buzzer.h File Reference

Buzzer subsystem functions. More...

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Typedefs
typedef uint16_t	note
	Note type.
Functions
void	buzzer_init (void)
	Initialize buzzer subsystem.
void	buzzer_play (note *notes)
	Play a sequence of notes using the buzzer.

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Detailed Description

Buzzer subsystem functions.

This file contains all the methods used for \ playing tones with buzzer. The buzzer can play a number of different tones, represented as a note array. The buzzer output frequency can be calculated using:

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Typedef Documentation

typedef uint16_t note

Note type.

This is a type representing a note. It is composed by:

• The first 4 MSB represent the pitch
• The next 2 bits represent the octave
• The following 10 bits are the duration in ms of the note.

There are two "meta" notes:

• The note xxx0 represents no tone (a rest).
• The note xxxF represents the "stop note" marking the \ end of a note sequence.

Note:

The stop note is needed in the play loop to determine \ when to end the melody.

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Function Documentation

void buzzer_play

(

note *

notes

)

Play a sequence of notes using the buzzer.

Parameters:

notes

An array of notes to play.