unleashed-firmware/firmware/targets/local/fatfs/user_diskio.c

/* USER CODE BEGIN Header */
/**
 ******************************************************************************
 * @file    user_diskio.c
 * @brief   This file includes a diskio driver skeleton to be completed by the user.
 ******************************************************************************
 * @attention
 *
 * <h2><center>&copy; Copyright (c) 2020 STMicroelectronics.
 * All rights reserved.</center></h2>
 *
 * This software component is licensed by ST under Ultimate Liberty license
 * SLA0044, the "License"; You may not use this file except in compliance with
 * the License. You may obtain a copy of the License at:
 *                             www.st.com/SLA0044
 *
 ******************************************************************************
 */
/* USER CODE END Header */

#ifdef USE_OBSOLETE_USER_CODE_SECTION_0
/* 
 * Warning: the user section 0 is no more in use (starting from CubeMx version 4.16.0)
 * To be suppressed in the future. 
 * Kept to ensure backward compatibility with previous CubeMx versions when 
 * migrating projects. 
 * User code previously added there should be copied in the new user sections before 
 * the section contents can be deleted.
 */
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
#endif

/* USER CODE BEGIN DECL */

/* Includes ------------------------------------------------------------------*/
#include "user_diskio.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/

/* Private variables ---------------------------------------------------------*/
/* Disk status */
static volatile DSTATUS Stat = STA_NOINIT;

static DSTATUS User_CheckStatus(BYTE lun) {
    Stat = STA_NOINIT;

    if(BSP_SD_GetCardState() == MSD_OK) {
        Stat &= ~STA_NOINIT;
    }

    return Stat;
}
/* USER CODE END DECL */

/* Private function prototypes -----------------------------------------------*/
DSTATUS USER_initialize(BYTE pdrv);
DSTATUS USER_status(BYTE pdrv);
DRESULT USER_read(BYTE pdrv, BYTE* buff, DWORD sector, UINT count);
#if _USE_WRITE == 1
DRESULT USER_write(BYTE pdrv, const BYTE* buff, DWORD sector, UINT count);
#endif /* _USE_WRITE == 1 */
#if _USE_IOCTL == 1
DRESULT USER_ioctl(BYTE pdrv, BYTE cmd, void* buff);
#endif /* _USE_IOCTL == 1 */

Diskio_drvTypeDef USER_Driver = {
    USER_initialize,
    USER_status,
    USER_read,
#if _USE_WRITE
    USER_write,
#endif /* _USE_WRITE == 1 */
#if _USE_IOCTL == 1
    USER_ioctl,
#endif /* _USE_IOCTL == 1 */
};

/* Private functions ---------------------------------------------------------*/

/**
  * @brief  Initializes a Drive
  * @param  pdrv: Physical drive number (0..)
  * @retval DSTATUS: Operation status
  */
DSTATUS USER_initialize(BYTE pdrv /* Physical drive nmuber to identify the drive */
) {
    /* USER CODE BEGIN INIT */
    return User_CheckStatus(pdrv);
    /* USER CODE END INIT */
}

/**
  * @brief  Gets Disk Status 
  * @param  pdrv: Physical drive number (0..)
  * @retval DSTATUS: Operation status
  */
DSTATUS USER_status(BYTE pdrv /* Physical drive number to identify the drive */
) {
    /* USER CODE BEGIN STATUS */
    return Stat;
    /* USER CODE END STATUS */
}

/**
  * @brief  Reads Sector(s) 
  * @param  pdrv: Physical drive number (0..)
  * @param  *buff: Data buffer to store read data
  * @param  sector: Sector address (LBA)
  * @param  count: Number of sectors to read (1..128)
  * @retval DRESULT: Operation result
  */
DRESULT USER_read(
    BYTE pdrv, /* Physical drive nmuber to identify the drive */
    BYTE* buff, /* Data buffer to store read data */
    DWORD sector, /* Sector address in LBA */
    UINT count /* Number of sectors to read */
) {
    /* USER CODE BEGIN READ */
    DRESULT res = RES_ERROR;
    if(BSP_SD_ReadBlocks((uint32_t*)buff, (uint32_t)(sector), count, SD_DATATIMEOUT) == MSD_OK) {
        /* wait until the read operation is finished */
        while(BSP_SD_GetCardState() != MSD_OK) {
        }
        res = RES_OK;
    }

    return res;
    /* USER CODE END READ */
}

/**
  * @brief  Writes Sector(s)  
  * @param  pdrv: Physical drive number (0..)
  * @param  *buff: Data to be written
  * @param  sector: Sector address (LBA)
  * @param  count: Number of sectors to write (1..128)
  * @retval DRESULT: Operation result
  */
#if _USE_WRITE == 1
DRESULT USER_write(
    BYTE pdrv, /* Physical drive nmuber to identify the drive */
    const BYTE* buff, /* Data to be written */
    DWORD sector, /* Sector address in LBA */
    UINT count /* Number of sectors to write */
) {
    /* USER CODE BEGIN WRITE */
    /* USER CODE HERE */
    DRESULT res = RES_ERROR;

    if(BSP_SD_WriteBlocks((uint32_t*)buff, (uint32_t)(sector), count, SD_DATATIMEOUT) == MSD_OK) {
        /* wait until the Write operation is finished */
        while(BSP_SD_GetCardState() != MSD_OK) {
        }
        res = RES_OK;
    }

    return res;
    /* USER CODE END WRITE */
}
#endif /* _USE_WRITE == 1 */

/**
  * @brief  I/O control operation  
  * @param  pdrv: Physical drive number (0..)
  * @param  cmd: Control code
  * @param  *buff: Buffer to send/receive control data
  * @retval DRESULT: Operation result
  */
#if _USE_IOCTL == 1
DRESULT USER_ioctl(
    BYTE pdrv, /* Physical drive nmuber (0..) */
    BYTE cmd, /* Control code */
    void* buff /* Buffer to send/receive control data */
) {
    /* USER CODE BEGIN IOCTL */
    DRESULT res = RES_ERROR;
    BSP_SD_CardInfo CardInfo;

    if(Stat & STA_NOINIT) return RES_NOTRDY;

    switch(cmd) {
    /* Make sure that no pending write process */
    case CTRL_SYNC:
        res = RES_OK;
        break;

    /* Get number of sectors on the disk (DWORD) */
    case GET_SECTOR_COUNT:
        BSP_SD_GetCardInfo(&CardInfo);
        *(DWORD*)buff = CardInfo.LogBlockNbr;
        res = RES_OK;
        break;

    /* Get R/W sector size (WORD) */
    case GET_SECTOR_SIZE:
        BSP_SD_GetCardInfo(&CardInfo);
        *(WORD*)buff = CardInfo.LogBlockSize;
        res = RES_OK;
        break;

    /* Get erase block size in unit of sector (DWORD) */
    case GET_BLOCK_SIZE:
        BSP_SD_GetCardInfo(&CardInfo);
        *(DWORD*)buff = CardInfo.LogBlockSize;
        res = RES_OK;
        break;

    default:
        res = RES_PARERR;
    }

    return res;
    /* USER CODE END IOCTL */
}
#endif /* _USE_IOCTL == 1 */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/