added support for pic32 (PIC32MX795F512L)

2012-12-17 09:14:23 +01:00 · 2012-12-17 09:14:23 +01:00 · f68df3a81c
commit f68df3a81c
parent 70e46f3248
21 changed files with 2414 additions and 0 deletions
--- a/cpu/pic32/clock.c
+++ b/cpu/pic32/clock.c
@ -0,0 +1,144 @@
+/*
+ * Contiki PIC32 Port project
+ * 
+ * Copyright (c) 2012,
+ *  Scuola Superiore Sant'Anna (http://www.sssup.it) and
+ *  Consorzio Nazionale Interuniversitario per le Telecomunicazioni
+ *  (http://www.cnit.it).
+ *
+ * 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 pic32 PIC32 Contiki Port
+ *
+ * @{
+ */
+
+/**
+ * \file   clock.c
+ * \brief  Clock routines.
+ * \author Giovanni Pellerano <giovanni.pellerano@evilaliv3.org>
+ * \author Daniele Alessandrelli <d.alessandrelli@sssup.it>
+ * \date   2012-03-21
+ */
+
+#include <pic32_clock.h>
+#include <pic32_timer.h>
+#include <pic32_irq.h>
+
+#include <sys/clock.h>
+#include <sys/etimer.h>
+
+#include "contiki.h"
+
+static volatile clock_time_t ticks;
+static volatile unsigned long seconds;
+
+/*---------------------------------------------------------------------------*/
+static inline void
+clock_callback(void)
+{
+  ++ticks;
+
+  if(etimer_pending()) {
+ 	  etimer_request_poll();
+  }
+
+#if (CLOCK_CONF_SECOND & (CLOCK_CONF_SECOND - 1)) != 0
+#error CLOCK_CONF_SECOND must be a power of two (i.e., 1, 2, 4, 8, 16, 32, 64, ...).
+#error Change CLOCK_CONF_SECOND in contiki-conf.h.
+#endif
+
+  if((ticks % CLOCK_SECOND) == 0) {
+    ++seconds;
+  }
+}
+/*---------------------------------------------------------------------------*/
+clock_time_t
+clock_time(void)
+{
+  return ticks;
+}
+/*---------------------------------------------------------------------------*/
+unsigned long
+clock_seconds(void)
+{
+  return seconds;
+}
+/*---------------------------------------------------------------------------*/
+void
+clock_set_seconds(unsigned long sec)
+{
+  seconds = sec;
+}
+/*---------------------------------------------------------------------------*/
+void
+clock_init(void)
+{
+  ticks = 0;
+  seconds = 0;
+  pic32_timer1_init(CLOCK_SECOND);
+  pic32_timer1_enable_irq();
+  pic32_timer1_start();
+}
+/*---------------------------------------------------------------------------*/
+void
+clock_delay_usec(uint16_t dt)
+{
+  uint32_t now;
+  uint32_t stop;
+
+  asm volatile("mfc0   %0, $9" : "=r"(now));
+  
+  /* The Count register is incremented every two system clock (SYSCLK) cycles. */
+
+  stop = now + dt * ((pic32_clock_get_system_clock() / 1000000) / 2);
+
+  for (;;) {
+    asm volatile("mfc0   %0, $9" : "=r"(now));
+    if ((int32_t) (now - stop) >= 0) {
+      break;
+    }
+  }
+}
+/*---------------------------------------------------------------------------*/
+/*
+ * Deprecated platform-specific routines.
+ *
+ */
+inline void
+clock_delay(unsigned int delay)
+{
+  clock_delay_usec(delay);
+}
+/*---------------------------------------------------------------------------*/
+
+TIMER_INTERRUPT(1, clock_callback);
+
+/** @} */