40 lines
1.1 KiB
Arduino
40 lines
1.1 KiB
Arduino
|
#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_noos();
|
||
|
|
}
|
||
|
|
|
||
|
|
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
|
||
|
|
}
|