Functions
uint8_t	BSP_AUDIO_OUT_Init (uint16_t OutputDevice, uint8_t Volume, uint32_t AudioFreq)
	Configures the audio codec related peripherals.
uint8_t	BSP_AUDIO_OUT_DeInit (void)
	De-Initializes audio codec related peripherals.
uint8_t	BSP_AUDIO_OUT_Play (uint16_t *pData, uint32_t Size)
	Starts playing audio stream from a data buffer for a determined size.
uint8_t	BSP_AUDIO_OUT_ChangeBuffer (uint16_t *pData, uint16_t Size)
	Sends n-Bytes on the SAI interface.
uint8_t	BSP_AUDIO_OUT_Pause (void)
	This function Pauses the audio file stream.
uint8_t	BSP_AUDIO_OUT_Resume (void)
	This function Resumes the audio file stream.
uint8_t	BSP_AUDIO_OUT_Stop (uint32_t Option)
	Stops audio playing and Power down the Audio Codec.
uint8_t	BSP_AUDIO_OUT_SetVolume (uint8_t Volume)
	Controls the current audio volume level.
uint8_t	BSP_AUDIO_OUT_SetMute (uint32_t Cmd)
	Enables or disables the MUTE mode by software.
uint8_t	BSP_AUDIO_OUT_SetOutputMode (uint8_t Output)
	Switch dynamically (while audio file is being played) the output target (speaker or headphone).
uint8_t	BSP_AUDIO_OUT_SetFrequency (uint32_t AudioFreq)
	Updates the audio frequency.
void	BSP_AUDIO_OUT_ChangeAudioConfig (uint32_t AudioOutOption)
	Changes the Audio Out Configuration.
void	BSP_AUDIO_OUT_RegisterCallbacks (Audio_CallbackTypeDef ErrorCallback, Audio_CallbackTypeDef HalfTransferCallback, Audio_CallbackTypeDef TransferCompleteCallback)
	register user callback functions
void	HAL_SAI_TxCpltCallback (SAI_HandleTypeDef *hsai)
	Tx Transfer completed callbacks.
void	HAL_SAI_TxHalfCpltCallback (SAI_HandleTypeDef *hsai)
	Tx Half Transfer completed callbacks.
void	HAL_SAI_ErrorCallback (SAI_HandleTypeDef *hsai)
	SAI error callbacks.
uint8_t	BSP_AUDIO_IN_Init (uint32_t AudioFreq, uint32_t BitRes, uint32_t ChnlNbr)
	Initializes micropone related peripherals.
uint8_t	BSP_AUDIO_IN_DeInit (void)
	De-Initializes microphone related peripherals.
uint8_t	BSP_AUDIO_IN_Record (uint16_t *pData, uint32_t Size)
	Starts audio recording.
uint8_t	BSP_AUDIO_IN_SetFrequency (uint32_t AudioFreq)
	Updates the audio frequency.
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.
void	BSP_AUDIO_IN_RegisterCallbacks (Audio_CallbackTypeDef ErrorCallback, Audio_CallbackTypeDef HalfTransferCallback, Audio_CallbackTypeDef TransferCompleteCallback)
	register user callback functions

Function Documentation

uint8_t BSP_AUDIO_IN_DeInit ( void )

De-Initializes microphone related peripherals.

Return values:

BSP	AUDIO status

Definition at line 740 of file stm32l476g_discovery_audio.c.

References AUDIO_DFSDMx_DeInit(), AUDIO_ERROR, and AUDIO_OK.

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

Initializes micropone related peripherals.

Note:: This function assumes that the SAI input clock (through PLL_M) is already configured and ready to be used.

Parameters:

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

Return values:

BSP	AUDIO status

Definition at line 710 of file stm32l476g_discovery_audio.c.

References AUDIO_DFSDMx_Init(), AUDIO_ERROR, AUDIO_OK, AUDIO_SAIPLLConfig(), AUDIO_IN_TypeDef::BitResolution, AUDIO_IN_TypeDef::CbError, AUDIO_IN_TypeDef::CbHalfTransfer, AUDIO_IN_TypeDef::CbTransferComplete, AUDIO_IN_TypeDef::ChannelNbr, and AUDIO_IN_TypeDef::Frequency.

uint8_t BSP_AUDIO_IN_Pause ( void )

Pauses the audio file stream.

Return values:

BSP	AUDIO status

Definition at line 905 of file stm32l476g_discovery_audio.c.

References AUDIO_ERROR, AUDIO_OK, and BSP_AUDIO_hDfsdmLeftFilter.

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

Note:: The Right channel is start at first with synchro on start of Left channel

Return values:

BSP	AUDIO status

Definition at line 761 of file stm32l476g_discovery_audio.c.

