btdmp.h File Reference

BTDMP (speakers/microphone FIFO). More...

#include <teak/types.h>

Functions
void	btdmpDisableInput (int channel)
	Disables audio recording from a BTDMP channel. More...
void	btdmpDisableOutput (int channel)
	Disables audio output from a BTDMP channel. More...
static int	btdmpReceiveFifoEmpty (int channel)
	Checks if the receive FIFO of a BTDMP channel is empty or not. More...
void	btdmpSetupInputMicrophone (int channel, int irq_index)
	Setups a BTDMP channel to record audio from the DS microphone. More...
void	btdmpSetupOutputSpeakers (int channel, int irq_index)
	Setups a BTDMP channel to output audio to the DS speakers. More...
static int	btdmpTransmitFifoFull (int channel)
	Checks if the transmit FIFO of a BTDMP channel is full or not. More...

Detailed Description

BTDMP (speakers/microphone FIFO).

Function Documentation

btdmpDisableInput()

void btdmpDisableInput

(

int

channel

)

Disables audio recording from a BTDMP channel.

Parameters

channel

The BTDMP channel to disable.

btdmpDisableOutput()

void btdmpDisableOutput

(

int

channel

)

Disables audio output from a BTDMP channel.

Parameters

channel

The BTDMP channel to disable.

btdmpReceiveFifoEmpty()

static int btdmpReceiveFifoEmpty ( int  channel )

inlinestatic

Checks if the receive FIFO of a BTDMP channel is empty or not.

Parameters

channel

The BTDMP channel to check.

Returns

1 if the FIFO is empty, 0 otherwise.

btdmpSetupInputMicrophone()

void btdmpSetupInputMicrophone	(	int	channel,
		int	irq_index
	)

Setups a BTDMP channel to record audio from the DS microphone.

Note: Remember to power on the microphone from the ARM7. You can run this in the ARM9 to do it:

soundMicPowerOn();

And you can run this to power it off when you're no longer recording:

soundMicPowerOff();

Parameters

channel	The BTDMP channel to use.
irq_index	The CPU interrupt to use (0 to 2).

btdmpSetupOutputSpeakers()

void btdmpSetupOutputSpeakers	(	int	channel,
		int	irq_index
	)

Setups a BTDMP channel to output audio to the DS speakers.

Note: Remember to setup REG_SNDEXTCNT from the ARM7 to enable sound output from the DSP. For example, for 50% DSP output and 50% ARM7 output, run this on the ARM9:

soundExtSetRatio(4);

Parameters

channel	The BTDMP channel to use.
irq_index	The CPU interrupt to use (0 to 2).

btdmpTransmitFifoFull()

static int btdmpTransmitFifoFull ( int  channel )

inlinestatic

Checks if the transmit FIFO of a BTDMP channel is full or not.

Parameters

channel

The BTDMP channel to check.

Returns

1 if the FIFO is full, 0 otherwise.