i am using stm32f103xE MCU. i am using FATFS with SDIO. it's opening the file, but when i am writing the data to the file it's giving the FR_INVALID_OBJECT Error.

[SPARV.1]

char data[] = "Testing File";

if(f_mount(&fs, SD_Path, 0) == FR_OK)

 {

  if(f_open(&myFile, "Test_File.txt", FA_WRITE | FA_CREATE_ALWAYS) == FR_OK)

  {

    if(f_write(&myFile, data, sizeof(data), &myBytes) == FR_OK)

    {

     f_close(&myFile);

    }

   f_close(&myFile);

  }

 }

[Tesla DeLorean]

I wouldn't close the same handle twice.

Validate the DISKIO layer works properly.

Inspect the FATFS code to see what structure was giving the error.

If using local variables, make sure they are cleared and that you have sufficient stack space so things don't get corrupted.​