Functions
uint8_t	BSP_AUDIO_IN_Init (uint32_t AudioFreq, uint32_t BitRes, uint32_t ChnlNbr)
	Initialize wave recording.
uint8_t	BSP_AUDIO_IN_InitEx (uint16_t InputDevice, uint32_t AudioFreq, uint32_t BitRes, uint32_t ChnlNbr)
	Initialize wave recording.
uint8_t	BSP_AUDIO_IN_ConfigMicDefault (uint32_t InputDevice)
	Initializes default configuration of the Digital Filter for Sigma-Delta Modulators interface (DFSDM).
__weak uint8_t	BSP_AUDIO_IN_ConfigDigitalMic (uint32_t InputDevice, void *Params)
	Initializes the Digital Filter for Sigma-Delta Modulators interface (DFSDM).
uint8_t	BSP_AUDIO_IN_OUT_Init (uint32_t InputDevice, uint32_t OutputDevice, uint32_t AudioFreq, uint32_t BitRes, uint32_t ChnlNbr)
	Initializes wave recording and playback in parallel.
void	BSP_AUDIO_IN_SelectInterface (uint32_t Interface)
	Link digital mic to specified source.
uint32_t	BSP_AUDIO_IN_GetInterface (void)
	Get digital mic interface.
uint8_t	BSP_AUDIO_IN_AllocScratch (int32_t *pScratch, uint32_t size)
	Allocate channel buffer scratch.
uint8_t	BSP_AUDIO_IN_GetChannelNumber (void)
	Return audio in channel number.
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_StopEx (uint32_t InputDevice)
	Stops audio recording.
uint8_t	BSP_AUDIO_IN_Pause (void)
	Pause the audio file stream.
uint8_t	BSP_AUDIO_IN_PauseEx (uint32_t InputDevice)
	Pauses the audio file stream.
uint8_t	BSP_AUDIO_IN_Resume (void)
	Resume the audio file stream.
uint8_t	BSP_AUDIO_IN_ResumeEx (uint32_t *pBuf, uint32_t InputDevice)
	Resumes the audio file stream.
uint8_t	BSP_AUDIO_IN_SetVolume (uint8_t Volume)
	Controls the audio in volume level.
void	BSP_AUDIO_IN_DeInit (void)
	Deinit the audio IN peripherals.
uint8_t	BSP_AUDIO_IN_PDMToPCM_Init (uint32_t AudioFreq, uint32_t ChnlNbrIn, uint32_t ChnlNbrOut)
	Initialize the PDM library.
uint8_t	BSP_AUDIO_IN_PDMToPCM (uint16_t PDMBuf, uint16_t PCMBuf)
	Converts audio format from PDM to PCM.
__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_TransferComplete_CallBackEx (uint32_t InputDevice)
	User callback when record buffer is filled.
__weak void	BSP_AUDIO_IN_HalfTransfer_CallBackEx (uint32_t InputDevice)
	User callback when record buffer is filled.
__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 (uint32_t AudioFreq, void *Params)
	Clock Config.
uint8_t	BSP_AUDIO_IN_RecordEx (uint32_t *pBuf, uint32_t Size)
uint8_t	BSP_AUDIO_IN_SetFrequency (uint32_t AudioFreq)

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 1243 of file stm32h743i_eval_audio.c.

References AUDIO_OK, AUDIOIN_ContextTypeDef::ChannelNbr, pScratchBuff, and ScratchSize.

void BSP_AUDIO_IN_ClockConfig	(	uint32_t	AudioFreq,
		void *	Params
	)

Clock Config.

Parameters:

AudioFreq,:	Audio frequency used to play the audio stream.
Params,:	pointer on additional configuration parameters, can be NULL.

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 1649 of file stm32h743i_eval_audio.c.

References AUDIO_IN_INTERFACE_PDM, and AUDIOIN_ContextTypeDef::Interface.

Referenced by BSP_AUDIO_IN_InitEx().

uint8_t BSP_AUDIO_IN_ConfigDigitalMic	(	uint32_t	InputDevice,
		void *	Params
	)

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

Parameters:

InputDevice,:	The microphone to be configured. Can be INPUT_DEVICE_DIGITAL_MIC1..INPUT_DEVICE_DIGITAL_MIC5
Params,:	pointer on additional configuration parameters, can be NULL.

