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105 lines
3.0 KiB
C
105 lines
3.0 KiB
C
/*
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* Copyright (c) 2007, Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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* $Id: rtimer-arch.c,v 1.17 2010/11/27 15:27:20 nifi Exp $
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*/
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/**
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* \file
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* MSP430-specific rtimer code
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* \author
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* Adam Dunkels <adam@sics.se>
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*/
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#include <io.h>
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#include <signal.h>
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#include "sys/energest.h"
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#include "sys/rtimer.h"
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#include "sys/process.h"
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#include "dev/watchdog.h"
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#define DEBUG 0
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#if DEBUG
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#include <stdio.h>
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#define PRINTF(...) printf(__VA_ARGS__)
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#else
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#define PRINTF(...)
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#endif
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/*---------------------------------------------------------------------------*/
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interrupt(TIMERA0_VECTOR) timera0 (void) {
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ENERGEST_ON(ENERGEST_TYPE_IRQ);
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watchdog_start();
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rtimer_run_next();
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if(process_nevents() > 0) {
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LPM4_EXIT;
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}
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watchdog_stop();
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ENERGEST_OFF(ENERGEST_TYPE_IRQ);
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}
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/*---------------------------------------------------------------------------*/
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void
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rtimer_arch_init(void)
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{
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dint();
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/* CCR0 interrupt enabled, interrupt occurs when timer equals CCR0. */
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TACCTL0 = CCIE;
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/* Enable interrupts. */
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eint();
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}
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/*---------------------------------------------------------------------------*/
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rtimer_clock_t
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rtimer_arch_now(void)
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{
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rtimer_clock_t t1, t2;
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do {
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t1 = TAR;
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t2 = TAR;
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} while(t1 != t2);
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return t1;
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}
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/*---------------------------------------------------------------------------*/
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void
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rtimer_arch_schedule(rtimer_clock_t t)
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{
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PRINTF("rtimer_arch_schedule time %u\n", t);
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TACCR0 = t;
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}
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/*---------------------------------------------------------------------------*/
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