37 lines
1.0 KiB
C
37 lines
1.0 KiB
C
#include <stdint.h>
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#include <stdbool.h>
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#include <avr/io.h>
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#include <util/delay.h>
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#include "musical_notes.h"
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#ifndef AUDIO_H
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#define AUDIO_H
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typedef union {
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uint8_t raw;
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struct {
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bool enable :1;
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uint8_t level :7;
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};
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} audio_config_t;
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void audio_toggle(void);
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void audio_on(void);
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void audio_off(void);
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void play_sample(uint8_t * s, uint16_t l, bool r);
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void play_note(double freq, int vol);
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void stop_note(double freq);
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void stop_all_notes(void);
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void init_notes(void);
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void play_notes(float (*np)[][2], uint8_t n_length, bool n_repeat, float n_rest);
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// These macros are used to allow play_notes to play an array of indeterminate
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// length. This works around the limitation of C's sizeof operation on pointers.
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// The global float array for the song must be used here.
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#define NOTE_ARRAY_SIZE(x) ((int)(sizeof(x) / (sizeof(x[0]))))
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#define PLAY_NOTE_ARRAY(note_array, note_repeat, note_rest_style) play_notes(¬e_array, NOTE_ARRAY_SIZE((note_array)), (note_repeat), (note_rest_style));
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#endif |