Functions
uint8_t	BSP_AUDIO_IN_Init (uint32_t AudioFreq, uint32_t BitRes, uint32_t ChnlNbr)
	Initialize wave recording.
uint8_t	BSP_AUDIO_IN_AllocScratch (int32_t *pScratch, uint32_t size)
	Allocate channel buffer scratch.
uint8_t	BSP_AUDIO_IN_Record (uint16_t *pbuf, uint32_t size)
	Start audio recording.
uint8_t	BSP_AUDIO_IN_Stop (void)
	Stop audio recording.
uint8_t	BSP_AUDIO_IN_Pause (void)
	Pause the audio file stream.
uint8_t	BSP_AUDIO_IN_Resume (void)
	Resume the audio file stream.
void	BSP_AUDIO_IN_DeInit (void)
	Deinit the audio IN peripherals.
void	HAL_DFSDM_FilterRegConvCpltCallback (DFSDM_Filter_HandleTypeDef *hdfsdm_filter)
	Regular conversion complete callback.
void	HAL_DFSDM_FilterRegConvHalfCpltCallback (DFSDM_Filter_HandleTypeDef *hdfsdm_filter)
	Half regular conversion complete callback.
__weak void	BSP_AUDIO_IN_TransferComplete_CallBack (void)
	User callback when record buffer is filled.
__weak void	BSP_AUDIO_IN_HalfTransfer_CallBack (void)
	Manages the DMA Half Transfer complete event.
__weak void	BSP_AUDIO_IN_Error_Callback (void)
	Audio IN Error callback function.
__weak void	BSP_AUDIO_IN_MspInit (void)
	Initialize BSP_AUDIO_IN MSP.
__weak void	BSP_AUDIO_IN_MspDeInit (void)
	DeInitialize BSP_AUDIO_IN MSP.
__weak void	BSP_AUDIO_IN_ClockConfig (DFSDM_Filter_HandleTypeDef hdfsdm_filter, uint32_t AudioFreq, void Params)
	Clock Config.
static uint8_t	DFSDMx_Init (uint32_t AudioFreq)
	Initialize the Digital Filter for Sigma-Delta Modulators interface (DFSDM).
static uint8_t	DFSDMx_DeInit (void)
	De-initialize the Digital Filter for Sigma-Delta Modulators interface (DFSDM).
static void	DFSDMx_ChannelMspInit (void)
	Initialize the DFSDM channel MSP.
static void	DFSDMx_ChannelMspDeInit (void)
	DeInitialize the DFSDM channel MSP.
static void	DFSDMx_FilterMspInit (void)
	Initialize the DFSDM filter MSP.
static void	DFSDMx_FilterMspDeInit (void)
	DeInitialize the DFSDM filter MSP.

Function Documentation

uint8_t BSP_AUDIO_IN_AllocScratch	(	int32_t *	pScratch,
		uint32_t	size
	)

Allocate channel buffer scratch.

Parameters:

pScratch	: pointer to scratch tables.
size	of scratch buffer

Definition at line 1048 of file stm32f769i_eval_audio.c.

References AUDIO_OK, DEFAULT_AUDIO_IN_CHANNEL_NBR, pScratchBuff, and ScratchSize.

__weak void BSP_AUDIO_IN_ClockConfig	(	DFSDM_Filter_HandleTypeDef *	hdfsdm_filter,
		uint32_t	AudioFreq,
		void *	Params
	)

Clock Config.

Parameters:

hdfsdm_filter,:	might be required to set audio peripheral predivider if any.
AudioFreq,:	Audio frequency used to play the audio stream.
Params

Note:: This API is called by BSP_AUDIO_IN_Init() Being __weak it can be overwritten by the application

Return values:

None

Definition at line 1332 of file stm32f769i_eval_audio.c.

Referenced by BSP_AUDIO_IN_Init().

void BSP_AUDIO_IN_DeInit ( void )

Deinit the audio IN peripherals.

Return values:

None

Definition at line 1166 of file stm32f769i_eval_audio.c.

References BSP_AUDIO_IN_MspDeInit(), and DFSDMx_DeInit().

