diff --git a/platform/sky/Makefile b/platform/sky/Makefile
new file mode 100644
index 000000000..5b80081a4
--- /dev/null
+++ b/platform/sky/Makefile
@@ -0,0 +1,116 @@
+# $Id: Makefile,v 1.1 2006/08/02 14:44:46 bg- Exp $
+#
+# This makefile requires GNU make!
+
+LIB = libcontiki.a
+KERNELS = gateway.ihex dhclient.ihex
+PROGS = loadable_prg.ko udpsend.ko udprecv.ko
+TOOLS = tunslip scat codeprop
+
+all: $(LIB) $(KERNELS) $(PROGS) $(TOOLS)
+
+gateway.out: gateway.o $(LIB)
+dhclient.out: dhclient.o $(LIB)
+
+CORE = ../../core
+INCDIRS = -I. -I../../cpu/msp430 -I$(CORE) -I../../apps
+SRCDIRS = dev  ../../cpu/msp430 ${addprefix $(CORE)/,sys dev net lib loader} ../../apps/codeprop
+
+MCU=msp430x1611
+
+ARCH=msp430.o leds.o leds-arch.o watchdog.o lpm.o light.o button.o spi.o ds2411.o rom.o xmem.o
+SYSTEM=process.o procinit.o service.o clock.o etimer.o timer.o \
+       elfloader.o symtab.o
+UIP=uip.o uiplib.o tcpip.o uip-fw.o uip-fw-service.o uipbuf.o \
+    tcpdump.o psock.o dhcpc.o uaodv.o uaodv-rt.o
+UIPDRIVERS=slip.o slip_uart1.o \
+           cc2420.o cc2420_uart0.o cc2420_send_ip.o cc2420_send_uaodv.o 
+LIBS=memb.o list.o malloc.o realloc.o malloc_compact.o rand.o crtk.o
+SYSAPPS=tcp_loader.o
+LIBFILES=$(SYSTEM) $(ARCH) $(UIP) $(UIPDRIVERS) $(LIBS) $(SYSAPPS)
+
+CP=cp
+LIBC=-lgcc -lc -lgcc
+CC=msp430-gcc
+LD=msp430-ld
+AS=msp430-as
+OBJCOPY=msp430-objcopy
+STRIP=msp430-strip
+AR=msp430-ar
+RANLIB=msp430-ranlib
+BSL=msp430-bsl
+CFLAGS=-mmcu=$(MCU) $(INCDIRS) -Wall -Os
+LDFLAGS=-mmcu=$(MCU)
+
+# Setup directory search path for source files
+vpath %.c $(SRCDIRS) ${filter-out CVS,${wildcard labs/*}}
+
+# Set COM port if not already set.
+# DOS: 1 => COM2, 2 => COM3, etc.
+# Linux: /dev/ttyUSB0, /dev/ttyUSB1, etc.
+# FreeBSD: /dev/ttyU0, /dev/ttyU1, etc.
+ifndef COMPORT
+  COMPORT := /dev/ttyUSB0
+endif
+
+
+%.o: %.c
+	$(CC) $(CFLAGS) -c $< -o $(notdir $(<:.c=.o))
+
+# Transform one .o to a .ko
+%.ko: %.o
+	$(STRIP) -K _init -K _fini --strip-unneeded -g -x $< -o $@
+
+# Combine several .o:s to one .ko
+# The msp430-ld can't do incremental linking, bogus output
+#%.ko %.o: $^
+#	/opt/msp430/bin/msp430-ld -r $< -o $@
+#	$(STRIP) -K _init -K _fini --strip-unneeded -g -x $@
+
+%.ihex: %.out
+	$(OBJCOPY) $^ -O ihex $@
+
+#%.out:
+#	$(if $^,$(CC) $(LDFLAGS) $(CFLAGS) -o $@ $^,$(error "NO TARGET $@"))
+
+# Add a namelist to the kernel
+%.out: $^
+	-test -f $@_nm.c || echo "unsigned symbols[1];" > $@_nm.c
+	$(CC) $(LDFLAGS) $(CFLAGS) -o $@ $^ $(LIBC) $@_nm.c
+	../../tools/msp430-make-symbols $@ > $@_tmp.c && mv $@_tmp.c $@_nm.c
+	$(CC) $(LDFLAGS) $(CFLAGS) -o $@ $^ $(LIBC) $@_nm.c
+
+%.u: %.ihex
+	$(BSL) --telosb -D -c $(COMPORT) -r -e -I -p $<
+
+$(LIB): $(LIBFILES)
+	$(AR) rcf $@ $^
+	$(RANLIB) $@
+
+codeprop: ../../tools/codeprop.c
+	cc -g -Wall $< -o $@
+
+tunslip: ../../tools/tunslip.c
+	cc -g -Wall $< -o $@
+
+scat: ../../tools/scat.c
+	cc -g -Wall $< -o $@
+
+### TEST ###
+
+test.out: test.o $(LIB)
+	$(CC) $(LDFLAGS) $(CFLAGS) -o $@ $^
+
+depend: $(LIBFILES:.o=.c)
+	-$(CC) $(CCDEPFLAGS) -MM $(CFLAGS) $(INCDIRS) $^ *.c >Makefile.depend
+
+tags: $(LIBFILES:.o=.c)
+	etags $^
+
+clean:
+	rm -f *.o *.ko *~ *.core *.out *.ihex *_nm.c
+	rm -f $(LIB) $(KERNELS) $(TOOLS)
+
+.PHONY: all
+
+-include Makefile.depend
