Buzzer

Functions for controlling the buzzer. Functions for controlling the buzzer. Include buzzer.h to access these functions. More...

Defines
#define	C4   260
	Middle C.
#define	C4s   277
	C#.
#define	D4   294
	D.
#define	D4s   311
	D#.
#define	E4   330
	E.
#define	F4   349
	F.
#define	F4s   370
	F#.
#define	G4   392
	G.
#define	G4s   415
	G#.
#define	A4   440
	A.
#define	A4s   466
	A#.
#define	B4   494
	B.
#define	C5   523
	C.
Functions
void	buzzer_init (void)
	Initialize the buzzer.
void	buzzer_set_val (unsigned int buzz_value)
	Set the value the buzzer plays.
void	buzzer_set_freq (unsigned int buzz_freq)
	Set the frequency the buzzer plays.
void	buzzer_chirp (unsigned int ms, unsigned int buzz_freq)
	Play a frequency for a specified time.
void	buzzer_off (void)
	Turn the buzzer off.

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Detailed Description

Functions for controlling the buzzer. Functions for controlling the buzzer. Include buzzer.h to access these functions.

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Function Documentation

void buzzer_chirp	(	unsigned int	ms,
		unsigned int	buzz_freq
	)

Play a frequency for a specified time.

Plays the specified frequency for the specified amount of time. This function blocks execution until the time is completed. buzzer_init must be called before this function can be used.

Parameters:

	ms	the time in milliseconds to play the frequency
	buzz_freq	the frequency to play

See also:

buzzer_init, buzzer_set_freq

void buzzer_init

(

void

)

Initialize the buzzer.

Initializes the buzzer. Must be called before any other buzzer function may be used.

void buzzer_off

(

)

Turn the buzzer off.

Turns off the buzzer by disabling the timer0 clock.

See also:

buzzer_init

void buzzer_set_freq

(

unsigned int

buzz_freq

)

Set the frequency the buzzer plays.

Sets the buzzer frequency. Usage of constants such as C4 is highly recommended as input to this function. buzzer_init must be called before this function may be used.

Parameters:

buzz_freq

the frequency to set the buzzer to

See also:

buzzer_init, buzzer_set_val, buzzer_off

void buzzer_set_val

(

unsigned int

buzz_value

)

Set the value the buzzer plays.

Sets the value of the buzzer's pitch. Higher values are lower frequencies.

Parameters:

buzz_value

the value to set the buzzer's frequency too, in the range 0-255

See also:

buzzer_init, buzzer_set_freq, buzzer_off

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