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STM32CubeF1/Projects/STM3210E_EVAL/Examples/BSP/Src/audio_play.c

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/**
******************************************************************************
* @file BSP/Src/audio_play.c
* @author MCD Application Team
* @brief This example code shows how to use AUDIO features for the play.
******************************************************************************
* @attention
*
* Copyright (c) 2016 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"
/** @addtogroup STM32F1xx_HAL_Examples
* @{
*/
/** @addtogroup BSP
* @{
*/
/* Private typedef -----------------------------------------------------------*/
typedef struct
{
uint32_t ChunkID; /* 0 */
uint32_t FileSize; /* 4 */
uint32_t FileFormat; /* 8 */
uint32_t SubChunk1ID; /* 12 */
uint32_t SubChunk1Size; /* 16*/
uint16_t AudioFormat; /* 20 */
uint16_t NbrChannels; /* 22 */
uint32_t SampleRate; /* 24 */
uint32_t ByteRate; /* 28 */
uint16_t BlockAlign; /* 32 */
uint16_t BitPerSample; /* 34 */
uint32_t SubChunk2ID; /* 36 */
uint32_t SubChunk2Size; /* 40 */
}WAVE_FormatTypeDef;
/* Private define ------------------------------------------------------------*/
/* 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_FILE_ADDRESS 0x08016800 /* Audio file address */
#define AUDIO_FILE_SIZE 0x2D000
/* Offset relative to Audio file header size (wave format) */
#define AUDIO_START_ADDRESS 58
/* Audio sampling frequency range to check integrity of audio file Wave data */
/* (unit: Hz). */
#define SAMPLE_RATE_MIN 8000
#define SAMPLE_RATE_MAX 96000
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
extern __IO uint8_t UserPressButton;
extern __IO uint32_t PauseResumeStatus;
extern __IO uint8_t UserOutputMode;
uint8_t UserOutputModePreviousState = OUTPUT_DEVICE_BOTH;
/* Variables used in normal mode to manage audio file during DMA transfer*/
uint32_t AudioTotalSize = 0xFFFF; /* This variable holds the total size of the audio file */
uint32_t AudioRemSize = 0xFFFF; /* This variable holds the remaining data in audio file */
uint16_t *CurrentPos ; /* This variable holds the current position of audio pointer */
extern __IO uint8_t volume;
extern __IO uint8_t VolumeChange;
/* Private function prototypes -----------------------------------------------*/
static void AudioPlay_SetHint(void);
static void AudioPlay_DisplayInfos(WAVE_FormatTypeDef * format);
/* 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 AudioPlay_demo(void)
{
WAVE_FormatTypeDef *waveformat = NULL;
uint8_t Volume_string[20] = {0};
AudioPlay_SetHint();
/* Configuration of the EXTI for the joystick SEL push button for pause/resume */
/* UP/DOWN push buttons for change the volume */
BSP_JOY_Init(JOY_MODE_EXTI);
/* Retrieve Wave Sample rate */
waveformat = (WAVE_FormatTypeDef*) AUDIO_FILE_ADDRESS;
/* Check waveformat validity */
/* In case of audio file pre-loaded into Flash memory, to check audio data */
/* integrity. */
if ((waveformat->SampleRate < SAMPLE_RATE_MIN) || (waveformat->SampleRate > SAMPLE_RATE_MAX))
{
BSP_LCD_SetTextColor(LCD_COLOR_RED);
BSP_LCD_DisplayStringAt(0, 130, (uint8_t*)"Audio file not valid", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 145, (uint8_t*)"Check audio data integrity", CENTER_MODE);
Error_Handler();