__weak void BSP_AUDIO_IN_Error_Callback ( void )

Audio IN Error callback function.

Return values:

None

Definition at line 1293 of file stm32f769i_eval_audio.c.

__weak void BSP_AUDIO_IN_HalfTransfer_CallBack ( void )

Manages the DMA Half Transfer complete event.

Return values:

None

Definition at line 1282 of file stm32f769i_eval_audio.c.

Referenced by HAL_DFSDM_FilterRegConvCpltCallback(), and HAL_DFSDM_FilterRegConvHalfCpltCallback().

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

Initialize wave recording.

Parameters:

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

Return values:

AUDIO_OK if correct communication, else wrong communication

Definition at line 1027 of file stm32f769i_eval_audio.c.

References AUDIO_OK, BSP_AUDIO_IN_ClockConfig(), BSP_AUDIO_IN_MspInit(), DFSDMx_Init(), and haudio_in_dfsdm_leftfilter.

__weak void BSP_AUDIO_IN_MspDeInit ( void )

DeInitialize BSP_AUDIO_IN MSP.

Return values:

None

Definition at line 1315 of file stm32f769i_eval_audio.c.

References DFSDMx_ChannelMspDeInit(), and DFSDMx_FilterMspDeInit().

Referenced by BSP_AUDIO_IN_DeInit().

__weak void BSP_AUDIO_IN_MspInit ( void )

Initialize BSP_AUDIO_IN MSP.

Return values:

None

Definition at line 1303 of file stm32f769i_eval_audio.c.

References DFSDMx_ChannelMspInit(), and DFSDMx_FilterMspInit().

Referenced by BSP_AUDIO_IN_Init().

uint8_t BSP_AUDIO_IN_Pause ( void )

Pause the audio file stream.

Return values:

AUDIO_OK if correct communication, else wrong communication

Definition at line 1122 of file stm32f769i_eval_audio.c.

References AUDIO_ERROR, AUDIO_OK, haudio_in_dfsdm_leftfilter, and haudio_in_dfsdm_rightfilter.

uint8_t BSP_AUDIO_IN_Record	(	uint16_t *	pbuf,
		uint32_t	size
	)

Start 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 1069 of file stm32f769i_eval_audio.c.

References AppBuffHalf, AppBuffTrigger, AUDIO_ERROR, AUDIO_OK, haudio_in_dfsdm_leftfilter, haudio_in_dfsdm_rightfilter, AUDIOIN_TypeDef::pRecBuf, pScratchBuff, AUDIOIN_TypeDef::RecSize, and ScratchSize.

uint8_t BSP_AUDIO_IN_Resume ( void )

Resume the audio file stream.

Return values:

AUDIO_OK if correct communication, else wrong communication

Definition at line 1144 of file stm32f769i_eval_audio.c.

References AUDIO_ERROR, AUDIO_OK, haudio_in_dfsdm_leftfilter, haudio_in_dfsdm_rightfilter, pScratchBuff, and ScratchSize.

uint8_t BSP_AUDIO_IN_Stop ( void )

Stop audio recording.

Return values:

AUDIO_OK if correct communication, else wrong communication

Definition at line 1097 of file stm32f769i_eval_audio.c.

References AppBuffHalf, AppBuffTrigger, AUDIO_ERROR, AUDIO_OK, haudio_in_dfsdm_leftfilter, and haudio_in_dfsdm_rightfilter.

__weak void BSP_AUDIO_IN_TransferComplete_CallBack ( void )

User callback when record buffer is filled.

Return values:

None

Definition at line 1271 of file stm32f769i_eval_audio.c.

Referenced by HAL_DFSDM_FilterRegConvCpltCallback(), and HAL_DFSDM_FilterRegConvHalfCpltCallback().

static void DFSDMx_ChannelMspDeInit ( void ) [static]

DeInitialize the DFSDM channel MSP.

Return values:

None

Definition at line 1547 of file stm32f769i_eval_audio.c.

References AUDIO_DFSDMx_CKOUT_DMIC_DATIN_GPIO_PORT, AUDIO_DFSDMx_CKOUT_PIN, and AUDIO_DFSDMx_DMIC_DATIN_PIN.

