#include "Pitches.h"

#define BUZZER_GPIO_PIN 14

//1000 ms = 1 second = 1 full note
//500 ms = 0.5 seconds = 1 half note
//etc..
#define DOUBLE_WHOLE_NOTE 2000
#define WHOLE_NOTE 1000
#define HALF_NOTE 500
#define QUARTER_NOTE 250
#define EIGHTH_NOTE 125



void setup() 
{
  Serial1.begin(115200);
  
  pinMode(BUZZER_GPIO_PIN, OUTPUT);

  Serial1.println("Happy Birthday Song");
}

void playNote(int pitch, int duration)
{
  tone(BUZZER_GPIO_PIN, pitch);
  delay(duration * 0.75); //Play the note for 75% of the duration
  noTone(BUZZER_GPIO_PIN); //Stop playing note
  delay(duration * 0.25); //Don't play the note for 25% of the duration

  //Note I had to put that 75% and 25% in there because when you played
  //a note a bunch of times in a row they ran together.  I wanted it
  //to sound like you pressed the piano key for 75% of the time
  //then let your finger up off of the piano key for 25% of the time.

  //Those probably should be constants you define at top.  
  //Play around with those until they match your liking.
}

// Define the struct for a note
struct Note {
  int pitch;
  int duration;
};

Note song[] = {
  { NOTE_C4, HALF_NOTE }, { NOTE_C4, HALF_NOTE }, { NOTE_D4, WHOLE_NOTE },
  { NOTE_C4, WHOLE_NOTE }, { NOTE_F4, WHOLE_NOTE }, { NOTE_E4, DOUBLE_WHOLE_NOTE },
  { NOTE_C4, HALF_NOTE }, { NOTE_C4, HALF_NOTE }, { NOTE_D4, WHOLE_NOTE },
  { NOTE_C4, WHOLE_NOTE }, { NOTE_G4, WHOLE_NOTE }, { NOTE_F4, DOUBLE_WHOLE_NOTE },
  { NOTE_C4, HALF_NOTE }, { NOTE_C4, HALF_NOTE }, { NOTE_C5, WHOLE_NOTE },
  { NOTE_A4, WHOLE_NOTE }, { NOTE_F4, WHOLE_NOTE }, { NOTE_E4, WHOLE_NOTE }, { NOTE_D4, WHOLE_NOTE },
  { NOTE_AS4, HALF_NOTE }, { NOTE_AS4, HALF_NOTE }, { NOTE_A4, WHOLE_NOTE },
  { NOTE_F4, WHOLE_NOTE }, { NOTE_G4, WHOLE_NOTE }, { NOTE_F4, DOUBLE_WHOLE_NOTE }
};

void loop() 
{
  int numNotes = sizeof(song) / sizeof(song[0]);
  for (int i = 0; i < numNotes; i++) 
  {
    playNote(song[i].pitch, song[i].duration);
  }

  // sleep for 10 seconds before starting the song over
  delay(10000); 
}