digitalPinToInterrupt()
Converts Z-Uno pin number to interrupt index. digitalPinToInterrupt(pin)pin: Z-Uno pin number. Look at the pinout page for more details. interrupt index
const byte ledPin = 13;
const byte interruptPin = 2;
volatile byte state = LOW;
void setup() {
pinMode(ledPin, OUTPUT);
pinMode(interruptPin, INPUT_PULLUP);
attachInterrupt(digitalPinToInterrupt(interruptPin), blink, CHANGE);
}
void loop() {
digitalWrite(ledPin, state);
}
void blink() {
state = !state;
}