diff --git a/platform/sky/contiki-conf.h b/platform/sky/contiki-conf.h
new file mode 100644
index 000000000..320f71335
--- /dev/null
+++ b/platform/sky/contiki-conf.h
@@ -0,0 +1,160 @@
+/* -*- C -*- */
+/* @(#)$Id: contiki-conf.h,v 1.1 2006/08/02 14:44:46 bg- Exp $ */
+
+#ifndef CONTIKI_CONF_H
+#define CONTIKI_CONF_H
+
+/* This is still experimental. /bg */
+#define UAODV_BAD_ROUTE
+
+/* Helper prototypes that should go somewhere. */
+void    splx_(int);
+int     splhigh_(void);
+void msp430_cpu_init(void);	/* Rename to cpu_init() later! */
+
+#define cpu_init() msp430_cpu_init()
+#define splhigh() splhigh_()
+#define splx(sr) __asm__ __volatile__("bis %0, r2" : : "r" (sr))
+
+#define TMOTE_SKY 1
+#define WITH_UIP 1
+#define WITH_ASCII 1
+
+#define PROCESS_CONF_FASTPOLL    4
+
+/* Our clock resolution, this is the same as Unix HZ. */
+#define CLOCK_CONF_SECOND 64
+
+#define UIP_CONF_DHCP_LIGHT
+#define UIP_CONF_LLH_LEN         0
+#define UIP_CONF_BUFFER_SIZE     116
+#define UIP_CONF_RECEIVE_WINDOW  (UIP_CONF_BUFFER_SIZE - 40)
+#define UIP_CONF_MAX_CONNECTIONS 4
+#define UIP_CONF_MAX_LISTENPORTS 8
+#define UIP_CONF_UDP_CONNS       6
+#define UIP_CONF_FWCACHE_SIZE    5
+#define UIP_CONF_BROADCAST       1
+#define UIP_ARCH_IPCHKSUM        1
+#define UIP_CONF_UDP_CHECKSUMS   1
+#define UIP_CONF_PINGADDRCONF    0
+#define UIP_CONF_LOGGING         0
+
+/*
+ * Definitions below are dictated by the hardware and not really
+ * changeable!
+ */
+
+/* LED ports */
+#define LEDS_PxDIR P5DIR
+#define LEDS_PxOUT P5OUT
+#define LEDS_CONF_RED    0x10
+#define LEDS_CONF_GREEN  0x20
+#define LEDS_CONF_YELLOW 0x40
+
+/* Button sensors. */
+#define IRQ_PORT2 0x02
+
+/* Reserve 64 bytes (only) for the runtime stack. */
+#define __malloc_heap_start ((char *)&__bss_end)
+#define __malloc_heap_end  (((char *)&__stack) - 64)
+
+typedef unsigned char u8_t;
+typedef unsigned short u16_t;
+typedef unsigned long u32_t;
+typedef unsigned short uip_stats_t;
+typedef unsigned short clock_time_t;
+
+typedef unsigned long off_t;
+#define ROM_ERASE_UNIT_SIZE  512
+#define XMEM_ERASE_UNIT_SIZE (64*1024L)
+
+/* Use the first 64k of external flash for codeprop. */
+#define EEPROMFS_ADDR_CODEPROP  0x00000
+
+/*
+ * SPI bus configuration for the TMote Sky.
+ */
+
+/* SPI input/output registers. */
+#define SPI_TXBUF U0TXBUF
+#define SPI_RXBUF U0RXBUF
+
+				/* USART0 Tx buffer ready? */ 
+#define	SPI_WAITFOREOTx() while ((U0TCTL & TXEPT) == 0)
+				/* USART0 Rx buffer ready? */
+#define	SPI_WAITFOREORx() while ((IFG1 & URXIFG0) == 0)
+
+#define SCK            1  /* P3.1 - Output: SPI Serial Clock (SCLK) */
+#define MOSI           2  /* P3.2 - Output: SPI Master out - slave in (MOSI) */
+#define MISO           3  /* P3.3 - Input:  SPI Master in - slave out (MISO) */
+
+/*
+ * SPI bus - M25P80 external flash configuration.
+ */
+
+#define FLASH_PWR	3	/* P4.3 Output */
+#define FLASH_CS	4	/* P4.4 Output */
+#define FLASH_HOLD	7	/* P4.7 Output */
+
+/* Enable/disable flash access to the SPI bus (active low). */
+
+#define SPI_FLASH_ENABLE()  ( P4OUT &= ~BV(FLASH_CS) )
+#define SPI_FLASH_DISABLE() ( P4OUT |=  BV(FLASH_CS) )
+
+#define SPI_FLASH_HOLD()		( P4OUT &= ~BV(FLASH_HOLD) )
+#define SPI_FLASH_UNHOLD()		( P4OUT |=  BV(FLASH_HOLD) )
+
+/*
+ * SPI bus - CC2420 pin configuration.
