEvent
+ * Desc     sets function called before a slave read operation
+ * Input    function: callback function to use
+ * Output   none
+ */
+void twi_attachSlaveRxEvent( void (*function)(uint8_t*, int) )
+{
+  twi_onSlaveReceive = function;
+}
+
+/* 
+ * Function twi_attachSlaveTxEvent
+ * Desc     sets function called before a slave write operation
+ * Input    function: callback function to use
+ * Output   none
+ */
+void twi_attachSlaveTxEvent( void (*function)(void) )
+{
+  twi_onSlaveTransmit = function;
+}
+
+/* 
+ * Function twi_reply
+ * Desc     sends byte or readys receive line
+ * Input    ack: byte indicating to ack or to nack
+ * Output   none
+ */
+void twi_reply(uint8_t ack)
+{
+  // transmit master read ready signal, with or without ack
+  if(ack){
+    TWCR = _BV(TWEN) | _BV(TWIE) | _BV(TWINT) | _BV(TWEA);
+  }else{
+	  TWCR = _BV(TWEN) | _BV(TWIE) | _BV(TWINT);
+  }
+}
+
+/* 
+ * Function twi_stop
+ * Desc     relinquishes bus master status
+ * Input    none
+ * Output   none
+ */
+void twi_stop(void)
+{
+  // send stop condition
+  TWCR = _BV(TWEN) | _BV(TWIE) | _BV(TWEA) | _BV(TWINT) | _BV(TWSTO);
+
+  // wait for stop condition to be exectued on bus
+  // TWINT is not set after a stop condition!
+  while(TWCR & _BV(TWSTO)){
+    continue;
+  }
+
+  // update twi state
+  twi_state = TWI_READY;
+}
+
+/* 
+ * Function twi_releaseBus
+ * Desc     releases bus control
+ * Input    none
+ * Output   none
+ */
+void twi_releaseBus(void)
+{
+  // release bus
+  TWCR = _BV(TWEN) | _BV(TWIE) | _BV(TWEA) | _BV(TWINT);
+
+  // update twi state
+  twi_state = TWI_READY;
+}
+
+ISR(TWI_vect)
+{
+  switch(TW_STATUS){
+    // All Master
+    case TW_START:     // sent start condition
+    case TW_REP_START: // sent repeated start condition
+      // copy device address and r/w bit to output register and ack
+      TWDR = twi_slarw;
+      twi_reply(1);
+      break;
+
+    // Master Transmitter
+    case TW_MT_SLA_ACK:  // slave receiver acked address
+    case TW_MT_DATA_ACK: // slave receiver acked data
+      // if there is data to send, send it, otherwise stop 
+      if(twi_masterBufferIndex < twi_masterBufferLength){
+        // copy data to output register and ack
+        TWDR = twi_masterBuffer[twi_masterBufferIndex++];
+        twi_reply(1);
+      }else{
+	if (twi_sendStop)
+          twi_stop();
+	else {
+	  twi_inRepStart = true;	// we're gonna send the START
+	  // don't enable the interrupt. We'll generate the start, but we 
+	  // avoid handling the interrupt until we're in the next transaction,
+	  // at the point where we would normally issue the start.
+	  TWCR = _BV(TWINT) | _BV(TWSTA)| _BV(TWEN) ;
+	  twi_state = TWI_READY;
+	}
+      }
+      break;
+    case TW_MT_SLA_NACK:  // address sent, nack received
+      twi_error = TW_MT_SLA_NACK;
+      twi_stop();
+      break;
+    case TW_MT_DATA_NACK: // data sent, nack received
+      twi_error = TW_MT_DATA_NACK;
+      twi_stop();
+      break;
+    case TW_MT_ARB_LOST: // lost bus arbitration
+      twi_error = TW_MT_ARB_LOST;
+      twi_releaseBus();
+      break;
+
+    // Master Receiver
+    case TW_MR_DATA_ACK: // data received, ack sent
+      // put byte into buffer
+      twi_masterBuffer[twi_masterBufferIndex++] = TWDR;
+    case TW_MR_SLA_ACK:  // address sent, ack received
+      // ack if more bytes are expected, otherwise nack
+      if(twi_masterBufferIndex < twi_masterBufferLength){
+        twi_reply(1);
+      }else{
+        twi_reply(0);
+      }
+      break;
+    case TW_MR_DATA_NACK: // data received, nack sent
+      // put final byte into buffer
+      twi_masterBuffer[twi_masterBufferIndex++] = TWDR;
+	if (twi_sendStop)
+          twi_stop();
+	else {
+	  twi_inRepStart = true;	// we're gonna send the START
+	  // don't enable the interrupt. We'll generate the start, but we 
+	  // avoid handling the interrupt until we're in the next transaction,
+	  // at the point where we would normally issue the start.
+	  TWCR = _BV(TWINT) | _BV(TWSTA)| _BV(TWEN) ;
+	  twi_state = TWI_READY;
+	}    
+	break;
+    case TW_MR_SLA_NACK: // address sent, nack received
+      twi_stop();
+      break;
+    // TW_MR_ARB_LOST handled by TW_MT_ARB_LOST case
+
+    // Slave Receiver
+    case TW_SR_SLA_ACK:   // addressed, returned ack
+    case TW_SR_GCALL_ACK: // addressed generally, returned ack
+    case TW_SR_ARB_LOST_SLA_ACK:   // lost arbitration, returned ack
+    case TW_SR_ARB_LOST_GCALL_ACK: // lost arbitration, returned ack
+      // enter slave receiver mode
+      twi_state = TWI_SRX;
+      // indicate that rx buffer can be overwritten and ack
+      twi_rxBufferIndex = 0;
+      twi_reply(1);
+      break;
+    case TW_SR_DATA_ACK:       // data received, returned ack
+    case TW_SR_GCALL_DATA_ACK: // data received generally, returned ack
+      // if there is still room in the rx buffer
+      if(twi_rxBufferIndex < TWI_BUFFER_LENGTH){
+        // put byte in buffer and ack
+        twi_rxBuffer[twi_rxBufferIndex++] = TWDR;
+        twi_reply(1);
+      }else{
+        // otherwise nack
+        twi_reply(0);
+      }
+      break;
+    case TW_SR_STOP: // stop or repeated start condition received
+      // ack future responses and leave slave receiver state
+      twi_releaseBus();
+      // put a null char after data if there's room
+      if(twi_rxBufferIndex < TWI_BUFFER_LENGTH){
+        twi_rxBuffer[twi_rxBufferIndex] = '\0';
+      }
+      // callback to user defined callback
+      twi_onSlaveReceive(twi_rxBuffer, twi_rxBufferIndex);
+      // since we submit rx buffer to "wire" library, we can reset it
+      twi_rxBufferIndex = 0;
+      break;
+    case TW_SR_DATA_NACK:       // data received, returned nack
+    case TW_SR_GCALL_DATA_NACK: // data received generally, returned nack
+      // nack back at master
+      twi_reply(0);
+      break;
+    
+    // Slave Transmitter
+    case TW_ST_SLA_ACK:          // addressed, returned ack
+    case TW_ST_ARB_LOST_SLA_ACK: // arbitration lost, returned ack
+      // enter slave transmitter mode
+      twi_state = TWI_STX;
+      // ready the tx buffer index for iteration
+      twi_txBufferIndex = 0;
+      // set tx buffer length to be zero, to verify if user changes it
+      twi_txBufferLength = 0;
+      // request for txBuffer to be filled and length to be set
+      // note: user must call twi_transmit(bytes, length) to do this
+      twi_onSlaveTransmit();
+      // if they didn't change buffer & length, initialize it
+      if(0 == twi_txBufferLength){
+        twi_txBufferLength = 1;
+        twi_txBuffer[0] = 0x00;
+      }
+      // transmit first byte from buffer, fall
+    case TW_ST_DATA_ACK: // byte sent, ack returned
+      // copy data to output register
+      TWDR = twi_txBuffer[twi_txBufferIndex++];
+      // if there is more to send, ack, otherwise nack
+      if(twi_txBufferIndex < twi_txBufferLength){
+        twi_reply(1);
+      }else{
+        twi_reply(0);
+      }
+      break;
+    case TW_ST_DATA_NACK: // received nack, we are done 
+    case TW_ST_LAST_DATA: // received ack, but we are done already!
+      // ack future responses
+      twi_reply(1);
+      // leave slave receiver state
+      twi_state = TWI_READY;
+      break;
+
+    // All
+    case TW_NO_INFO:   // no state information
+      break;
+    case TW_BUS_ERROR: // bus error, illegal stop/start
+      twi_error = TW_BUS_ERROR;
+      twi_stop();
+      break;
+  }
+}
+

