stm32f4_discovery_audio.c File Reference

This file provides the Audio driver for the STM32F4-Discovery board.
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#include "stm32f4_discovery_audio.h"

Include dependency graph for stm32f4_discovery_audio.c:

Go to the source code of this file.

Functions
__weak void	BSP_AUDIO_IN_ClockConfig (I2S_HandleTypeDef *hi2s, uint32_t AudioFreq, void *Params)
	Audio In Clock Config. More...
__weak void	BSP_AUDIO_IN_Error_Callback (void)
	Audio IN Error callback function. More...
__weak void	BSP_AUDIO_IN_HalfTransfer_CallBack (void)
	Manages the DMA Half Transfer complete event. More...
uint8_t	BSP_AUDIO_IN_Init (uint32_t AudioFreq, uint32_t BitRes, uint32_t ChnlNbr)
	Initializes wave recording. More...
__weak void	BSP_AUDIO_IN_MspDeInit (I2S_HandleTypeDef *hi2s, void *Params)
	DeInitializes BSP_AUDIO_IN MSP. More...
__weak void	BSP_AUDIO_IN_MspInit (I2S_HandleTypeDef *hi2s, void *Params)
	BSP AUDIO IN MSP Init. More...
uint8_t	BSP_AUDIO_IN_Pause (void)
	Pauses the audio file stream. More...
uint8_t	BSP_AUDIO_IN_PDMToPCM (uint16_t *PDMBuf, uint16_t *PCMBuf)
	Converts audio format from PDM to PCM. More...
uint8_t	BSP_AUDIO_IN_Record (uint16_t *pbuf, uint32_t size)
	Starts audio recording. More...
uint8_t	BSP_AUDIO_IN_Resume (void)
	Resumes the audio file stream. More...
uint8_t	BSP_AUDIO_IN_SetVolume (uint8_t Volume)
	Controls the audio in volume level. More...
uint8_t	BSP_AUDIO_IN_Stop (void)
	Stops audio recording. More...
__weak void	BSP_AUDIO_IN_TransferComplete_CallBack (void)
	User callback when record buffer is filled. More...
void	BSP_AUDIO_OUT_ChangeBuffer (uint16_t *pData, uint16_t Size)
	Sends n-Bytes on the I2S interface. More...
__weak void	BSP_AUDIO_OUT_ClockConfig (I2S_HandleTypeDef *hi2s, uint32_t AudioFreq, void *Params)
	Clock Config. More...
__weak void	BSP_AUDIO_OUT_Error_CallBack (void)
	Manages the DMA FIFO error event. More...
__weak void	BSP_AUDIO_OUT_HalfTransfer_CallBack (void)
	Manages the DMA Half Transfer complete event. More...
uint8_t	BSP_AUDIO_OUT_Init (uint16_t OutputDevice, uint8_t Volume, uint32_t AudioFreq)
	Configures the audio peripherals. More...
__weak void	BSP_AUDIO_OUT_MspDeInit (I2S_HandleTypeDef *hi2s, void *Params)
	De-Initializes BSP_AUDIO_OUT MSP. More...
__weak void	BSP_AUDIO_OUT_MspInit (I2S_HandleTypeDef *hi2s, void *Params)
	AUDIO OUT I2S MSP Init. More...
uint8_t	BSP_AUDIO_OUT_Pause (void)
	Pauses the audio file stream. In case of using DMA, the DMA Pause feature is used. WARNING: When calling BSP_AUDIO_OUT_Pause() function for pause, only the BSP_AUDIO_OUT_Resume() function should be called for resume (use of BSP_AUDIO_OUT_Play() function for resume could lead to unexpected behavior). More...
uint8_t	BSP_AUDIO_OUT_Play (uint16_t *pBuffer, uint32_t Size)
	Starts playing audio stream from a data buffer for a determined size. More...
uint8_t	BSP_AUDIO_OUT_Resume (void)
	Resumes the audio file streaming. WARNING: 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). More...
void	BSP_AUDIO_OUT_SetFrequency (uint32_t AudioFreq)
	Update the audio frequency. More...
uint8_t	BSP_AUDIO_OUT_SetMute (uint32_t Cmd)
	Enables or disables the MUTE mode by software. More...
uint8_t	BSP_AUDIO_OUT_SetOutputMode (uint8_t Output)
	Switch dynamically (while audio file is played) the output target (speaker or headphone). More...
uint8_t	BSP_AUDIO_OUT_SetVolume (uint8_t Volume)
	Controls the current audio volume level. More...
uint8_t	BSP_AUDIO_OUT_Stop (uint32_t Option)
	Stops audio playing and Power down the Audio Codec. More...
__weak void	BSP_AUDIO_OUT_TransferComplete_CallBack (void)
	Manages the DMA full Transfer complete event. More...
void	HAL_I2S_ErrorCallback (I2S_HandleTypeDef *hi2s)
	I2S error callbacks. More...
void	HAL_I2S_RxCpltCallback (I2S_HandleTypeDef *hi2s)
	Rx Transfer completed callbacks. More...
void	HAL_I2S_RxHalfCpltCallback (I2S_HandleTypeDef *hi2s)
	Rx Half Transfer completed callbacks. More...
void	HAL_I2S_TxCpltCallback (I2S_HandleTypeDef *hi2s)
	Tx Transfer completed callbacks. More...
void	HAL_I2S_TxHalfCpltCallback (I2S_HandleTypeDef *hi2s)
	Tx Half Transfer completed callbacks. More...
static uint8_t	I2S2_Init (uint32_t AudioFreq)
	Initializes the Audio Codec audio interface (I2S) More...
static uint8_t	I2S3_Init (uint32_t AudioFreq)
	Initializes the Audio Codec audio interface (I2S). More...
static void	PDMDecoder_Init (uint32_t AudioFreq, uint32_t ChnlNbrIn, uint32_t ChnlNbrOut)
	Initializes the PDM library. More...

Variables
__IO uint16_t	AudioInVolume = DEFAULT_AUDIO_IN_VOLUME
I2S_HandleTypeDef	hAudioInI2s
I2S_HandleTypeDef	hAudioOutI2s
const uint32_t	I2SFreq [8] = {8000, 11025, 16000, 22050, 32000, 44100, 48000, 96000}
const uint32_t	I2SPLLN [8] = {256, 429, 213, 429, 426, 271, 258, 344}
const uint32_t	I2SPLLR [8] = {5, 4, 4, 4, 4, 6, 3, 1}
static AUDIO_DrvTypeDef *	pAudioDrv
PDM_Filter_Config_t	PDM_FilterConfig [2]
PDM_Filter_Handler_t	PDM_FilterHandler [2]

Detailed Description

This file provides the Audio driver for the STM32F4-Discovery 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 stm32f4_discovery_audio.c.