Private Functions

Functions
static void	CODEC_Reset (void)
	Resets the audio codec.
static void	SAIx_MspInit (void)
	Initializes SAI MSP.
static void	SAIx_Init (uint32_t AudioFreq)
	Initializes the Audio Codec audio interface (SAI).
static void	DFSDMx_ChannelMspInit (DFSDM_Channel_HandleTypeDef *hdfsdm_channel)
	Initializes the DFSDM channel MSP.
static void	DFSDMx_FilterMspInit (DFSDM_Filter_HandleTypeDef *hdfsdm_filter)
	Initializes the DFSDM filter MSP.
static void	DFSDMx_ChannelMspDeInit (DFSDM_Channel_HandleTypeDef *hdfsdm_channel)
	DeInitializes the DFSDM channel MSP.
static void	DFSDMx_FilterMspDeInit (DFSDM_Filter_HandleTypeDef *hdfsdm_filter)
	DeInitializes the DFSDM filter MSP.
static uint8_t	DFSDMx_Init (uint32_t AudioFreq)
	Initializes the Digital Filter for Sigma-Delta Modulators interface (DFSDM).
static uint8_t	DFSDMx_DeInit (void)
	De-initializes the Digital Filter for Sigma-Delta Modulators interface (DFSDM).

---

Function Documentation

static void CODEC_Reset

(

void

)

[static]

Resets the audio codec.

It restores the default configuration of the codec (this function shall be called before initializing the codec).

Return values:

None

Definition at line 862 of file stm32l476g_eval_audio.c.

References audio_drv, and AUDIO_I2C_ADDRESS.

Referenced by BSP_AUDIO_OUT_Init().

static void DFSDMx_ChannelMspDeInit

(

DFSDM_Channel_HandleTypeDef *

hdfsdm_channel

)

[static]

DeInitializes the DFSDM channel MSP.

Parameters:

hdfsdm_channel

: DFSDM channel handle.

Return values:

None

Definition at line 1511 of file stm32l476g_eval_audio.c.

References AUDIO_DFSDMx_CKOUT_DMIC_DATIN_GPIO_PORT, AUDIO_DFSDMx_CKOUT_PIN, and AUDIO_DFSDMx_DMIC_DATIN_PIN.

Referenced by DFSDMx_DeInit().

static void DFSDMx_ChannelMspInit

(

DFSDM_Channel_HandleTypeDef *

hdfsdm_channel

)

[static]

Initializes the DFSDM channel MSP.

Parameters:

hdfsdm_channel

: DFSDM channel handle.

Return values:

None

Definition at line 1487 of file stm32l476g_eval_audio.c.

References AUDIO_DFSDMx_CKOUT_DMIC_DATIN_AF, AUDIO_DFSDMx_CKOUT_DMIC_DATIN_GPIO_CLK_ENABLE, AUDIO_DFSDMx_CKOUT_DMIC_DATIN_GPIO_PORT, AUDIO_DFSDMx_CKOUT_PIN, AUDIO_DFSDMx_CLK_ENABLE, and AUDIO_DFSDMx_DMIC_DATIN_PIN.

Referenced by DFSDMx_Init().

static uint8_t DFSDMx_DeInit

(

void

)

[static]

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

Return values:

AUDIO_OK

if correct communication, else wrong communication

Definition at line 1449 of file stm32l476g_eval_audio.c.

References AUDIO_ERROR, AUDIO_OK, DFSDMx_ChannelMspDeInit(), DFSDMx_FilterMspDeInit(), haudio_in_dfsdm_leftchannel, haudio_in_dfsdm_leftfilter, haudio_in_dfsdm_rightchannel, and haudio_in_dfsdm_rightfilter.

Referenced by BSP_AUDIO_IN_DeInit(), and BSP_AUDIO_IN_SetFrequency().

static void DFSDMx_FilterMspDeInit

(

DFSDM_Filter_HandleTypeDef *

hdfsdm_filter

)

[static]

DeInitializes the DFSDM filter MSP.

Parameters:

hdfsdm_filter

: DFSDM filter handle.

Return values:

None

Definition at line 1590 of file stm32l476g_eval_audio.c.

References AUDIO_DFSDMx_LEFT_FILTER, hdma_dfsdm_left, and hdma_dfsdm_right.

Referenced by DFSDMx_DeInit().

static void DFSDMx_FilterMspInit

(

DFSDM_Filter_HandleTypeDef *

hdfsdm_filter

)

[static]

Initializes the DFSDM filter MSP.

Parameters:

hdfsdm_filter

: DFSDM filter handle.

Return values:

None

Definition at line 1525 of file stm32l476g_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_DFSDMx_LEFT_FILTER, AUDIO_OUT_IRQ_PREPRIO, hdma_dfsdm_left, and hdma_dfsdm_right.

Referenced by DFSDMx_Init().

static uint8_t DFSDMx_Init

(

uint32_t

AudioFreq

)

[static]

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

Parameters:

AudioFreq,:

Audio frequency to be used to set correctly the DFSDM peripheral.

Return values:

AUDIO_OK

if correct communication, else wrong communication

Definition at line 1317 of file stm32l476g_eval_audio.c.

References AUDIO_DFSDMx_LEFT_FILTER, AUDIO_DFSDMx_RIGHT_FILTER, AUDIO_ERROR, AUDIO_OK, DFSDMClockDivider, DFSDMFilterOrder, DFSDMOverSampling, DFSDMRightBitShift, DFSDMx_ChannelMspInit(), DFSDMx_FilterMspInit(), haudio_in_dfsdm_leftchannel, haudio_in_dfsdm_leftfilter, haudio_in_dfsdm_rightchannel, and haudio_in_dfsdm_rightfilter.

Referenced by BSP_AUDIO_IN_Init(), and BSP_AUDIO_IN_SetFrequency().

static void SAIx_Init

(

uint32_t

AudioFreq

)

[static]

Initializes the Audio Codec audio interface (SAI).

Parameters:

AudioFreq,:

Audio frequency to be configured for the SAI peripheral.

Note:

The default SlotActive configuration is set to CODEC_AUDIOFRAME_SLOT_0123 and user can update this configuration using

Return values:

None

Definition at line 802 of file stm32l476g_eval_audio.c.

References AUDIO_SAIx, CODEC_AUDIOFRAME_SLOT_0123, haudio_out_sai, SAIClockDivider, and SAIx_MspInit().

Referenced by BSP_AUDIO_OUT_Init().

static void SAIx_MspInit

(

void

)

[static]

Initializes SAI MSP.

Return values:

None

Definition at line 743 of file stm32l476g_eval_audio.c.

References AUDIO_OUT_IRQ_PREPRIO, AUDIO_SAIx, AUDIO_SAIx_CLK_ENABLE, AUDIO_SAIx_DMAx_CHANNEL, AUDIO_SAIx_DMAx_CLK_ENABLE, AUDIO_SAIx_DMAx_IRQ, AUDIO_SAIx_DMAx_MEM_DATA_SIZE, AUDIO_SAIx_DMAx_PERIPH_DATA_SIZE, AUDIO_SAIx_FSB_PIN, AUDIO_SAIx_MCKB_PIN, AUDIO_SAIx_MCKB_SCKB_SDB_FSB_AF, AUDIO_SAIx_MCKB_SCKB_SDB_FSB_ENABLE, AUDIO_SAIx_MCKB_SCKB_SDB_FSB_GPIO_PORT, AUDIO_SAIx_SCKB_PIN, AUDIO_SAIx_SDB_PIN, and haudio_out_sai.

Referenced by SAIx_Init().