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/**
******************************************************************************
* @file BSP/Src/audio.c
* @author MCD Application Team
* @brief This example code shows how to use the audio headphone microphone feature
* in the stm32412g_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 <stdio.h>
#include "string.h"
/** @addtogroup STM32F4xx_HAL_Examples
* @{
*/
/** @addtogroup BSP
* @{
*/
/* Private typedef -----------------------------------------------------------*/
typedef enum
{
BUFFER_OFFSET_NONE = 0,
BUFFER_OFFSET_HALF = 1,
BUFFER_OFFSET_FULL = 2,
}BUFFER_StateTypeDef;
extern AUDIO_ErrorTypeDef AUDIO_Start(uint32_t audio_start_address, uint32_t audio_file_size);
#define AUDIO_BLOCK_SIZE ((uint32_t)0xFFFE)
#define HEADBAND_HEIGHT 64
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
uint16_t internal_buffer[AUDIO_BLOCK_SIZE];
/* Global variables ---------------------------------------------------------*/
__IO uint32_t audio_rec_buffer_state;
/* Private function prototypes -----------------------------------------------*/
static void AudioRec_SetHint(void);
/* Private functions ---------------------------------------------------------*/
/**
* @brief Audio Play demo
* @param None
* @retval None
*/
void AudioRecAnalog_demo (void)
{
AudioRec_SetHint();
/* Initialize Audio Recorder */
if (BSP_AUDIO_IN_InitEx(INPUT_DEVICE_ANALOG_MIC, DEFAULT_AUDIO_IN_FREQ, DEFAULT_AUDIO_IN_BIT_RESOLUTION, DEFAULT_AUDIO_IN_CHANNEL_NBR) == AUDIO_OK)
{
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
{
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);
}
audio_rec_buffer_state = BUFFER_OFFSET_NONE;
/* 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 */
BSP_AUDIO_IN_Record(internal_buffer, AUDIO_BLOCK_SIZE);
/* Wait end of one block recording */
while((audio_rec_buffer_state & BUFFER_OFFSET_FULL) != BUFFER_OFFSET_FULL);
/* Stop recorder */
BSP_AUDIO_IN_Stop();
BSP_LCD_SetBackColor(LCD_COLOR_WHITE);
BSP_LCD_SetTextColor(LCD_COLOR_BLUE);
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 65, (uint8_t *)"RECORDING DONE", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 50, (uint8_t *)"START PLAYBACK...", CENTER_MODE);
/* -----------Start Playback -------------- */
/* Initialize audio IN at REC_FREQ*/
BSP_AUDIO_OUT_Init(OUTPUT_DEVICE_HEADPHONE, 90, DEFAULT_AUDIO_IN_FREQ);
/* Play the recorded buffer*/
AUDIO_Start((uint32_t)(&internal_buffer[0]), AUDIO_BLOCK_SIZE * 2); /* Use Audio play demo to playback sound */
BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize() - 35, (uint8_t *)"PLAYBACK DONE", CENTER_MODE);
while (1)
{
/* IMPORTANT: AUDIO_Process() should be called within a periodic process */
AUDIO_Process();
if (CheckForUserInput() > 0)
{
/* Stop Player before close Test */
BSP_AUDIO_OUT_Stop(CODEC_PDWN_SW);
BSP_AUDIO_OUT_DeInit();
BSP_AUDIO_IN_DeInit();
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(), HEADBAND_HEIGHT);
BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
BSP_LCD_SetBackColor(LCD_COLOR_BLUE);
BSP_LCD_SetFont(&Font16);
BSP_LCD_DisplayStringAt(0, 1, (uint8_t *)"AUDIO REC ANALOG", CENTER_MODE);
BSP_LCD_SetFont(&Font12);
BSP_LCD_DisplayStringAt(0, 20, (uint8_t *)"Record audio from analog", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 35, (uint8_t *)"microphone and play", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 50, (uint8_t *)"Press BUTTON for next", CENTER_MODE);
}
/*------------------------------------------------------------------------------
Callbacks implementation:
the callbacks API are defined __weak in the stm32746g_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)
{
audio_rec_buffer_state |= BUFFER_OFFSET_FULL;
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 *)" DMA ERROR ", CENTER_MODE);
/* Stop the program with an infinite loop */
while (BSP_PB_GetState(BUTTON_WAKEUP) != RESET)
{
return;
}
/* could also generate a system reset to recover from the error */
/* .... */
}
/**
* @}
*/
/**
* @}
*/
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