Return values:

AUDIO_OK if correct communication, else wrong communication

Definition at line 1119 of file stm32h743i_eval_audio.c.

References BSP_AUDIO_IN_ConfigMicDefault().

Referenced by BSP_AUDIO_IN_InitEx().

uint8_t BSP_AUDIO_IN_ConfigMicDefault ( uint32_t InputDevice )

Initializes default configuration of the Digital Filter for Sigma-Delta Modulators interface (DFSDM).

Parameters:

InputDevice,: The microphone to be configured. Can be INPUT_DEVICE_DIGITAL_MIC1..INPUT_DEVICE_DIGITAL_MIC5

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 1035 of file stm32h743i_eval_audio.c.

References AUDIO_DFSDMx_MIC1_CHANNEL, AUDIO_DFSDMx_MIC1_CHANNEL_FOR_FILTER, AUDIO_DFSDMx_MIC1_FILTER, AUDIO_DFSDMx_MIC2_CHANNEL, AUDIO_DFSDMx_MIC2_CHANNEL_FOR_FILTER, AUDIO_DFSDMx_MIC2_FILTER, AUDIO_ERROR, AUDIO_OK, AUDIOIN_ContextTypeDef::ChannelNbr, DFSDM_CLOCK_DIVIDER, DFSDM_FILTER_ORDER, DFSDM_MIC_BIT_SHIFT, DFSDM_MIC_NUMBER, DFSDM_OVER_SAMPLING, AUDIOIN_ContextTypeDef::Frequency, hAudioInDfsdmChannel, hAudioInDfsdmFilter, INPUT_DEVICE_DIGITAL_MIC1, INPUT_DEVICE_DIGITAL_MIC2, AUDIOIN_ContextTypeDef::InputDevice, and POS_VAL.

Referenced by BSP_AUDIO_IN_ConfigDigitalMic().

void BSP_AUDIO_IN_DeInit ( void )

Deinit the audio IN peripherals.

Return values:

None

Definition at line 1481 of file stm32h743i_eval_audio.c.

References AUDIO_IN_INTERFACE_DFSDM, BSP_AUDIO_IN_MspDeInit(), DFSDMx_DeInit(), haudio_in_sai, AUDIOIN_ContextTypeDef::Interface, and SAIx_In_DeInit().

void BSP_AUDIO_IN_Error_CallBack ( void )

Audio IN Error callback function.

Return values:

None

Definition at line 1596 of file stm32h743i_eval_audio.c.

Referenced by HAL_SAI_ErrorCallback().

uint8_t BSP_AUDIO_IN_GetChannelNumber ( void )

Return audio in channel number.

Return values:

Number of channel

Definition at line 1262 of file stm32h743i_eval_audio.c.

References AUDIOIN_ContextTypeDef::ChannelNbr.

uint32_t BSP_AUDIO_IN_GetInterface ( void )

Get digital mic interface.

Return values:

Digital mic interface.

Definition at line 1233 of file stm32h743i_eval_audio.c.

References AUDIOIN_ContextTypeDef::Interface.

void BSP_AUDIO_IN_HalfTransfer_CallBack ( void )

Manages the DMA Half Transfer complete event.

Return values:

None

Definition at line 1563 of file stm32h743i_eval_audio.c.

Referenced by HAL_DFSDM_FilterRegConvCpltCallback(), HAL_DFSDM_FilterRegConvHalfCpltCallback(), and HAL_SAI_RxHalfCpltCallback().

void BSP_AUDIO_IN_HalfTransfer_CallBackEx ( uint32_t InputDevice )

User callback when record buffer is filled.

Parameters:

InputDevice,: INPUT_DEVICE_DIGITAL_MIC1 or INPUT_DEVICE_DIGITAL_MIC2

Definition at line 1585 of file stm32h743i_eval_audio.c.

Referenced by 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 897 of file stm32h743i_eval_audio.c.

References AUDIO_IN_INTERFACE_DFSDM, BSP_AUDIO_IN_InitEx(), BSP_AUDIO_IN_SelectInterface(), and INPUT_DEVICE_DIGITAL_MIC.

uint8_t BSP_AUDIO_IN_InitEx	(	uint16_t	InputDevice,
		uint32_t	AudioFreq,
		uint32_t	BitRes,
		uint32_t	ChnlNbr
	)

Initialize wave recording.

