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/* ... */
#include "ff_gen_drv.h"
#include "sd_diskio_dma.h"
Includes
/* ... */
#define SD_TIMEOUT 30 * 1000
#define SD_DEFAULT_BLOCK_SIZE 512
/* ... */
#define DISABLE_SD_INIT
/* ... */
Private define
static volatile DSTATUS Stat = STA_NOINIT;
static volatile UINT WriteStatus = 0, ReadStatus = 0;Private variables
static DSTATUS SD_CheckStatus(BYTE lun);
DSTATUS SD_initialize (BYTE);
DSTATUS SD_status (BYTE);
DRESULT SD_read (BYTE, BYTE*, DWORD, UINT);
#if _USE_WRITE == 1
DRESULT SD_write (BYTE, const BYTE*, DWORD, UINT);
#endif
#if _USE_IOCTL == 1
DRESULT SD_ioctl (BYTE, BYTE, void*);
#endif
const Diskio_drvTypeDef SD_Driver =
{
SD_initialize,
SD_status,
SD_read,
#if _USE_WRITE == 1
SD_write,
#endif
#if _USE_IOCTL == 1
SD_ioctl,
#endif
...};
Private function prototypes
static DSTATUS SD_CheckStatus(BYTE lun)
{
Stat = STA_NOINIT;
if(BSP_SD_GetCardState() == MSD_OK)
{
Stat &= ~STA_NOINIT;
}if (BSP_SD_GetCardState() == MSD_OK) { ... }
return Stat;
}{ ... }
/* ... */
DSTATUS SD_initialize(BYTE lun)
{
#if !defined(DISABLE_SD_INIT)
if(BSP_SD_Init() == MSD_OK)
{
Stat = SD_CheckStatus(lun);
}if (BSP_SD_Init() == MSD_OK) { ... }
/* ... */
#else
Stat = SD_CheckStatus(lun);
#endif
return Stat;
}{ ... }
/* ... */
DSTATUS SD_status(BYTE lun)
{
return SD_CheckStatus(lun);
}{ ... }
/* ... */
DRESULT SD_read(BYTE lun, BYTE *buff, DWORD sector, UINT count)
{
DRESULT res = RES_ERROR;
ReadStatus = 0;
uint32_t timeout;
#if (ENABLE_SD_DMA_CACHE_MAINTENANCE == 1)
uint32_t alignedAddr;
#endif
if(BSP_SD_ReadBlocks_DMA((uint32_t*)buff,
(uint32_t) (sector),
count) == MSD_OK)
{
timeout = HAL_GetTick();
while((ReadStatus == 0) && ((HAL_GetTick() - timeout) < SD_TIMEOUT))
{
}while ((ReadStatus == 0) && ((HAL_GetTick() - timeout) < SD_TIMEOUT)) { ... }
if (ReadStatus == 0)
{
res = RES_ERROR;
}if (ReadStatus == 0) { ... }
else
{
ReadStatus = 0;
timeout = HAL_GetTick();
while((HAL_GetTick() - timeout) < SD_TIMEOUT)
{
if (BSP_SD_GetCardState() == SD_TRANSFER_OK)
{
res = RES_OK;
#if (ENABLE_SD_DMA_CACHE_MAINTENANCE == 1)
/* ... */
alignedAddr = (uint32_t)buff & ~0x1F;
SCB_InvalidateDCache_by_Addr((uint32_t*)alignedAddr, count*BLOCKSIZE + ((uint32_t)buff - alignedAddr));/* ... */
#endif
break;
}if (BSP_SD_GetCardState() == SD_TRANSFER_OK) { ... }
}while ((HAL_GetTick() - timeout) < SD_TIMEOUT) { ... }
}else { ... }
}if (BSP_SD_ReadBlocks_DMA((uint32_t*)buff, (uint32_t) (sector), count) == MSD_OK) { ... }
return res;
}{ ... }
/* ... */
#if _USE_WRITE == 1
DRESULT SD_write(BYTE lun, const BYTE *buff, DWORD sector, UINT count)
{
DRESULT res = RES_ERROR;
WriteStatus = 0;
uint32_t timeout;
#if (ENABLE_SD_DMA_CACHE_MAINTENANCE == 1)
uint32_t alignedAddr;
/* ... */
alignedAddr = (uint32_t)buff & ~0x1F;
SCB_CleanDCache_by_Addr((uint32_t*)alignedAddr, count*BLOCKSIZE + ((uint32_t)buff - alignedAddr));/* ... */
#endif
if(BSP_SD_WriteBlocks_DMA((uint32_t*)buff,
(uint32_t)(sector),
count) == MSD_OK)
{
timeout = HAL_GetTick();
while((WriteStatus == 0) && ((HAL_GetTick() - timeout) < SD_TIMEOUT))
{
}while ((WriteStatus == 0) && ((HAL_GetTick() - timeout) < SD_TIMEOUT)) { ... }
if (WriteStatus == 0)
{
res = RES_ERROR;
}if (WriteStatus == 0) { ... }
else
{
WriteStatus = 0;
timeout = HAL_GetTick();
while((HAL_GetTick() - timeout) < SD_TIMEOUT)
{
if (BSP_SD_GetCardState() == SD_TRANSFER_OK)
{
res = RES_OK;
break;
}if (BSP_SD_GetCardState() == SD_TRANSFER_OK) { ... }
}while ((HAL_GetTick() - timeout) < SD_TIMEOUT) { ... }
}else { ... }
}if (BSP_SD_WriteBlocks_DMA((uint32_t*)buff, (uint32_t)(sector), count) == MSD_OK) { ... }
return res;
}{ ... }
/* ... */#endif
/* ... */
#if _USE_IOCTL == 1
DRESULT SD_ioctl(BYTE lun, BYTE cmd, void *buff)
{
DRESULT res = RES_ERROR;
BSP_SD_CardInfo CardInfo;
if (Stat & STA_NOINIT) return RES_NOTRDY;
switch (cmd)
{
case CTRL_SYNC :
res = RES_OK;
break;
case CTRL_SYNC :
case GET_SECTOR_COUNT :
BSP_SD_GetCardInfo(&CardInfo);
*(DWORD*)buff = CardInfo.LogBlockNbr;
res = RES_OK;
break;
case GET_SECTOR_COUNT :
case GET_SECTOR_SIZE :
BSP_SD_GetCardInfo(&CardInfo);
*(WORD*)buff = CardInfo.LogBlockSize;
res = RES_OK;
break;
case GET_SECTOR_SIZE :
case GET_BLOCK_SIZE :
BSP_SD_GetCardInfo(&CardInfo);
*(DWORD*)buff = CardInfo.LogBlockSize / SD_DEFAULT_BLOCK_SIZE;
res = RES_OK;
break;
case GET_BLOCK_SIZE :
default:
res = RES_PARERR;default
}switch (cmd) { ... }
return res;
}{ ... }
/* ... */#endif
/* ... */
void BSP_SD_WriteCpltCallback(void)
{
WriteStatus = 1;
}{ ... }
/* ... */
void BSP_SD_ReadCpltCallback(void)
{
ReadStatus = 1;
}{ ... }