342 lines
11 KiB
C
342 lines
11 KiB
C
/**
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******************************************************************************
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* @file BSP/Src/audio_play.c
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* @author MCD Application Team
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* @brief This example code shows how to use AUDIO features for the play.
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******************************************************************************
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* @attention
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*
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* <h2><center>© Copyright (c) 2016 STMicroelectronics.
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* All rights reserved.</center></h2>
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*
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* This software component is licensed by ST under BSD 3-Clause license,
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* the "License"; You may not use this file except in compliance with the
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* License. You may obtain a copy of the License at:
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* opensource.org/licenses/BSD-3-Clause
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "main.h"
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/** @addtogroup STM32F1xx_HAL_Examples
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* @{
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*/
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/** @addtogroup BSP
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* @{
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*/
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/* Private typedef -----------------------------------------------------------*/
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typedef struct
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{
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uint32_t ChunkID; /* 0 */
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uint32_t FileSize; /* 4 */
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uint32_t FileFormat; /* 8 */
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uint32_t SubChunk1ID; /* 12 */
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uint32_t SubChunk1Size; /* 16*/
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uint16_t AudioFormat; /* 20 */
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uint16_t NbrChannels; /* 22 */
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uint32_t SampleRate; /* 24 */
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uint32_t ByteRate; /* 28 */
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uint16_t BlockAlign; /* 32 */
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uint16_t BitPerSample; /* 34 */
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uint32_t SubChunk2ID; /* 36 */
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uint32_t SubChunk2Size; /* 40 */
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}WAVE_FormatTypeDef;
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/* Private define ------------------------------------------------------------*/
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/* Audio file size and start address are defined here since the Audio file is
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stored in Flash memory as a constant table of 16-bit data */
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#define AUDIO_FILE_ADDRESS 0x08015000 /* Audio file address */
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#define AUDIO_FILE_SIZE (FLASH_BANK1_END - AUDIO_FILE_ADDRESS)
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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extern __IO uint8_t UserPressButton;
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extern __IO uint32_t PauseResumeStatus;
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extern __IO uint8_t UserOutputMode;
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uint8_t UserOutputModePreviousState = OUTPUT_DEVICE_AUTO;
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/* Variables used in norma mode to manage audio file during DMA transfer*/
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uint32_t AudioTotalSize = 0xFFFF; /* This variable holds the total size of the audio file */
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uint32_t AudioRemSize = 0xFFFF; /* This variable holds the remaining data in audio file */
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uint16_t *CurrentPos ; /* This variable holds the current position of audio pointer */
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extern __IO uint8_t volume;
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extern __IO uint8_t VolumeChange;
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/* Private function prototypes -----------------------------------------------*/
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static void AudioPlay_SetHint(void);
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static void AudioPlay_DisplayInfos(WAVE_FormatTypeDef * format);
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/* Private functions ---------------------------------------------------------*/
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/**
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* @brief Test Audio Hardware.
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* The main objective of this test is to check the hardware connection of the
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* Audio peripheral.
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* @param None
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* @retval None
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*/
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void AudioPlay_demo(void)
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{
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WAVE_FormatTypeDef *waveformat = NULL;
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uint8_t Volume_string[20] = {0};
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AudioPlay_SetHint();
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/* Configuration of the EXTI for the joystick SEL push button for pause/resume */
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/* UP/DOWN push buttons for change the volume */
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BSP_JOY_Init(JOY_MODE_EXTI);
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/* Retrieve Wave Sample rate*/
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waveformat = (WAVE_FormatTypeDef*) AUDIO_FILE_ADDRESS;
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AudioPlay_DisplayInfos(waveformat);
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/* Initialize Audio Device */
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if(BSP_AUDIO_OUT_Init(OUTPUT_DEVICE_AUTO, volume, waveformat->SampleRate) != 0)
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{
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BSP_LCD_SetTextColor(LCD_COLOR_RED);
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BSP_LCD_DisplayStringAt(0, 130, (uint8_t*)"Initialization problem", CENTER_MODE);
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BSP_LCD_DisplayStringAt(0, 145, (uint8_t*)"Audio Codec not detected", CENTER_MODE);
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Error_Handler();
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}
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/* Set the total number of data to be played */
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AudioTotalSize = (AUDIO_FILE_SIZE / 2);
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/* Set the current audio pointer position */
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CurrentPos = (uint16_t *)(AUDIO_FILE_ADDRESS);