Parameters:

InputDevice,:	INPUT_DEVICE_DIGITAL_MIC or INPUT_DEVICE_ANALOG_MIC.
AudioFreq,:	Audio frequency to be configured.
BitRes,:	Audio bit resolution to be configured..
ChnlNbr,:	Number of channel to be configured.

Return values:

AUDIO_OK if correct communication, else wrong communication

Definition at line 912 of file stm32h743i_eval_audio.c.

References AUDIO_ERROR, AUDIO_IN_INTERFACE_DFSDM, AUDIO_IN_INTERFACE_PDM, AUDIO_IN_INTERFACE_SAI, AUDIO_IN_SAI_PDMx, AUDIO_IN_SAIx, AUDIO_OK, AUDIOIN_ContextTypeDef::BitResolution, BSP_AUDIO_IN_ClockConfig(), BSP_AUDIO_IN_ConfigDigitalMic(), BSP_AUDIO_IN_MspInit(), BSP_AUDIO_IN_PDMToPCM_Init(), AUDIOIN_ContextTypeDef::ChannelNbr, CODEC_AUDIOFRAME_SLOT_0, CODEC_AUDIOFRAME_SLOT_13, DFSDM_MIC_NUMBER, AUDIOIN_ContextTypeDef::Frequency, haudio_in_sai, INPUT_DEVICE_DIGITAL_MIC, INPUT_DEVICE_DIGITAL_MIC1, AUDIOIN_ContextTypeDef::InputDevice, AUDIOIN_ContextTypeDef::Interface, SAIx_In_DeInit(), and SAIx_In_Init().

Referenced by BSP_AUDIO_IN_Init().

void BSP_AUDIO_IN_MspDeInit ( void )

DeInitialize BSP_AUDIO_IN MSP.

Return values:

None

Definition at line 1626 of file stm32h743i_eval_audio.c.

References AUDIO_IN_INTERFACE_DFSDM, DFSDMx_ChannelMspDeInit(), DFSDMx_FilterMspDeInit(), haudio_in_sai, AUDIOIN_ContextTypeDef::Interface, and SAIx_In_MspDeInit().

Referenced by BSP_AUDIO_IN_DeInit().

void BSP_AUDIO_IN_MspInit ( void )

Initialize BSP_AUDIO_IN MSP.

Return values:

None

Definition at line 1606 of file stm32h743i_eval_audio.c.

References AUDIO_IN_INTERFACE_DFSDM, DFSDMx_ChannelMspInit(), DFSDMx_FilterMspInit(), haudio_in_sai, AUDIOIN_ContextTypeDef::Interface, and SAIx_In_MspInit().

Referenced by BSP_AUDIO_IN_InitEx(), and BSP_AUDIO_IN_OUT_Init().

uint8_t BSP_AUDIO_IN_OUT_Init	(	uint32_t	InputDevice,
		uint32_t	OutputDevice,
		uint32_t	AudioFreq,
		uint32_t	BitRes,
		uint32_t	ChnlNbr
	)

Initializes wave recording and playback in parallel.

Parameters:

InputDevice,:	INPUT_DEVICE_DIGITAL_MICROPHONE_2
OutputDevice,:	OUTPUT_DEVICE_SPEAKER, OUTPUT_DEVICE_HEADPHONE, or OUTPUT_DEVICE_BOTH.
AudioFreq,:	Audio frequency to be configured for the SAI peripheral.
BitRes,:	Audio frequency to be configured.
ChnlNbr,:	Channel number.

Return values:

AUDIO_OK if correct communication, else wrong communication

Definition at line 1140 of file stm32h743i_eval_audio.c.

References audio_drv, AUDIO_ERROR, AUDIO_I2C_ADDRESS, AUDIO_IN_SAIx, AUDIO_OK, AUDIO_OUT_SAIx, AUDIOIN_ContextTypeDef::BitResolution, BSP_AUDIO_IN_MspInit(), BSP_AUDIO_OUT_ClockConfig(), BSP_AUDIO_OUT_MspInit(), AUDIOIN_ContextTypeDef::ChannelNbr, CODEC_AUDIOFRAME_SLOT_02, CODEC_AUDIOFRAME_SLOT_13, AUDIOIN_ContextTypeDef::Frequency, haudio_in_sai, haudio_out_sai, AUDIOIN_ContextTypeDef::InputDevice, SAIx_In_Init(), and SAIx_Out_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 1363 of file stm32h743i_eval_audio.c.

