stm32l4r9i_eval_audio.c File Reference

This file provides the Audio driver for the STM32L4R9I-EVAL evaluation board. More...

#include <string.h> #include "stm32l4r9i_eval_audio.h"

Go to the source code of this file.

Data Structures
struct	AUDIO_OUT_TypeDef
struct	AUDIO_IN_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	AUDIO_CODEC_Reset (void)
	Resets the audio codec.
static uint8_t	AUDIO_SAIx_Init (uint32_t AudioFreq, uint16_t OutputDevice)
	Initializes the Audio Codec audio interface (SAI).
static uint8_t	AUDIO_SAIx_DeInit (void)
	De-initializes the Audio Codec audio interface (SAI).
static uint8_t	AUDIO_DFSDMx_Init (uint32_t AudioFreq)
	Initializes the Digital Filter for Sigma-Delta Modulators interface (DFSDM).
static uint8_t	AUDIO_DFSDMx_DeInit (void)
	De-initializes the Digital Filter for Sigma-Delta Modulators interface (DFSDM).
static uint8_t	AUDIO_SAIPLLConfig (uint32_t Frequency)
	Configures the SAI PLL clock according to the required audio frequency.
uint8_t	BSP_AUDIO_OUT_Init (uint16_t OutputDevice, uint8_t Volume, uint32_t AudioFreq)
	Configures the audio 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 played) the output target (speaker or headphone).
uint8_t	BSP_AUDIO_OUT_SetFrequency (uint32_t AudioFreq)
	Update 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 wave recording.
uint8_t	BSP_AUDIO_IN_DeInit (void)
	De-Initializes microphone related peripherals.
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.
void	HAL_DFSDM_FilterErrorCallback (DFSDM_Filter_HandleTypeDef *hdfsdm_filter)
	Error 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.
void	BSP_AUDIO_IN_RegisterCallbacks (Audio_CallbackTypeDef ErrorCallback, Audio_CallbackTypeDef HalfTransferCallback, Audio_CallbackTypeDef TransferCompleteCallback)
	register user callback functions
void	HAL_SAI_MspInit (SAI_HandleTypeDef *hsai)
	SAI MSP Init.
void	HAL_SAI_MspDeInit (SAI_HandleTypeDef *hsai)
	SAI MSP De-init.
void	HAL_DFSDM_ChannelMspInit (DFSDM_Channel_HandleTypeDef *hdfsdm_channel)
	Initializes the DFSDM channel MSP.
void	HAL_DFSDM_ChannelMspDeInit (DFSDM_Channel_HandleTypeDef *hdfsdm_channel)
	DeInitializes the DFSDM channel MSP.
void	HAL_DFSDM_FilterMspInit (DFSDM_Filter_HandleTypeDef *hdfsdm_filter)
	Initializes the DFSDM filter MSP.
void	HAL_DFSDM_FilterMspDeInit (DFSDM_Filter_HandleTypeDef *hdfsdm_filter)
	DeInitializes the DFSDM filter MSP.
Variables
static AUDIO_OUT_TypeDef	hAudioOut = {0}
static AUDIO_IN_TypeDef	hAudioIn = {0}
static DMA_HandleTypeDef	hDmaSai
static uint32_t	DmaLeftRecHalfBuffCplt
static uint32_t	DmaLeftRecBuffCplt
static uint32_t	DmaRightRecHalfBuffCplt
static uint32_t	DmaRightRecBuffCplt
SAI_HandleTypeDef	BSP_AUDIO_hSai
DFSDM_Filter_HandleTypeDef	BSP_AUDIO_hDfsdmLeftFilter
DFSDM_Filter_HandleTypeDef	BSP_AUDIO_hDfsdmRightFilter

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Detailed Description

This file provides the Audio driver for the STM32L4R9I-EVAL evaluation board.

Author:

MCD Application Team

Attention:

© COPYRIGHT(c) 2017 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 stm32l4r9i_eval_audio.c.