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/**
******************************************************************************
* @file BSP/Src/audio_rec.c
* @author MCD Application Team
* @brief This example code shows how to use the audio feature in the
* stm32469i_discovery driver
******************************************************************************
* @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 "main.h"
#include <string.h>
/** @addtogroup STM32F4xx_HAL_Examples
* @{
*/
/** @addtogroup BSP
* @{
*/
/* Private define ------------------------------------------------------------*/
#define AUDIO_IN_PCM_BUFFER_SIZE (4*2304) /* buffer size in half-word */
#define AUDIO_IN_PDM_BUFFER_SIZE INTERNAL_BUFF_SIZE
/* Audio file size and start address are defined here since the audio file is
stored in Flash memory as a constant table of 16-bit data */
#define AUDIO_START_OFFSET_ADDRESS (0) /* Offset relative to audio file header size */
/* Private typedef -----------------------------------------------------------*/
typedef enum {
REC_NONE_STATE = 0,
REC_RESET_STATE,
RECORD_ONGOING,
REC_ERROR_STATE,
}AUDIOREC_StateTypeDef;
typedef enum {
BUFFER_EMPTY = 0,
BUFFER_FULL,
}WR_BUFFER_StateTypeDef;
typedef enum {
TRANSFER_NONE = 0,
TRANSFER_HALF,
TRANSFER_FULL
} IT_StateTypeDef;
typedef struct {
int32_t offset;
uint32_t rec_length;
uint32_t pcm_ptr;
WR_BUFFER_StateTypeDef wr_state;
IT_StateTypeDef it_state;
uint16_t pdm_buff[AUDIO_IN_PDM_BUFFER_SIZE];
uint16_t pcm_buff[AUDIO_IN_PCM_BUFFER_SIZE];
}Audio_BufferTypeDef;
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
Audio_BufferTypeDef buffer_ctl;
//static uint32_t uwVolume = 20;
static uint8_t AudioRec_State;
static uint32_t AudioRecFullBuff_addr;
static __IO uint16_t CurrentPosition;
#ifdef JOYSTICK
static JOYState_TypeDef JoyState = JOY_NONE;
#endif
/* Private function prototypes -----------------------------------------------*/
static void AudioRec_SetHint(void);
/* Private functions ---------------------------------------------------------*/
/**
* @brief Audio Play demo
* @param None
* @retval None
*/
void AudioRec_demo (void)
{
uint16_t NbRecord_done = 0;
uint8_t FreqStr[256] = {0};
AudioRec_State = REC_NONE_STATE;
buffer_ctl.rec_length = 0;
/* Initialize AudioRecFullBuff at the address of the audio_play reader */
AudioRecFullBuff_addr = AUDIO_REC_START_ADDR;
AudioRec_SetHint();
#ifdef JOYSTICK
/* Initialize Joystick */
if (BSP_JOY_Init(JOY_MODE_GPIO) != IO_OK)
{
BSP_LCD_SetBackColor(LCD_COLOR_WHITE);
BSP_LCD_SetTextColor(LCD_COLOR_RED);
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 95, (uint8_t *)"ERROR", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 80, (uint8_t *)"Joystick cannot be initialized", CENTER_MODE);
}
#endif
/* Initialize Audio Recorder */
if (BSP_AUDIO_IN_Init(DEFAULT_AUDIO_IN_FREQ, DEFAULT_AUDIO_IN_BIT_RESOLUTION, DEFAULT_AUDIO_IN_CHANNEL_NBR) == AUDIO_OK)
{
AudioRec_State = REC_RESET_STATE;
BSP_LCD_SetBackColor(LCD_COLOR_WHITE);
BSP_LCD_SetTextColor(LCD_COLOR_GREEN);
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 95, (uint8_t *)" AUDIO RECORD INIT OK ", CENTER_MODE);
}
else
{
AudioRec_State = REC_ERROR_STATE;
BSP_LCD_SetBackColor(LCD_COLOR_WHITE);
BSP_LCD_SetTextColor(LCD_COLOR_RED);
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 95, (uint8_t *)" AUDIO RECORD INIT FAIL", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 80, (uint8_t *)" Try to reset board ", CENTER_MODE);
}
/* Infinite loop */