References AUDIO_ERROR, AUDIO_OK, hAudioInDfsdmFilter, INPUT_DEVICE_ANALOG_MIC, INPUT_DEVICE_DIGITAL_MIC1, INPUT_DEVICE_DIGITAL_MIC2, AUDIOIN_ContextTypeDef::InputDevice, and POS_VAL.

uint8_t BSP_AUDIO_IN_PauseEx ( uint32_t InputDevice )

Pauses the audio file stream.

Parameters:

InputDevice,: Microphone to be paused. Can be INPUT_DEVICE_DIGITAL_MIC1 or INPUT_DEVICE_DIGITAL_MIC2.

Return values:

AUDIO_OK if correct communication, else wrong communication

Definition at line 1392 of file stm32h743i_eval_audio.c.

References AUDIO_ERROR, AUDIO_OK, hAudioInDfsdmFilter, INPUT_DEVICE_DIGITAL_MIC1, INPUT_DEVICE_DIGITAL_MIC2, and POS_VAL.

Referenced by BSP_AUDIO_IN_Stop(), and BSP_AUDIO_IN_StopEx().

uint8_t BSP_AUDIO_IN_PDMToPCM	(	uint16_t *	PDMBuf,
		uint16_t *	PCMBuf
	)

Converts audio format from PDM to PCM.

Parameters:

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

Return values:

AUDIO_OK in case of success, AUDIO_ERROR otherwise

Definition at line 1536 of file stm32h743i_eval_audio.c.

References AUDIO_OK, AUDIOIN_ContextTypeDef::ChannelNbr, and PDM_FilterHandler.

uint8_t BSP_AUDIO_IN_PDMToPCM_Init	(	uint32_t	AudioFreq,
		uint32_t	ChnlNbrIn,
		uint32_t	ChnlNbrOut
	)

Initialize the PDM library.

Parameters:

AudioFreq,:	Audio sampling frequency
ChnlNbrIn,:	Number of input audio channels in the PDM buffer
ChnlNbrOut,:	Number of desired output audio channels in the resulting PCM buffer

Return values:

None

Definition at line 1501 of file stm32h743i_eval_audio.c.

References AUDIO_OK, PDM_FilterConfig, and PDM_FilterHandler.

Referenced by BSP_AUDIO_IN_InitEx().

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 1273 of file stm32h743i_eval_audio.c.

References AppBuffHalf, AppBuffTrigger, AUDIO_ERROR, AUDIO_IN_INTERFACE_DFSDM, AUDIO_OK, haudio_in_sai, hAudioInDfsdmFilter, INPUT_DEVICE_DIGITAL_MIC1, INPUT_DEVICE_DIGITAL_MIC2, AUDIOIN_ContextTypeDef::Interface, POS_VAL, AUDIOIN_ContextTypeDef::pRecBuf, pScratchBuff, AUDIOIN_ContextTypeDef::RecSize, and ScratchSize.

uint8_t BSP_AUDIO_IN_RecordEx	(	uint32_t *	pBuf,
		uint32_t	Size
	)

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 1414 of file stm32h743i_eval_audio.c.

References AUDIO_ERROR, AUDIO_OK, hAudioInDfsdmFilter, INPUT_DEVICE_ANALOG_MIC, INPUT_DEVICE_DIGITAL_MIC1, INPUT_DEVICE_DIGITAL_MIC2, AUDIOIN_ContextTypeDef::InputDevice, POS_VAL, pScratchBuff, and ScratchSize.

uint8_t BSP_AUDIO_IN_ResumeEx	(	uint32_t *	pBuf,
		uint32_t	InputDevice
	)

Resumes the audio file stream.

Parameters:

pBuf,:	Main buffer pointer for the recorded data storing
InputDevice,:	Microphone to be paused. Can be INPUT_DEVICE_DIGITAL_MIC1 or INPUT_DEVICE_DIGITAL_MIC2.

Return values:

AUDIO_OK if correct communication, else wrong communication

Definition at line 1444 of file stm32h743i_eval_audio.c.

References AUDIO_ERROR, AUDIO_OK, hAudioInDfsdmFilter, INPUT_DEVICE_DIGITAL_MIC1, INPUT_DEVICE_DIGITAL_MIC2, MicBuff, POS_VAL, and AUDIOIN_ContextTypeDef::RecSize.