nes-proj/cpu/mc1322x/rtimer-arch.c
2011-09-02 12:36:10 -04:00

99 lines
2.8 KiB
C

/*
* Copyright (c) 2010, Mariano Alvira <mar@devl.org> and other contributors
* to the MC1322x project (http://mc1322x.devl.org) and Contiki.
*
* 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 OS.
*
*
*/
/**
* \file
* mc1322x-specific rtimer code
* \author
* Mariano Alvira <mar@devl.org>
*/
#include <signal.h>
/* contiki */
#include "sys/energest.h"
#include "sys/rtimer.h"
/* mc1322x */
#include "utils.h"
#define DEBUG 0
#if DEBUG
#include <stdio.h>
#define PRINTF(...) printf(__VA_ARGS__)
#else
#define PRINTF(...)
#endif
void rtc_isr(void) {
PRINTF("rtc_wu_irq\n\r");
PRINTF("now is %u\n", rtimer_arch_now());
disable_rtc_wu();
disable_rtc_wu_irq();
rtimer_run_next();
clear_rtc_wu_evt();
}
void
rtimer_arch_init(void)
{
}
void
rtimer_arch_schedule(rtimer_clock_t t)
{
volatile uint32_t now;
now = rtimer_arch_now();
PRINTF("rtimer_arch_schedule time %u; now is %u\n", t,now);
#if 1
/* If specified time is always in the future, counter can wrap without harm */
*CRM_RTC_TIMEOUT = t - now;
#else
/* Immediate interrupt if specified time is before current time. This may also
happen on counter overflow. */
if(now>t) {
*CRM_RTC_TIMEOUT = 1;
} else {
*CRM_RTC_TIMEOUT = t - now;
}
#endif
clear_rtc_wu_evt();
enable_rtc_wu();
enable_rtc_wu_irq();
PRINTF("rtimer_arch_schedule CRM_RTC_TIMEOUT is %u\n", *CRM_RTC_TIMEOUT);
}