28 lines
447 B
C
28 lines
447 B
C
#include "watchdog.h"
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#include <avr/wdt.h>
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#include <avr/interrupt.h>
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#include "arduino.h"
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volatile uint8_t wd_flag = 0;
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ISR(WDT_vect) {
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// watchdog has tripped- no main loop activity for 0.25s, probably a bad thing
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wd_flag |= 1;
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}
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void wd_init() {
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// 0.25s timeout, interrupt and system reset
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wdt_enable(WDTO_250MS);
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WDTCSR |= MASK(WDIE);
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}
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void wd_reset() {
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wdt_reset();
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if (wd_flag) {
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WDTCSR |= MASK(WDIE);
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wd_flag &= ~1;
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}
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}
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