STM32U385 Filex Standalone SDMMC

[alessandromauro]

Hi, i want to use STM32U385RG (NUCLEO-U385RG-Q) to read and write files on SD using SDMMC (1 bit mode) interface, with FileX in standalone mode. I've successfully tested Fx_File_Edit_Standalone (SRAM) example and SD_ReadWrite_DMA (1 bit mode) example.

Following my MX_FileX_Process function:

VOID MX_FileX_Process(VOID)
{
  UINT status;
  ULONG bytes_read;
  CHAR read_buffer[32];
  CHAR data[] = "This is FileX working on STM32";

  /* Start application */
  printf("FileX Edit Standalone Application Start.\n");


  /* Open the sram_disk driver. */
  status =  fx_media_open(&sram_disk, "STM32_SDIO_DISK", fx_stm32_sd_driver, (VOID *)FX_NULL, (VOID *) fx_sd_media_memory, sizeof(fx_sd_media_memory));


  /* Check the media open status. */
  if (status != FX_SUCCESS)
  {
    Error_Handler();
  }

  printf("SD card opened.\n");

  /* Create a file called STM32.TXT in the root directory.  */
  status =  fx_file_create(&sram_disk, "STM32.TXT");

  /* Check the create status.  */
  if (status != FX_SUCCESS)
  {
    /* Check for an already created status. This is expected on the
    second pass of this loop!  */
    if (status != FX_ALREADY_CREATED)
    {
      /* Create error, call error handler.  */
      Error_Handler();
    }
  }

  /* Open the test file.  */
  status =  fx_file_open(&sram_disk, &fx_file, "STM32.TXT", FX_OPEN_FOR_WRITE);

  /* Check the file open status.  */
  if (status != FX_SUCCESS)
  {
    /* Error opening file, call error handler.  */
    Error_Handler();
  }

  /* Seek to the beginning of the test file.  */
  status =  fx_file_seek(&fx_file, 0);

  /* Check the file seek status.  */
  if (status != FX_SUCCESS)
  {
    /* Error performing file seek, call error handler.  */
    Error_Handler();
  }

  printf("Writing data into the file. \n");

  /* Write a string to the test file.  */
  status =  fx_file_write(&fx_file, data, sizeof(data));

  /* Check the file write status.  */
  if (status != FX_SUCCESS)
  {
    /* Error writing to a file, call error handler.  */
    Error_Handler();
  }

  /* Close the test file.  */
  status =  fx_file_close(&fx_file);

  /* Check the file close status.  */
  if (status != FX_SUCCESS)
  {
    /* Error closing the file, call error handler.  */
    Error_Handler();
  }

  status = fx_media_flush(&sram_disk);

  /* Check the media flush  status.  */
  if (status != FX_SUCCESS)
  {
    /* Error closing the file, call error handler.  */
    Error_Handler();
  }

  /* Open the test file.  */
  status =  fx_file_open(&sram_disk, &fx_file, "STM32.TXT", FX_OPEN_FOR_READ);

  /* Check the file open status.  */
  if (status != FX_SUCCESS)
  {
    /* Error opening file, call error handler.  */
    Error_Handler();
  }

  /* Seek to the beginning of the test file.  */
  status =  fx_file_seek(&fx_file, 0);

  /* Check the file seek status.  */
  if (status != FX_SUCCESS)
  {
    /* Error performing file seek, call error handler.  */
    Error_Handler();
  }

  /* Read the first 28 bytes of the test file.  */
  status =  fx_file_read(&fx_file, read_buffer, sizeof(data), &bytes_read);

  /* Check the file read status.  */
  if ((status != FX_SUCCESS) || (bytes_read != sizeof(data)))
  {
    /* Error reading file, call error handler.  */
    Error_Handler();
  }

  /* Close the test file.  */
  status =  fx_file_close(&fx_file);

  /* Check the file close status. */
  if (status != FX_SUCCESS)
  {
    /* Error closing the file, call error handler. */
    Error_Handler();
  }

  /* Close the media.  */
  status =  fx_media_close(&sram_disk);

  /* Check the media close status.  */
  if (status != FX_SUCCESS)
  {
    /* Error closing the media, call error handler.  */
    Error_Handler();
  }

  printf("Data successfully written.\n");

  /* Infinite loop */
  while (1)
  {
    /* Toggle GREEN LED to indicate status */
    HAL_GPIO_TogglePin(LED_GREEN_GPIO_Port, LED_GREEN_Pin);
    HAL_Delay(500);
  }
}

The code fail on fx_media_open returning Error_Handler after 10 seconds timeout.

What is the problem? 

Thank you

[Saket_Om]

Hello @alessandromauro 

Before calling fx_media_open(), try formatting the SD card with fx_media_format(). This ensures the card has a valid FileX/FAT file system and can prevent the timeout you’re seeing if the media is unformatted or corrupted.

[alessandromauro]

Hello .@Saket_Om, thank you for the answer I formatted the SD card (and checked it again) before connecting them with nucleo, the result is the same. 

Comparaing Fx_File_Edit_Standalone (SDMMC1) example for STM32U575I-EV with Fx_File_Edit_Standalone (SRAM) exaple for NUCLEO-U385RG-Q I've noticed that in the first example, I can enable the interrupt for SDMMC1 (NVIC Settings tab) while in the second example the NVIC Settings tab doesn't exist in SDMMC1 configuration. Could this be the problem?
Thank you.

[MFARH.1]

Hello @alessandromauro ,

During debugging, could you please share the exact return status from fx_media_open() (the error value) before Error_Handler is called?

Regards,

Maher