References AUDIO_ERROR, AUDIO_OK, BSP_AUDIO_hDfsdmLeftFilter, DEFAULT_AUDIO_IN_CHANNEL_NBR, AUDIO_IN_TypeDef::LeftRecBuff, AUDIO_IN_TypeDef::pRecBuf, and AUDIO_IN_TypeDef::RecSize.

void BSP_AUDIO_IN_RegisterCallbacks	(	Audio_CallbackTypeDef	ErrorCallback,
		Audio_CallbackTypeDef	HalfTransferCallback,
		Audio_CallbackTypeDef	TransferCompleteCallback
	)

register user callback functions

Parameters:

ErrorCallback,:	pointer to the error callback function
HalfTransferCallback,:	pointer to the half transfer callback function
TransferCompleteCallback,:	pointer to the transfer complete callback function

Return values:

None

Definition at line 940 of file stm32l476g_discovery_audio.c.

References AUDIO_IN_TypeDef::CbError, AUDIO_IN_TypeDef::CbHalfTransfer, and AUDIO_IN_TypeDef::CbTransferComplete.

uint8_t BSP_AUDIO_IN_Resume ( void )

Resumes the audio file stream.

Return values:

BSP	AUDIO status

Definition at line 920 of file stm32l476g_discovery_audio.c.

References AUDIO_ERROR, AUDIO_OK, BSP_AUDIO_hDfsdmLeftFilter, DEFAULT_AUDIO_IN_CHANNEL_NBR, AUDIO_IN_TypeDef::LeftRecBuff, and AUDIO_IN_TypeDef::RecSize.

uint8_t BSP_AUDIO_IN_SetFrequency ( uint32_t AudioFreq )

Updates the audio frequency.

Parameters:

AudioFreq,: Audio frequency used to record the audio stream.

Note:: This API should be called after the BSP_AUDIO_IN_Init() to adjust the audio frequency.

Return values:

BSP	AUDIO status

Definition at line 795 of file stm32l476g_discovery_audio.c.

References AUDIO_DFSDMx_DeInit(), AUDIO_DFSDMx_Init(), AUDIO_ERROR, AUDIO_OK, and AUDIO_SAIPLLConfig().

uint8_t BSP_AUDIO_IN_Stop ( void )

Stops audio recording.

Return values:

BSP	AUDIO status

Definition at line 883 of file stm32l476g_discovery_audio.c.

References AUDIO_ERROR, AUDIO_OK, BSP_AUDIO_hDfsdmLeftFilter, and AUDIO_IN_TypeDef::LeftRecBuff.

void BSP_AUDIO_OUT_ChangeAudioConfig ( uint32_t AudioOutOption )

Changes the Audio Out Configuration.

Parameters:

AudioOutOption,: specifies the audio out new configuration This parameter can be any value of BSP Audio Out Option

Note:: This API should be called after the BSP_AUDIO_OUT_Init() to adjust the audio out configuration.

Return values:

None

Definition at line 582 of file stm32l476g_discovery_audio.c.

References BSP_AUDIO_hSai, BSP_AUDIO_OUT_CIRCULARMODE, and BSP_AUDIO_OUT_STEREOMODE.

uint8_t BSP_AUDIO_OUT_ChangeBuffer	(	uint16_t *	pData,
		uint16_t	Size
	)

Sends n-Bytes on the SAI interface.

Parameters:

pData,:	pointer on PCM samples buffer
Size,:	number of data to be written

Return values:

BSP	AUDIO status

Definition at line 399 of file stm32l476g_discovery_audio.c.

References AUDIO_ERROR, AUDIO_OK, and BSP_AUDIO_hSai.

uint8_t BSP_AUDIO_OUT_DeInit ( void )

De-Initializes audio codec related peripherals.

Return values:

BSP	AUDIO status

Definition at line 353 of file stm32l476g_discovery_audio.c.

References AUDIO_ERROR, AUDIO_OK, AUDIO_SAIx_DeInit(), and AUDIO_OUT_TypeDef::AudioDrv.

uint8_t BSP_AUDIO_OUT_Init	(	uint16_t	OutputDevice,
		uint8_t	Volume,
		uint32_t	AudioFreq
	)

Configures the audio codec related peripherals.

Parameters:

OutputDevice,:	OUTPUT_DEVICE_SPEAKER, OUTPUT_DEVICE_HEADPHONE, or OUTPUT_DEVICE_BOTH.
Volume,:	Initial volume level (from 0 (Mute) to 100 (Max))
AudioFreq,:	Audio frequency used to play the audio stream.ion.

Return values:

BSP	AUDIO status

Note:: The SAI PLL input clock must be configure in the user application. The SAI PLL configuration done within this function assumes that the SAI PLL input clock runs at 8 MHz.

Definition at line 301 of file stm32l476g_discovery_audio.c.

References AUDIO_CODEC_Reset(), AUDIO_ERROR, AUDIO_I2C_ADDRESS, AUDIO_OK, AUDIO_SAIPLLConfig(), AUDIO_SAIx_Init(), AUDIO_OUT_TypeDef::AudioDrv, BSP_AUDIO_OUT_SetVolume(), AUDIO_OUT_TypeDef::CbError, AUDIO_OUT_TypeDef::CbHalfTransfer, and AUDIO_OUT_TypeDef::CbTransferComplete.

uint8_t BSP_AUDIO_OUT_Pause ( void )

This function Pauses the audio file stream.

In case of using DMA, the DMA Pause feature is used.