+ */
+
+#define FIFO_P         0  /* P1.0 - Input: FIFOP from CC2420 */
+#define FIFO           3  /* P1.3 - Input: FIFO from CC2420 */
+#define CCA            4  /* P1.4 - Input: CCA from CC2420 */
+
+#define SFD            1  /* P4.1 - Input:  SFD from CC2420 */
+#define CSN            2  /* P4.2 - Output: SPI Chip Select (CS_N) */
+#define VREG_EN        5  /* P4.5 - Output: VREG_EN to CC2420 */
+#define RESET_N        6  /* P4.6 - Output: RESET_N to CC2420 */
+
+/* Pin status. */
+
+#define FIFO_IS_1       (!!(P1IN & BV(FIFO)))
+#define CCA_IS_1        (!!(P1IN & BV(CCA) ))
+#define RESET_IS_1      (!!(P4IN & BV(RESET_N)))
+#define VREG_IS_1       (!!(P4IN & BV(VREG_EN)))
+#define FIFOP_IS_1      (!!(P1IN & BV(FIFO_P)))
+#define SFD_IS_1        (!!(P4IN & BV(SFD)))
+
+/* The CC2420 reset pin. */
+#define SET_RESET_INACTIVE()    ( P4OUT |=  BV(RESET_N) )    
+#define SET_RESET_ACTIVE()      ( P4OUT &= ~BV(RESET_N) )
+
+/* CC2420 voltage regulator enable pin. */
+#define SET_VREG_ACTIVE()       ( P4OUT |=  BV(VREG_EN) )
+#define SET_VREG_INACTIVE()     ( P4OUT &= ~BV(VREG_EN) )
+
+/* CC2420 rising edge trigger for external interrupt 0 (FIFOP). */
+#define FIFOP_INT_INIT() do {\
+  P1IES &= ~BV(FIFO_P);\
+  CLEAR_FIFOP_INT();\
+} while (0)
+
+/* FIFOP on external interrupt 0. */
+#define ENABLE_FIFOP_INT()          do { P1IE |= BV(FIFO_P); } while (0)
+#define DISABLE_FIFOP_INT()         do { P1IE &= ~BV(FIFO_P); } while (0)
+#define CLEAR_FIFOP_INT()           do { P1IFG &= ~BV(FIFO_P); } while (0)
+
+/* Enables/disables CC2420 access to the SPI bus (not the bus).
+ *
+ * These guys should really be renamed but are compatible with the
+ * original Chipcon naming.
+ *
+ * SPI_CC2420_ENABLE/SPI_CC2420_DISABLE???
+ * CC2420_ENABLE_SPI/CC2420_DISABLE_SPI???
+ */
+
+#define SPI_ENABLE()    ( P4OUT &= ~BV(CSN) ) /* ENABLE CSn (active low) */
+#define SPI_DISABLE()   ( P4OUT |=  BV(CSN) ) /* DISABLE CSn (active low) */
+
+#endif /* CONTIKI_CONF_H */
diff --git a/platform/sky/dev/light.c b/platform/sky/dev/light.c
new file mode 100644
index 000000000..7d6192b0f
--- /dev/null
+++ b/platform/sky/dev/light.c
@@ -0,0 +1,130 @@
+/*
+ * 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: light.c,v 1.1 2006/08/02 14:44:46 bg- Exp $
+ */
+
+#include <stdlib.h>
+
+#include <io.h>
+
+#include "contiki.h"
+#include "dev/light.h"
+
+/*
+ * Initialize periodic readings from the 2 photo diodes. The most
+ * recent readings will be stored in ADC internal registers/memory.
+ */
+void
+sensors_light_init(void)
+{
+  P6SEL |= 0x30;
+  P6DIR = 0xff;
+  P6OUT = 0x00;
+
+  /* Set up the ADC. */
+  ADC12CTL0 = REF2_5V + SHT0_6 + SHT1_6 + MSC; // Setup ADC12, ref., sampling time
+  ADC12CTL1 = SHP + CONSEQ_3 + CSTARTADD_0;	// Use sampling timer, repeat-sequenc-of-channels
+
+  ADC12MCTL0 = (INCH_4 + SREF_0); // photodiode 1 (P64)
+  ADC12MCTL1 = (INCH_5 + SREF_0); // photodiode 2 (P65)
+
+  ADC12CTL0 |= ADC12ON + REFON;
+
+  ADC12CTL0 |= ENC;		// enable conversion
+  ADC12CTL0 |= ADC12SC;		// sample & convert
+}
+
+/* Photosynthetically Active Radiation. */
+unsigned
+sensors_light1(void)
+{
+  return ADC12MEM0;
+}
+
+/* Total Solar Radiation. */
+unsigned
+sensors_light2(void)
+{
+  return ADC12MEM1;
+}
+
+/*
+ * Most of this information taken from
+ * http://www.moteiv.com/community/Getting_Data_from_Tmote_Sky%27s_Sensors
+ *
+ * The Photosynthetically Active Radiation (PAR) sensor as well as the
+ * Total Solar Radiation (TSR) sensor uses the 2.5V reference voltage
+ * to produce the raw ADC value.
+
+ * The voltage across each sensor is:
+ *
+ * VsensorPAR = ADCValuePAR/4096 * Vref       (1a)
+ * VsensorTSR = ADCValueTSR/4096 * Vref       (1b)
+ * where Vref = 2.5V
+ *
+ * This voltage creates a current through a resistor R=100KOhm and this
+ * current has a linear relationship with the light intensity in Lux.
