stm32l476g_eval_audio.c File Reference

This file provides the Audio driver for the STM32L476G-EVAL evaluation board. More...

#include "stm32l476g_eval_audio.h"

Go to the source code of this file.

Data Structures
struct	AUDIOIN_TypeDef
Defines
#define	SAIClockDivider(__FREQUENCY__)
#define	DFSDMOverSampling(__FREQUENCY__)
#define	DFSDMClockDivider(__FREQUENCY__)
#define	DFSDMFilterOrder(__FREQUENCY__)
#define	DFSDMRightBitShift(__FREQUENCY__)
#define	SaturaLH(N, L, H)   (((N)<(L))?(L):(((N)>(H))?(H):(N)))
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).
uint8_t	BSP_AUDIO_OUT_Init (uint16_t OutputDevice, uint8_t Volume, uint32_t AudioFreq)
	Configures the audio peripherals.
uint8_t	BSP_AUDIO_OUT_Play (uint16_t *pBuffer, 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 played) the output target (speaker or headphone).
void	BSP_AUDIO_OUT_SetFrequency (uint32_t AudioFreq)
	Update the audio frequency.
void	BSP_AUDIO_OUT_SetAudioFrameSlot (uint32_t AudioFrameSlot)
	Updates the Audio frame slot configuration.
void	BSP_AUDIO_OUT_ChangeAudioConfig (uint32_t AudioOutOption)
	Changes the Audio Out Configuration.
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.
__weak void	BSP_AUDIO_OUT_TransferComplete_CallBack (void)
	Manages the DMA full Transfer complete event.
__weak void	BSP_AUDIO_OUT_HalfTransfer_CallBack (void)
	Manages the DMA Half Transfer complete event.
__weak void	BSP_AUDIO_OUT_Error_CallBack (void)
	Manages the DMA FIFO error event.
uint8_t	BSP_AUDIO_IN_Init (uint32_t AudioFreq, uint32_t BitRes, uint32_t ChnlNbr)
	Initializes wave recording.
void	BSP_AUDIO_IN_DeInit (void)
	DeInitializes the audio peripheral.
uint8_t	BSP_AUDIO_IN_Record (uint16_t *pbuf, uint32_t size)
	Starts audio recording.
uint8_t	BSP_AUDIO_IN_SetFrequency (uint32_t AudioFreq)
	Updates the audio frequency.
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.
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.
uint8_t	BSP_AUDIO_IN_SetVolume (uint8_t Volume)
	Controls the audio in volume level.
__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.
Variables
AUDIO_DrvTypeDef *	audio_drv
SAI_HandleTypeDef	haudio_out_sai
AUDIOIN_TypeDef	audio_in_context
DFSDM_Channel_HandleTypeDef	haudio_in_dfsdm_leftchannel
DFSDM_Channel_HandleTypeDef	haudio_in_dfsdm_rightchannel
DFSDM_Filter_HandleTypeDef	haudio_in_dfsdm_leftfilter
DFSDM_Filter_HandleTypeDef	haudio_in_dfsdm_rightfilter
DMA_HandleTypeDef	hdma_dfsdm_left
DMA_HandleTypeDef	hdma_dfsdm_right
int32_t	LeftRecBuff [INTERNAL_BUFF_SIZE]
int32_t	RightRecBuff [INTERNAL_BUFF_SIZE]
uint32_t	DmaLeftRecHalfBuffCplt = 0
uint32_t	DmaLeftRecBuffCplt = 0
uint32_t	DmaRightRecHalfBuffCplt = 0
uint32_t	DmaRightRecBuffCplt = 0
__IO uint32_t	AppBuffTrigger = 0
uint32_t __IO	AppBuffHalf = 0
uint16_t __IO	AudioInVolume = DEFAULT_AUDIO_IN_VOLUME

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Detailed Description

This file provides the Audio driver for the STM32L476G-EVAL evaluation board.

Author:

MCD Application Team

Version:

$VERSION$

Date:

$DATE$

Attention:

© COPYRIGHT(c) 2015 STMicroelectronics

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 3. Neither the name of STMicroelectronics nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Definition in file stm32l476g_eval_audio.c.