Note:: When calling BSP_AUDIO_OUT_Pause() function for pause, only BSP_AUDIO_OUT_Resume() function should be called for resume (use of BSP_AUDIO_OUT_Play() function for resume could lead to unexpected behavior).

Return values:

BSP	AUDIO status

Definition at line 419 of file stm32l476g_discovery_audio.c.

References AUDIO_ERROR, AUDIO_I2C_ADDRESS, AUDIO_OK, AUDIO_OUT_TypeDef::AudioDrv, and BSP_AUDIO_hSai.

uint8_t BSP_AUDIO_OUT_Play	(	uint16_t *	pData,
		uint32_t	Size
	)

Starts playing audio stream from a data buffer for a determined size.

Parameters:

pData,:	pointer on PCM samples buffer
Size,:	Number of audio data BYTES.

Return values:

BSP	AUDIO status

Definition at line 376 of file stm32l476g_discovery_audio.c.

References AUDIO_ERROR, AUDIO_I2C_ADDRESS, AUDIO_OK, AUDIO_OUT_TypeDef::AudioDrv, BSP_AUDIO_hSai, and DMA_MAX.

void BSP_AUDIO_OUT_RegisterCallbacks	(	Audio_CallbackTypeDef	ErrorCallback,
		Audio_CallbackTypeDef	HalfTransferCallback,
		Audio_CallbackTypeDef	TransferCompleteCallback
	)

register user callback functions

Parameters:

ErrorCallback,:	pointer to the error callback function
HalfTransferCallback,:	pointer to the half transfer callback function
TransferCompleteCallback,:	pointer to the transfer complete callback function

Return values:

None

Definition at line 642 of file stm32l476g_discovery_audio.c.

References AUDIO_OUT_TypeDef::CbError, AUDIO_OUT_TypeDef::CbHalfTransfer, and AUDIO_OUT_TypeDef::CbTransferComplete.

uint8_t BSP_AUDIO_OUT_Resume ( void )

This function Resumes the audio file stream.

Note:: When calling BSP_AUDIO_OUT_Pause() function for pause, only BSP_AUDIO_OUT_Resume() function should be called for resume (use of BSP_AUDIO_OUT_Play() function for resume could lead to unexpected behavior).

Return values:

BSP	AUDIO status

Definition at line 444 of file stm32l476g_discovery_audio.c.

References AUDIO_ERROR, AUDIO_I2C_ADDRESS, AUDIO_OK, AUDIO_OUT_TypeDef::AudioDrv, and BSP_AUDIO_hSai.

uint8_t BSP_AUDIO_OUT_SetFrequency ( uint32_t AudioFreq )

Updates the audio frequency.

Parameters:

AudioFreq,: Audio frequency used to play the audio stream.

Note:: The SAI PLL input clock must be configure in the user application. The SAI PLL configuration done within this function assumes that the SAI PLL input clock runs at 8 MHz.

Return values:

BSP	AUDIO status

Definition at line 553 of file stm32l476g_discovery_audio.c.

References AUDIO_ERROR, AUDIO_OK, AUDIO_SAIPLLConfig(), BSP_AUDIO_hSai, and SAIClockDivider.

uint8_t BSP_AUDIO_OUT_SetMute ( uint32_t Cmd )

Enables or disables the MUTE mode by software.

Parameters:

Cmd,: Could be AUDIO_MUTE_ON to mute sound or AUDIO_MUTE_OFF to unmute the codec and restore previous volume level.

Return values:

BSP	AUDIO status

Definition at line 516 of file stm32l476g_discovery_audio.c.

References AUDIO_ERROR, AUDIO_I2C_ADDRESS, AUDIO_OK, and AUDIO_OUT_TypeDef::AudioDrv.

uint8_t BSP_AUDIO_OUT_SetOutputMode ( uint8_t Output )

Switch dynamically (while audio file is being played) the output target (speaker or headphone).

Parameters:

Output,: The audio output target: OUTPUT_DEVICE_SPEAKER, OUTPUT_DEVICE_HEADPHONE or OUTPUT_DEVICE_BOTH

Return values:

BSP	AUDIO status

Definition at line 534 of file stm32l476g_discovery_audio.c.

References AUDIO_ERROR, AUDIO_I2C_ADDRESS, AUDIO_OK, and AUDIO_OUT_TypeDef::AudioDrv.

uint8_t BSP_AUDIO_OUT_SetVolume ( uint8_t Volume )

Controls the current audio 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:

BSP	AUDIO status

Definition at line 499 of file stm32l476g_discovery_audio.c.

References AUDIO_ERROR, AUDIO_I2C_ADDRESS, AUDIO_OK, and AUDIO_OUT_TypeDef::AudioDrv.

Referenced by BSP_AUDIO_OUT_Init().

uint8_t BSP_AUDIO_OUT_Stop ( uint32_t Option )

Stops audio playing and Power down the Audio Codec.

Parameters:

Option,:

could be one of the following parameters

CODEC_PDWN_SW: for software power off (by writing registers). Then no need to reconfigure the Codec after power on.
CODEC_PDWN_HW: completely shut down the codec (physically). Then need to reconfigure the Codec after power on.

Return values: