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/**
******************************************************************************
* @file I2S/I2S_Audio/Inc/audio_if.h
* @author MCD Application Team
* @brief Header for audio_if.c module
******************************************************************************
* @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.
*
******************************************************************************
*/
/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __AUDIO_IF_H
#define __AUDIO_IF_H
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/* Exported constants --------------------------------------------------------*/
#define AUDIO_BUFFER_SIZE 1000
#define AUDIO_DEFAULT_VOLUME 70
/* Audio file size and start offset address are defined here since the audio wave file is
stored in Flash memory as a constant table of 16-bit data */
#define AUDIO_FILE_SIZE 147500 /* Size of audio file */
#define AUDIO_FILE_ADDRESS 0x08080000 /* Audio file address */
/* Exported types ------------------------------------------------------------*/
typedef enum {
AUDIO_STATE_IDLE = 0,
AUDIO_STATE_INIT,
AUDIO_STATE_PLAYING,
}AUDIO_PLAYBACK_StateTypeDef;
typedef enum {
AUDIO_ERROR_NONE = 0,
AUDIO_ERROR_NOTREADY,
AUDIO_ERROR_IO,
AUDIO_ERROR_EOF,
}AUDIO_ErrorTypeDef;
typedef enum {
BUFFER_OFFSET_NONE = 0,
BUFFER_OFFSET_HALF,
BUFFER_OFFSET_FULL,
}BUFFER_StateTypeDef;
typedef struct {
uint8_t buff[AUDIO_BUFFER_SIZE];
uint32_t fptr;
BUFFER_StateTypeDef state;
}AUDIO_BufferTypeDef;
/* Exported macro ------------------------------------------------------------*/
/* Exported functions ------------------------------------------------------- */
AUDIO_ErrorTypeDef AUDIO_Init(void);
AUDIO_ErrorTypeDef AUDIO_Start(void);
AUDIO_ErrorTypeDef AUDIO_Process(void);
AUDIO_ErrorTypeDef AUDIO_Stop(void);
#endif /* __AUDIO_IF_H */