+ * IPAR = VsensorPAR / 100,000             (2a) 
+ * ITSR = VsensorTSR / 100,000             (2b) 
+ *
+ * S1087    (PAR) lx = 1e6 * IPAR * 1000   (3a)  
+ * S1087-01 (TSR) lx = 1e5 * ITSR * 1000   (3b)
+ *
+ * lxPAR = 10e9 * ADCValuePAR *(1/4096)* Vref * 10e-5  or
+ * lxPAR = 3125* ADCvaluePAR / 512  
+ * and 
+ * lxTSR = 10e8 * ADCValueTSR *(1/4096)* Vref * 10e-5  or
+ * lxTSR = 625* ADCvalueTSR / 1024  
+*/
+
+#if 0
+/* Photosynthetically Active Radiation in Lux units. */
+unsigned
+sensors_light1_lux(void)
+{
+  unsigned temp;
+  temp = (uint32_t)ADC12MEM0;
+
+  temp = (temp*3125)>> 9; 
+  return (uint16_t)(temp & 0xFFFF); 
+}
+
+/* Total Solar Radiation in Lux units. */
+unsigned
+sensors_light2_lux(void)
+{
+  unsigned temp;
+  temp = (uint32_t)ADC12MEM1;
+
+  temp = (temp*625)>> 10; 
+  return (uint16_t)(temp & 0xFFFF); 
+}
+#endif
diff --git a/platform/sky/dev/light.h b/platform/sky/dev/light.h
new file mode 100644
index 000000000..09423c628
--- /dev/null
+++ b/platform/sky/dev/light.h
@@ -0,0 +1,41 @@
+/*
+ * 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: light.h,v 1.1 2006/08/02 14:44:46 bg- Exp $
+ */
+#ifndef __LIGHT_H__
+#define __LIGHT_H__
+
+void sensors_light_init(void);
+
+unsigned sensors_light1(void);
+unsigned sensors_light2(void);
+
+#endif /* __LIGHT_H__ */
diff --git a/platform/sky/dev/xmem.c b/platform/sky/dev/xmem.c
new file mode 100644
index 000000000..c3858537f
--- /dev/null
+++ b/platform/sky/dev/xmem.c
@@ -0,0 +1,243 @@
+/*
+ * Copyright (c) 2006, 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. 
+ *
+ * @(#)$Id: xmem.c,v 1.1 2006/08/02 14:44:46 bg- Exp $
+ */
+
+/*
+ * Device driver for the ST M25P80 40MHz 1Mbyte external memory.
+ *
+ * Data is written bit inverted (~-operator) to flash so that
+ * unwritten data will read as zeros (UNIX style).
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include <io.h>
+#include <signal.h>
+
+#include "contiki.h"
+
+#include "dev/spi.h"
+#include "dev/xmem.h"
+
+#define  SPI_FLASH_INS_WREN        0x06
+#define  SPI_FLASH_INS_WRDI        0x04
+#define  SPI_FLASH_INS_RDSR        0x05
+#define  SPI_FLASH_INS_WRSR        0x01
+#define  SPI_FLASH_INS_READ        0x03
+#define  SPI_FLASH_INS_FAST_READ   0x0b
+#define  SPI_FLASH_INS_PP          0x02
+#define  SPI_FLASH_INS_SE          0xd8
+#define  SPI_FLASH_INS_BE          0xc7
+#define  SPI_FLASH_INS_DP          0xb9
+#define  SPI_FLASH_INS_RES         0xab
+
+static void
+write_enable(void)
+{
+  int s;
+
+  s = splhigh();
+  SPI_FLASH_ENABLE();
+  
+  FASTSPI_TX(SPI_FLASH_INS_WREN);
+
+  SPI_FLASH_DISABLE();
+  splx(s);
+}
+
+static unsigned
+read_status_register(void)
+{
+  unsigned char u;
+
+  int s;
+
+  s = splhigh();
+  SPI_FLASH_ENABLE();
+  
+  FASTSPI_TX(SPI_FLASH_INS_RDSR);
+
+  FASTSPI_CLEAR_RX();
+  FASTSPI_RX(u);
+
+  SPI_FLASH_DISABLE();
+  splx(s);
+
+  return u;
+}
+
+/*
+ * Wait for a write operation to finish.
+ */
+static unsigned
+eeprom_finish(void)
+{
+  unsigned u;
+  do {
+    u = read_status_register();
+  } while(u & 0x01);		/* WIP=1, write in progress */
+  return u;
+}
+
+/*
+ * Erase 64kBytes of date, it takes about 1s before WIP goes low!
+ */
+static void
+sector_erase(unsigned long offset)
+{
+  int s;
+
+  eeprom_finish();
+
+  write_enable();
+
+  s = splhigh();
+  SPI_FLASH_ENABLE();
+  
+  FASTSPI_TX(SPI_FLASH_INS_SE);
+  FASTSPI_TX(offset >> 16);	/* MSB */
+  FASTSPI_TX(offset >> 8);
+  FASTSPI_TX(offset >> 0);	/* LSB */
+
+  SPI_FLASH_DISABLE();
+  splx(s);
+}
+
+/*
+ * Initialize external flash *and* SPI bus!