cpu/avr/dev/arduino/twi.h

@@ -0,0 +1,54 @@
+/*
+  twi.h - TWI/I2C library for Wiring & Arduino
+  Copyright (c) 2006 Nicholas Zambetti.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#ifndef twi_h
+#define twi_h
+
+  #include <inttypes.h>
+
+  //#define ATMEGA8
+
+  #ifndef TWI_FREQ
+  #define TWI_FREQ 100000L
+  #endif
+
+  #ifndef TWI_BUFFER_LENGTH
+  #define TWI_BUFFER_LENGTH 32
+  #endif
+
+  #define TWI_READY 0
+  #define TWI_MRX   1
+  #define TWI_MTX   2
+  #define TWI_SRX   3
+  #define TWI_STX   4
+  
+  void twi_init(void);
+  void twi_disable(void);
+  void twi_setAddress(uint8_t);
+  uint8_t twi_readFrom(uint8_t, uint8_t*, uint8_t, uint8_t);
+  uint8_t twi_writeTo(uint8_t, uint8_t*, uint8_t, uint8_t, uint8_t);
+  uint8_t twi_transmit(const uint8_t*, uint8_t);
+  void twi_attachSlaveRxEvent( void (*)(uint8_t*, int) );
+  void twi_attachSlaveTxEvent( void (*)(void) );
+  void twi_reply(uint8_t);
+  void twi_stop(void);
+  void twi_releaseBus(void);
+
+#endif
+

cpu/avr/dev/arduino/wiring_digital.c

@@ -0,0 +1,104 @@
+/*
+  wiring_digital.c - digital input and output functions
+  Part of Arduino - http://www.arduino.cc/
+
+  Copyright (c) 2005-2006 David A. Mellis
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General
+  Public License along with this library; if not, write to the
+  Free Software Foundation, Inc., 59 Temple Place, Suite 330,
+  Boston, MA  02111-1307  USA
+
+  Modified 28 September 2010 by Mark Sproul
+
+  $Id: wiring.c 248 2007-02-03 15:36:30Z mellis $
+*/
+
+#define ARDUINO_MAIN
+#include "wiring_private.h"
+#include "pins_arduino.h"
+
+void pinMode(uint8_t pin, uint8_t mode)
+{
+	uint8_t bit = digitalPinToBitMask(pin);
+	uint8_t port = digitalPinToPort(pin);
+	volatile uint8_t *reg, *out;
+
+	if (port == NOT_A_PIN) return;
+
+	// JWS: can I let the optimizer do this?
+	reg = portModeRegister(port);
+	out = portOutputRegister(port);
+
+	if (mode == INPUT) { 
+		uint8_t oldSREG = SREG;
+                cli();
+		*reg &= ~bit;
+		*out &= ~bit;
+		SREG = oldSREG;
+	} else if (mode == INPUT_PULLUP) {
+		uint8_t oldSREG = SREG;
+                cli();
+		*reg &= ~bit;
+		*out |= bit;
+		SREG = oldSREG;
+	} else {
+		uint8_t oldSREG = SREG;
+                cli();
+		*reg |= bit;
+		SREG = oldSREG;
+	}
+}
+
+void digitalWrite(uint8_t pin, uint8_t val)
+{
+	uint8_t timer = digitalPinToTimer(pin);
+	uint8_t bit = digitalPinToBitMask(pin);
+	uint8_t port = digitalPinToPort(pin);
+	volatile uint8_t *out;
+
+	if (port == NOT_A_PIN) return;
+
+	// If the pin that support PWM output, we need to turn it off
+	// before doing a digital write.
+	if (timer != NOT_ON_TIMER) turnOffPWM(timer);
+
+	out = portOutputRegister(port);
+
+	uint8_t oldSREG = SREG;
+	cli();
+
+	if (val == LOW) {
+		*out &= ~bit;
+	} else {
+		*out |= bit;
+	}
+
+	SREG = oldSREG;
+}
+
+int digitalRead(uint8_t pin)
+{
+	uint8_t timer = digitalPinToTimer(pin);
+	uint8_t bit = digitalPinToBitMask(pin);
+	uint8_t port = digitalPinToPort(pin);
+
+	if (port == NOT_A_PIN) return LOW;
+
+	// If the pin that support PWM output, we need to turn it off
+	// before getting a digital reading.
+	if (timer != NOT_ON_TIMER) turnOffPWM(timer);
+
+	if (*portInputRegister(port) & bit) return HIGH;
+	return LOW;
+}

cpu/avr/dev/arduino/wiring_private.h

@@ -0,0 +1,69 @@
+/*
+  wiring_private.h - Internal header file.
+  Part of Arduino - http://www.arduino.cc/
+
+  Copyright (c) 2005-2006 David A. Mellis
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General
+  Public License along with this library; if not, write to the
+  Free Software Foundation, Inc., 59 Temple Place, Suite 330,
+  Boston, MA  02111-1307  USA
+
+  $Id: wiring.h 239 2007-01-12 17:58:39Z mellis $
+*/
+
+#ifndef WiringPrivate_h
+#define WiringPrivate_h
+
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include <stdio.h>
+#include <stdarg.h>
+
+#include "Arduino.h"
+
+#ifdef __cplusplus
+extern "C"{
+#endif
+
+#ifndef cbi
+#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))
+#endif
+#ifndef sbi
+#define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))
+#endif
+
+#define EXTERNAL_INT_0 0
+#define EXTERNAL_INT_1 1
+#define EXTERNAL_INT_2 2
+#define EXTERNAL_INT_3 3
+#define EXTERNAL_INT_4 4
+#define EXTERNAL_INT_5 5
+#define EXTERNAL_INT_6 6
+#define EXTERNAL_INT_7 7
+
+#if defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
+#define EXTERNAL_NUM_INTERRUPTS 8
+#elif defined(__AVR_ATmega128RFA1__)
+#define EXTERNAL_NUM_INTERRUPTS 8
+#else
+#define EXTERNAL_NUM_INTERRUPTS 2
+#endif
+
+typedef void (*voidFuncPtr)(void);
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif

cpu/avr/dev/batmon.c

@@ -0,0 +1,55 @@
+#include "contiki.h"
+#include "batmon.h"
+#include <util/delay.h>
+
+
+
+
+int8_t batmon_init()
+{
+	return 0;
+}	
+
+int8_t batmon_get_voltage(uint16_t* voltage)
+{
+	uint16_t volt = 0;
+	uint16_t resolution = 75;
+	uint16_t offset = 2550;
+	int8_t ctr = 0;
+	
+	BATMON = 0 | _BV(BATMON_HR);
+	_delay_us(2);
+	
+	if(BATMON & _BV(BATMON_OK))
+	{
+		// voltage above 2.550 V
+		resolution = 75;
+		offset = 2550;
+		for(ctr=15; ctr>=0; ctr--)
+		{
+			BATMON = (BATMON & 0xF0) | (ctr);
+			_delay_us(2);
+			if(BATMON & _BV(BATMON_OK)) break;
+		}
+	}
+	else
+	{
+		// voltage below 2.550 V
+		resolution = 50;
+		offset = 1700;
+		
+		BATMON &= ~_BV(BATMON_HR);
+		
+		for(ctr=15; ctr>=0; ctr--)
+		{
+			BATMON = (BATMON & 0xF0) | (ctr);
+			_delay_us(2);
+			if(BATMON & _BV(BATMON_OK)) break;
+		}
+	}
+	
+	volt = resolution*ctr+offset;
+	*voltage=volt; 
+	
+	return 0;
+}

cpu/avr/dev/batmon.h

@@ -0,0 +1,8 @@
+#ifndef BATMON_H_
+#define BATMON_H_
+
+int8_t batmon_init();
+int8_t batmon_get_voltage(uint16_t* voltage);
+
+
+#endif /* BATMON_H_ */

