does a 32GByte ultra SD work in FatFS ?

[Trevor Jones]

I have a shiny new Samsung EVO 32GB formated as 29.8GB Fat32

will it work ?

I have a H743

tried the FatFS application

it doesn't find the card.

FATFS_LinkDriver fails

[Tesla DeLorean]

Should do, ClockDiv should be constrained by driver code. FATFS_LinkDriver is before the file system touches it.

Any other cards working? Card Present signal?

[Tesla DeLorean]

Don't reformat or use mkfs on the card

[Trevor Jones]

Its a new card, I only save 2 text files .

no other cards here.

what value should we have for ClockDiv?

I have the SDMMC1.2 clock source set to 48MHz,

[Tesla DeLorean]

Probably going to constrain it to 4 down stream. The SDMMC unit should typically clock at 200 MHz, likely limiting wire clock to 25 MHz

Make sure the TRANSCEIVER option is disabled in stm32h7xx_hal_conf.h if you don't actually have one.

CubeMX generated?

[Trevor Jones]

not cube generated,, hacked an application in the repository...

I have a cube file but not sure the correct way to initialize it to read a file into ram.

[Tesla DeLorean]

f_mount, f_open, f_read

Link Layer failing precedes all that though

[Trevor Jones]

gets stuck here in the cube file:

   if(f_mount(&fs, "", 1))

   {

      f_open(&file, "sample1.txt", FA_WRITE | FA_CREATE_ALWAYS); // < --- stuck here

[Tesla DeLorean]

Likely stuck elsewhere...

Figure out what it is spinning on, and that you have IRQ handlers, etc.

EVAL example will be using the transceiver.

You have a debug uart? which/pins?

[Trevor Jones]

std RTx1 PA9/PA10 for debug port.

turned of the TRANSCEIVER option = 0...

stuck here

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)
 {
 /* Wait that the reading process is completed or a timeout occurs */
 timeout = HAL_GetTick();
 while((ReadStatus == 0) && ((HAL_GetTick() - timeout) < SD_TIMEOUT)) /// <---- stuck here
 {
 }
 /* incase of a timeout return error */
 if (ReadStatus == 0)
 {
 res = RES_ERROR;
 }
 else

[Trevor Jones]

set SDMMC1.2 clock to 200MHz

added this, but now it wont compile.

"

Error      undefined reference to `FS_FileOperations'   H743_LCD_2   C:\Users\DAVE\STM32Cube\Repository\STM32Cube_FW_H7_V1.5.0\Projects\H743-144-LCD1\Src\bios.c   250   

		if(FATFS_LinkDriver(&SD_Driver, SDPath) == 0)
	{
		FRESULT res;
 
		res = f_mkfs(SDPath, FM_ANY, 0, workBuffer, sizeof(workBuffer));
 
		if (res != FR_OK)
		{
			Error_Handler();
		}
 
		FS_FileOperations();
	}
 
	/* Unlink SD diskio driver */
	FATFS_UnLinkDriver(SDPath);

[Tesla DeLorean]

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;

}

[Bill Dempsey]

"does a 32GByte ultra SD work in FatFS ?"

I'm able to use one with a F446 running FatFS,,,, I use the mbed libs for SD and not had an issue.

[Tesla DeLorean]

This is a non-DMA test for the SR1, so same USART1

Should output stats and a directory for card, then clocks/plls

[Trevor Jones]

I will have to check that when I get home.
but from the code on the forum,
I got this result..
res = 12 f_getfree