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/* ... */
#include "usbd_storage.h"
#include "stm32446e_eval_sd.h"
Includes
#define STORAGE_LUN_NBR 1
#define STORAGE_BLK_NBR 0x10000
#define STORAGE_BLK_SIZ 0x200
Private define
__IO uint32_t writestatus, readstatus = 0;
int8_t STORAGE_Inquirydata[] = {
0x00,
0x80,
0x02,
0x02,
(STANDARD_INQUIRY_DATA_LEN - 5),
0x00,
0x00,
0x00,
'S', 'T', 'M', ' ', ' ', ' ', ' ', ' ',
'P', 'r', 'o', 'd', 'u', 'c', 't', ' ',
' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
'0', '.', '0','1',
...};
Private variables
int8_t STORAGE_Init(uint8_t lun);
int8_t STORAGE_GetCapacity(uint8_t lun, uint32_t *block_num, uint16_t *block_size);
int8_t STORAGE_IsReady(uint8_t lun);
int8_t STORAGE_IsWriteProtected(uint8_t lun);
int8_t STORAGE_Read(uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len);
int8_t STORAGE_Write(uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len);
int8_t STORAGE_GetMaxLun(void);
USBD_StorageTypeDef USBD_DISK_fops = {
STORAGE_Init,
STORAGE_GetCapacity,
STORAGE_IsReady,
STORAGE_IsWriteProtected,
STORAGE_Read,
STORAGE_Write,
STORAGE_GetMaxLun,
STORAGE_Inquirydata,
...};Private function prototypes
/* ... */
int8_t STORAGE_Init(uint8_t lun)
{
BSP_SD_Init();
return 0;
}{ ... }
/* ... */
int8_t STORAGE_GetCapacity(uint8_t lun, uint32_t *block_num, uint16_t *block_size)
{
HAL_SD_CardInfoTypeDef info;
int8_t ret = -1;
if(BSP_SD_IsDetected() != SD_NOT_PRESENT)
{
BSP_SD_GetCardInfo(&info);
*block_num = info.LogBlockNbr - 1;
*block_size = info.LogBlockSize;
ret = 0;
}if (BSP_SD_IsDetected() != SD_NOT_PRESENT) { ... }
return ret;
}{ ... }
/* ... */
int8_t STORAGE_IsReady(uint8_t lun)
{
static int8_t prev_status = 0;
int8_t ret = -1;
if(BSP_SD_IsDetected() != SD_NOT_PRESENT)
{
if(prev_status < 0)
{
BSP_SD_Init();
prev_status = 0;
}if (prev_status < 0) { ... }
if(BSP_SD_GetCardState() == SD_TRANSFER_OK)
{
ret = 0;
}if (BSP_SD_GetCardState() == SD_TRANSFER_OK) { ... }
}if (BSP_SD_IsDetected() != SD_NOT_PRESENT) { ... }
else if(prev_status == 0)
{
prev_status = -1;
}else if (prev_status == 0) { ... }
return ret;
}{ ... }
/* ... */
int8_t STORAGE_IsWriteProtected(uint8_t lun)
{
return 0;
}{ ... }
/* ... */
int8_t STORAGE_Read(uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len)
{
int8_t ret = -1;
uint32_t timeout = 100000;
if(BSP_SD_IsDetected() != SD_NOT_PRESENT)
{
BSP_SD_ReadBlocks_DMA((uint32_t *)buf, blk_addr, blk_len);
while (readstatus == 0){}
readstatus = 0;
while (BSP_SD_GetCardState() != SD_TRANSFER_OK)
{
if (timeout-- == 0)
{
return ret;
}if (timeout-- == 0) { ... }
}while (BSP_SD_GetCardState() != SD_TRANSFER_OK) { ... }
ret = 0;
}if (BSP_SD_IsDetected() != SD_NOT_PRESENT) { ... }
return ret;
}{ ... }
/* ... */
int8_t STORAGE_Write(uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len)
{
int8_t ret = -1;
uint32_t timeout = 100000;
if(BSP_SD_IsDetected() != SD_NOT_PRESENT)
{
BSP_SD_WriteBlocks_DMA((uint32_t *)buf, blk_addr, blk_len);
while (writestatus == 0){}
writestatus = 0;
while (BSP_SD_GetCardState() != SD_TRANSFER_OK)
{
if (timeout-- == 0)
{
return ret;
}if (timeout-- == 0) { ... }
}while (BSP_SD_GetCardState() != SD_TRANSFER_OK) { ... }
ret = 0;
}if (BSP_SD_IsDetected() != SD_NOT_PRESENT) { ... }
return ret;
}{ ... }
/* ... */
int8_t STORAGE_GetMaxLun(void)
{
return(STORAGE_LUN_NBR - 1);
}{ ... }
/* ... */
void BSP_SD_WriteCpltCallback(void)
{
writestatus = 1;
}{ ... }
/* ... */
void BSP_SD_ReadCpltCallback(void)
{
readstatus = 1;
}{ ... }