while (buffer_ctl.rec_length < AUDIO_REC_TOTAL_SIZE)
{
BSP_LCD_SetBackColor(LCD_COLOR_WHITE);
BSP_LCD_SetTextColor(LCD_COLOR_BLUE);
if (buffer_ctl.it_state == TRANSFER_HALF)
{
/* PDM to PCM data convert */
BSP_AUDIO_IN_PDMToPCM((uint16_t*)&buffer_ctl.pdm_buff[0],
&buffer_ctl.pcm_buff[buffer_ctl.pcm_ptr]);
buffer_ctl.pcm_ptr+= AUDIO_IN_PDM_BUFFER_SIZE/4/2;
if(buffer_ctl.pcm_ptr == AUDIO_IN_PCM_BUFFER_SIZE/2)
{
buffer_ctl.wr_state = BUFFER_FULL;
buffer_ctl.offset = 0;
}
if(buffer_ctl.pcm_ptr >= AUDIO_IN_PCM_BUFFER_SIZE)
{
buffer_ctl.wr_state = BUFFER_FULL;
buffer_ctl.offset = AUDIO_IN_PCM_BUFFER_SIZE/2;
buffer_ctl.pcm_ptr = 0;
}
buffer_ctl.it_state = TRANSFER_NONE;
}
if (buffer_ctl.it_state == TRANSFER_FULL)
{
/* PDM to PCM data convert */
if (BSP_AUDIO_IN_PDMToPCM((uint16_t*)&buffer_ctl.pdm_buff[INTERNAL_BUFF_SIZE/2], &buffer_ctl.pcm_buff[buffer_ctl.pcm_ptr]) == 0)
{
buffer_ctl.pcm_ptr+= AUDIO_IN_PDM_BUFFER_SIZE/4/2;
if(buffer_ctl.pcm_ptr == AUDIO_IN_PCM_BUFFER_SIZE/2)
{
buffer_ctl.wr_state = BUFFER_FULL;
buffer_ctl.offset = 0;
}
if(buffer_ctl.pcm_ptr >= AUDIO_IN_PCM_BUFFER_SIZE)
{
buffer_ctl.wr_state = BUFFER_FULL;
buffer_ctl.offset = AUDIO_IN_PCM_BUFFER_SIZE/2;
buffer_ctl.pcm_ptr = 0;
}
}
buffer_ctl.it_state = TRANSFER_NONE;
NbRecord_done++;
}
/* PCM buffer is full, copy it into the record_file */
if (buffer_ctl.wr_state == BUFFER_FULL)
{
memcpy((uint32_t *)AudioRecFullBuff_addr, (uint8_t*)(buffer_ctl.pcm_buff + buffer_ctl.offset), AUDIO_IN_PCM_BUFFER_SIZE);
AudioRecFullBuff_addr += AUDIO_IN_PCM_BUFFER_SIZE;
buffer_ctl.rec_length += AUDIO_IN_PCM_BUFFER_SIZE;
buffer_ctl.wr_state = BUFFER_EMPTY;
}
#ifdef JOYSTICK
/* Get the Joystick State */
JoyState = BSP_JOY_GetState();
switch (JoyState)
{
case JOY_SEL:
#endif
if (AudioRec_State == REC_RESET_STATE)
{
/* Display the state on the screen */
BSP_LCD_SetBackColor(LCD_COLOR_WHITE);
BSP_LCD_SetTextColor(LCD_COLOR_BLUE);
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 80, (uint8_t *)" RECORDING... ", CENTER_MODE);
/* Start Recording */
buffer_ctl.rec_length = 0;
buffer_ctl.wr_state = BUFFER_EMPTY;
buffer_ctl.it_state = TRANSFER_NONE;
BSP_AUDIO_IN_Record((uint16_t*)&buffer_ctl.pdm_buff[0], INTERNAL_BUFF_SIZE);
AudioRec_State = RECORD_ONGOING;
}
#ifdef JOYSTICK
break;
default:
break;
}
#endif
if (CheckForUserInput() > 0)
{
/* Stop recorder and exit the test (go to next test) */
BSP_AUDIO_IN_Stop();
return;
}
}
/* Stop recorder once buffer_ctl.rec_length < AUDIO_REC_TOTAL_SIZE*/
BSP_AUDIO_IN_Stop();
BSP_LCD_SetBackColor(LCD_COLOR_WHITE);
BSP_LCD_SetTextColor(LCD_COLOR_BLUE);
sprintf((char*)FreqStr, "RECORDING DONE, %d frames, START PLAYBACK", NbRecord_done);
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 65, (uint8_t *)FreqStr, CENTER_MODE);
NbRecord_done = buffer_ctl.rec_length / (DEFAULT_AUDIO_IN_FREQ * DEFAULT_AUDIO_IN_CHANNEL_NBR * 2);
sprintf((char*)FreqStr, "Elapsed_time: %d frames", NbRecord_done);
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 45, (uint8_t *)FreqStr, CENTER_MODE);
/* -----------Start Playback -------------- */
/* Initialize audio IN at REC_FREQ*/
if(BSP_AUDIO_OUT_Init(OUTPUT_DEVICE_HEADPHONE, 95, DEFAULT_AUDIO_IN_FREQ/2) == 0)
{
BSP_LCD_SetBackColor(LCD_COLOR_WHITE);
BSP_LCD_SetTextColor(LCD_COLOR_GREEN);
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 95, (uint8_t *)" AUDIO CODEC OK ", CENTER_MODE);
}
else
{
BSP_LCD_SetBackColor(LCD_COLOR_WHITE);
BSP_LCD_SetTextColor(LCD_COLOR_RED);
