Macros
#define	XENON_TONE_AMPLITUDE_100 12000

#define	XENON_TONE_AMPLITUDE_50 6000

#define	XENON_TONE_AMPLITUDE_25 3000

#define	xenon_post_beep() xenon_tone(950, 250, XENON_TONE_AMPLITUDE_50)

Functions
void	xenon_sound_init (void)

void	xenon_sound_submit (void *data, int len)

int	xenon_sound_get_free (void)

int	xenon_sound_get_unplayed (void)

void	xenon_tone (uint32_t frequency, uint32_t duration, int16_t amplitude)

Macro Definition Documentation

◆ xenon_post_beep

#define xenon_post_beep ( ) xenon_tone(950, 250, XENON_TONE_AMPLITUDE_50)

Does the classic POST beep that old computers do (950hz tone, 250ms)

Definition at line 50 of file sound.h.

◆ XENON_TONE_AMPLITUDE_100

#define XENON_TONE_AMPLITUDE_100 12000

Definition at line 43 of file sound.h.

◆ XENON_TONE_AMPLITUDE_25

#define XENON_TONE_AMPLITUDE_25 3000

Definition at line 45 of file sound.h.

◆ XENON_TONE_AMPLITUDE_50

#define XENON_TONE_AMPLITUDE_50 6000

Definition at line 44 of file sound.h.

Function Documentation

◆ xenon_sound_get_free()

int xenon_sound_get_free ( void )

Returns: Available free buffer space in bytes.

Definition at line 93 of file sound.c.

◆ xenon_sound_get_unplayed()

int xenon_sound_get_unplayed ( void )

Returns: Unplayed queued data size in bytes.

Definition at line 111 of file sound.c.

◆ xenon_sound_init()

void xenon_sound_init ( void )

Initialize DAC, de-assert AUD_CLAMP, initialize HDMI audio

Definition at line 16 of file sound.c.

◆ xenon_sound_submit()

void xenon_sound_submit	(	void *	data,
		int	len
	)

Submit PCM audio data to be played on the conencted TV, monitor, audio device

48kHz sample rate Signed 16-bit stereo PCM, little endian

Parameters

data	Pointer to buffer of audio data
len	Number of bytes from the buffer to submit

Definition at line 69 of file sound.c.

◆ xenon_tone()

void xenon_tone	(	uint32_t	frequency,
		uint32_t	duration,
		int16_t	amplitude
	)

Generare a square wave tone