cpu/mc1322x/rtimer-arch.c

   1 /*
   2  * Copyright (c) 2010, Mariano Alvira <mar@devl.org> and other contributors
   3  * to the MC1322x project (http://mc1322x.devl.org) and Contiki.
   4  *
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the Institute nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  * This file is part of the Contiki OS.
  32  *
  33  * $Id: rtimer-arch.c,v 1.1 2010/06/09 14:43:22 maralvira Exp $
  34  */
  35
  36 /**
  37  * \file
  38  *         mc1322x-specific rtimer code
  39  * \author
  40  *         Mariano Alvira <mar@devl.org>
  41  */
  42
  43 #include <signal.h>
  44
  45 /* contiki */
  46 #include "sys/energest.h"
  47 #include "sys/rtimer.h"
  48
  49 /* mc1322x */
  50 #include "utils.h"
  51
  52 #define DEBUG 0
  53 #if DEBUG
  54 #include <stdio.h>
  55 #define PRINTF(...) printf(__VA_ARGS__)
  56 #else
  57 #define PRINTF(...)
  58 #endif
  59
  60 void rtc_isr(void) {
  61         PRINTF("rtc_wu_irq\n\r");
  62         PRINTF("now is %u\n", rtimer_arch_now());
  63         disable_rtc_wu();
  64         disable_rtc_wu_irq();
  65         rtimer_run_next();
  66         clear_rtc_wu_evt();
  67 }
  68
  69 void
  70 rtimer_arch_init(void)
  71 {
  72 }
  73
  74 void
  75 rtimer_arch_schedule(rtimer_clock_t t)
  76 {
  77         volatile uint32_t now;
  78         now = rtimer_arch_now();
  79         PRINTF("rtimer_arch_schedule time %u; now is %u\n", t,now);
  80         if(now>t) {
  81                 *CRM_RTC_TIMEOUT = 1;
  82         } else {
  83                 *CRM_RTC_TIMEOUT = t - now;
  84         }
  85
  86         clear_rtc_wu_evt();
  87         enable_rtc_wu();
  88         enable_rtc_wu_irq();
  89         PRINTF("rtimer_arch_schedule CRM_RTC_TIMEOUT is %u\n", *CRM_RTC_TIMEOUT);
  90 }