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mmc_diskio.c
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mmc_diskio.c
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/**
******************************************************************************
* @file FatFs/FatFs_eMMC_Standalone/Src/mmc_diskio.c
* @author MCD Application Team
* @brief MMC Disk I/O driver
******************************************************************************
* @attention
*
* <h2><center>© Copyright (c) 2019 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:
* http://www.st.com/SLA0044
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "ff_gen_drv.h"
#include "mmc_diskio.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define MMC_DEFAULT_BLOCK_SIZE 512
/* Private variables ---------------------------------------------------------*/
/* Disk status */
static volatile DSTATUS Stat = STA_NOINIT;
/* Private function prototypes -----------------------------------------------*/
static DSTATUS MMC_CheckStatus(BYTE lun);
DSTATUS MMC_initialize (BYTE);
DSTATUS MMC_status (BYTE);
DRESULT MMC_read (BYTE, BYTE*, DWORD, UINT);
#if _USE_WRITE == 1
DRESULT MMC_write (BYTE, const BYTE*, DWORD, UINT);
#endif /* _USE_WRITE == 1 */
#if _USE_IOCTL == 1
DRESULT MMC_ioctl (BYTE, BYTE, void*);
#endif /* _USE_IOCTL == 1 */
const Diskio_drvTypeDef MMC_Driver =
{
MMC_initialize,
MMC_status,
MMC_read,
#if _USE_WRITE == 1
MMC_write,
#endif /* _USE_WRITE == 1 */
#if _USE_IOCTL == 1
MMC_ioctl,
#endif /* _USE_IOCTL == 1 */
};
/* Private functions ---------------------------------------------------------*/
static DSTATUS MMC_CheckStatus(BYTE lun)
{
Stat = STA_NOINIT;
if(BSP_MMC_GetCardState() == MMC_TRANSFER_OK)
{
Stat &= ~STA_NOINIT;
}
return Stat;
}
/**
* @brief Initializes a Drive
* @param lun : not used
* @retval DSTATUS: Operation status
*/
DSTATUS MMC_initialize(BYTE lun)
{
if (MMC_OK == BSP_MMC_DeInit())
{
if (MMC_OK == BSP_MMC_Init())
{
Stat = MMC_CheckStatus(lun);
}
}
return Stat;
}
/**
* @brief Gets Disk Status
* @param lun : not used
* @retval DSTATUS: Operation status
*/
DSTATUS MMC_status(BYTE lun)
{
return MMC_CheckStatus(lun);
}
/**
* @brief Reads Sector(s)
* @param lun : not used
* @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 MMC_read(BYTE lun, BYTE *buff, DWORD sector, UINT count)
{
DRESULT res = RES_ERROR;
if(BSP_MMC_ReadBlocks((uint32_t*)buff,
(uint32_t) (sector),
count, SDMMC_DATATIMEOUT) == MMC_OK)
{
/* wait until the read operation is finished */
while(BSP_MMC_GetCardState()!= MMC_TRANSFER_OK)
{
}
res = RES_OK;
}
return res;
}
/**
* @brief Writes Sector(s)
* @param lun : not used
* @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 MMC_write(BYTE lun, const BYTE *buff, DWORD sector, UINT count)
{
DRESULT res = RES_ERROR;
if(BSP_MMC_WriteBlocks((uint32_t*)buff,
(uint32_t)(sector),
count, SDMMC_DATATIMEOUT) == MMC_OK)
{
/* wait until the Write operation is finished */
while(BSP_MMC_GetCardState() != MMC_TRANSFER_OK)
{
}
res = RES_OK;
}
return res;
}
#endif /* _USE_WRITE == 1 */
/**
* @brief I/O control operation
* @param lun : not used
* @param cmd: Control code
* @param *buff: Buffer to send/receive control data
* @retval DRESULT: Operation result
*/
#if _USE_IOCTL == 1
DRESULT MMC_ioctl(BYTE lun, BYTE cmd, void *buff)
{
DRESULT res = RES_ERROR;
BSP_MMC_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_MMC_GetCardInfo(&CardInfo);
*(DWORD*)buff = CardInfo.LogBlockNbr;
res = RES_OK;
break;
/* Get R/W sector size (WORD) */
case GET_SECTOR_SIZE :
BSP_MMC_GetCardInfo(&CardInfo);
*(WORD*)buff = CardInfo.LogBlockSize;
res = RES_OK;
break;
/* Get erase block size in unit of sector (DWORD) */
case GET_BLOCK_SIZE :
BSP_MMC_GetCardInfo(&CardInfo);
*(DWORD*)buff = CardInfo.LogBlockSize / MMC_DEFAULT_BLOCK_SIZE;
res = RES_OK;
break;
default:
res = RES_PARERR;
}
while(BSP_MMC_GetCardState() != MMC_TRANSFER_OK)
{
}
return res;
}
#endif /* _USE_IOCTL == 1 */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/