Yeah, wouldn't do that, apt to trash the media. Get READ working 100% first
FS_FileOperations() is some LCD User Interface stuff
Do this first
{
FATFS *fs;
DWORD fre_clust, fre_sect, tot_sect;
/* Get volume information and free clusters of drive 1 */
res = f_getfree("", &fre_clust, &fs);
if (res != FR_OK)
{
printf("res = %d f_getfree\n", res);
return;
}
switch(fs->fs_type)
{
case FS_FAT12 : puts("FAT12"); break;
case FS_FAT16 : puts("FAT16"); break;
case FS_FAT32 : puts("FAT32"); break;
case FS_EXFAT : puts("EXFAT"); break;
default : puts("Unknown FAT");
}
/* Get total sectors and free sectors */
tot_sect = (fs->n_fatent - 2) * fs->csize;
fre_sect = fre_clust * fs->csize;
/* Print the free space (assuming 512 bytes/sector) */
printsize(tot_sect / 2, "total drive space");
printsize(fre_sect / 2, "available");
printsize((tot_sect - fre_sect) / 2, "used");
}
in the sd_diskio_dma
/**
* @brief Rx Transfer completed callbacks
* @param hsd: SD handle
* @retval None
*/
void BSP_SD_ReadCpltCallback(void)
{
ReadStatus = 1;
}
in the bsp
/**
* @brief Rx Transfer completed callbacks
* @param hsd: SD handle
* @retval None
*/
void HAL_SD_RxCpltCallback(SD_HandleTypeDef *hsd) // <- make sure you have this
{
BSP_SD_ReadCpltCallback(); // which calls this, that flags completion
}
Or do without DMA
/**
* @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 SD_read(BYTE lun, BYTE *buff, DWORD sector, UINT count)
{
DRESULT res = RES_ERROR;
if(BSP_SD_ReadBlocks((uint32_t*)buff,
(uint32_t) (sector),
count, SD_TIMEOUT) == MSD_OK)
{
/* wait until the read operation is finished */
while(BSP_SD_GetCardState()!= MSD_OK)
{
}
res = RES_OK;
}
return res;
}