Referenced by BSP_AUDIO_IN_MspDeInit().

static void DFSDMx_ChannelMspInit ( void ) [static]

Initialize the DFSDM channel MSP.

Return values:

None

Definition at line 1520 of file stm32f769i_eval_audio.c.

References AUDIO_DFSDMx_CKOUT_AF, AUDIO_DFSDMx_CKOUT_DMIC_DATIN_GPIO_CLK_ENABLE, AUDIO_DFSDMx_CKOUT_DMIC_DATIN_GPIO_PORT, AUDIO_DFSDMx_CKOUT_PIN, AUDIO_DFSDMx_CLK_ENABLE, AUDIO_DFSDMx_DMIC_DATIN_AF, and AUDIO_DFSDMx_DMIC_DATIN_PIN.

Referenced by BSP_AUDIO_IN_MspInit().

static uint8_t DFSDMx_DeInit ( void ) [static]

De-initialize the Digital Filter for Sigma-Delta Modulators interface (DFSDM).

Return values:

AUDIO_OK if correct communication, else wrong communication

Definition at line 1489 of file stm32f769i_eval_audio.c.

References AUDIO_ERROR, AUDIO_OK, haudio_in_dfsdm_leftchannel, haudio_in_dfsdm_leftfilter, haudio_in_dfsdm_rightchannel, and haudio_in_dfsdm_rightfilter.

Referenced by BSP_AUDIO_IN_DeInit().

static void DFSDMx_FilterMspDeInit ( void ) [static]

DeInitialize the DFSDM filter MSP.

Return values:

None

Definition at line 1621 of file stm32f769i_eval_audio.c.

References hdma_dfsdm_left, and hdma_dfsdm_right.

Referenced by BSP_AUDIO_IN_MspDeInit().

static void DFSDMx_FilterMspInit ( void ) [static]

Initialize the DFSDM filter MSP.

Return values:

None

Definition at line 1560 of file stm32f769i_eval_audio.c.

References AUDIO_DFSDMx_CLK_ENABLE, AUDIO_DFSDMx_DMAx_CLK_ENABLE, AUDIO_DFSDMx_DMAx_LEFT_CHANNEL, AUDIO_DFSDMx_DMAx_LEFT_IRQ, AUDIO_DFSDMx_DMAx_MEM_DATA_SIZE, AUDIO_DFSDMx_DMAx_PERIPH_DATA_SIZE, AUDIO_DFSDMx_DMAx_RIGHT_CHANNEL, AUDIO_DFSDMx_DMAx_RIGHT_IRQ, AUDIO_OUT_IRQ_PREPRIO, haudio_in_dfsdm_leftfilter, haudio_in_dfsdm_rightfilter, hdma_dfsdm_left, and hdma_dfsdm_right.

Referenced by BSP_AUDIO_IN_MspInit().

static uint8_t DFSDMx_Init ( uint32_t AudioFreq ) [static]

Initialize the Digital Filter for Sigma-Delta Modulators interface (DFSDM).

Parameters:

AudioFreq,: Audio frequency to be used to set correctly the DFSDM peripheral.

Note:

Channel output Clock Divider and Filter Oversampling are calculated as follow:

Clock_Divider = CLK(input DFSDM)/CLK(micro) with 1MHZ < CLK(micro) < 3.2MHZ (TYP 2.4MHZ for MP34DT01TR)
Oversampling = CLK(input DFSDM)/(Clock_Divider * AudioFreq)

Return values:

AUDIO_OK if correct communication, else wrong communication

Definition at line 1385 of file stm32f769i_eval_audio.c.

References AUDIO_DFSDMx_LEFT_FILTER, AUDIO_DFSDMx_RIGHT_FILTER, AUDIO_ERROR, AUDIO_OK, DFSDM_CLOCK_DIVIDER, DFSDM_FILTER_ORDER, DFSDM_OVER_SAMPLING, DFSDM_RIGHT_BIT_SHIFT, haudio_in_dfsdm_leftchannel, haudio_in_dfsdm_leftfilter, haudio_in_dfsdm_rightchannel, and haudio_in_dfsdm_rightfilter.