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/**
******************************************************************************
* @file BSP/Src/audio_record.c
* @author MCD Application Team
* @brief This example code shows how to use AUDIO features for the record.
******************************************************************************
* @attention
*
* Copyright (c) 2017 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "audio_record.h"
#include "string.h"
/** @addtogroup STM32F4xx_HAL_Examples
* @{
*/
/** @addtogroup BSP
* @{
*/
/* Private typedef -----------------------------------------------------------*/
#define AUDIO_BUFFER_SIZE 8192
typedef struct {
int32_t offset;
uint32_t fptr;
}Audio_BufferTypeDef;
typedef enum
{
BUFFER_OFFSET_NONE = 0,
BUFFER_OFFSET_HALF,
BUFFER_OFFSET_FULL,
}BUFFER_StateTypeDef;
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
uint8_t pHeaderBuff[44];
uint16_t WrBuffer[WR_BUFFER_SIZE];
static uint16_t RecBuf[2*PCM_OUT_SIZE];
static uint16_t InternalBuffer[INTERNAL_BUFF_SIZE];
__IO uint32_t ITCounter = 0;
Audio_BufferTypeDef BufferCtl;
/* Temporary data sample */
__IO uint32_t AUDIODataReady = 0, AUDIOBuffOffset = 0;
/* Variable used to replay audio sample (from play or record test)*/
extern uint32_t AudioTest;
/* Variable used for play in infinite loop */
extern __IO uint8_t UserPressButton;
/* Variables used in norma mode to manage audio file during DMA transfer */
extern uint32_t AudioTotalSize; /* This variable holds the total size of the audio file */
extern uint32_t AudioRemSize; /* This variable holds the remaining data in audio file */
extern uint16_t *CurrentPos; /* This variable holds the current position of audio pointer */
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/**
* @brief Test Audio Hardware.
* The main objective of this test is to check the hardware connection of the
* Audio peripheral.
* @param None
* @retval None
*/
void AudioRecord_Test(void)
{
BufferCtl.offset = BUFFER_OFFSET_NONE;
if(BSP_AUDIO_IN_Init(DEFAULT_AUDIO_IN_FREQ, DEFAULT_AUDIO_IN_BIT_RESOLUTION, DEFAULT_AUDIO_IN_CHANNEL_NBR) != AUDIO_OK)
{
/* Record Error */
Error_Handler();
}
/* Turn ON LED3: start record */
BSP_LED_On(LED3);
/* Start the record */
if (BSP_AUDIO_IN_Record((uint16_t*)&InternalBuffer[0], INTERNAL_BUFF_SIZE) != AUDIO_OK)
{
/* Record Error */
Error_Handler();
}
BufferCtl.fptr = 0;
AUDIODataReady = 0;
/* Wait for the data to be ready with PCM form */
while (AUDIODataReady != 2)
{
if(BufferCtl.offset == BUFFER_OFFSET_HALF)
{
/* PDM to PCM data convert */
BSP_AUDIO_IN_PDMToPCM((uint16_t*)&InternalBuffer[0], (uint16_t*)&RecBuf[0]);
/* Copy PCM data in internal buffer */
memcpy((uint16_t*)&WrBuffer[ITCounter * (PCM_OUT_SIZE*2)], RecBuf, PCM_OUT_SIZE*4);
BufferCtl.offset = BUFFER_OFFSET_NONE;
if(ITCounter == (WR_BUFFER_SIZE/(PCM_OUT_SIZE*4))-1)
{
AUDIODataReady = 1;
AUDIOBuffOffset = 0;
ITCounter++;
}
else if(ITCounter == (WR_BUFFER_SIZE/(PCM_OUT_SIZE*2))-1)
{
AUDIODataReady = 2;
AUDIOBuffOffset = WR_BUFFER_SIZE/2;
ITCounter = 0;
}
else
{
ITCounter++;
}
}
if(BufferCtl.offset == BUFFER_OFFSET_FULL)
{
/* PDM to PCM data convert */
BSP_AUDIO_IN_PDMToPCM((uint16_t*)&InternalBuffer[INTERNAL_BUFF_SIZE/2], (uint16_t*)&RecBuf[0]);
/* Copy PCM data in internal buffer */
memcpy((uint16_t*)&WrBuffer[ITCounter * (PCM_OUT_SIZE*2)], RecBuf, PCM_OUT_SIZE*4);
BufferCtl.offset = BUFFER_OFFSET_NONE;
if(ITCounter == (WR_BUFFER_SIZE/(PCM_OUT_SIZE*4))-1)
{
AUDIODataReady = 1;
AUDIOBuffOffset = 0;
ITCounter++;
}
else if(ITCounter == (WR_BUFFER_SIZE/(PCM_OUT_SIZE*2))-1)
{
AUDIODataReady = 2;
AUDIOBuffOffset = WR_BUFFER_SIZE/2;
ITCounter = 0;
}
else
{
ITCounter++;
}
}
};
/* Stop audio record */
if (BSP_AUDIO_IN_Stop() != AUDIO_OK)
{
/* Record Error */
Error_Handler();
}
/* Turn OFF LED3: record stopped */
BSP_LED_Off(LED3);
/* Turn ON LED6: play recorded file */
BSP_LED_On(LED6);
/* Play in the loop the recorded file */
/* Set variable to indicate play from record buffer */
AudioTest = 1;
/* Set variable used to stop player before starting */
UserPressButton = 0;
/* Initialize audio IN at REC_FREQ */
BSP_AUDIO_OUT_Init(OUTPUT_DEVICE_AUTO, 70, DEFAULT_AUDIO_IN_FREQ);
/* Set the total number of data to be played */
AudioTotalSize = AUDIODATA_SIZE * WR_BUFFER_SIZE;
/* Update the remaining number of data to be played */
AudioRemSize = 0;
/* Update the WrBuffer audio pointer position */
CurrentPos = (uint16_t *)(WrBuffer);
/* Play the recorded buffer */
BSP_AUDIO_OUT_Play(WrBuffer , AudioTotalSize);
while(!UserPressButton)
{
}
/* Stop Player before close Test */
if (BSP_AUDIO_OUT_Stop(CODEC_PDWN_SW) != AUDIO_OK)
{
/* Audio Stop error */
Error_Handler();
}
}
/**
* @brief Calculates the remaining file size and new position of the pointer.
* @param None
* @retval None
*/
void BSP_AUDIO_IN_TransferComplete_CallBack(void)
{
BufferCtl.offset = BUFFER_OFFSET_FULL;
}
/**
* @brief Manages the DMA Half Transfer complete interrupt.
* @param None
* @retval None
*/
void BSP_AUDIO_IN_HalfTransfer_CallBack(void)
{
BufferCtl.offset = BUFFER_OFFSET_HALF;
}
/**
* @brief Audio IN Error callback function
* @param pData
* @retval None
*/
void BSP_AUDIO_IN_Error_Callback(void)
{
/* Stop the program with an infinite loop */
Error_Handler();
}
/**
* @}
*/
/**
* @}
*/