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/* Initialize Volume */
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if(BSP_AUDIO_OUT_SetVolume(volume) != 0)
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{
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Error_Handler();
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}
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/* Start the audio player */
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if(BSP_AUDIO_OUT_Play(CurrentPos,DMA_MAX((AudioTotalSize))) != 0)
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{
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Error_Handler();
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}
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/* Turn ON LED green: start of Audio file play */
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BSP_LED_On(LED_GREEN);
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/* Update the remaining number of data to be played */
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AudioRemSize = AudioTotalSize - DMA_MAX(AudioTotalSize);
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/* Update the current audio pointer position */
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CurrentPos += DMA_MAX(AudioTotalSize);
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BSP_LCD_DisplayStringAt(20, BSP_LCD_GetYSize()-30, (uint8_t *)"Playback on-going", LEFT_MODE);
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sprintf((char *) Volume_string, " Volume : %d%% ", volume);
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BSP_LCD_DisplayStringAt(20, BSP_LCD_GetYSize()-30, Volume_string, RIGHT_MODE);
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/* Infinite loop */
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while(!CheckForUserInput())
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{
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if (PauseResumeStatus == PAUSE_STATUS)
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{
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/* Turn ON LED orange: Audio play in pause */
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BSP_LED_On(LED_ORANGE);
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/* Pause playing */
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if(BSP_AUDIO_OUT_Pause() != 0)
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{
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Error_Handler();
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}
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BSP_LCD_DisplayStringAt(20, BSP_LCD_GetYSize()-30, (uint8_t *)"Playback paused ", LEFT_MODE);
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PauseResumeStatus = IDLE_STATUS;
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}
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else if (PauseResumeStatus == RESUME_STATUS)
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{
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/* Turn OFF LED orange: Audio play running */
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BSP_LED_Off(LED_ORANGE);
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/* Resume playing */
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if(BSP_AUDIO_OUT_Resume() != 0)
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{
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Error_Handler();
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}
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BSP_LCD_DisplayStringAt(20, BSP_LCD_GetYSize()-30, (uint8_t *)"Playback on-going", LEFT_MODE);
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PauseResumeStatus = IDLE_STATUS;
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}
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if (VolumeChange != 0)
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{
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VolumeChange = 0;
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if(BSP_AUDIO_OUT_SetVolume(volume) != 0)
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{
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Error_Handler();
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}
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sprintf((char *) Volume_string, " Volume : %d%% ", volume);
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BSP_LCD_DisplayStringAt(20, BSP_LCD_GetYSize()-30, Volume_string, RIGHT_MODE);
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}
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if (UserOutputMode != UserOutputModePreviousState)
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{
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/* Change audio output */
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BSP_AUDIO_OUT_SetOutputMode(UserOutputMode);
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UserOutputModePreviousState = UserOutputMode;
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}
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}
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/* Reset the EXTI configuration for Joystick SEL, UP and DOWN push buttons */
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/* Configuration of the joystick in GPIO mode and no more EXTI */
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BSP_JOY_Init(JOY_MODE_GPIO);
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/* Stop Player before close Test */
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if (BSP_AUDIO_OUT_Stop(CODEC_PDWN_SW) != AUDIO_OK)
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{
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/* Audio Stop error */
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Error_Handler();
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}
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else
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{
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/* Turn OFF LED green: stop of Audio file play */
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BSP_LED_Off(LED_GREEN);
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BSP_LED_Off(LED_ORANGE);
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}
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}
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/**
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* @brief Display audio play demo hint
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* @param None
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* @retval None
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*/
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static void AudioPlay_SetHint(void)
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{
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/* Clear the LCD */
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BSP_LCD_Clear(LCD_COLOR_WHITE);
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/* Set Audio Demo description */
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BSP_LCD_SetTextColor(LCD_COLOR_BLUE);
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BSP_LCD_FillRect(0, 0, BSP_LCD_GetXSize(), 80);
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BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
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BSP_LCD_SetBackColor(LCD_COLOR_BLUE);
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BSP_LCD_SetFont(&Font24);
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BSP_LCD_DisplayStringAt(0, 0, (uint8_t *)"Audio Play", CENTER_MODE);
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BSP_LCD_SetFont(&Font12);
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BSP_LCD_DisplayStringAt(0, 30, (uint8_t *)"Press KEY to stop playback", CENTER_MODE);
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BSP_LCD_DisplayStringAt(0, 45, (uint8_t *)"Press SEL to pause/resume playback", CENTER_MODE);
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BSP_LCD_DisplayStringAt(0, 60, (uint8_t *)"Press UP/DOWN to change Volume", CENTER_MODE);
