SDMMC + FATFS on STM32H753Zx

[Naresh_]

Hi,
   i go to start SDMMC1 in STM32H753z, is any sample code? can please provide.

   in SDMMC i need to use FATFS APIs or SDMMC APIs ? i am confusing please help me.

   when i debug the below code i am can n't access it stop at f_mount() starting only.

please provide how to use SDMMC.

Thank You  

[Tesla DeLorean]

STM32Cube_FW_H7_V1.10.0\Projects\STM32H743I-EVAL\Applications\FatFs\FatFs_uSD_Standalone

[Naresh_ · Accepted solution]

Hi Tesla,

        thank you for fast response, 
i have using STM32H753Z custom board, my requirement is read and write in SDMMC (SD card) ,

i am using SDMMC1    PC8 -> SDMMC1_D0

                                     PC9-> SDMMC1_D1

                                     PC10-> SDMMC1_D2

                                      PC11-> SDMMC1_D3

                                      PC12-> SDMMC1_CLK

                                       PD2-> SDMMC1_CMD

                                   PB1 -> CARD_DETECT(GPIO_INPUT)

                                  PB2 -> WR_PROTECT(GPIO_INPUT)

 my issue is when i debug then disk_initialize(pdrv)  pdrv is 0  return the 1 means it not dictated SD card. 

before that i am reading  PB1 -> CARD_DETECT (GPIO_INPUT) by using HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_1)  when card is placed then it return "0".     

[SofLit]

You need to adapt the example pointed out by @Tesla DeLorean to your custom HW

[Naresh_]

hi 
i have using adapter (DM1AA-SF-PEJ-82) part number  

[SofLit]

Even with this adapter you can adapt the example with your HW. So you need to check this Card Connector pinout. 

You need to refer to DM1AA-SF-PEJ-82 documentation.

[Naresh_]

hi Soflit,

       actually Hardware connection is okey but in stm32h7xx_hal_sd.c file 

when i power ON by using this function is SD_PowerON(SD_HandleTypeDef *hsd)  some API is providing time out as below in this are1)  SDMMC_CmdOperCond(hsd->Instance);

                          2)SDMMC_CmdAppCommand(hsd->Instance, 0)

most of  time getting  flag  is 4(time out )  and  some time 1 ( CRC mismatch).