how can i interface the sd driver using spi , made for user_diskio.c only to run with usbd_storage_if.c
The function used by user_diskio.c for read and write
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 */
return SD_disk_read(pdrv, buff, sector, count);
/* USER CODE END READ */
}
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 */
return SD_disk_write(pdrv, buff, sector, count);
/* USER CODE END WRITE */
}
how can the above be used for usbd_storage_if.c
int8_t STORAGE_Read_FS(uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len)
{
return (USBD_OK);
}
int8_t STORAGE_Write_FS(uint8_t lun, uint8_t *buf, uint32_t blk_addr, uint16_t blk_len)
{
return (USBD_OK);
}
please share how this can be done , what could be the possible problems or limitations doing this , also refer if any projects using sd spi fatfs usb as well .Thanks in advance.
