/*
  IRQ
  Taster schaltet mittels Interrupt die LED um (toggle)
  
*/

volatile bool ledstatus = LOW;

void setup() {
  pinMode(13, OUTPUT);
  pinMode(2, INPUT_PULLUP);

  attachInterrupt(digitalPinToInterrupt(2),LEDtoggle,FALLING);

}

void LEDtoggle()
{
  ledstatus = !ledstatus;
}


void loop() {
  digitalWrite(13, ledstatus);
}