#ifndef MAIN_H_
#define MAIN_H_

#define F_CPU 8000000UL

#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/pgmspace.h>
#include <util/delay.h>

#include "notes.h"

#define TEMPO			(120 * 4)		// Tempo of song (bpm)
#define REST_FRACTION	0.3				// Fraction of the beat to stay silent between notes
#define BEAT_LENGTH		60000 / TEMPO	// Length of each note (ms)


#define OCTAVES				2
#define NOTES_PER_OCTAVE	12
#define SPEAKER0_LEN		38
#define SPEAKER1_LEN		96

typedef enum {
	a = 0, b, c, d, e, f, g,
	A, C, D, F, G,
	rest
} note_t;

typedef struct {
	note_t note;
	uint8_t duration:7;
	uint8_t octave:1;
} beat_t;

extern const uint8_t PROGMEM notes[OCTAVES][NOTES_PER_OCTAVE];

extern const beat_t PROGMEM song_speaker0[SPEAKER0_LEN];
extern const beat_t PROGMEM song_speaker1[SPEAKER1_LEN];

void play_note(beat_t note, uint8_t speaker);

#endif