cpu/avr/dev/battery-sensor.c

@@ -0,0 +1,90 @@
+/*
+* Copyright (c) 2012, BinaryLabs.
+* All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions
+* are met:
+* 1. Redistributions of source code must retain the above copyright
+* notice, this list of conditions and the following disclaimer.
+* 2. Redistributions in binary form must reproduce the above copyright
+* notice, this list of conditions and the following disclaimer in the
+* documentation and/or other materials provided with the distribution.
+* 3. Neither the name of the Institute nor the names of its contributors
+* may be used to endorse or promote products derived from this software
+* without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+* SUCH DAMAGE.
+*
+* @(#)$Id: battery-sensor.h,v 1.1 2012/08/25 19:34:06 nifi Exp $
+*/
+
+/**
+* \file
+* Battery sensor file for Atmega128rfa1.
+* \author
+* Paulo Louro <paulolouro@binarylabs.dk>
+* Harald Pichler <harald@the-develop.net>
+*/
+
+/**
+*The atmel rf23x radios have a low voltage detector that can be configured in units of 75 millivolts. Here is example *code for the ATmega128rfa1, where the BATMON register is in extended io space [dak664]
+*/
+
+#include "dev/battery-sensor.h"
+#include "dev/batmon.h"
+
+const struct sensors_sensor battery_sensor;
+/*---------------------------------------------------------------------------*/
+
+/**
+* \return Voltage on battery measurement with BATMON register.
+*/
+static int
+value(int type)
+{
+
+  uint16_t h;
+/*
+  uint8_t p1;
+  BATMON = 16; //give BATMON time to stabilize at highest range and lowest voltage
+
+// Bandgap can't be measured against supply voltage in this chip.
+// Use BATMON register instead
+  for ( p1=16; p1<31; p1++) {
+    BATMON = p1;
+    clock_delay_usec(100); // delay needed !!
+    if ((BATMON&(1<<BATMON_OK))==0) break;
+  }
+  h=2550-75*16-75+75*p1; //-75 to take the floor of the 75 mv transition window
+*/
+  batmon_get_voltage(&h);
+  return h;
+}
+/*---------------------------------------------------------------------------*/
+static int
+configure(int type, int c)
+{
+  // No configuration needed. readADC() handles all the config needed.
+  batmon_init();
+  return type == SENSORS_ACTIVE;
+}
+/*---------------------------------------------------------------------------*/
+static int
+status(int type)
+{
+  // analog sensors are always ready
+  return 1;
+}
+/*---------------------------------------------------------------------------*/
+SENSORS_SENSOR(battery_sensor, BATTERY_SENSOR, value, configure, status);

cpu/avr/dev/battery-sensor.h

@@ -0,0 +1,48 @@
+/*
+* Copyright (c) 2012, BinaryLabs.
+* All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions
+* are met:
+* 1. Redistributions of source code must retain the above copyright
+* notice, this list of conditions and the following disclaimer.
+* 2. Redistributions in binary form must reproduce the above copyright
+* notice, this list of conditions and the following disclaimer in the
+* documentation and/or other materials provided with the distribution.
+* 3. Neither the name of the Institute nor the names of its contributors
+* may be used to endorse or promote products derived from this software
+* without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+* SUCH DAMAGE.
+*
+* @(#)$Id: battery-sensor.h,v 1.1 2012/08/25 19:34:06 nifi Exp $
+*/
+
+/**
+* \file
+* Battery sensor header file for Atmega128rfa1.
+* \author
+* Paulo Louro <paulolouro@binarylabs.dk>
+*/
+
+#ifndef __BATTERY_SENSOR_H__
+#define __BATTERY_SENSOR_H__
+
+#include "lib/sensors.h"
+
+extern const struct sensors_sensor battery_sensor;
+
+#define BATTERY_SENSOR "Battery"
+
+#endif /* __BATTERY_SENSOR_H__ */

cpu/avr/dev/button-sensor.c

@@ -0,0 +1,88 @@
+/* Sensor routine */
+
+#include "lib/sensors.h"
+#include "dev/button-sensor.h"
+
+#include <avr/interrupt.h>
+#include "led.h" // debug
+
+const struct sensors_sensor button_sensor;
+
+static struct timer debouncetimer;
+static int status(int type);
+static int enabled = 0;
+volatile static int bstate;
+volatile static int bstatei;
+struct sensors_sensor *sensors[1];
+unsigned char sensors_flags[1];
+
+#define BUTTON_BIT INTF4
+#define BUTTON_CHECK_IRQ() (EIFR & BUTTON_BIT) ? 0 : 1
+
+#define PRINTF(...) printf(__VA_ARGS__)
+/*---------------------------------------------------------------------------*/
+ISR(INT4_vect)
+{
+  if(BUTTON_CHECK_IRQ()) {
+    bstatei = (PINE & _BV(PE4) ? 0 : 1);
+    if(timer_expired(&debouncetimer)) {
+//  led1_on();
+      timer_set(&debouncetimer, CLOCK_SECOND / 16);
+      bstate = (PINE & _BV(PE4) ? 0 : 1);
+      if(bstate == bstatei){
+        sensors_changed(&button_sensor);
+      }
+ //   led1_off();
+    }
+  }
+}
+/*---------------------------------------------------------------------------*/
+
+static int
+value(int type)
+{
+ //return (PINE & _BV(PE4) ? 0 : 1) || !timer_expired(&debouncetimer);
+
+ return bstate;
+}
+
+static int
+configure(int type, int c)
+{
+	switch (type) {
+	case SENSORS_ACTIVE:
+		if (c) {
+			if(!status(SENSORS_ACTIVE)) {
+  //  led1_on();
+				timer_set(&debouncetimer, 0);
+				DDRE |= (0<<DDE4); // Set pin as input
+				PORTE |= (1<<PORTE4); // Set port PORTE bint 5 with pullup resistor
+				EICRB |= (1<<ISC40); // For falling edge
+				EIMSK |= (1<<INT4); // Set int
+				enabled = 1;
+				sei();
+  //  led1_off();
+			}
+		} else {
+				enabled = 0;
+				EIMSK &= ~(1<<INT4); // clear int
+		}
+		return 1;
+	}
+	return 0;
+}
+
+static int
+status(int type)
+{
+	switch (type) {
+	case SENSORS_ACTIVE:
+	case SENSORS_READY:
+		return enabled;//(EIMSK & (1<<INT5) ? 0 : 1);//BUTTON_IRQ_ENABLED();
+	}
+	return 0;
+}
+
+SENSORS_SENSOR(button_sensor, BUTTON_SENSOR,
+	       value, configure, status);
+

cpu/avr/dev/clock.c

@@ -371,13 +371,13 @@ volatile static uint8_t osccalhigh,osccallow;
   if (seconds < 60) { //give a minute to stabilize
     if(++lockcount >= 8192UL*128/RTIMER_ARCH_SECOND) {
       lockcount=0;
-      rtimer_phase = TCNT3 & 0x0fff;
+      rtimer_phase = PLAT_TCNT & 0x0fff;
       if (seconds < 2) OSCCAL=100;
       if (last_phase > rtimer_phase) osccalhigh=++OSCCAL; else osccallow=--OSCCAL;
       last_phase = rtimer_phase;
     }
   } else {
-    uint8_t error = (TCNT3 - last_phase) & 0x3f;
+    uint8_t error = (PLAT_TCNT - last_phase) & 0x3f;
     if (error == 0) {
     } else if (error<32) {
       OSCCAL=osccallow-1;

cpu/avr/dev/dht11.c

@@ -0,0 +1,125 @@
+/*
+ DHT-11 Library
+ (c) Created by Charalampos Andrianakis on 18/12/11.
+ 
+ Permission is hereby granted, free of charge, to any person obtaining a copy
+ of this software and associated documentation files (the "Software"), to deal
+ in the Software without restriction, including without limitation the rights
+ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ copies of the Software, and to permit persons to whom the Software is
+ furnished to do so, subject to the following conditions:
+ 
+ The above copyright notice and this permission notice shall be included in
+ all copies or substantial portions of the Software.
+ 
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ THE SOFTWARE.
+ */
+
+#include <avr/io.h>
+#include "contiki.h"
+#include "dht11.h"
+#include "led.h" // debug
+
+#define udelay(u) clock_delay_usec(u)
+#define mdelay(u) clock_delay_msec(u)
+
+// todo: set DHT22 or DHT11 in project file
+// define for DHT11 else for DHT22, RHT03 
+//   #define DHT11	1
+
+uint8_t DHT_Read_Data(uint16_t *temperature, uint16_t *humidity){
+
+    //data[5] is 8byte table where data come from DHT are stored
+    //laststate holds laststate value
+    //counter is used to count microSeconds
+    uint8_t data[5], laststate = 0, counter = 0, j = 0, i = 0;
+    
+    //Clear array
+    data[0] = data[1] = data[2] = data[3] = data[4] = 0;
+
+    uint8_t volatile sreg;
+    sreg = SREG;    /* Save status register before disabling interrupts. */
+    cli();          /* Disable interrupts. */
+
+    //Set pin Output
+    //Pin High
+    DHT_DRIVE();
+    mdelay(100);                     //Wait for 100mS
+    
+    //Send Request Signal
+    //Pin Low
+    OUTP_0();                      //20ms Low 
+    mdelay(20);
+    //Pin High
+    OUTP_1();
+    udelay(40);                      //40us High
+    
+    //Set pin Input to read Bus
+    //Set pin Input
+    DHT_RELEASE();
+    laststate=DHT_INP();             //Read Pin value
+    
+    //Repeat for each Transistions
+    for (i=0; i<MAXTIMINGS; i++) {
+        //While state is the same count microseconds
+   //led1_on();
+   //led1_off();
+ 
+       while (laststate==DHT_INP()) {
+            udelay(1);
+            counter++;
+            if (counter>254) break;
+        }
+
+        if (counter>254) break;
+        
+        //laststate==_BV(DHT_PIN) checks if laststate was High
+        //ignore the first 2 transitions which are the DHT Response
+        //if (laststate==_BV(DHT_PIN) && (i > 2)) {
+        if ((i&0x01) && (i > 2)) {
+            //Save bits in segments of bytes
+            //Shift data[] value 1 position left
+            //Example. 01010100 if we shift it left one time it will be
+            //10101000
+ 
+            data[j/8]<<=1;
+            if (counter >= 15) {    //If it was high for more than 40uS
+   //led1_on();
+                data[j/8]|=1;       //it means it is bit '1' so make a logic
+   //led1_off();
+            }                       //OR with the value (save it)
+            j++;                    //making an OR by 1 to this value 10101000
+        }                           //we will have the resault 10101001
+                                    //1 in 8-bit binary is 00000001
+        //j/8 changes table record every 8 bits which means a byte has been saved
+        //so change to next record. 0/8=0 1/8=0 ... 7/8=0 8/8=1 ... 15/8=1 16/8=2
+        laststate=DHT_INP();     //save current state
+        counter=0;                  //reset counter
+        
+    }
+    SREG = sreg;    /* Enable interrupts. */
+    //printf("HUM %d %d %d %d %d %d",data[0],data[1],data[2],data[3],data[4],(uint8_t)(data[0] + data[1] + data[2] + data[3]) );
+    //Check if data received are correct by checking the CheckSum
+    if ((uint8_t)(data[0] + data[1] + data[2] + data[3]) == data[4]) {
+#ifdef DHT11
+        *humidity = data[0]*100;
+        *temperature = data[2]*100;
+#else
+        *humidity = ((uint16_t)data[0]<<8 | data[1])*10;
+        *temperature = ((uint16_t)data[2]<<8 | data[3])*10;
+#endif
+        return 0;
+    }else{
+        *humidity = 2;
+        *temperature = 2;
+//        uart_puts("\r\nCheck Sum Error");
+    }
+ 
+     return 0xff;  // Check Sum Error
+}