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 95, (uint8_t *)" AUDIO CODEC FAIL ", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 80, (uint8_t *)" Try to reset board ", CENTER_MODE);
}
/* Play the recorded buffer*/
if(AUDIO_Play_Start((uint32_t *)AUDIO_REC_START_ADDR, (uint32_t)AUDIO_REC_TOTAL_SIZE) == 0)
{
BSP_LCD_SetBackColor(LCD_COLOR_WHITE);
BSP_LCD_SetTextColor(LCD_COLOR_GREEN);
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 95, (uint8_t *)" AUDIO PLAYBACK OK ", CENTER_MODE);
} else
{
BSP_LCD_SetBackColor(LCD_COLOR_WHITE);
BSP_LCD_SetTextColor(LCD_COLOR_RED);
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 95, (uint8_t *)" AUDIO PLAYBACK FAIL ", CENTER_MODE);
}
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 25, (uint8_t *)"PLAYBACK DONE", CENTER_MODE);
while (1)
{
/* Toggle LED4 */
BSP_LED_Toggle(LED4);
/* Insert 100 ms delay */
HAL_Delay(100);
if (CheckForUserInput() > 0)
{
/* Set LED4 */
BSP_LED_On(LED4);
/* Stop recorder */
BSP_AUDIO_IN_Stop();
/* Stop Player before close Test */
BSP_AUDIO_OUT_Stop(CODEC_PDWN_SW);
return;
}
}
}
/**
* @brief Display Audio Record demo hint
* @param None
* @retval None
*/
static void AudioRec_SetHint(void)
{
/* Clear the LCD */
BSP_LCD_Clear(LCD_COLOR_WHITE);
/* Set Audio Demo description */
BSP_LCD_SetTextColor(LCD_COLOR_BLUE);
BSP_LCD_FillRect(0, 0, BSP_LCD_GetXSize(), 90);
BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
BSP_LCD_SetBackColor(LCD_COLOR_BLUE);
BSP_LCD_SetFont(&Font24);
BSP_LCD_DisplayStringAt(0, 0, (uint8_t *)"AUDIO RECORD EXAMPLE", CENTER_MODE);
BSP_LCD_SetFont(&Font12);
BSP_LCD_DisplayStringAt(0, 30, (uint8_t *)"Press User button for next menu ", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 45, (uint8_t *)"Click on Joystick to start recording ", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 60, (uint8_t *)"Make sure jumpers are in the right state ", CENTER_MODE);
/* Set the LCD Text Color */
BSP_LCD_SetTextColor(LCD_COLOR_BLUE);
BSP_LCD_DrawRect(10, 100, BSP_LCD_GetXSize() - 20, BSP_LCD_GetYSize() - 110);
BSP_LCD_DrawRect(11, 101, BSP_LCD_GetXSize() - 22, BSP_LCD_GetYSize() - 112);
}
/*------------------------------------------------------------------------------
Callbacks implementation:
the callbacks API are defined __weak in the stm32469i_discovery_audio.c file
and their implementation should be done the user code if they are needed.
Below some examples of callback implementations.
----------------------------------------------------------------------------*/
/**
* @brief Manages the DMA Transfer complete interrupt.
* @param None
* @retval None
*/
void BSP_AUDIO_IN_TransferComplete_CallBack(void)
{
buffer_ctl.it_state = TRANSFER_FULL;
return;
}
/**
* @brief Manages the DMA Half Transfer complete interrupt.
* @param None
* @retval None
*/
void BSP_AUDIO_IN_HalfTransfer_CallBack(void)
{
buffer_ctl.it_state = TRANSFER_HALF;
return;
}
/**
* @brief Audio IN Error callback function.
* @param None
* @retval None
*/
void BSP_AUDIO_IN_Error_Callback(void)
{
/* This function is called when an Interrupt due to transfer error on or peripheral
error occurs. */
/* Display message on the LCD screen */
BSP_LCD_SetBackColor(LCD_COLOR_RED);
BSP_LCD_DisplayStringAt(0, LINE(14), (uint8_t *)"TRANSFER ERROR", CENTER_MODE);
/* Stop the program with an infinite loop */
while (BSP_PB_GetState(BUTTON_USER) != PB_RESET)
{
return;
}
/* could also generate a system reset to recover from the error */
/* .... */
}
/**
* @}
*/
/**
* @}
*/