+ */
+void
+xmem_init(void)
+{
+  spi_init();
+
+  P4DIR |= BV(FLASH_CS) | BV(FLASH_HOLD) | BV(FLASH_PWR);
+  P4OUT |= BV(FLASH_PWR);       /* P4.3 Output, turn on power! */
+
+  SPI_FLASH_DISABLE();		/* Unselect flash. */
+  SPI_FLASH_UNHOLD();
+}
+
+int
+xmem_pread(void *_p, int size, off_t offset)
+{
+  unsigned char *p = _p;
+  const unsigned char *end = p + size;
+  int s;
+
+  eeprom_finish();
+
+  s = splhigh();
+  SPI_FLASH_ENABLE();
+
+  FASTSPI_TX(SPI_FLASH_INS_READ);
+  FASTSPI_TX(offset >> 16);	/* MSB */
+  FASTSPI_TX(offset >> 8);
+  FASTSPI_TX(offset >> 0);	/* LSB */
+  
+  FASTSPI_CLEAR_RX();
+  for(; p < end; p++) {
+    unsigned char u;
+    FASTSPI_RX(u);
+    *p = ~u;
+  }
+
+  SPI_FLASH_DISABLE();
+  splx(s);
+  return size;
+}
+
+static const char *
+eeprom_page_program(unsigned long offset, const unsigned char *p, int nbytes)
+{
+  const unsigned char *end = p + nbytes;
+  int s;
+
+  eeprom_finish();
+
+  write_enable();
+
+  s = splhigh();
+  SPI_FLASH_ENABLE();
+  
+  FASTSPI_TX(SPI_FLASH_INS_PP);
+  FASTSPI_TX(offset >> 16);	/* MSB */
+  FASTSPI_TX(offset >> 8);
+  FASTSPI_TX(offset >> 0);	/* LSB */
+
+  for(; p < end; p++) {
+    FASTSPI_TX(~*p);
+  }
+
+  SPI_FLASH_DISABLE();
+  splx(s);
+
+  return p;
+}
+
+int
+xmem_pwrite(const void *_buf, int size, off_t addr)
+{
+  const unsigned char *buf = _buf;
+  unsigned i, next_page, end;
+  const char *p = buf;
+  
+  end = addr + size;
+  for(i = addr; i < end;) {
+    next_page = (i | 0xff) + 1;
+    if(next_page > end)
+      next_page = end;
+    p = eeprom_page_program(i, p, next_page - i);
+    i = next_page;
+  }
+  return size;
+}
+
+int
+xmem_erase(long size, off_t addr)
+{
+  off_t end = addr + size;
+
+  if(size % XMEM_ERASE_UNIT_SIZE != 0) {
+    printf("xmem_erase: bad size\n");
+    return -1;
+  }
+
+  if(addr % XMEM_ERASE_UNIT_SIZE != 0) {
+    printf("xmem_erase: bad offset\n");
+    return -1;
+  }
+
+  for (; addr < end; addr += XMEM_ERASE_UNIT_SIZE)
+    sector_erase(addr);
+
+  return size;
+}
diff --git a/platform/sky/dhclient.c b/platform/sky/dhclient.c
new file mode 100644
index 000000000..2ea101e92
--- /dev/null
+++ b/platform/sky/dhclient.c
@@ -0,0 +1,266 @@
+/*
+ * Copyright (c) 2006, 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. 
+ *
+ * @(#)$Id: dhclient.c,v 1.1 2006/08/02 14:44:46 bg- Exp $
+ */
+
+/*
+ * Example mote configuration with one radio interface that uses DHCP
+ * to configure its IP stack.
+ *
+ * The gateway systems must be configured to find what DHCP server to
+ * use, this can be done with an extra argument to tunslip, example:
+ *
+ * sliphost# ./tunslip 172.16.0.1 255.255.0.0 193.10.66.195
+ *
+ *
+ * This kernel has no application code but new modules can be uploaded
+ * using the codeprop program, example:
+ *
+ * datan$ ./codeprop 172.16.0.1 loadable_prg.ko
+ * File successfully sent (1116 bytes)
+ * Reply: ok
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "contiki.h"
+
+/* Also IP output. */
+#include "net/uip-fw-service.h"
+#include "net/uaodv.h"
+#include "net/dhcpc.h"
+#include "dev/slip.h"
+#include "dev/cc2420.h"
+
+#include "dev/lpm.h"
+#include "dev/ds2411.h"
+#include "dev/leds.h"
+#include "dev/light.h"
+#include "dev/xmem.h"
+
+#include "dev/button.h"
+
+#include "codeprop/codeprop.h"
+
+/* This is how we force inclusion of the psock library. */
+#include "net/psock.h"
+void *force_psock_inclusion = &psock_init;
+
+void uip_log(char *msg) { puts(msg); }
+
+struct uip_fw_netif cc2420if =
+{UIP_FW_NETIF(0,0,0,0, 255,255,255,255, cc2420_send_uaodv)};
+
+PROCESS(button_process, "Button process");
+PROCESS(dhclient_process, "Dhclient process");
+
+/* Radio stuff in network byte order. */
+static u16_t panId = HTONS(0x2024);
+
+#define RF_CHANNEL              26
+
+int
+main(int argc, char **argv)
+{
+  /*
+   * Initalize hardware.
+   */
+  msp430_cpu_init();
+  clock_init();
+  leds_init();
+  leds_toggle(LEDS_RED | LEDS_GREEN | LEDS_BLUE);
+  slip_arch_init();		/* Must come before first printf */
+  printf("Starting %s "
+	 "($Id: dhclient.c,v 1.1 2006/08/02 14:44:46 bg- Exp $)\n", __FILE__);
+  ds2411_init();
+  sensors_light_init();
+  cc2420_init();
+  xmem_init();
+  button_init(&button_process);
+  leds_toggle(LEDS_RED | LEDS_GREEN | LEDS_BLUE);
+  /*
+   * Hardware initialization done!