cpu/avr/dev/dht11.h

@@ -0,0 +1,67 @@
+/*
+ DHT-11 Library
+ (c) Created by Charalampos Andrianakis on 18/12/11.
+ 
+ Permission is hereby granted, free of charge, to any person obtaining a copy
+ of this software and associated documentation files (the "Software"), to deal
+ in the Software without restriction, including without limitation the rights
+ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ copies of the Software, and to permit persons to whom the Software is
+ furnished to do so, subject to the following conditions:
+ 
+ The above copyright notice and this permission notice shall be included in
+ all copies or substantial portions of the Software.
+ 
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ THE SOFTWARE.
+ */
+
+#include <stdlib.h>
+#include <avr/io.h>
+#include <util/delay.h>
+
+/* DHT 1-wire is at PortE.6 */
+#define DHT_PIN_READ PINE
+#define DHT_PIN_MASK _BV(PE6)
+#define DHT_PxOUT PORTE
+#define DHT_PxDIR DDRE
+
+#define SET_PIN_INPUT() (DHT_PxDIR &= ~DHT_PIN_MASK)
+#define SET_PIN_OUTPUT() (DHT_PxDIR |= DHT_PIN_MASK)
+
+#define OUTP_0() (DHT_PxOUT &= ~DHT_PIN_MASK)
+#define OUTP_1() (DHT_PxOUT |= DHT_PIN_MASK) 
+
+#define PIN_INIT() do{  \
+                     SET_PIN_INPUT();    \
+                     OUTP_0();           \
+                   } while(0)
+
+
+/* Drive the one wire interface hight */
+#define DHT_DRIVE() do {                    \
+                     SET_PIN_OUTPUT();     \
+                     OUTP_1();             \
+                   } while (0)
+
+/* Release the one wire by turning on the internal pull-up. */
+#define DHT_RELEASE() do {                  \
+                       SET_PIN_INPUT();    \
+                       OUTP_1();           \
+                     } while (0)
+
+/* Read one bit. */
+#define DHT_INP()  (DHT_PIN_READ & DHT_PIN_MASK)
+
+//The packet size is 40bit but each bit consists of low and high state
+//so 40 x 2 = 80 transitions. Also we have 2 transistions DHT response
+//and 2 transitions which indicates End Of Frame. In total 84
+#define MAXTIMINGS  84
+
+//This is the main function which requests and reads the packet
+uint8_t DHT_Read_Data(uint16_t *temperature, uint16_t *humidity);

cpu/avr/dev/ds1820.c

@@ -0,0 +1,291 @@
+/*
+ * Copyright (c) 2005, Swedish Institute of Computer Science
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * This file is part of the Contiki operating system.
+ *
+ * @(#)$Id: ds1820.c,v 1.5 2010/08/25 18:35:52 nifi Exp $
+ */
+/*
+ * Device driver for the Dallas Semiconductor DS1820 chip. Heavily
+ * based on the application note 126 "1-Wire Communications Through
+ * Software".
+ *
+ * http://www.maxim-ic.com/appnotes.cfm/appnote_number/126
+ */
+
+/*
+ * For now we stuff in Moteiv Corporation's unique OUI.
+ * From http://www.ethereal.com/distribution/manuf.txt:
+ * 00:12:75    Moteiv    # Moteiv Corporation
+ *
+ * The EUI-64 is a concatenation of the 24-bit OUI value assigned by
+ * the IEEE Registration Authority and a 40-bit extension identifier
+ * assigned by the organization with that OUI assignment.
+ */
+
+#include <avr/io.h>
+#include <string.h>
+#include "contiki.h"
+#include "ds1820.h"
+
+
+unsigned char ds1820_id[8];
+unsigned char ds1820_ok[8];
+
+/* 1-wire is at PortE.3 */
+#define SERIAL_ID_PIN_READ PINE
+//#define SERIAL_ID_PIN_MASK _BV(PE3)
+#define SERIAL_ID_PIN_MASK _BV(PE4)
+#define SERIAL_ID_PxOUT PORTE
+#define SERIAL_ID_PxDIR DDRE
+
+#define SET_PIN_INPUT() (SERIAL_ID_PxDIR &= ~SERIAL_ID_PIN_MASK)
+#define SET_PIN_OUTPUT() (SERIAL_ID_PxDIR |= SERIAL_ID_PIN_MASK)
+
+#define OUTP_0() (SERIAL_ID_PxOUT &= ~SERIAL_ID_PIN_MASK)
+#define OUTP_1() (SERIAL_ID_PxOUT |= SERIAL_ID_PIN_MASK) 
+
+#define PIN_INIT() do{  \
+                     SET_PIN_INPUT();    \
+                     OUTP_0();           \
+                   } while(0)
+
+
+/* Drive the one wire interface low */
+#define OW_DRIVE() do {                    \
+                     SET_PIN_OUTPUT();     \
+                     OUTP_0();             \
+                   } while (0)
+
+/* Release the one wire by turning on the internal pull-up. */
+#define OW_RELEASE() do {                  \
+                       SET_PIN_INPUT();    \
+                       OUTP_1();           \
+                     } while (0)
+
+/* Read one bit. */
+#define INP()  (SERIAL_ID_PIN_READ & SERIAL_ID_PIN_MASK)
+
+
+/*
+ * Delay times in us.
+ */
+#define tA 6          /* min-5, recommended-6, max-15 */              
+#define tB 64         /* min-59, recommended-64, max-N/A */
+#define tC 60         /* min-60, recommended-60, max-120 */			
+#define tD 10         /* min-5.3, recommended-10, max-N/A */
+#define tE 9          /* min-0.3, recommended-9, max-9.3 */
+#define tF 55         /* min-50, recommended-55, max-N/A */
+#define tG 0          /* min-0, recommended-0, max-0 */
+#define tH 480        /* min-480, recommended-480, max-640 */
+#define tI 70         /* min-60.3, recommended-70, max-75.3 */
+#define tJ 410        /* min-410, recommended-410, max-N/A */
+/*---------------------------------------------------------------------------*/
+#define udelay(u) clock_delay_usec(u)
+/*---------------------------------------------------------------------------*/
+
+static int
+owreset(void)
+{
+  int result;
+
+  OW_DRIVE();
+  udelay(tH);     /* 480 < tH < 640 */
+  OW_RELEASE();    /* Releases the bus */
+  udelay(tI);
+  result = INP();
+  udelay(tJ);
+  return result;
+}
+/*---------------------------------------------------------------------------*/
+static void
+owwriteb(unsigned byte)
+{
+  int i = 7;
+
+  do {
+    if(byte & 0x01) {
+      OW_DRIVE();
+      udelay(tA);
+      OW_RELEASE();    /* Releases the bus */
+      udelay(tB);
+    } else {
+      OW_DRIVE();
+      udelay(tC);
+      OW_RELEASE();    /* Releases the bus */
+      udelay(tD);
+    }
+    if(i == 0) {
+      return;
+    }
+    i--;
+    byte >>= 1;
+  } while(1);
+}
+/*---------------------------------------------------------------------------*/
+static unsigned
+owreadb(void)
+{
+  unsigned result = 0;
+  int i = 7;
+
+  do {
+    OW_DRIVE();
+    udelay(tA);
+    OW_RELEASE();	/* Releases the bus */
+    udelay(tE);
+    if (INP()){
+      result |= 0x80;	/* LSbit first */
+    }
+    udelay(tF);
+    if(i == 0) {
+      return result;
+    }
+    i--;
+    result >>= 1;
+  } while(1);
+}
+/*---------------------------------------------------------------------------*/
+/* Polynomial ^8 + ^5 + ^4 + 1 */
+static unsigned
+crc8_add(unsigned acc, unsigned byte)
+{
+  int i;
+  acc ^= byte;
+  for(i = 0; i < 8; i++) {
+    if(acc & 1) {
+      acc = (acc >> 1) ^ 0x8c;
+    } else {
+      acc >>= 1;
+    }
+  }
+  return acc;
+}
+/*---------------------------------------------------------------------------*/
+int
+ds1820_init()
+{
+  int i;
+  unsigned family, crc, acc;
+
+  PIN_INIT();
+
+  if(owreset() == 0) {	/* Something pulled down 1-wire. */
+
+    owwriteb(0x33);		/* Read ROM command. */
+    family = owreadb();
+    /* We receive 6 bytes in the reverse order, LSbyte first. */
+    for(i = 7; i >= 2; i--) {
+      ds1820_id[i] = owreadb();
+    }
+    crc = owreadb();
+
+    /* Verify family DS1820 and that CRC match. */
+    if(family != 0x10) {
+      goto fail;
+    }
+    acc = crc8_add(0x0, family);
+    for(i = 7; i >= 2; i--) {
+      acc = crc8_add(acc, ds1820_id[i]);
+    }
+    if(acc == crc) {
+      ds1820_id[0] = 0x00;
+      ds1820_id[1] = 0x00;
+      ds1820_id[2] = 0x00;
+      return 1;			/* Success! */
+    }
+  } else {
+  }
+
+
+ fail:
+  memset(ds1820_id, 0x0, sizeof(ds1820_id));
+  return 0;			/* Fail! */
+}
+/*---------------------------------------------------------------------------*/
+int
+ds1820_temp()
+{
+    ds1820_convert();
+// wait max 750ms pin lo
+    clock_wait(CLOCK_SECOND);
+    ds1820_read();
+    return 1;
+}
+
+int
+ds1820_convert()
+{
+  unsigned i;
+
+  PIN_INIT();
+  for(i=0;i<3;i++){
+  if(owreset() == 0) {	/* Something pulled down 1-wire. */
+    owwriteb(0xCC);		/* Skip ROM command. */
+    owwriteb(0x44);		/* Convert T command. */
+    OW_RELEASE();    /* Releases the bus */
+    return 1;
+  } else {
+  }
+  }
+  return 0;			/* Fail! */
+}
+/*---------------------------------------------------------------------------*/
+int
+ds1820_read()
+{
+  int i;
+  unsigned crc, acc;
+
+  if(owreset() == 0) {	/* Something pulled down 1-wire. */
+    owwriteb(0xCC);		/* Skip ROM command. */
+    owwriteb(0xBE);		/* Read Scratchpad command. */
+    /* We receive 8 bytes in the reverse order, LSbyte first. */
+    for(i = 0; i < 8; i++) {
+      ds1820_id[i] = owreadb();
+    }
+      crc = owreadb();
+
+    acc=0;
+    for(i = 0; i < 8; i++) {
+      acc = crc8_add(acc, ds1820_id[i]);
+    }
+    if(acc == crc) {
+      // store temp
+      for(i = 0; i < 8; i++) {
+         ds1820_ok[i]=ds1820_id[i];
+      }
+      return 1;			/* Success! */
+    } else {
+        return 0;			/* Fail! */
+    }
+  } else {
+    return 0;			/* Fail! */
+  }
+  return 1;			/* Fail! */
+}

