104 lines
3 KiB
C
104 lines
3 KiB
C
/*
|
|
* Copyright (c) 2007, Swedish Institute of 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.
|
|
*
|
|
* $Id: rtimer-arch.c,v 1.17 2010/11/27 15:27:20 nifi Exp $
|
|
*/
|
|
|
|
/**
|
|
* \file
|
|
* MSP430-specific rtimer code
|
|
* \author
|
|
* Adam Dunkels <adam@sics.se>
|
|
*/
|
|
|
|
#include <io.h>
|
|
#include <signal.h>
|
|
|
|
#include "sys/energest.h"
|
|
#include "sys/rtimer.h"
|
|
#include "sys/process.h"
|
|
#include "dev/watchdog.h"
|
|
|
|
#define DEBUG 0
|
|
#if DEBUG
|
|
#include <stdio.h>
|
|
#define PRINTF(...) printf(__VA_ARGS__)
|
|
#else
|
|
#define PRINTF(...)
|
|
#endif
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
interrupt(TIMERA0_VECTOR) timera0 (void) {
|
|
ENERGEST_ON(ENERGEST_TYPE_IRQ);
|
|
|
|
watchdog_start();
|
|
|
|
rtimer_run_next();
|
|
|
|
if(process_nevents() > 0) {
|
|
LPM4_EXIT;
|
|
}
|
|
|
|
watchdog_stop();
|
|
|
|
ENERGEST_OFF(ENERGEST_TYPE_IRQ);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
rtimer_arch_init(void)
|
|
{
|
|
dint();
|
|
|
|
/* CCR0 interrupt enabled, interrupt occurs when timer equals CCR0. */
|
|
TACCTL0 = CCIE;
|
|
|
|
/* Enable interrupts. */
|
|
eint();
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
rtimer_clock_t
|
|
rtimer_arch_now(void)
|
|
{
|
|
rtimer_clock_t t1, t2;
|
|
do {
|
|
t1 = TAR;
|
|
t2 = TAR;
|
|
} while(t1 != t2);
|
|
return t1;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
rtimer_arch_schedule(rtimer_clock_t t)
|
|
{
|
|
PRINTF("rtimer_arch_schedule time %u\n", t);
|
|
|
|
TACCR0 = t;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|