+   */
+  
+  printf("MAC %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
+	 ds2411_id[0], ds2411_id[1], ds2411_id[2], ds2411_id[3],
+	 ds2411_id[4], ds2411_id[5], ds2411_id[6], ds2411_id[7]);
+
+  srand((ds2411_id[3]<<8) + (ds2411_id[4]<<6) + (ds2411_id[5]<<4) +
+	(ds2411_id[6]<<2) +  ds2411_id[7]);
+
+  /*
+   * Initialize Contiki and our processes.
+   */
+  process_init();
+  process_start(&etimer_process, NULL);
+
+  /* Configure IP stack. */
+  uip_init();
+  
+  /* Start IP stack. */
+  process_start(&tcpip_process, NULL);
+  process_start(&uip_fw_process, NULL);	/* Start IP output */
+  process_start(&cc2420_process, NULL);
+  cc2420_on();
+  process_start(&dhclient_process, NULL);
+
+  process_start(&button_process, NULL);
+  process_start(&tcp_loader_process, NULL);
+
+  /*
+   * This is the scheduler loop.
+   */
+  printf("process_run()...\n");
+  lpm_on();
+  while (1) {
+    do {
+      /* Reset watchdog. */
+    } while(process_run() > 0);
+    /* Idle processing. */
+    LPM_SLEEP();
+  }
+
+  return 0;
+}
+
+PROCESS_THREAD(button_process, ev, data)
+{
+  static struct etimer etimer;
+
+  PROCESS_EXITHANDLER(goto exit);
+  PROCESS_BEGIN();
+
+  printf("button_process starting\n");
+
+  while(1) {
+    PROCESS_WAIT_EVENT();
+
+    if(ev == PROCESS_EVENT_MSG && data != NULL
+       && ((struct button_msg *)data)->type == BUTTON_MSG_TYPE) {
+      printf("button press\n");
+
+      leds_toggle(LEDS_RED | LEDS_GREEN | LEDS_BLUE);
+      etimer_set(&etimer, CLOCK_SECOND);
+      PROCESS_WAIT_UNTIL(etimer_expired(&etimer));
+      leds_toggle(LEDS_RED | LEDS_GREEN | LEDS_BLUE);
+    }
+  }
+
+ exit:
+  printf("button_process exiting\n");
+  PROCESS_END();
+}
+
+PROCESS_THREAD(dhclient_process, ev, data)
+{
+  PROCESS_EXITHANDLER(goto exit);
+  PROCESS_BEGIN();
+
+  printf("dhclient_process starting\n");
+
+  leds_on(LEDS_GREEN);
+
+  uip_setipid(rand());
+
+  /* For now use 0.0.0.0 as our IP address. */
+  uip_ipaddr(&uip_hostaddr, 0,0,0,0);
+  cc2420_set_chan_pan_addr(RF_CHANNEL, panId, uip_hostaddr[1], ds2411_id);
+
+  /* Use only radio interface and enable forwarding. */
+  uip_fw_default(&cc2420if);
+  tcpip_set_forwarding(1);
+  /* No default router yet. */
+
+  dhcpc_init(ds2411_id, sizeof(ds2411_id));
+  dhcpc_request();
+
+  while(1) {
+    PROCESS_WAIT_EVENT();
+    dhcpc_appcall(ev, data);
+  }
+
+ exit:
+  printf("dhclient_process exiting\n");
+  PROCESS_END();
+}
+
+static char is_configured;
+
+#define ip2quad(p) uip_ipaddr1(p),uip_ipaddr2(p),uip_ipaddr3(p),uip_ipaddr4(p)
+
+void
+dhcpc_configured(const struct dhcpc_state *s)
+{
+  if(is_configured)
+    printf("dhcp reconfigure %d.%d.%d.%d\n", ip2quad(&s->ipaddr));
+  else {
+    printf("dhcpc_configured %d.%d.%d.%d\n", ip2quad(&s->ipaddr));
+    leds_off(LEDS_GREEN);
+    is_configured = 1;
+    process_start(&uaodv_process, NULL);
+  }
+
+  uip_sethostaddr(s->ipaddr);
+  uip_setnetmask(s->netmask);
+  uip_setdraddr(s->default_router);
+
+  uip_ipaddr_copy(&cc2420if.ipaddr,  s->ipaddr);
+  uip_ipaddr_copy(&cc2420if.netmask, s->netmask);
+  /* resolv_conf(s->dnsaddr); */
+
+  /*
+   * Now we also have a new short MAC address!
+   */
+  cc2420_set_chan_pan_addr(RF_CHANNEL, panId, uip_hostaddr[1], ds2411_id);
+
+  /* Use only radio interface and enable forwarding. */
+  uip_fw_init();
+  tcpip_set_forwarding(1);
+  uip_fw_default(&cc2420if);
+}
+
+void
+dhcpc_unconfigured(const struct dhcpc_state *s)
+{
+  printf("dhcpc_unconfigured\n");
+  leds_on(LEDS_GREEN);
+  is_configured = 0;
+  process_exit(&uaodv_process);
+
+  uip_ipaddr(uip_hostaddr, 0,0,0,0);
+  uip_ipaddr(uip_netmask, 0,0,0,0);
+  uip_ipaddr(uip_draddr, 0,0,0,0);
+
+  /* New short MAC address. */
+  cc2420_set_chan_pan_addr(RF_CHANNEL, panId, uip_hostaddr[1], ds2411_id);
+}
diff --git a/platform/sky/gateway.c b/platform/sky/gateway.c
new file mode 100644
index 000000000..38cc6291b
--- /dev/null
+++ b/platform/sky/gateway.c
@@ -0,0 +1,169 @@
+/*
+ * Copyright (c) 2006, 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. 
