/*
  Button

  Turns on and off a light emitting diode(LED) connected to digital pin PA7,
  when pressing a pushbutton attached to pin PA3.

  The circuit:
  - ATtiny44
  - LED attached from pin 6 to ground
  - pushbutton attached to pin 10 from +5V
  - 10K resistor attached to pin 10 from ground

  created 2005
  by DojoDave <http://www.0j0.org>
  modified 30 Aug 2011
  by Tom Igoe
  modified 9 March 2021
  by Jonathan León


  This example code is in the public domain.

  http://www.arduino.cc/en/Tutorial/Button
*/

// constants won't change. They're used here to set pin numbers:
const int buttonPin = PA3;     // the number of the pushbutton pin. INPUT
const int ledPin =  PA7;      // the number of the LED pin. OUTPUT

// variables will change:
int buttonState = 0;         // variable for reading the pushbutton status

void setup() {
  // initialize the LED pin as an output:
  pinMode(ledPin, OUTPUT);
  // initialize the pushbutton pin as an input:
  pinMode(buttonPin, INPUT);
}

void loop() {
  // read the state of the pushbutton value:
  buttonState = digitalRead(buttonPin);

  // check if the pushbutton is pressed. If it is, the buttonState is HIGH:
  if (buttonState == HIGH) {
    // turn LED on:
    digitalWrite(ledPin, HIGH);
  } else {
    // turn LED off:
    digitalWrite(ledPin, LOW);
  }
}