}
/* Display audio file Wave parameters */
AudioPlay_DisplayInfos(waveformat);
/* Initialize Audio Device */
if(BSP_AUDIO_OUT_Init(OUTPUT_DEVICE_BOTH, volume, waveformat->SampleRate) != 0)
{
BSP_LCD_SetTextColor(LCD_COLOR_RED);
BSP_LCD_DisplayStringAt(0, 130, (uint8_t*)"Initialization problem", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 145, (uint8_t*)"Audio Codec not detected", CENTER_MODE);
Error_Handler();
}
/* Set the total number of data to be played */
AudioTotalSize = (AUDIO_FILE_SIZE - AUDIO_START_ADDRESS) / 2;
/* Set the current audio pointer position */
CurrentPos = (uint16_t *)(AUDIO_FILE_ADDRESS);
/* Initialize Volume */
if(BSP_AUDIO_OUT_SetVolume(volume) != 0)
{
Error_Handler();
}
/* Start the audio player */
if(BSP_AUDIO_OUT_Play(CurrentPos, DMA_MAX(AudioTotalSize)) != 0)
{
Error_Handler();
}
/* Turn ON LED green: start of Audio file play */
BSP_LED_On(LED_GREEN);
/* Update the remaining number of data to be played */
AudioRemSize = AudioTotalSize - DMA_MAX(AudioTotalSize);
/* Update the current audio pointer position */
CurrentPos += DMA_MAX(AudioTotalSize);
BSP_LCD_DisplayStringAt(20, BSP_LCD_GetYSize()-30, (uint8_t *)"Playback on-going", LEFT_MODE);
sprintf((char *) Volume_string, " Volume : %d%% ", volume);
BSP_LCD_DisplayStringAt(20, BSP_LCD_GetYSize()-30, Volume_string, RIGHT_MODE);
/* Infinite loop */
while(!CheckForUserInput())
{
if (PauseResumeStatus == PAUSE_STATUS)
{
/* Turn ON LED orange: Audio play in pause */
BSP_LED_On(LED_ORANGE);
/* Pause playing */
if(BSP_AUDIO_OUT_Pause() != 0)
{
Error_Handler();
}
BSP_LCD_DisplayStringAt(20, BSP_LCD_GetYSize()-30, (uint8_t *)"Playback paused ", LEFT_MODE);
PauseResumeStatus = IDLE_STATUS;
}
else if (PauseResumeStatus == RESUME_STATUS)
{
/* Turn OFF LED orange: Audio play running */
BSP_LED_Off(LED_ORANGE);
/* Resume playing */
if(BSP_AUDIO_OUT_Resume() != 0)
{
Error_Handler();
}
BSP_LCD_DisplayStringAt(20, BSP_LCD_GetYSize()-30, (uint8_t *)"Playback on-going", LEFT_MODE);
PauseResumeStatus = IDLE_STATUS;
}
if (VolumeChange != 0)
{
VolumeChange = 0;
if(BSP_AUDIO_OUT_SetVolume(volume) != 0)
{
Error_Handler();
}
sprintf((char *) Volume_string, " Volume : %d%% ", volume);
BSP_LCD_DisplayStringAt(20, BSP_LCD_GetYSize()-30, Volume_string, RIGHT_MODE);
}
if (UserOutputMode != UserOutputModePreviousState)
{
/* Change audio output */
BSP_AUDIO_OUT_SetOutputMode(UserOutputMode);
UserOutputModePreviousState = UserOutputMode;
}
}
/* Reset the EXTI configuration for Joystick SEL, UP and DOWN push buttons */
/* Configuration of the joystick in GPIO mode and no more EXTI */
BSP_PB_Init(BUTTON_SEL, BUTTON_MODE_GPIO);
BSP_PB_Init(BUTTON_UP, BUTTON_MODE_GPIO);
BSP_PB_Init(BUTTON_DOWN, BUTTON_MODE_GPIO);
/* Stop Player before close Test */
if (BSP_AUDIO_OUT_Stop(CODEC_PDWN_SW) != AUDIO_OK)
{
/* Audio Stop error */
Error_Handler();
}
else
{
/* Turn OFF LED green: stop of Audio file play */
BSP_LED_Off(LED_GREEN);
BSP_LED_Off(LED_ORANGE);
}
}
/**
* @brief Display audio play demo hint
* @param None
* @retval None
*/
static void AudioPlay_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(), 80);
BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
BSP_LCD_SetBackColor(LCD_COLOR_BLUE);
BSP_LCD_SetFont(&Font24);
BSP_LCD_DisplayStringAt(0, 0, (uint8_t *)"Audio Play", CENTER_MODE);