+ *
+ * @(#)$Id: gateway.c,v 1.1 2006/08/02 14:44:46 bg- Exp $
+ */
+
+/*
+ * Example gateway configuration with two IP interfaces, one SLIP over
+ * USB and one over 802.11.4 radio.
+ *
+ * The IP address is hardcoded to 172.16.0.1 and the 172.16/16 network
+ * is on the radio interface.
+ *
+ * The default route is over the SLIP interface.
+ *
+ * On the SLIP host run a standard SLIP implementation or the tunslip
+ * program that can also view debug printfs, example:
+ *
+ * sliphost# ./tunslip 172.16.0.1 255.255.0.0
+ *
+ *
+ * This kernel has no application code but new modules can be uploaded
+ * using the codeprop program, example:
+ *
+ * datan$ ./codeprop 172.16.0.1 loadable_prg.ko
+ * File successfully sent (1116 bytes)
+ * Reply: ok
+ *
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include "contiki.h"
+
+/* Also IP output. */
+#include "net/uip-fw-service.h"
+#include "net/uaodv.h"
+#include "dev/slip.h"
+#include "dev/cc2420.h"
+
+#include "dev/lpm.h"
+#include "dev/ds2411.h"
+#include "dev/leds.h"
+#include "dev/light.h"
+#include "dev/xmem.h"
+
+#include "dev/button.h"
+
+#include "codeprop/codeprop.h"
+
+#define ip2quad(p) uip_ipaddr1(p),uip_ipaddr2(p),uip_ipaddr3(p),uip_ipaddr4(p)
+
+/*
+ * This is how we force inclusion of the psock library and the button
+ * device driver.
+ */
+#include "net/psock.h"
+void *force_psock_inclusion = &psock_init;
+void *force_button_inclusion = &button_init;
+
+void uip_log(char *msg) { puts(msg); }
+
+/* We have two IP interfaces. */
+struct uip_fw_netif cc2420if =
+{UIP_FW_NETIF(172,16,0,1, 255,255,0,0, cc2420_send_uaodv)};
+
+static struct uip_fw_netif slipif =
+{UIP_FW_NETIF(0,0,0,0, 255,255,255,255, slip_send)};
+
+/* Radio stuff in network byte order. */
+static u16_t panId = HTONS(0x2024);
+
+#define RF_CHANNEL              26
+
+int
+main(int argc, char **argv)
+{
+  /*
+   * Initalize hardware.
+   */
+  msp430_cpu_init();
+  clock_init();
+  leds_init();
+  leds_toggle(LEDS_RED | LEDS_GREEN | LEDS_BLUE);
+  slip_arch_init();		/* Must come before first printf */
+  printf("Starting %s "
+	 "($Id: gateway.c,v 1.1 2006/08/02 14:44:46 bg- Exp $)\n", __FILE__);
+  ds2411_init();
+  sensors_light_init();
+  cc2420_init();
+  xmem_init();
+  leds_toggle(LEDS_RED | LEDS_GREEN | LEDS_BLUE);
+  /*
+   * Hardware initialization done!
+   */
+  
+  printf("MAC %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
+	 ds2411_id[0], ds2411_id[1], ds2411_id[2], ds2411_id[3],
+	 ds2411_id[4], ds2411_id[5], ds2411_id[6], ds2411_id[7]);
+
+  uip_ipaddr_copy(&uip_hostaddr, &cc2420if.ipaddr);
+  uip_ipaddr_copy(&uip_netmask, &cc2420if.netmask);
+  printf("IP %d.%d.%d.%d netmask %d.%d.%d.%d\n",
+	 ip2quad(&uip_hostaddr), ip2quad(&uip_netmask));
+  cc2420_set_chan_pan_addr(RF_CHANNEL, panId, uip_hostaddr[1], ds2411_id);
+
+  /*
+   * Initialize Contiki and our processes.
+   */
+  process_init();
+  process_start(&etimer_process, NULL);
+
+  /* Configure IP stack. */
+  uip_init();
+  uip_fw_default(&slipif);	/* Point2point, no default router. */
+  uip_fw_register(&cc2420if);
+  tcpip_set_forwarding(1);
+  
+  /* Start IP stack. */
+  process_start(&tcpip_process, NULL);
+  process_start(&uip_fw_process, NULL);	/* Start IP output */
+  process_start(&slip_process, NULL);
+  process_start(&cc2420_process, NULL);
+  cc2420_on();
+  process_start(&uaodv_process, NULL);
+
+  process_start(&tcp_loader_process, NULL);
+
+  /*
+   * This is the scheduler loop.
