/**
   Mini 3-Button Piano for Arduino.

   You can control the 3 buttons with your keyboard:
   After starting the simulation, click anywhere in the diagram to focus it.
   Then press any key between 1 and 3 to play the piano (1 is the lowest note,
   3 is the highest).

   Copyright (C) 2023, [Your Name].
   Released under the MIT License.
*/

#include "pitches.h"

#define SPEAKER_PIN 8

const uint8_t buttonPins[] = { 4, 5, 6 };
const int buttonTones[] = {
  NOTE_C4, NOTE_E4, NOTE_G4
};
const int numTones = sizeof(buttonPins) / sizeof(buttonPins[0]);

void setup() {
  for (uint8_t i = 0; i < numTones; i++) {
    pinMode(buttonPins[i], INPUT_PULLUP);
  }
  pinMode(SPEAKER_PIN, OUTPUT);
}

void loop() {
  int pitch = 0;
  for (uint8_t i = 0; i < numTones; i++) {
    if (digitalRead(buttonPins[i]) == LOW) {
      pitch = buttonTones[i];
    }
  }
  if (pitch) {
    tone(SPEAKER_PIN, pitch);
  } else {
    noTone(SPEAKER_PIN);
  }
}