Interface SDMMC using FileX middleware issue in 4-bit bus width mode - STM32

[ABust.3]

Hi, i'm using STM32U575ZI-Q (in NUCLEO-U575), I want to write and read Fat32 files on SD using SDMMC interface, with FileX middleware. When I set the bus width in 1-bit the app work OK but when I switch the setting to 4-bit buswidth mode the app crashes, the debuging halt in the first reading command after SD initialization (in the HAL_SD_ReadBlocks function, it calls to SDMMC_CmdReadSingleBlock function and when it executes SDMMC_SendCommand the SDMMC bit transfer complete doesn't set)

I'm setting MCU CLK @ 160MHz (AHB & APB at 160MHz too), SDMMC CLK @ 6MHz (source PLL in 96MHz / (2* DIV) with DIV=8).

I repeat, in 1-bit buswidth the code working correctly ! But not in 4-bit mode

On the osciloscope I can see signals on pins D0-D3, so I can verify the 4-bit buswidth is set correctly.

I used a SDHC Standar and a SDHC UHS-1 and the result was the same.

The code includes fx_stm32_sd_driver_glue files.

int main(void)

{

 HAL_Init();

 SystemClock_Config();

 SystemPower_Config();

 MX_GPIO_Init();

 MX_USART1_UART_Init();

 MX_ICACHE_Init();

 MX_FileX_Init();

 MX_SDMMC1_SD_Init();

 HAL_GPIO_WritePin(LED_BLUE_GPIO_Port, LED_BLUE_Pin, GPIO_PIN_SET);

 HAL_GPIO_WritePin(LED_GREEN_GPIO_Port, LED_GREEN_Pin, GPIO_PIN_RESET);

 HAL_GPIO_WritePin(LED_RED_GPIO_Port, LED_RED_Pin, GPIO_PIN_RESET);

 fx_thread_entry(0);

 while(1)

 {

  HAL_GPIO_TogglePin(LED_GREEN_GPIO_Port, LED_GREEN_Pin);

  HAL_Delay(400);

 }

 while (1)

 {

 }

}

void fx_thread_entry(ULONG thread_input)

{

 UINT status;

 ULONG bytes_read;

 CHAR read_buffer[32];

 CHAR buffer_SD[1560];

 CHAR data[] = "This is FileX working on STM32 \0";

 uint32_t a = 0;

 for (a = 0; a < 1560; ++a) {

 buffer_SD[a] = 'G';

 }

 buffer_SD[0] = 'd';

 buffer_SD[1] = 'i';

 buffer_SD[2] = 'v';

 buffer_SD[3] = '2';

 buffer_SD[1559] = '!';

 /* Open the SD disk driver. */

 status = fx_media_open(&sdio_disk, "STM32_SDIO_DISK", fx_stm32_sd_driver, 0,(VOID *) media_memory, sizeof(media_memory));

 /* Check the media open status. */

 if (status != FX_SUCCESS)

 {

  Error_Handler();

 }

 /* Create a file called STM32.TXT in the root directory. */

 status = fx_file_create(&sdio_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(&sdio_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();

 }

 LED_BLUE_GPIO_Port->BRR |= LED_BLUE_Pin;

 /* Write a string to the test file. */

 status = fx_file_write(&fx_file, buffer_SD, sizeof(buffer_SD));

 /* Check the file write status. */

 if (status != FX_SUCCESS)

 {

  /* Error writing to a file, call error handler. */

  Error_Handler();

 }

 LED_BLUE_GPIO_Port->BSRR |= LED_BLUE_Pin;

 /* 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(&sdio_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(&sdio_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(&sdio_disk);

 /* Check the media close status. */

 if (status != FX_SUCCESS)

 {

  /* Error closing the media, call error handler. */

  Error_Handler();

 }

}

I guess the IDMA is not working properly but I'am not sure. If anyone can help me i appreciate it !

[DmitryR]

Hi @WellLeithed and all,

I have nearly the same problem on STM32H753I-EVAL2. I am using the latest HAL and the latest version of Azure RTOS. The only difference is that my system is able to stand 10-20 seconds of very intensive work with SD card but then it still stucks at the same point (FX_STM32_SD_READ_CPLT_NOTIFY()). The SD-clock is 96MHz and this board has a SD voltage converter. 

The separate problem is that Azure RTOS does not generate SD card error callback so if error happens it will probably also stuck at this semaphore or return corrupted data. But I have checked for this, in my case no error callback happens. Looks like there is really no complete interrupt from SD controller.

Regards,

Dmitry