Hi David ,
I think that in the embedded world , its a good thing to have a watchdog.
Do you think it’s usefull for the esp32 ?
I found an example for the esp32. Maybe you could implement it in ulisp ?
I was thinking of (watchdog-enable) , (watchdog-timeout ‘milliseconds’) , (watchdog-reset)
Below is the example.
Kind regards ,
Ronny Suy
#include "esp_system.h"
const int button = 0; //gpio to use to trigger delay
const int wdtTimeout = 3000; //time in ms to trigger the watchdog
hw_timer_t *timer = NULL;
void IRAM_ATTR resetModule() {
ets_printf("reboot\n");
esp_restart();
}
void setup() {
Serial.begin(115200);
Serial.println();
Serial.println("running setup");
pinMode(button, INPUT_PULLUP); //init control pin
timer = timerBegin(0, 80, true); //timer 0, div 80
timerAttachInterrupt(timer, &resetModule, true); //attach callback
timerAlarmWrite(timer, wdtTimeout * 1000, false); //set time in us
timerAlarmEnable(timer); //enable interrupt
}
void loop() {
Serial.println("running main loop");
timerWrite(timer, 0); //reset timer (feed watchdog)
long loopTime = millis();
//while button is pressed, delay up to 3 seconds to trigger the timer
while (!digitalRead(button)) {
Serial.println("button pressed");
delay(500);
}
delay(1000); //simulate work
loopTime = millis() - loopTime;
Serial.print("loop time is = ");
Serial.println(loopTime); //should be under 3000
}