SDMMC3 is not working on STM32MP157F-EV1 board.

[TSens.1]

Hi, Community,

SDMMC3 is not working on STM32MP157F-EV1 board.

I'm not sure what's wrong.

I can confirm that SDMMC3_CK/CMD/D0 signals are input and output by osilloscope,

but SDMMC_FIFO is empty.

The following code is part of the SD_SendSDStatus function in stm32mp1xx_hal_sd.c

static uint32_t SD_SendSDStatus(SD_HandleTypeDef *hsd, uint32_t *pSDstatus)
{
  :
  :
  :
  
  /* Send ACMD13 (SD_APP_STAUS)  with argument as card's RCA */
  errorstate = SDMMC_CmdStatusRegister(hsd->Instance);
  if(errorstate != HAL_SD_ERROR_NONE)
  {
    hsd->ErrorCode |= HAL_SD_ERROR_NONE;
    return errorstate;
  }
  
  /* Get status data */
  while(!__HAL_SD_GET_FLAG(hsd, SDMMC_FLAG_RXOVERR | SDMMC_FLAG_DCRCFAIL | SDMMC_FLAG_DTIMEOUT | SDMMC_FLAG_DATAEND))
  {
    if(__HAL_SD_GET_FLAG(hsd, SDMMC_FLAG_RXFIFOHF))
    {
      for(count = 0U; count < 8U; count++)
      {
        *pData = SDMMC_ReadFIFO(hsd->Instance);    ★★★NOT REACHABLE!!!★★★
        pData++;
      }
    }
    
    if((HAL_GetTick() - tickstart) >=  SDMMC_DATATIMEOUT)
    {
      return HAL_SD_ERROR_TIMEOUT;
    }
  }
  
  :
  :
  :
  
  return HAL_SD_ERROR_NONE;
}

These are the SDMMC terminals used.

 - PF0 :SDMMC3_D0  (modified)

 - PF1 :SDMMC3_CMD (default)

 - PG15:SDMMC3_CK  (default)

[note]

STM32CubeMX auto generated

 - PD1 :SDMMC3_D0

 - PF1 :SDMMC3_CMD

 - PG15:SDMMC3_CK

Regards, 

[TSens.1]

Sorry,

This issue has been resolved.

[Kevin HUBER]

Hello @TSens.1​ ,

Please can you explain how you solved your issue?

This can maybe help someone else,

Best Regards,

Kevin

[TSens.1 · Accepted solution]

Hello,

I'm ashamed to say this�?but..

As a matter of fact, the signal line connecting the board to the SD card module was disconnected.

I was so ashamed that I wanted to crawl under the rug.

Regards,​

[Kevin HUBER]

Hello @TSens.1​ ,

Thanks for the information ;)

Best regards,

Kevin