Can not execute f_open

[Nico3]

I have connected microsd by SDIo to STM4Disc1 board. I am using SD 4 bit. 

 I see on STM forums there is a bug and needs to set 1bit in MX_SDIO_SD_Init

so I changed to   hsd.Init.BusWide = SDIO_BUS_WIDE_1B and reduce SDIO CLK by 192 factor.

I am able to execute FATFS_LinkDriver, f_mount  & f_mks function runs successfully  but f_open  function always fails... 

I tried to create new file using f_open function.

f_open(&MyFile, "TESTING.TXT", FA_CREATE_ALWAYS | FA_WRITE )

 I also tried to open already exiting file  but it also fails.

f_open(&MyFile, "test123.txt", FA_READ)

On seeing FRSEULT  , I see FR_NOFILESYSTEM

[Semer CHERNI]

Hello @Nico3 

First let me thank you for posting.

In fact this is a known issue which is tracked internally.
Waiting for a permanent solution I advise you to go ahead and configure the bus width in CubeMX to1bits.
Then in the generated code for the MX_SDIO_SD_Init function add the following code in the user code section 2:

if (HAL_SD_ConfigWideBusOperation(&hsd, SDIO_BUS_WIDE_4B) != HAL_OK)
  {
    Error_Handler();
  }

BR,

Semer. 

[Nico3]

bus is set to 1 bit. but on executing below function, it goes to error handler

if (HAL_SD_ConfigWideBusOperation(&hsd, SDIO_BUS_WIDE_4B) != HAL_OK)
  {
    Error_Handler();
  }

[Nico3]

I think there is bug in lower level bugs.. DMA  looks mandatory.  I enable it with SDIO IRQ, I can run now with no issues.