150 lines
4.3 KiB
C
150 lines
4.3 KiB
C
/*
|
|
* Copyright (c) 2005, 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.
|
|
*
|
|
*/
|
|
|
|
#include "contiki-conf.h"
|
|
#include "dev/watchdog.h"
|
|
#include "isr_compat.h"
|
|
|
|
static int counter = 0;
|
|
|
|
#define PRINT_STACK_ON_REBOOT 0
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
#if PRINT_STACK_ON_REBOOT
|
|
#ifdef CONTIKI_TARGET_SKY
|
|
static void
|
|
printchar(char c)
|
|
{
|
|
/* Transmit the data. */
|
|
TXBUF1 = c;
|
|
|
|
/* Loop until the transmission buffer is available. */
|
|
while((SFRIFG2 & UTXIFG1) == 0);
|
|
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
hexprint(uint8_t v)
|
|
{
|
|
const char hexconv[] = "0123456789abcdef";
|
|
printchar(hexconv[v >> 4]);
|
|
printchar(hexconv[v & 0x0f]);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
printstring(char *s)
|
|
{
|
|
while(*s) {
|
|
printchar(*s++);
|
|
}
|
|
}
|
|
#endif /* CONTIKI_TARGET_SKY */
|
|
#endif /* PRINT_STACK_ON_REBOOT */
|
|
/*---------------------------------------------------------------------------*/
|
|
ISR(WDT, watchdog_interrupt)
|
|
{
|
|
#ifdef CONTIKI_TARGET_SKY
|
|
#if PRINT_STACK_ON_REBOOT
|
|
uint8_t dummy;
|
|
static uint8_t *ptr;
|
|
static int i;
|
|
|
|
ptr = &dummy;
|
|
printstring("Watchdog reset");
|
|
printstring("\nStack at $");
|
|
hexprint(((int)ptr) >> 8);
|
|
hexprint(((int)ptr) & 0xff);
|
|
printstring(":\n");
|
|
|
|
for(i = 0; i < 64; ++i) {
|
|
hexprint(ptr[i]);
|
|
printchar(' ');
|
|
if((i & 0x0f) == 0x0f) {
|
|
printchar('\n');
|
|
}
|
|
}
|
|
printchar('\n');
|
|
#endif /* PRINT_STACK_ON_REBOOT */
|
|
#endif /* CONTIKI_TARGET_SKY */
|
|
|
|
watchdog_reboot();
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
watchdog_init(void)
|
|
{
|
|
/* The MSP430 watchdog is enabled at boot-up, so we stop it during
|
|
initialization. */
|
|
counter = 0;
|
|
watchdog_stop();
|
|
|
|
SFRIFG1 &= ~WDTIFG;
|
|
SFRIE1 |= WDTIE;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
watchdog_start(void)
|
|
{
|
|
/* We setup the watchdog to reset the device after one second,
|
|
unless watchdog_periodic() is called. */
|
|
counter--;
|
|
if(counter == 0) {
|
|
WDTCTL = WDTPW | WDTCNTCL | WDT_ARST_1000 | WDTTMSEL;
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
watchdog_periodic(void)
|
|
{
|
|
/* This function is called periodically to restart the watchdog
|
|
timer. */
|
|
/* if(counter < 0) {*/
|
|
WDTCTL = (WDTCTL & 0xff) | WDTPW | WDTCNTCL | WDTTMSEL;
|
|
/* }*/
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
watchdog_stop(void)
|
|
{
|
|
counter++;
|
|
if(counter == 1) {
|
|
WDTCTL = WDTPW | WDTHOLD;
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
watchdog_reboot(void)
|
|
{
|
|
WDTCTL = 0;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|