cpu/avr/dev/ds1820.h

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2005, Swedish Institute of Computer Science
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * This file is part of the Contiki operating system.
+ *
+ * @(#)$Id: ds1820.h,v 1.1 2006/06/17 22:41:16 adamdunkels Exp $
+ */
+/* -*- C -*- */
+/* @(#)$Id: ds1820.h,v 1.1 2006/06/17 22:41:16 adamdunkels Exp $ */
+
+#ifndef DS1820_H
+#define DS1820_H
+
+extern unsigned char ds1820_id[8];
+extern unsigned char ds1820_ok[8];
+extern int ds1820_init();
+extern int ds1820_convert();
+extern int ds1820_read();
+extern int ds1820_temp();
+#endif /* DS1820_H */

cpu/avr/dev/i2c.c

@@ -0,0 +1,391 @@
+/*
+ * Copyright (c) 2014, Ingo Gulyas Intembsys
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * This file is part of the Contiki operating system.
+ *
+ */
+
+ /**
+ * \file
+ *         I2C driver for ATMEGA128rfa1
+ *
+ * \author
+ *         Ingo Gulyas Intembsys
+ *         office@intembsys.at
+ *         www.intembsys.at
+ */
+
+
+#include "i2c.h"
+#include "contiki-conf.h"
+#include <stdint.h>
+#include <avr/power.h>
+#include <stdbool.h>
+#include <stddef.h>
+
+#if I2C_TD != 0
+#include <stdio.h>
+#include <avr/pgmspace.h>
+#include "system_mgmt.h"
+#define PRINTD(FORMAT,args...) {sleep_acquire_lock(); printf_P(PSTR(FORMAT),##args); sleep_release_lock();}
+#else
+#define PRINTD(...)
+#endif
+
+#if WITH_RTDEBUG == 1
+#include "rtdebug.h"
+#define RTDEBUG_PUSH(x) rtdebug_push(x)
+#else
+#warning "I2C Driver compiling without RTDEBUG!"
+#define RTDEBUG_PUSH(x)
+#endif
+
+#ifndef TIMEOUT_TIMER
+#warning "I2C Driver compiling without TIMEOUT!"
+#endif
+
+
+static int8_t wait_job();
+static int8_t wait_stop();
+
+static int8_t i2c_ioctl(const i2c_driver* const me, uint8_t cmd, uint8_t arg);
+static int8_t i2c_read(const i2c_driver* const me, uint8_t cmd_flags, uint8_t* buffer, uint8_t len);
+static int8_t i2c_write(const i2c_driver* const me, uint8_t cmd_flags, const uint8_t* data, uint8_t len);
+
+
+// static linkage of member functions
+i2c_driver i2c_drv = {i2c_ioctl, i2c_read, i2c_write};
+// lock spi if driver opened to prevent further opening access
+static volatile bool i2c_lock = false;
+
+
+///////////////////////////////////////////////////////////////
+// global functions
+///////////////////////////////////////////////////////////////
+
+i2c_driver* i2c_open(void)
+{
+	if(i2c_lock == true)
+	{
+		RTDEBUG_PUSH(RTDEBUG_CODE__I2C_OPEN__DEVICE_BUSY);
+		return NULL;
+	}	
+	 
+	i2c_lock = true;
+	power_twi_enable();
+	I2C_INIT();	
+
+	TWBR = I2C_FREQ_STANDARD;
+	TWSR &= ~((1<<TWPS1) | (1<<TWPS0));
+	TWSR |= (1<<TWPS0);
+	TWCR = (1<<TWEN);
+	
+	return &i2c_drv;
+}
+
+void i2c_close(i2c_driver* const me)
+{
+	if(me == NULL || i2c_lock == false)
+	{
+		RTDEBUG_PUSH(RTDEBUG_CODE__I2C_CLOSE__NO_DEVICE);
+		return;
+	}
+	
+	i2c_reset();
+	
+	return;
+}
+
+void i2c_reset(void)
+{
+	TWCR &= ~(1<<TWEN);
+	I2C_DEINIT();
+	power_twi_disable();
+	i2c_lock = false;
+	
+	return;
+}
+
+
+///////////////////////////////////////////////////////////////
+// local helper functions
+///////////////////////////////////////////////////////////////
+
+#ifdef TIMEOUT_TIMER
+	static int8_t wait_job()
+	{
+		int8_t status = I2C_OK;	
+		uint16_t timeout = TIMEOUT_TIMER_NOW_ADD(I2C_TIMEOUT);
+	
+
+		while (!(TWCR & (1<<TWINT)))
+		{
+			if(!(TIMEOUT_TIMER_LT(TIMEOUT_TIMER_NOW(), timeout)))
+			{
+				status = I2C_ERROR_TIMEOUT;
+				break;
+			}	
+		}
+	
+		return status;
+	}
+	
+	static int8_t wait_stop()
+	{
+		int8_t status = I2C_OK;	
+		uint16_t timeout = TIMEOUT_TIMER_NOW_ADD(I2C_TIMEOUT);
+	
+
+		while (TWCR & (1<<TWSTO))
+		{
+			if(!(TIMEOUT_TIMER_LT(TIMEOUT_TIMER_NOW(), timeout)))
+			{
+				status = I2C_ERROR_TIMEOUT;
+				break;
+			}	
+		}
+	
+		return status;
+	}
+#else
+	static int8_t wait_job()
+	{
+		while (!(TWCR & (1<<TWINT)));
+		return I2C_OK;
+	}
+	
+	static int8_t wait_stop()
+	{
+		while (TWCR & (1<<TWSTO));
+		return I2C_OK;
+	}
+#endif
+
+
+///////////////////////////////////////////////////////////////
+// member functions
+///////////////////////////////////////////////////////////////
+
+static int8_t i2c_ioctl(const i2c_driver* const me, uint8_t cmd, uint8_t arg)
+{
+	if(me == NULL || i2c_lock == false)
+	{
+		RTDEBUG_PUSH(RTDEBUG_CODE__I2C_IOCTL__DEVICE_CLOSED);
