Reincarnate the sensinode/cc2430 port

2012-03-05 16:28:06 +00:00 · 2012-03-05 16:28:06 +00:00 · b7674c3636
commit b7674c3636
parent c78b5bad5c
114 changed files with 10044 additions and 3068 deletions
--- a/cpu/cc2430/rtimer-arch.c
+++ b/cpu/cc2430/rtimer-arch.c
@ -0,0 +1,122 @@
+/*
+ * Copyright (c) 2010, Loughborough University - 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
+ *         Hardware-dependent functions used to support the
+ *         contiki rtimer module.
+ *
+ *         clock and etimer are using the sleep timer on the cc2430
+ *
+ *         clock_init() has set our tick speed prescaler already, so we
+ *         are ticking with 500 kHz freq.
+ *
+ *         rtimer_clock_t is unsigned short (16bit on the cc2430)
+ *         It thus makes sense to use the 16bit clock (Timer 1)
+ *
+ *         This file contains an ISR and must reside in the HOME bank
+ *
+ * \author
+ *         George Oikonomou - <oikonomou@users.sourceforge.net>
+ */
+
+#include "sys/rtimer.h" /* Includes rtimer-arch.h for us */
+#include "cc2430_sfr.h"
+#include "sys/energest.h"
+
+#define DEBUG 0
+#if DEBUG
+#include <stdio.h>
+#define PRINTF(...) printf(__VA_ARGS__)
+#else
+#define PRINTF(...)
+#endif
+
+/*---------------------------------------------------------------------------*/
+void
+rtimer_arch_init(void)
+{
+  PRINTF("rtimer_arch_init() ");
+  /*
+   * - Free running mode
+   * - Prescale by 32:
+   *   Tick Speed has been prescaled to 500 kHz already in clock_init()
+   *   We further prescale by 32 resulting in 15625 Hz for this timer.
+   */
+  T1CTL = (T1DIV1 | T1MODE0); /* 00001001 */
+  PRINTF("T1CTL=0x%02x\n", T1CTL);
+  /* Acknowledge Timer 1 Interrupts */
+  IEN1_T1IE = 1;
+  PRINTF("IEN1_T1IE=0x%02x\n", IEN1_T1IE);
+
+  /* Timer 1, Channel 1. Compare Mode (0x04), Interrupt mask on (0x40) */
+  T1CCTL1 = T1MODE + T1IM;
+  PRINTF("T1CCTL1=0x%02x\n", T1CCTL1);
+
+  /* Interrupt Mask Flags: No interrupt on overflow */
+  TIMIF &= ~OVFIM;
+  PRINTF("TIMIF=0x%02x\n", TIMIF);
+
+  PRINTF("done\n");
+}
+/*---------------------------------------------------------------------------*/
+void
+rtimer_arch_schedule(rtimer_clock_t t)
+{
+  PRINTF("rtimer_arch_schedule(%u)\n", t);
+
+  /* set the compare mode values so we can get an interrupt after t */
+  T1CC1L = (unsigned char) t;
+  T1CC1H = (unsigned char) (t >> 8);
+  PRINTF("T1CC1=%u, t=%u\n", (T1CC1L + (T1CC1H << 8)), t);
+
+  /* Turn on compare mode interrupt */
+  PRINTF("T1CTL=0x%02x\n", T1CTL);
+  T1CCTL1 |= T1IM;
+}
+/*---------------------------------------------------------------------------*/
+void
+cc2430_timer_1_ISR(void) __interrupt (T1_VECTOR)
+{
+  IEN1_T1IE = 0; /* Ignore Timer 1 Interrupts */
+  ENERGEST_ON(ENERGEST_TYPE_IRQ);
+  /* No more interrupts from Channel 1 till next rtimer_arch_schedule() call.
+   * Setting the mask will instantly generate an interrupt so we clear the
+   * flag first. */
+  T1CTL &= ~(CH1IF);
+  T1CCTL1 &= ~T1IM;
+
+  rtimer_run_next();
+
+  ENERGEST_OFF(ENERGEST_TYPE_IRQ);
+  IEN1_T1IE = 1; /* Acknowledge Timer 1 Interrupts */
+}