// Para usar la versión 2.x.x en diagram.json
//  "attrs": {"builder": "esp32-core-2.0.3"}
//#include <M5Core2.h>
#define LED_PIN 14

hw_timer_t *timerLed = NULL;

void IRAM_ATTR changeState()
{
  //Invert current state of the LED
  digitalWrite(LED_PIN, !(digitalRead(LED_PIN)));
}


void setup() {
  //M5.begin();
  //Select LED_PIN mode
  pinMode(LED_PIN, OUTPUT);
  timerLed = timerBegin(0, 80, true);  // use tiemr 0 and set prescale to 80 so 1 tick is 1 uSec
  timerAttachInterrupt(timerLed, &changeState, true); // point to the ISR
  timerAlarmWrite(timerLed, 1000000, true);  // set alarm every 1 sec
  timerAlarmEnable(timerLed);  // enable the alarm

}

void loop() {
}