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/**
******************************************************************************
* @file sd_diskio.c
* @author MCD Application Team
* @version V1.0.0
* @date 18-February-2014
* @brief SD Disk I/O driver
******************************************************************************
* @attention
*
* <h2><center>© COPYRIGHT 2014 STMicroelectronics</center></h2>
*
* Licensed under MCD-ST Liberty SW License Agreement V2, (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/software_license_agreement_liberty_v2
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include <string.h>
#include "ff_gen_drv.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Block Size in Bytes */
#define BLOCK_SIZE 512
/* Private variables ---------------------------------------------------------*/
/* Disk status */
static volatile DSTATUS Stat = STA_NOINIT;
/* Private function prototypes -----------------------------------------------*/
DSTATUS SD_initialize (void);
DSTATUS SD_status (void);
DRESULT SD_read (BYTE*, DWORD, BYTE);
#if _USE_WRITE == 1
DRESULT SD_write (const BYTE*, DWORD, BYTE);
#endif /* _USE_WRITE == 1 */
#if _USE_IOCTL == 1
DRESULT SD_ioctl (BYTE, void*);
#endif /* _USE_IOCTL == 1 */
Diskio_drvTypeDef SD_Driver =
{
SD_initialize,
SD_status,
SD_read,
#if _USE_WRITE == 1
SD_write,
#endif /* _USE_WRITE == 1 */
#if _USE_IOCTL == 1
SD_ioctl,
#endif /* _USE_IOCTL == 1 */
};
/* Private functions ---------------------------------------------------------*/
/**
* @brief Initializes a Drive
* @param None
* @retval DSTATUS: Operation status
*/
DSTATUS SD_initialize(void)
{
Stat = STA_NOINIT;
/* Configure the uSD device */
if(BSP_SD_Init() == MSD_OK)
{
Stat &= ~STA_NOINIT;
}
return Stat;
}
/**
* @brief Gets Disk Status
* @param None
* @retval DSTATUS: Operation status
*/
DSTATUS SD_status(void)
{
Stat = STA_NOINIT;
if(BSP_SD_GetStatus() == 0)
{
Stat &= ~STA_NOINIT;
}
return Stat;
}
/**
* @brief Reads Sector(s)
* @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 SD_read(BYTE *buff, DWORD sector, BYTE count)
{
uint32_t timeout = 100000;
DWORD scratch [BLOCK_SIZE / 4]; /* Alignment ensured, need enough stack */
uint8_t SD_state = MSD_OK;
if ((DWORD)buff & 3) /* DMA Alignment issue, do single up to aligned buffer */
{
while (count--)
{
SD_state = BSP_SD_ReadBlocks_DMA((uint32_t*)scratch, (uint64_t) ((sector + count) * BLOCK_SIZE), BLOCK_SIZE, 1);
while(BSP_SD_GetStatus() != SD_TRANSFER_OK)
{
if (timeout-- == 0)
{
return RES_ERROR;
}
}
memcpy (&buff[count * BLOCK_SIZE] ,scratch, BLOCK_SIZE);
}
}
else
{
SD_state = BSP_SD_ReadBlocks_DMA((uint32_t*)buff, (uint64_t) (sector * BLOCK_SIZE), BLOCK_SIZE, count);
while(BSP_SD_GetStatus() != SD_TRANSFER_OK)
{
if (timeout-- == 0)
{
return RES_ERROR;
}
}
}
if (SD_state == MSD_OK)
{
return RES_OK;
}
return RES_ERROR;
}
/**
* @brief Writes Sector(s)
* @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 SD_write(const BYTE *buff, DWORD sector, BYTE count)
{
uint32_t timeout = 100000;
DWORD scratch [BLOCK_SIZE / 4]; /* Alignment ensured, need enough stack */
uint8_t SD_state = MSD_OK;
if ((DWORD)buff & 3) /* DMA Alignment issue, do single up to aligned buffer */
{
while (count--)
{
memcpy (scratch, &buff[count * BLOCK_SIZE], BLOCK_SIZE);
SD_state = BSP_SD_WriteBlocks_DMA((uint32_t*)scratch, (uint64_t)((sector + count) * BLOCK_SIZE), BLOCK_SIZE, 1);
while(BSP_SD_GetStatus() != SD_TRANSFER_OK)
{
if (timeout-- == 0)
{
return RES_ERROR;
}
}
}
}
else
{
SD_state = BSP_SD_WriteBlocks_DMA((uint32_t*)buff, (uint64_t)(sector * BLOCK_SIZE), BLOCK_SIZE, count);
while(BSP_SD_GetStatus() != SD_TRANSFER_OK)
{
if (timeout-- == 0)
{
return RES_ERROR;
}
}
}
if (SD_state == MSD_OK)
{
return RES_OK;
}
return RES_ERROR;
}
#endif /* _USE_WRITE == 1 */
/**
* @brief I/O control operation
* @param cmd: Control code
* @param *buff: Buffer to send/receive control data
* @retval DRESULT: Operation result
*/
#if _USE_IOCTL == 1
DRESULT SD_ioctl(BYTE cmd, void *buff)
{
DRESULT res = RES_ERROR;
HAL_SD_CardInfoTypedef 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.CardCapacity / BLOCK_SIZE;
res = RES_OK;
break;
/* Get R/W sector size (WORD) */
case GET_SECTOR_SIZE :
*(WORD*)buff = BLOCK_SIZE;
res = RES_OK;
break;
/* Get erase block size in unit of sector (DWORD) */
case GET_BLOCK_SIZE :
*(DWORD*)buff = BLOCK_SIZE;
break;
default:
res = RES_PARERR;
}
return res;
}
#endif /* _USE_IOCTL == 1 */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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