STM32L152D_EVAL_AUDIO_IN_Exported_Functions

Functions
uint8_t	BSP_AUDIO_IN_Init (uint32_t AudioFreq, uint32_t BitRes, uint32_t ChnlNbr)
	Initialize wave recording.
uint8_t	BSP_AUDIO_IN_Record (uint16_t *pData, uint32_t Size)
	Start audio recording.
uint8_t	BSP_AUDIO_IN_Stop (void)
	Stop audio recording.
uint8_t	BSP_AUDIO_IN_Pause (void)
	This function Pauses the audio file stream.
uint8_t	BSP_AUDIO_IN_Resume (void)
	This function Resumes the audio file stream.
uint8_t	BSP_AUDIO_IN_SetVolume (uint8_t Volume)
	Controls the audio in volume level.
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.

Return values:

None

Definition at line 709 of file stm32l152d_eval_audio.c.

void BSP_AUDIO_IN_HalfTransfer_CallBack

(

void

)

Manages the DMA Half Transfer complete event.

Return values:

None

Definition at line 698 of file stm32l152d_eval_audio.c.

Referenced by HAL_ADC_ConvHalfCpltCallback().

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

Initialize wave recording.

Parameters:

AudioFreq	Audio frequency acquisition. Note: On STM32L1 evaluation board, the microphone acquisition is done through an analong amplifier with a band-pass filter centered at 32kHz. Therefore, this parameter value should be set at maximum to 32kHz (value "32000").
BitRes	Audio frequency to be configured for the I2S peripheral. Note: On STM32L1 evaluation board, this parameter is not used, but kept as parameter for compatibility with other STM32 BSP drivers.
ChnlNbr	Audio frequency to be configured for the I2S peripheral. Note: On STM32L1 evaluation board, this parameter is not used, but kept as parameter for compatibility with other STM32 BSP drivers.

Return values:

AUDIO_OK

if correct communication, else wrong communication

Definition at line 478 of file stm32l152d_eval_audio.c.

References ADCx_MspInit(), AUDIO_ERROR, AUDIO_IN_ADC_CHANNEL, AUDIO_OK, hAudioInAdc, hAudioInConfigAdc, hAudioInOpamp, hAudioInTim3, OPAMPx_MspInit(), and TIMx_Base_MspInit().

uint8_t BSP_AUDIO_IN_Pause

(

void

)

This function Pauses the audio file stream.

Return values:

AUDIO_OK

if correct communication, else wrong communication

Definition at line 637 of file stm32l152d_eval_audio.c.

References AUDIO_ERROR, AUDIO_OK, and hAudioInTim3.

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 578 of file stm32l152d_eval_audio.c.

References AUDIO_ERROR, AUDIO_OK, hAudioInAdc, and hAudioInTim3.

uint8_t BSP_AUDIO_IN_Resume

(

void

)

This function Resumes the audio file stream.

Return values:

AUDIO_OK

if correct communication, else wrong communication

Definition at line 655 of file stm32l152d_eval_audio.c.

References AUDIO_ERROR, AUDIO_OK, and hAudioInTim3.

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 675 of file stm32l152d_eval_audio.c.

References AUDIO_OK, and AudioInVolume.

uint8_t BSP_AUDIO_IN_Stop

(

void

)

Stop audio recording.

Return values:

None

Definition at line 608 of file stm32l152d_eval_audio.c.

References AUDIO_ERROR, AUDIO_OK, hAudioInAdc, hAudioInOpamp, and hAudioInTim3.

void BSP_AUDIO_IN_TransferComplete_CallBack

(

void

)

User callback when record buffer is filled.

Return values:

None

Definition at line 687 of file stm32l152d_eval_audio.c.

Referenced by HAL_ADC_ConvCpltCallback().