STM324x9I EVAL AUDIO IN Exported Functions

Functions
uint8_t	BSP_AUDIO_IN_Init (uint32_t AudioFreq, uint32_t BitRes, uint32_t ChnlNbr)
	Initializes wave recording.
uint8_t	BSP_AUDIO_IN_Record (uint16_t *pData, uint32_t Size)
	Starts audio recording.
uint8_t	BSP_AUDIO_IN_Stop (void)
	Stops audio recording.
uint8_t	BSP_AUDIO_IN_Pause (void)
	Pauses the audio file stream.
uint8_t	BSP_AUDIO_IN_Resume (void)
	Resumes the audio file stream.
uint8_t	BSP_AUDIO_IN_SetVolume (uint8_t Volume)
	Controls the audio in volume level.
uint8_t	BSP_AUDIO_IN_PDMToPCM (uint16_t *PDMBuf, uint16_t *PCMBuf)
	Converts audio format from PDM to PCM.
void	BSP_AUDIO_IN_TransferComplete_CallBack (void)
	User callback when record buffer is filled.
void	BSP_AUDIO_IN_HalfTransfer_CallBack (void)
	Manages the DMA Half Transfer complete event.
void	BSP_AUDIO_IN_Error_Callback (void)
	Audio IN Error callback function.

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Function Documentation

void BSP_AUDIO_IN_Error_Callback

(

void

)

Audio IN Error callback function.

Definition at line 870 of file stm324x9i_eval_audio.c.

Referenced by HAL_I2S_ErrorCallback().

void BSP_AUDIO_IN_HalfTransfer_CallBack

(

void

)

Manages the DMA Half Transfer complete event.

Definition at line 860 of file stm324x9i_eval_audio.c.

Referenced by HAL_I2S_RxHalfCpltCallback().

uint8_t BSP_AUDIO_IN_Init	(	uint32_t	AudioFreq,
		uint32_t	BitRes,
		uint32_t	ChnlNbr
	)

Initializes wave recording.

Note:

This function assumes that the I2S input clock (through PLL_R in Devices RevA/Z and through dedicated PLLI2S_R in Devices RevB/Y) is already configured and ready to be used.

Parameters:

AudioFreq,:	Audio frequency to be configured for the I2S peripheral.
BitRes,:	Audio frequency to be configured for the I2S peripheral.
ChnlNbr,:	Audio frequency to be configured for the I2S peripheral.

Return values:

AUDIO_OK

if correct communication, else wrong communication

Definition at line 681 of file stm324x9i_eval_audio.c.

References AUDIO_OK, I2Sx_Init(), PDMDecoder_Init(), and TIMx_Init().

uint8_t BSP_AUDIO_IN_Pause

(

void

)

Pauses the audio file stream.

Return values:

AUDIO_OK

if correct communication, else wrong communication

Definition at line 747 of file stm324x9i_eval_audio.c.

References AUDIO_OK, and haudio_in_i2s.

uint8_t BSP_AUDIO_IN_PDMToPCM	(	uint16_t *	PDMBuf,
		uint16_t *	PCMBuf
	)

Converts audio format from PDM to PCM.

Parameters:

PDMBuf,:	Pointer to data PDM buffer
PCMBuf,:	Pointer to data PCM buffer

Return values:

AUDIO_OK

if correct communication, else wrong communication

Definition at line 790 of file stm324x9i_eval_audio.c.

References AUDIO_OK, AudioInVolume, Channel_Demux, CHANNEL_DEMUX_MASK, DEFAULT_AUDIO_IN_CHANNEL_NBR, Filter, and INTERNAL_BUFF_SIZE.

uint8_t BSP_AUDIO_IN_Record	(	uint16_t *	pbuf,
		uint32_t	size
	)

Starts audio recording.

Parameters:

pbuf,:	Main buffer pointer for the recorded data storing
size,:	Current size of the recorded buffer

Return values:

AUDIO_OK

if correct communication, else wrong communication

Definition at line 710 of file stm324x9i_eval_audio.c.

References AUDIO_ERROR, AUDIO_OK, and haudio_in_i2s.

uint8_t BSP_AUDIO_IN_Resume

(

void

)

Resumes the audio file stream.

Return values:

AUDIO_OK

if correct communication, else wrong communication

Definition at line 760 of file stm324x9i_eval_audio.c.

References AUDIO_OK, and haudio_in_i2s.

uint8_t BSP_AUDIO_IN_SetVolume

(

uint8_t

Volume

)

Controls the audio in volume level.

Parameters:

Volume,:

Volume level to be set in percentage from 0% to 100% (0 for Mute and 100 for Max volume level).

Return values:

AUDIO_OK

if correct communication, else wrong communication

Definition at line 775 of file stm324x9i_eval_audio.c.

References AUDIO_OK, and AudioInVolume.

uint8_t BSP_AUDIO_IN_Stop

(

void

)

Stops audio recording.

Return values:

AUDIO_OK

if correct communication, else wrong communication

Definition at line 727 of file stm324x9i_eval_audio.c.

References AUDIO_ERROR, AUDIO_OK, AUDIO_TIMx_CLK_DISABLE, and haudio_in_i2s.

void BSP_AUDIO_IN_TransferComplete_CallBack

(

void

)

User callback when record buffer is filled.

Definition at line 850 of file stm324x9i_eval_audio.c.

Referenced by HAL_I2S_RxCpltCallback().