SDIO 4 bit DMA UNKNOWN PROBLEM

[Vyagl.1]

This is sd_command line via logic analyzer. I'm writing 1024 bytes every second. But sd_commend do like that. And that's problem for me. If i wanna save some datas. sd_command line spoilng and locking my stm32f411 mcu's. I need help i don't understand to where is the problem or problems? If u want configuration code or file i can send....

f_rslt = f_mount(&myFatFS, SDPath, 1);

f_rslt = f_open(&myFile, "TextFile.txt", FA_WRITE | FA_OPEN_APPEND);

 /* USER CODE END 2 */

 /* Infinite loop */

 /* USER CODE BEGIN WHILE */

 while (1)

 {

counter++;

f_rslt = f_write(&myFile, data, sizeof(data), &myBytes);

if(f_rslt == FR_OK)

{

}

else

{

}

HAL_Delay(100);

if(counter == 10)

{

f_rslt = f_close(&myFile);

f_rslt = f_open(&myFile, "TextFile.txt", FA_WRITE | FA_OPEN_APPEND);

}

  /* USER CODE END WHILE */

  /* USER CODE BEGIN 3 */

 }

[Tesla DeLorean]

Ok, hard to understand the exact issue here.

The loop needs an exit strategy.

The error status needs to be checked an acted upon.

The f_close() will create a lot of SDIO traffic as it flushes file system structures to the media.

Do you need to f_seek() to the end of a file to append? I don't recall.

This is all top-level stuff, to understand what's happening you'll need to instrument DISKIO layer, monitoring the read/write operations, and outputting error/failure information.

The F411 should be capable of continuous operation of SDIO/FATFS.

Writing a lot of small data via f_write() will be super inefficient, you should manage buffering so you flush data at multiples of the sector/cluster size, and aligned on those boundaries.