+		return I2C_ERROR_DRIVER;
+	}
+		
+	if(cmd == I2C_IOCTL_CMD_SET_FREQ)
+	{
+		switch(arg)
+		{
+			case I2C_FREQ_400KHZ:	TWBR = I2C_FREQ_400KHZ; break;
+			case I2C_FREQ_250KHZ:	TWBR = I2C_FREQ_250KHZ; break;
+			case I2C_FREQ_100KHZ:	TWBR = I2C_FREQ_100KHZ; break;
+			case I2C_FREQ_50KHZ:	TWBR = I2C_FREQ_50KHZ; break;
+			case I2C_FREQ_10KHZ:	TWBR = I2C_FREQ_10KHZ; break;
+			default:
+			{
+				RTDEBUG_PUSH(RTDEBUG_CODE__I2C_IOCTL__ARG_INVALID);
+				return I2C_ERROR_DRIVER;
+			}			
+		}
+	}
+	else
+	{
+		RTDEBUG_PUSH(RTDEBUG_CODE__I2C_IOCTL__CMD_INVALID);
+		return I2C_ERROR_DRIVER;
+	}
+	
+	return I2C_OK;
+}
+
+static int8_t i2c_read(const i2c_driver* const me, uint8_t cmd_flags, uint8_t* buffer, uint8_t len)
+{
+	uint8_t i = 0;
+	int8_t status = I2C_OK;
+	
+	
+	if(me == NULL || i2c_lock == false)
+	{
+		RTDEBUG_PUSH(RTDEBUG_CODE__I2C_READ__DEVICE_CLOSED);
+		return I2C_ERROR_DRIVER;
+	}	
+	
+	if((len > 0) && (buffer == NULL))
+	{
+		RTDEBUG_PUSH(RTDEBUG_CODE__I2C_READ__ERROR_NULLPOINTER);
+		return I2C_ERROR_DRIVER;
+	}
+	
+	do 
+	{
+		if(cmd_flags & I2C_CMD_FLAG_START)
+		{
+			I2C_START();
+			if(wait_job() != I2C_OK)
+			{
+				RTDEBUG_PUSH(RTDEBUG_CODE__I2C_READ__START_TIMEOUT);
+				status = I2C_ERROR_TIMEOUT;
+				break;
+			}
+			if((I2C_STATUS() != I2C_STATUS_START) && (I2C_STATUS() != I2C_STATUS_START_REP))
+			{
+				RTDEBUG_PUSH(RTDEBUG_CODE__I2C_READ__START_ERROR);
+				status = I2C_ERROR_START;
+				break;
+			}
+			PRINTD("I2C-RD-START\n");
+		}
+		
+		if(len == 0) break;
+		
+		for(i=0; i<(len-1); i++)
+		{
+			I2C_READ_BYTE_ACK();
+			if(wait_job() != I2C_OK)
+			{
+				RTDEBUG_PUSH(RTDEBUG_CODE__I2C_READ__READ_BYTE_ACK_TIMEOUT);
+				status = I2C_ERROR_TIMEOUT;
+				break;
+			}
+			if(I2C_STATUS() != I2C_STATUS_DATAR_ACK)
+			{
+				RTDEBUG_PUSH(RTDEBUG_CODE__I2C_READ__READ_BYTE_ACK_ERROR);
+				status = I2C_ERROR_READ;
+				break;
+			}
+			buffer[i] = I2C_RX_REG;
+			PRINTD("I2C-RD-RACK: 0x%02X\n", buffer[i]);
+		}
+		
+		I2C_READ_BYTE_NACK();
+		if(wait_job() != I2C_OK)
+		{
+			RTDEBUG_PUSH(RTDEBUG_CODE__I2C_READ__READ_BYTE_NACK_TIMEOUT);
+			status = I2C_ERROR_TIMEOUT;
+			break;
+		}
+		if(I2C_STATUS() != I2C_STATUS_DATAR_NACK)
+		{
+			RTDEBUG_PUSH(RTDEBUG_CODE__I2C_READ__READ_BYTE_NACK_ERROR);
+			status = I2C_ERROR_READ;
+			break;
+		}
+		buffer[i] = I2C_RX_REG;
+		PRINTD("I2C-RD-RNACK: 0x%02X\n", buffer[i]);
+		
+	} while (0);
+	
+	if(cmd_flags & I2C_CMD_FLAG_STOP)
+	{
+		I2C_STOP();
+		if(wait_stop() != I2C_OK)
+		{
+			RTDEBUG_PUSH(RTDEBUG_CODE__I2C_READ__STOP_TIMEOUT);
+			status = I2C_ERROR_TIMEOUT;
+		}
+		PRINTD("I2C-RD_STOP\n");
+	}
+	
+	return status;
+}
+
+static int8_t i2c_write(const i2c_driver* const me, uint8_t cmd_flags, const uint8_t* data, uint8_t len)
+{
+	uint8_t i = 0;
+	int8_t status = I2C_OK;
+	
+	
+	if(me == NULL || i2c_lock == false)
+	{
+		RTDEBUG_PUSH(RTDEBUG_CODE__I2C_WRITE__DEVICE_CLOSED);
+		return I2C_ERROR_DRIVER;
+	}
+	
+	if((len > 0) && (data == NULL))
+	{
+		RTDEBUG_PUSH(RTDEBUG_CODE__I2C_WRITE__ERROR_NULLPOINTER);
+		return I2C_ERROR_DRIVER;
+	}
+	
+	do 
+	{		
+		if(cmd_flags & I2C_CMD_FLAG_START)
+		{
+			I2C_START();
+			if(wait_job() != I2C_OK)
+			{
+				RTDEBUG_PUSH(RTDEBUG_CODE__I2C_WRITE__START_TIMEOUT);
+				status = I2C_ERROR_TIMEOUT;
+				break;
+			}
+			if((I2C_STATUS() != I2C_STATUS_START) && (I2C_STATUS() != I2C_STATUS_START_REP))
+			{
+				RTDEBUG_PUSH(RTDEBUG_CODE__I2C_WRITE__START_ERROR);
+				status = I2C_ERROR_START;
+				break;
+			}
+			PRINTD("I2C-WR-START\n");
+		}
+		
+		
+	
+		for(i=0; i<len; i++)
+		{
+			I2C_TX_REG = data[i];
+			I2C_WRITE_BYTE();
+			if(wait_job() != I2C_OK)
+			{
+				RTDEBUG_PUSH(RTDEBUG_CODE__I2C_WRITE__WRITE_BYTE_TIMEOUT);
+				status = I2C_ERROR_TIMEOUT;
+				break;
+			}
+			if((I2C_STATUS() != I2C_STATUS_DATAW_ACK) && (I2C_STATUS() != I2C_STATUS_SLAW_ACK) && (I2C_STATUS() != I2C_STATUS_SLAR_ACK))
+			{
+				RTDEBUG_PUSH(RTDEBUG_CODE__I2C_WRITE__WRITE_BYTE_ERROR);
+				status = I2C_ERROR_WRITE;
+				break;
+			}
+			PRINTD("I2C-WR-BYTE: 0x%02X\n", data[i]);
+		}
+
+	} while (0);
+	
+	if(cmd_flags & I2C_CMD_FLAG_STOP)
+	{
+		I2C_STOP();
+		if(wait_stop() != I2C_OK)
+		{
+			RTDEBUG_PUSH(RTDEBUG_CODE__I2C_WRITE__STOP_TIMEOUT);
+			status = I2C_ERROR_TIMEOUT;
+		}
+		PRINTD("I2C-WR-STOP\n");
+	}
+	
+	return status;
+}