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/* Set the LCD Text Color */
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BSP_LCD_SetTextColor(LCD_COLOR_BLUE);
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BSP_LCD_DrawRect(10, 90, BSP_LCD_GetXSize() - 20, BSP_LCD_GetYSize()- 100);
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BSP_LCD_DrawRect(11, 91, BSP_LCD_GetXSize() - 22, BSP_LCD_GetYSize()- 102);
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BSP_LCD_SetTextColor(LCD_COLOR_BLACK);
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BSP_LCD_SetBackColor(LCD_COLOR_WHITE);
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}
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/**
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* @brief Display audio play demo hint
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* @param format : structure containing informations of the file
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* @retval None
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*/
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static void AudioPlay_DisplayInfos(WAVE_FormatTypeDef * format)
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{
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uint8_t string[50] = {0};
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sprintf((char *) string, "Sampling frequency : %ld Hz", format->SampleRate);
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BSP_LCD_DisplayStringAt(20, 100, string, CENTER_MODE);
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if (format->NbrChannels == 2)
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{
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sprintf((char *) string, "Format : %d bits stereo", format->BitPerSample);
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BSP_LCD_DisplayStringAt(20, 115, string, CENTER_MODE);
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}
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else if (format->NbrChannels == 1)
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{
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sprintf((char *) string, "Format : %d bits mono", format->BitPerSample);
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BSP_LCD_DisplayStringAt(20, 115, string, CENTER_MODE);
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}
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/* How to use Joystick for change speaker */
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sprintf((char *) string, "Joystick Right for speaker only");
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BSP_LCD_DisplayStringAt(20, 145, string, CENTER_MODE);
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sprintf((char *) string, "Joystick Left for headset only");
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BSP_LCD_DisplayStringAt(20, 160, string, CENTER_MODE);
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}
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/*--------------------------------
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Callbacks implementation:
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The callbacks prototypes are defined in the stm3210c_eval_audio.h file
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and their implementation should be done in the user code if they are needed.
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Below some examples of callback implementations.
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--------------------------------------------------------*/
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/**
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* @brief Calculates the remaining file size and new position of the pointer.
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* @param None
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* @retval None
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*/
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void BSP_AUDIO_OUT_TransferComplete_CallBack()
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{
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uint32_t replay = 0;
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if (AudioRemSize > 0)
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{
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/* Replay from the current position */
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BSP_AUDIO_OUT_ChangeBuffer((uint16_t*)CurrentPos, DMA_MAX(AudioRemSize));
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/* Update the current pointer position */
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CurrentPos += DMA_MAX(AudioRemSize);
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/* Update the remaining number of data to be played */
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AudioRemSize -= DMA_MAX(AudioRemSize);
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}
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else
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{
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/* Request to replay audio file from beginning */
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replay = 1;
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}
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/* Audio sample used for play*/
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if(replay == 1)
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{
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/* Replay from the beginning */
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/* Set the current audio pointer position */
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CurrentPos = (uint16_t *)(AUDIO_FILE_ADDRESS);
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/* Replay from the beginning */
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if (BSP_AUDIO_OUT_Play(CurrentPos,DMA_MAX(AudioTotalSize)) != 0)
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{
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Error_Handler();
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}
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/* Toggle Green Led, each time a replay is requested */
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BSP_LED_Toggle(LED_GREEN);
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/* Update the remaining number of data to be played */
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AudioRemSize = AudioTotalSize - DMA_MAX(AudioTotalSize);
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/* Update the current audio pointer position */
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CurrentPos += DMA_MAX(AudioTotalSize);
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}
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}
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/**
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* @brief Manages the DMA FIFO error interrupt.
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* @param None
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* @retval None
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*/
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void BSP_AUDIO_OUT_Error_CallBack(void)
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{
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/* Stop the program with an infinite loop */
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Error_Handler();
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}
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/**
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* @}
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*/
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/**
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* @}
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*/
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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