buzzer.h File Reference

Provides a driver for playing musical notes on a PWM-driven buzzer. More...

#include "stm32h7xx_hal.h"

Include dependency graph for buzzer.h:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Data Structures
struct	note_t
	Represents a single musical note with a frequency and duration. More...
struct	buzzer_t
	Represents the buzzer device handle. More...

Macros
#define	REST   0
	A rest (silence) in a melody.
#define	NOTE_Gb5   740
	Note G-flat, 5th octave.
#define	NOTE_D6   1175
	Note D, 6th octave.
#define	NOTE_Db6   1109
	Note D-flat, 6th octave.
#define	NOTE_B5   988
	Note B, 5th octave.
#define	NOTE_A5   880
	Note A, 5th octave.
#define	TEMPO_BASE_MS   100
	The base duration for a note, in milliseconds.
#define	DURATION_QUARTER   (TEMPO_BASE_MS)
	Duration of a quarter note.
#define	DURATION_EIGHTH   (TEMPO_BASE_MS / 2)
	Duration of an eighth note.
#define	DURATION_HALF   (TEMPO_BASE_MS * 2)
	Duration of a half note.

Functions
void	buzzer_init (buzzer_t *bz, TIM_HandleTypeDef *htim, uint32_t channel)
	Initializes the buzzer object and its associated timer hardware.
void	musica_maestro (buzzer_t *bz, const note_t *partition, uint16_t melody_length)
	Plays a melody by iterating through an array of notes.

Variables
buzzer_t	buzzer
	Global instance of the buzzer object.

Detailed Description

Provides a driver for playing musical notes on a PWM-driven buzzer.

Author

Francesco Abate

This module abstracts the low-level timer (TIM) peripheral to provide a simple interface for initializing a buzzer and playing melodies. It includes definitions for musical notes and a structure for defining a song.

Definition in file buzzer.h.