tinkercat pin change interrupt

3 buttons to blink, turn on and off 2nd led, while 1st led flashes

int buttonState = 1;

volatile byte lightState = LOW;

void setup()

{

  pinMode(5, INPUT);

  pinMode(6, INPUT);

  pinMode(7, INPUT);

  pinMode(9, OUTPUT);

  pinMode(10, OUTPUT);

  

  PCICR |= B00000100; //enable PCMSK2 (group 2: PCINT16 to PCINT23)

  PCMSK2 |= B11100000; //D5, D6 and D7 could trigger interrupt

}

ISR (PCINT2_vect){

  if(digitalRead(5) ){

    buttonState = 1;

  }

  

  if(digitalRead(6) ){

    buttonState = 2;

  }

     

  if(digitalRead(7) ){

  buttonState = 3;

  }

}

void loop()

{

  digitalWrite(10, HIGH);

  delay(500);

  

  interruptLed();

  

  digitalWrite(10, LOW);

  delay(500);

  interruptLed();

}

void interruptLed(){

  switch(buttonState){

    case 1:

    lightState = !lightState;

    digitalWrite(9, lightState);

    break;

    case 2:

    digitalWrite(9, HIGH);

    break;

    case 3:

    digitalWrite(9, LOW);

    break;

    default:

    buttonState = 1;

    break;

  }

}

reference:

https://www.youtube.com/watch?v=ZDtRWmBMCmw

https://www.youtube.com/watch?v=7aAJMvSNpEA&list=PLKL6KBeCnI3X7cb1sznYuyScUesOxS-kL&index=10

PCICR

PCMSK