speaker

Functions
int	speaker_ctrl (unsigned char on)
	Enables/disables speaker.
int	speaker_test (unsigned long freq, unsigned long time)
	Programs speaker to generate tone for the given time interval.

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Detailed Description

Functions that control the speaker output

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Function Documentation

int speaker_ctrl

(

unsigned char

on

)

Enables/disables speaker.

Enables/disables speaker, by both enabling/disabling Timer 2 and its output gate

Parameters:

on	If zero disable speaker, otherwise enable it

Returns:

Return 0 upon success and non-zero otherwise

int speaker_test	(	unsigned long	freq,
		unsigned long	time
	)

Programs speaker to generate tone for the given time interval.

Parameters:

freq	Frequency of tone to generate in Hz
time	Duration of tone in s

Returns:

Return 0 upon success and non-zero otherwise