BSP_LCD_SetFont(&Font12);
BSP_LCD_DisplayStringAt(0, 30, (uint8_t *)"Press Key push-button to stop play", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 45, (uint8_t *)"Press SEL to pause/resume playback", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 60, (uint8_t *)"Press UP/DOWN to change Volume", CENTER_MODE);
/* Set the LCD Text Color */
BSP_LCD_SetTextColor(LCD_COLOR_BLUE);
BSP_LCD_DrawRect(10, 90, BSP_LCD_GetXSize() - 20, BSP_LCD_GetYSize()- 100);
BSP_LCD_DrawRect(11, 91, BSP_LCD_GetXSize() - 22, BSP_LCD_GetYSize()- 102);
BSP_LCD_SetTextColor(LCD_COLOR_BLACK);
BSP_LCD_SetBackColor(LCD_COLOR_WHITE);
}
/**
* @brief Display audio play demo hint
* @param format : structure containing information of the file
* @retval None
*/
static void AudioPlay_DisplayInfos(WAVE_FormatTypeDef * format)
{
uint8_t string[50] = {0};
sprintf((char *) string, "Sampling frequency : %ld Hz", format->SampleRate);
BSP_LCD_DisplayStringAt(20, 100, string, CENTER_MODE);
if (format->NbrChannels == 2)
{
sprintf((char *) string, "Format : %d bits stereo", format->BitPerSample);
BSP_LCD_DisplayStringAt(20, 115, string, CENTER_MODE);
}
else if (format->NbrChannels == 1)
{
sprintf((char *) string, "Format : %d bits mono", format->BitPerSample);
BSP_LCD_DisplayStringAt(20, 115, string, CENTER_MODE);
}
/* How to use Joystick for change speaker */
sprintf((char *) string, "Joystick Right for speaker only");
BSP_LCD_DisplayStringAt(20, 145, string, CENTER_MODE);
sprintf((char *) string, "Joystick Left for headset only");
BSP_LCD_DisplayStringAt(20, 160, string, CENTER_MODE);
}
/*--------------------------------
Callbacks implementation:
The callbacks prototypes are defined in the stm3210e_eval_audio.h file
and their implementation should be done in the user code if they are needed.
Below some examples of callback implementations.
--------------------------------------------------------*/
/**
* @brief Calculates the remaining file size and new position of the pointer.
* @param None
* @retval None
*/
void BSP_AUDIO_OUT_TransferComplete_CallBack()
{
uint32_t replay = 0;
if (AudioRemSize > 0)
{
/* Replay from the current position */
BSP_AUDIO_OUT_ChangeBuffer((uint16_t*)CurrentPos, DMA_MAX(AudioRemSize));
/* Update the current pointer position */
CurrentPos += DMA_MAX(AudioRemSize);
/* Update the remaining number of data to be played */
AudioRemSize -= DMA_MAX(AudioRemSize);
}
else
{
/* Request to replay audio file from beginning */
replay = 1;
}
/* Audio sample used for play */
if(replay == 1)
{
/* Replay from the beginning */
/* Set the current audio pointer position */
CurrentPos = (uint16_t *)(AUDIO_FILE_ADDRESS);
/* Replay from the beginning */
if (BSP_AUDIO_OUT_Play(CurrentPos,DMA_MAX(AudioTotalSize)) != 0)
{
Error_Handler();
}
/* Toggle Green Led, each time a replay is requested */
BSP_LED_Toggle(LED_GREEN);
/* Update the remaining number of data to be played */
AudioRemSize = AudioTotalSize - DMA_MAX(AudioTotalSize);
/* Update the current audio pointer position */
CurrentPos += DMA_MAX(AudioTotalSize);
}
}
/**
* @brief Manages the DMA FIFO error interrupt.
* @param None
* @retval None
*/
void BSP_AUDIO_OUT_Error_CallBack(void)
{
/* Stop the program with an infinite loop */
Error_Handler();
}
/**
* @}
*/
/**
* @}
*/
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