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https://github.com/STMicroelectronics/STM32CubeF4.git
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232 lines
7.0 KiB
C
232 lines
7.0 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) 2017 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 "audio_play.h"
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/** @addtogroup STM32F4xx_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_SIZE 0x20000
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#define AUDIO_FILE_ADDRESS 0x08020000 /* 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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WAVE_FormatTypeDef *waveformat = NULL;
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/* Variable used to replay audio sample (from play or record test)*/
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__IO uint32_t AudioTest = 0;
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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 uint16_t WrBuffer[WR_BUFFER_SIZE];
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/* Private function prototypes -----------------------------------------------*/
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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_Test(void)
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{
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/* Initial volume level (from 0 (Mute) to 100 (Max)) */
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__IO uint8_t volume = 70;
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/* Initialize MEMS Accelerometer mounted on STM32F4-Discovery board */
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if(BSP_ACCELERO_Init() != ACCELERO_OK)
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{
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/* Initialization Error */
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Error_Handler();
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}
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/* MEMS Accelerometer configure to manage PAUSE, RESUME operations */
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BSP_ACCELERO_Click_ITConfig();
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/* Turn ON LED6: start of Audio file play */
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BSP_LED_On(LED6);
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/* Retrieve Wave Sample rate*/
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waveformat = (WAVE_FormatTypeDef*) AUDIO_FILE_ADDRESS;
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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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Error_Handler();
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}
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/*Set variable used to stop player before starting */
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UserPressButton = 0;
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AudioTest = 0;
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/* Set the total number of data to be played */
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AudioTotalSize = AUDIO_FILE_SIZE;
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/* Set the current audio pointer position */
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CurrentPos = (uint16_t *)(AUDIO_FILE_ADDRESS);
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/* Start the audio player */
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BSP_AUDIO_OUT_Play(CurrentPos, AudioTotalSize);
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/* Update the remaining number of data to be played */
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AudioRemSize = AudioTotalSize - AUDIODATA_SIZE * 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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/* Infinite loop */
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while(!UserPressButton)
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{
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if (PauseResumeStatus == PAUSE_STATUS)
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{
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/* Turn ON LED4: Audio play in pause */
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BSP_LED_On(LED4);
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/* Pause playing */
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BSP_AUDIO_OUT_Pause();
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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 LED4: Audio play running */
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BSP_LED_Off(LED4);
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/* Resume playing */
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BSP_AUDIO_OUT_Resume();
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PauseResumeStatus = IDLE_STATUS;
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}
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}
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/* Stop Player before close Test */
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if (BSP_AUDIO_OUT_Stop(CODEC_PDWN_HW) != 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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}
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/*--------------------------------
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Callbacks implementation:
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The callbacks prototypes are defined in the stm32f401_discovery_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/AUDIODATA_SIZE));
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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 -= AUDIODATA_SIZE * DMA_MAX(AudioRemSize/AUDIODATA_SIZE);
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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((AudioTest == 0) && (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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BSP_AUDIO_OUT_Play(CurrentPos, AudioTotalSize);
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/* Update the remaining number of data to be played */
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AudioRemSize = AudioTotalSize - AUDIODATA_SIZE * 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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/* Audio sample saved during record */
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if((AudioTest == 1) && (replay == 1))
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{
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/* Replay from the beginning */
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BSP_AUDIO_OUT_Play(WrBuffer, 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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