uSD not work in Riverdi 121STM32H7_1_6

[MauFanGilaMedical]

Hello everybody.

I bought Riverdi STM32 Embedded Display RVT121HVSNWC00-B

I create my first project using touch GFX.

I generate code and import it in STM32CubeIDE.

I format FAT32 a 128G uSD using custom program.

I plug the uSD into adapter and I write this code.

fresult is FS_NOT_READY and I don't understand the reason.

Here my configuration.

I notice in the main that there is FATFS initialization

but I don't find a call to MX_SDMMC1_SD_Init.

If I force this call after FATFS initlization the code run in ErrorHandler, but if I inpect hsd1.SdCard struct I see that card property are read correctly (I believe).

BlockSize x BlockNbr = 128G !! OK

Can someone help me ?

Thanks in advice

[MauFanGilaMedical]

If I could help ...

I inspect the code step By step and I notice that my SD card is CARD_V2_X and that code seems go properly until it reaches this instruction in stm32h7xx_hal_sd.c

error state is 4 (HAL_SD_ERROR_CMD_RSP_TIMEOUT) that is different from HAL_SD_ERROR_NONE and so it returns UNSUPPORTED_FEATURE.

Here the stack

[MauFanGilaMedical]

I inspect SDMMC_CmdAppCommand ... I've tried to add some HAL_Delay (commented Mauro Fantina) but the problem still remain

[MauFanGilaMedical · Accepted solution]

Now I can use uSD with this modification.

It's my first time for STM32H757 (and first ST time) so I honestly say that I don't know why it works.

1. Replace 0x00 with SD_PRESENT line 297 in bsp_driver_sd.c

2. Enable SDMMC1 global interrupt

3. Set SDMMC clock divide factor to 4

4. Disable CPU DCache

5. Enable this defines in /CM7/FATFS/Target/sd_diskio.c

With this modifications mount, read and write to uSD work.

I would want to lay the CPU DCache Enabled because to being not enabled let me lose computation power.

If someone has some suggestion I will appreciate.