STM32H7 SDMMC STMCubeMX firmware 1.6.0 FATFS

[VYoun]

Hello,

I am total new to this field and need your help please.

I have an application in which I measure data and collect in a matrix on ram. after the measurement is finished, I write the data on SD card and USART.

I had a code that worked perfectly on STM32F407. But I now have to use STM32H7.

I have configured the H7 SDMMC like the SDIO and also the FATFS the same as the config on STM32F4.

However, the writing on the SD card stops after one time of writing, meaning that data can only be written once on the SD card.

I am attaching the sd card function and my STMCubeMX settings here for your view.

Any help would be greatly appreciated.

void writeToSd8Ch()
{
	free(SDFatFs);
	retSD = FATFS_LinkDriver(&SD_Driver, SDPath);
	SDFatFs = malloc(sizeof (FATFS));
	res = f_mount(SDFatFs, "", 0); //changed way of the function
	if (res == FR_OK){
		// Append a line
		for (int i = 0; (i < totalNoOfMeasurements) ; ++i) {
			res = open_append(&myFile, "oil_sensor_01.txt");
			f_sync(&myFile);
			if(res == FR_OK){
				f_printf(&myFile, "%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u\n", 
                                             sdWriteMatrix[i][0], sdWriteMatrix[i][1], sdWriteMatrix[i][2],
						sdWriteMatrix[i][3], sdWriteMatrix[i][4],sdWriteMatrix[i][5], 
                                                sdWriteMatrix[i][6],sdWriteMatrix[i][7],
						sdWriteMatrix[i][8], sdWriteMatrix[i][9],sdWriteMatrix[i][10], 
                                                 sdWriteMatrix[i][11]);
				f_sync(&myFile);
			}
			//diskStatus = disk_status(0);
			// Close the file
			f_close(&myFile);
		}
		diskStatus = disk_status(0);
		//Close the file
		f_close(&myFile);
		res = f_mount(0, "", 0);
		retSD = FATFS_UnLinkDriver(SDPath);//comment
		retSD = FATFS_LinkDriver(&SD_Driver, SDPath); //comment
		retSD = FATFS_UnLinkDriver(SDPath); //comment
		free(SDFatFs);
	}
	if(res != FR_OK){
		f_close(&myFile);
		res = f_mount(0, "", 0);
		retSD = FATFS_UnLinkDriver(SDPath);
		retSD = FATFS_LinkDriver(&SD_Driver, SDPath);
		free(SDFatFs);
		SDFatFs = malloc(sizeof (FATFS));
		res = f_mount(SDFatFs, "", 1);
	}
}

when running the function for second time, I either get FR_DISK_NOT_READY, FR_DISK_ERROR.

and this is my init function

static void MX_SDMMC1_SD_Init(void)
{
 
  /* USER CODE BEGIN SDMMC1_Init 0 */
 
  /* USER CODE END SDMMC1_Init 0 */
 
  /* USER CODE BEGIN SDMMC1_Init 1 */
 
  /* USER CODE END SDMMC1_Init 1 */
  hsd1.Instance = SDMMC1;
  hsd1.Init.ClockEdge = SDMMC_CLOCK_EDGE_RISING;
  hsd1.Init.ClockPowerSave = SDMMC_CLOCK_POWER_SAVE_DISABLE;
  hsd1.Init.BusWide = SDMMC_BUS_WIDE_1B;
  hsd1.Init.HardwareFlowControl = SDMMC_HARDWARE_FLOW_CONTROL_DISABLE;
  hsd1.Init.ClockDiv = 0;
  hsd1.Init.TranceiverPresent = SDMMC_TRANSCEIVER_NOT_PRESENT;
  /* USER CODE BEGIN SDMMC1_Init 2 */
 
  /* USER CODE END SDMMC1_Init 2 */
 
}

void MX_FATFS_Init(void) 
{
  /*## FatFS: Link the SD driver ###########################*/
  retSD = FATFS_LinkDriver(&SD_Driver, SDPath);
 
  /* USER CODE BEGIN Init */
  /* additional user code for init */     
  /* USER CODE END Init */
}

Thank you in advance for your time and your help

[Tesla DeLorean · Accepted solution]

Check clock division setting, seems fast

Check if interrupt/callbacks are __weak when they shouldn't be.

Check IO Cell Compensation is enabled

CubeMX has a lot of issues, FatFs version is antiquated.

Your code has a lot of other issues, should avoid a lot of unnecessary open/close/sync. The malloc/free look to have a lot of opportunities to fail, or double release.

[VYoun]

Hello,

I will check the clock division. Previously I tried to reduce the core clock, but then the SD stopped working.

Thank you for the comments on my code, I will check those.

>Check IO Cell Compensation is enabled

where can I find this?

Unfortunately, with my skill level and the time pressure I am under, I have no other choice but to use cube.

I will be happy to hear any suggestions.

Thank you again,

Best regards,

Vouria

[VYoun]

I changed the main clock to a lower clock, and the SD stops working altogether.

when I put the main clock at 338 MHz and sd clock is then set at 48 MHz, then the SD starts working.

It writes the data block on the SD card one time. When attempting to write second time, the f_mount funstion returnrs FR_NOT_READY or FR_DISK_ERROR.

I also used the functions provided in the stm32h7 nucleo, but i get the same results.

Thank you in advance for your help.

Best regards,

Vouria

[VYoun]

Hello,

After much trying, it turns out that the clock was too high.

I used the clock divider in the SDMMC to bring down the clock to below 25MHz.

Thanks everybody for your help. I really appreciate it.

Best regards,

Vouria