cpu/avr/dev/i2c.h

@@ -0,0 +1,131 @@
+/*
+ * Copyright (c) 2014, Ingo Gulyas Intembsys
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * This file is part of the Contiki operating system.
+ *
+ */
+
+ /**
+ * \file
+ *         I2C driver for ATMEGA128rfa1
+ *
+ * \author
+ *         Ingo Gulyas Intembsys
+ *         office@intembsys.at
+ *         www.intembsys.at
+ */
+ 
+
+#ifndef I2C_H_
+#define I2C_H_
+
+
+#include <stdint.h>
+
+////////////////////////////////////////////////////////////////////////////////////////////
+// CONFIGURATION SECTION:
+
+#define I2C_TD          0			// compiler switch: i2c testdriver code
+
+#define I2C_PORT            PORTD
+#define I2C_DDR             DDRD
+#define I2C_SCL_PIN         0
+#define I2C_SDA_PIN         1
+
+// END OF CONFIGURATION SECTION
+////////////////////////////////////////////////////////////////////////////////////////////
+
+#define I2C_INIT()          ({I2C_DDR &= ~((1<<I2C_SCL_PIN) | (1<<I2C_SDA_PIN)); I2C_PORT |= ((1<<I2C_SCL_PIN) | (1<<I2C_SDA_PIN));})
+#define I2C_DEINIT()        ({I2C_DDR &= ~((1<<I2C_SCL_PIN) | (1<<I2C_SDA_PIN)); I2C_PORT |= ((1<<I2C_SCL_PIN) | (1<<I2C_SDA_PIN));})
+
+#define I2C_FREQ_STANDARD I2C_FREQ_50KHZ
+
+#if F_CPU == 16000000UL
+	#define	I2C_FREQ_400KHZ  0x03
+	#define	I2C_FREQ_250KHZ  0x06
+	#define	I2C_FREQ_100KHZ  0x12
+	#define	I2C_FREQ_50KHZ   0x26
+	#define I2C_FREQ_10KHZ   0xC6
+#else
+	#error "NO I2C FREQUENCY DEFINED -> CHECK F_CPU SETTINGS!"
+#endif
+
+
+#define I2C_STATUS_REG        TWSR
+#define I2C_TX_REG            TWDR
+#define I2C_RX_REG            TWDR
+
+#define I2C_START()           (TWCR = (1<<TWINT) |(1<<TWSTA) | (1<<TWEN))
+#define I2C_STOP()            (TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWSTO))
+#define I2C_WRITE_BYTE()      (TWCR = (1<<TWINT) | (1<<TWEN))
+#define I2C_READ_BYTE_ACK()   (TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWEA))
+#define I2C_READ_BYTE_NACK()  (TWCR = (1<<TWINT) | (1<<TWEN))
+#define I2C_STATUS()          (I2C_STATUS_REG & I2C_STATUS_MASK)
+
+#define I2C_STATUS_MASK       0xF8
+#define I2C_STATUS_START      0x08
+#define I2C_STATUS_START_REP  0x10
+#define I2C_STATUS_SLAW_ACK   0x18
+#define I2C_STATUS_DATAW_ACK  0x28
+#define I2C_STATUS_SLAR_ACK   0x40
+#define I2C_STATUS_DATAR_ACK  0x50
+#define I2C_STATUS_DATAR_NACK 0x58
+
+#define I2C_ADR_WR(adr)       ((adr<<1) & ~(1<<0))
+#define I2C_ADR_RD(adr)       ((adr<<1) | (1<<0))
+
+#define I2C_CMD_FLAG_NONE     0x00
+#define I2C_CMD_FLAG_START    (1<<0)
+#define I2C_CMD_FLAG_STOP     (1<<1)
+
+
+#define I2C_OK                0
+#define I2C_ERROR_DRIVER      -1
+#define I2C_ERROR_TIMEOUT     -2
+#define I2C_ERROR_START       -3
+#define I2C_ERROR_WRITE       -4
+#define I2C_ERROR_READ        -5
+
+
+#define I2C_IOCTL_CMD_SET_FREQ 0x01
+
+
+typedef struct i2c_driver i2c_driver;
+struct i2c_driver
+{
+	int8_t (*ioctl)(const i2c_driver* const me, uint8_t cmd, uint8_t arg);
+	int8_t (*read)(const i2c_driver* const me, uint8_t cmd_flags, uint8_t* buffer, uint8_t len);
+	int8_t (*write)(const i2c_driver* const me, uint8_t cmd_flags, const uint8_t* data, uint8_t len);
+};
+
+i2c_driver* i2c_open(void);
+void i2c_close(i2c_driver* const me);
+void i2c_reset(void);
+
+
+#endif /* I2C_H_ */

cpu/avr/dev/key.c

@@ -0,0 +1,73 @@
+/*
+ *  Copyright (c) 2010  harald pichler
+ *  All rights reserved.
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions are met:
+ *
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *  * Neither the name of the copyright holders nor the names of
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+/**
+ * \file
+ *
+ * \brief
+ *      This file provides Raven KEY support.
+ *
+ * \author
+ *      Harald Pichler harald@the-develop.net
+ *
+ */
+
+#include "key.h"
+
+/*---------------------------------------------------------------------------*/
+
+/**
+ *   \brief This will intialize the KEY for button readings.
+*/
+void
+key_init(void)
+{
+    /* Enter is input w/pullup */
+    DDRF &= ~(1<<PINF1);
+}
+
+/*---------------------------------------------------------------------------*/
+
+/**
+ *   \brief This will poll run key_task() to determine if a button has been pressed.
+ *
+ *   \retval True if button is pressed
+ *   \retval False if button is not pressed
+*/
+uint8_t
+is_button(void)
+{
+    /* Return true if button has been pressed. */
+    if ( PINF & (1<<PINF1) ) {
+        return 0;
+    }
+    else{
+        return 1;
+    }
+}

cpu/avr/dev/key.h

@@ -0,0 +1,50 @@
+/*
+ *  Copyright (c) 2010  Harald Pichler
+ *  All rights reserved.
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions are met:
+ *
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *  * Neither the name of the copyright holders nor the names of
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+/**
+ * \file
+ *
+ * \brief
+ *      This file provides Raven Key support.
+ *
+ * \author
+ *      Harald Pixhlwe harald@the-develop.net
+ *
+ */
+
+#ifndef __KEY_H__
+#define __KEY_H__
+
+#include <stdint.h>
+#include <avr/io.h>
+
+void	key_init(void);
+uint8_t	is_button(void);
+
+#endif /* __KEY_H__ */

cpu/avr/dev/led.c

@@ -0,0 +1,89 @@
+/*
+ *  Copyright (c) 2012  harald pichler
+ *  All rights reserved.
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions are met:
+ *
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *  * Neither the name of the copyright holders nor the names of
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+/**
+ * \file
+ *
+ * \brief
+ *      This file provides Raven LED support.
+ *
+ * \author
+ *      Harald Pichler harald@the-develop.net
+ *
+ */
+
+#include "led.h"
+
+/**
+ * \addtogroup relay
+ * \{
+*/
+/*---------------------------------------------------------------------------*/
+
+/**
+ * \brief Turns the Raven LED1 on.
+*/
+void
+led1_on(void)
+{
+    PORTE &= ~(1<<PINE5);
+    DDRE  |=  (1<<PINE5);
+}
+
+/*---------------------------------------------------------------------------*/
+
+/**
+ *  \brief Turns the Raven LED1 off.
+*/
+void
+led1_off(void)
+{
+    PORTE |= (1<<PINE5);
+    DDRE  |= (1<<PINE5);
+}
+/*---------------------------------------------------------------------------*/
+void
+led2_on(void)
+{
+    PORTE &= ~(1<<PINE4);
+    DDRE  |=  (1<<PINE4);
+}
+
+/*---------------------------------------------------------------------------*/
+
+/**
+ *  \brief Turns the Raven LED1 off.
+*/
+void
+led2_off(void)
+{
+    PORTE |= (1<<PINE4);
+    DDRE  |= (1<<PINE4);
+}
+/*---------------------------------------------------------------------------*/

