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Made stack printout on reboot configurable.

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Added the ability to turn on watchdog multiple times - the watchdog
registers are touched only when the watchdog goes from off to on state
to avoid retriggering the watchdog when it shouldn't.
This commit is contained in:
adamdunkels 2010-09-22 22:12:37 +00:00
parent 0261af4af2
commit 7c14899eeb
1 changed files with 19 additions and 15 deletions
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32
cpu/msp430/watchdog.c
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@ -28,13 +28,16 @@
* *
* This file is part of the Contiki operating system. * This file is part of the Contiki operating system.
* *
* @(#)$Id: watchdog.c,v 1.9 2010/08/24 16:23:20 joxe Exp $ * @(#)$Id: watchdog.c,v 1.10 2010/09/22 22:12:37 adamdunkels Exp $
*/ */
#include <io.h> #include <io.h>
#include <signal.h> #include <signal.h>
#include "dev/watchdog.h" #include "dev/watchdog.h"
static int stopped = 0; static int counter = 0;
#define PRINT_STACK_ON_REBOOT 1
/*---------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/
#ifdef CONTIKI_TARGET_SKY #ifdef CONTIKI_TARGET_SKY
static void static void
@ -69,15 +72,13 @@ interrupt(WDT_VECTOR)
watchdog_interrupt(void) watchdog_interrupt(void)
{ {
#ifdef CONTIKI_TARGET_SKY #ifdef CONTIKI_TARGET_SKY
#if PRINT_STACK_ON_REBOOT
uint8_t dummy; uint8_t dummy;
static uint8_t *ptr; static uint8_t *ptr;
static int i; static int i;
ptr = &dummy; ptr = &dummy;
printstring("Watchdog reset"); printstring("Watchdog reset");
/* printstring("Watchdog reset at PC $");
hexprint(ptr[3]);
hexprint(ptr[2]);*/
printstring("\nStack at $"); printstring("\nStack at $");
hexprint(((int)ptr) >> 8); hexprint(((int)ptr) >> 8);
hexprint(((int)ptr) & 0xff); hexprint(((int)ptr) & 0xff);
@ -91,7 +92,8 @@ watchdog_interrupt(void)
} }
} }
printchar('\n'); printchar('\n');
#endif #endif /* PRINT_STACK_ON_REBOOT */
#endif /* CONTIKI_TARGET_SKY */
watchdog_reboot(); watchdog_reboot();
} }
@ -101,7 +103,7 @@ watchdog_init(void)
{ {
/* The MSP430 watchdog is enabled at boot-up, so we stop it during /* The MSP430 watchdog is enabled at boot-up, so we stop it during
initialization. */ initialization. */
stopped = 0; counter = 0;
watchdog_stop(); watchdog_stop();
IFG1 &= ~WDTIFG; IFG1 &= ~WDTIFG;
@ -113,8 +115,8 @@ watchdog_start(void)
{ {
/* We setup the watchdog to reset the device after one second, /* We setup the watchdog to reset the device after one second,
unless watchdog_periodic() is called. */ unless watchdog_periodic() is called. */
stopped--; counter--;
if(!stopped) { if(counter == 0) {
WDTCTL = WDTPW | WDTCNTCL | WDT_ARST_1000 | WDTTMSEL; WDTCTL = WDTPW | WDTCNTCL | WDT_ARST_1000 | WDTTMSEL;
} }
} }
@ -124,16 +126,18 @@ watchdog_periodic(void)
{ {
/* This function is called periodically to restart the watchdog /* This function is called periodically to restart the watchdog
timer. */ timer. */
if(!stopped) { /* if(counter < 0) {*/
WDTCTL = (WDTCTL & 0xff) | WDTPW | WDTCNTCL | WDTTMSEL;; WDTCTL = (WDTCTL & 0xff) | WDTPW | WDTCNTCL | WDTTMSEL;
} /* }*/
} }
/*---------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/
void void
watchdog_stop(void) watchdog_stop(void)
{ {
WDTCTL = WDTPW | WDTHOLD; counter++;
stopped++; if(counter == 1) {
WDTCTL = WDTPW | WDTHOLD;
}
} }
/*---------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------*/
void void