+   */
+  printf("process_run()...\n");
+  lpm_on();
+  while (1) {
+    do {
+      /* Reset watchdog. */
+    } while(process_run() > 0);
+    /* Idle processing. */
+    LPM_SLEEP();
+  }
+
+  return 0;
+}
diff --git a/platform/sky/loadable_prg.c b/platform/sky/loadable_prg.c
new file mode 100644
index 000000000..5c4641a47
--- /dev/null
+++ b/platform/sky/loadable_prg.c
@@ -0,0 +1,82 @@
+/*
+ * 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: loadable_prg.c,v 1.1 2006/08/02 14:44:46 bg- Exp $
+ */
+
+#include <stdio.h>
+
+#include "contiki.h"
+
+#include "dev/leds.h"
+
+PROCESS(test_process, "Test process");
+
+PROCESS_THREAD(test_process, ev, data)
+{
+  static struct etimer etimer;
+
+  PROCESS_EXITHANDLER(goto exit);
+  PROCESS_BEGIN();
+
+  printf("test_process starting\n");
+
+  while(1) {
+    leds_on(LEDS_RED);
+    etimer_set(&etimer, CLOCK_SECOND);
+    PROCESS_WAIT_UNTIL(etimer_expired(&etimer));
+    leds_off(LEDS_RED);
+    etimer_set(&etimer, CLOCK_SECOND);
+    PROCESS_WAIT_UNTIL(etimer_expired(&etimer));
+  }
+
+ exit:
+  printf("test_process exiting\n");
+  leds_off(LEDS_RED);
+  PROCESS_END();
+}
+
+/*
+ * Initialize this kernel module.
+ */
+void
+_init(void)
+{
+  process_start(&test_process, NULL);
+}
+
+/*
+ * When this module is unloaded we must clean up!
+ */
+void
+_fini(void)
+{
+  process_exit(&test_process);
+}
diff --git a/platform/sky/udprecv.c b/platform/sky/udprecv.c
new file mode 100644
index 000000000..5cac1d91c
--- /dev/null
+++ b/platform/sky/udprecv.c
@@ -0,0 +1,91 @@
+/*
+ * 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: udprecv.c,v 1.1 2006/08/02 14:44:46 bg- Exp $
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include "contiki.h"
+#include "net/uip.h"
+
+PROCESS(udprecv_process, "UDP recv process");
+
+PROCESS_THREAD(udprecv_process, ev, data)
+{
+  static struct uip_udp_conn *c;
+
+  PROCESS_EXITHANDLER(goto exit);
+  PROCESS_BEGIN();
+
+  printf("udprecv_process starting\n");
+
+  {
+    uip_ipaddr_t any;
+    uip_ipaddr(&any, 0,0,0,0);
+    c = udp_new(any, HTONS(0), NULL);
+    uip_udp_bind(c, HTONS(4321));
+  }
+  
+  while(1) {
+    PROCESS_YIELD();
+
+    if(ev == tcpip_event && uip_newdata()) {
+      u8_t *src = (u8_t *)((struct uip_udpip_hdr *)uip_buf)->srcipaddr;
+      printf("%d.%d.%d.%d: %s\n",
+	     src[0], src[1], src[2], src[3], (char *)uip_appdata);
+    }
+  }
+
+ exit:
+  /* Contiki does automatic garbage collection of uIP state and we
+   * need not worry about that. */
+  printf("udprecv_process exiting\n");
+  PROCESS_END();
+}
+
+/*
+ * Initialize this kernel module.
+ */
+void
+_init(void)
+{
+  process_start(&udprecv_process, NULL);
+}
+
+/*
+ * When this module is unloaded we must clean up!
+ */
+void
+_fini(void)
+{
+  process_exit(&udprecv_process);
+}
diff --git a/platform/sky/udpsend.c b/platform/sky/udpsend.c
new file mode 100644
index 000000000..94efef12f
--- /dev/null
+++ b/platform/sky/udpsend.c
@@ -0,0 +1,102 @@
+/*
+ * 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: udpsend.c,v 1.1 2006/08/02 14:44:46 bg- Exp $
+ */
+
+/* Set the IP destination address to something different from the
+ * broadcast address. Use commas (",") rather than the normal dots
+ * (".") in addresses.
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include "contiki.h"
+#include "net/uip.h"
+
+#include "dev/leds.h"
+#include "dev/light.h"
+
+PROCESS(udpsend_process, "UDP send process");
+
+PROCESS_THREAD(udpsend_process, ev, data)
+{
+  static struct etimer etimer;
+  static struct uip_udp_conn *c;
+
+  PROCESS_EXITHANDLER(goto exit);
+  PROCESS_BEGIN();
+
+  printf("udpsend_process starting\n");
+
+  {
+    uip_ipaddr_t addr;
+    uip_ipaddr(&addr, 255,255,255,255); /* Change address here! */
+    c = udp_new(addr, HTONS(4321), NULL);
+    c->ttl = 1;			/* One hop only. */
+  }
+
+  while(1) {
+    etimer_set(&etimer, CLOCK_SECOND);
+    PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&etimer));
+
+    tcpip_poll_udp(c);
+    PROCESS_WAIT_EVENT_UNTIL(ev == tcpip_event);
+
+    char buf[64];
+    sprintf(buf, "light sensors %d %d", sensors_light1(), sensors_light2());
+    uip_send(buf, strlen(buf) + 1);
+  }
+
+ exit:
+  /* Contiki does automatic garbage collection of uIP state and we
+   * need not worry about that. */
+  printf("udpsend_process exiting\n");
+  PROCESS_END();
+}
+
+/*
+ * Initialize this kernel module.
+ */
+void
+_init(void)
+{
+  process_start(&udpsend_process, NULL);
+}
+
+/*
+ * When this module is unloaded we must clean up!
+ */
+void
+_fini(void)
+{
+  process_exit(&udpsend_process);
+}