cpu/avr/dev/led.h

@@ -0,0 +1,67 @@
+/*
+ *  Copyright (c) 2012  Harald Pichler
+ *  All rights reserved.
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions are met:
+ *
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *  * Neither the name of the copyright holders nor the names of
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+/**
+ * \file
+ *
+ * \brief
+ *      This file provides Raven LED support.
+ *
+ * \author
+ *      Harald Pichler harald@the-develop.net
+ *
+ */
+
+#ifndef __LED_H__
+#define __LED_H__
+
+#include <avr/io.h>
+
+/* Some io.h definitions of shift vary among processors */
+#ifndef DDE0
+#define DDE0 DDRE0
+#define DDE1 DDRE1
+#define DDE2 DDRE2
+#define DDE3 DDRE3
+#define DDE4 DDRE4
+#define DDE5 DDRE5
+#define DDE6 DDRE6
+#define DDE7 DDRE7
+#endif
+
+
+/** @name LED Functions */
+/** @{ */
+void led1_on(void);
+void led1_off(void);
+void led2_on(void);
+void led2_off(void);
+/** @} */
+
+#endif /* __LED_H__ */

cpu/avr/dev/optriac-sensor.c

@@ -0,0 +1,102 @@
+/*
+* Copyright (c) , Harald Pichler.
+* All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions
+* are met:
+* 1. Redistributions of source code must retain the above copyright
+* notice, this list of conditions and the following disclaimer.
+* 2. Redistributions in binary form must reproduce the above copyright
+* notice, this list of conditions and the following disclaimer in the
+* documentation and/or other materials provided with the distribution.
+* 3. Neither the name of the Institute nor the names of its contributors
+* may be used to endorse or promote products derived from this software
+* without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+* SUCH DAMAGE.
+*
+* @(#)$Id: servo-sensor.c,v 1.0 2013/02/20 19:34:06 nifi Exp $
+*/
+
+/**
+* \file
+* optriac sensor header file for Atmega128rfa1.
+* \author
+* Harald Pichler <harald@the-develop.net>
+*/
+
+#include "contiki.h"
+#include "Arduino.h"
+#include "dev/optriac-sensor.h"
+
+#define PRINTF(...) printf(__VA_ARGS__)
+
+const struct sensors_sensor optriac_sensor;
+static int status(int type);
+static int enabled = 0;
+static int optriac[2]={0,0};
+static int optriacpin[8]={OPTRIAC_PIN_1,OPTRIAC_PIN_2};
+
+/*---------------------------------------------------------------------------*/
+static int
+value(int type)
+{
+  return optriac[type];
+}
+/*---------------------------------------------------------------------------*/
+static int
+configure(int type, int c)
+{
+  switch(type) {
+  case SENSORS_ACTIVE:
+    if(c) {
+      if(!status(SENSORS_ACTIVE)) {
+		pinMode(optriacpin[OPTRIAC_SENSOR_1], OUTPUT);
+		digitalWrite(optriacpin[OPTRIAC_SENSOR_1], LOW);
+		pinMode(optriacpin[OPTRIAC_SENSOR_2], OUTPUT);
+		digitalWrite(optriacpin[OPTRIAC_SENSOR_2], LOW);
+
+        enabled = 1;
+      }
+    } else {
+      enabled = 1;
+    }
+    break;
+  case OPTRIAC_SENSOR_1:
+  case OPTRIAC_SENSOR_2:
+
+    if(c==0){
+	digitalWrite(optriacpin[type], LOW);
+	optriac[type]=0;
+    }else{
+	digitalWrite(optriacpin[type], HIGH);
+	optriac[type]=1;
+    };
+    break;
+  }
+  return 0;	
+}
+/*---------------------------------------------------------------------------*/
+static int
+status(int type)
+{
+  switch(type) {
+  case SENSORS_ACTIVE:
+  case SENSORS_READY:
+    return enabled;
+  }
+  return 0;
+}
+/*---------------------------------------------------------------------------*/
+SENSORS_SENSOR(optriac_sensor, OPTRIAC_SENSOR, value, configure, status); 

cpu/avr/dev/optriac-sensor.h

@@ -0,0 +1,54 @@
+/*
+* Copyright (c), Harald Pichler.
+* All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions
+* are met:
+* 1. Redistributions of source code must retain the above copyright
+* notice, this list of conditions and the following disclaimer.
+* 2. Redistributions in binary form must reproduce the above copyright
+* notice, this list of conditions and the following disclaimer in the
+* documentation and/or other materials provided with the distribution.
+* 3. Neither the name of the Institute nor the names of its contributors
+* may be used to endorse or promote products derived from this software
+* without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+* SUCH DAMAGE.
+*
+* @(#)$Id: servo-sensor.h,v 1.0 2013/02/20 19:34:06 nifi Exp $
+*/
+
+/**
+* \file
+* Servo sensor header file for Atmega128rfa1.
+* \author
+* Harald Pichler <harald@the-develop.net>
+*/
+
+#ifndef __OPTRIAC_SENSOR_H__
+#define __OPTRIAC_SENSOR_H__
+
+#include "lib/sensors.h"
+
+extern const struct sensors_sensor optriac_sensor;
+
+#define OPTRIAC_SENSOR "TRIAC"
+#define OPTRIAC_SENSOR_1          0
+#define OPTRIAC_SENSOR_2          1
+
+/* default pins Arduino-Merkurboard */
+#define OPTRIAC_PIN_1          2
+#define OPTRIAC_PIN_2          3
+
+#endif /* __OPTRIAC_SENSOR_H__ */ 

cpu/avr/dev/pir-sensor.c

@@ -0,0 +1,85 @@
+/* Sensor routine */
+#include "contiki.h"
+#include "lib/sensors.h"
+#include "dev/pir-sensor.h"
+
+#include <avr/interrupt.h>
+#include "led.h" // debug
+
+const struct sensors_sensor pir_sensor;
+
+static struct timer debouncetimer;
+static int status(int type);
+static int enabled = 0;
+struct sensors_sensor *sensors[1];
+unsigned char sensors_flags[1];
+
+#define PIR_BIT INTF6
+#define PIR_CHECK_IRQ() (EIFR & PIR_BIT) ? 0 : 1
+
+#define PRINTF(...) printf(__VA_ARGS__)
+/*---------------------------------------------------------------------------*/
+ISR(INT6_vect)
+{
+
+//  leds_toggle(LEDS_YELLOW);
+  
+  if(PIR_CHECK_IRQ()) {
+    if(timer_expired(&debouncetimer)) {
+ //   led1_on();
+      timer_set(&debouncetimer, CLOCK_SECOND / 4);
+      sensors_changed(&pir_sensor);
+ //   led1_off();
+    }
+  }
+
+}
+/*---------------------------------------------------------------------------*/
+
+static int
+value(int type)
+{
+ return (PORTE & _BV(PE6) ? 0 : 1) || !timer_expired(&debouncetimer);
+ //return 0;
+}
+
+static int
+configure(int type, int c)
+{
+	switch (type) {
+	case SENSORS_ACTIVE:
+		if (c) {
+			if(!status(SENSORS_ACTIVE)) {
+  //  led1_on();
+				timer_set(&debouncetimer, 0);
+				DDRE |= (0<<DDE6); // Set pin as input
+				PORTE |= (1<<PORTE6); // Set port PORTE bint 6 with pullup resistor
+				EICRB |= (3<<ISC60); // For rising edge
+				EIMSK |= (1<<INT6); // Set int
+				enabled = 1;
+				sei();
+  //  led1_off();
+			}
+		} else {
+				enabled = 0;
+				EIMSK &= ~(1<<INT6); // clear int
+		}
+		return 1;
+	}
+	return 0;
+}
+
+static int
+status(int type)
+{
+	switch (type) {
+	case SENSORS_ACTIVE:
+	case SENSORS_READY:
+		return enabled;//(EIMSK & (1<<INT6) ? 0 : 1);//PIR_IRQ_ENABLED();
+	}
+	return 0;
+}
+
+SENSORS_SENSOR(pir_sensor, PIR_SENSOR,
+	       value, configure, status);
+

cpu/avr/dev/pir-sensor.h

@@ -0,0 +1,48 @@
+/*
+* Copyright (c) 2012, BinaryLabs.
+* All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions
+* are met:
+* 1. Redistributions of source code must retain the above copyright
+* notice, this list of conditions and the following disclaimer.
+* 2. Redistributions in binary form must reproduce the above copyright
+* notice, this list of conditions and the following disclaimer in the
+* documentation and/or other materials provided with the distribution.
+* 3. Neither the name of the Institute nor the names of its contributors
+* may be used to endorse or promote products derived from this software
+* without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+* SUCH DAMAGE.
+*
+* @(#)$Id: battery-sensor.h,v 1.1 2012/08/25 19:34:06 nifi Exp $
+*/
+
+/**
+* \file
+* PIR sensor header file for Atmega128rfa1.
+* \author
+* Harald Pichler <harald@the-develop.net>
+*/
+
+#ifndef __PIR_SENSOR_H__
+#define __PIR_SENSOR_H__
+
+#include "lib/sensors.h"
+
+extern const struct sensors_sensor pir_sensor;
+
+#define PIR_SENSOR "PIR"
+
+#endif /* __PIR_SENSOR_H__ */