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SSin
SSin
Associate II
November 19, 2021
Question

STM32cubeMX SDIO HAL driver doesn't work

  • November 19, 2021
  • 1 reply
  • 1056 views

Hello all,

I just start a new project with STM32CubeMX v6.3.0, STM32CubeIDE v1.7.0 & STM32F103RC. When I add the SDIO @ CubeMX, the program just freeze @ MX_SDIO_SD_Init. So I go deeper & find out in function SDMMC_GetCmdResp1, SDIO_FLAG_CTIMEOUT flag is set, causing error status. And the error handler always loop back to MX_SDIO_SD_Init. Can anyone repeat my problem?

Attached please find my project

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    1 reply

    SSin
    SSinAuthor
    Associate II
    December 6, 2021

    Hello! Can anyone take a look in the problem?

    I tried to float all the SDIO related pins (don't connect anything to PC8, PC9, PC10, PC11, PC12 & PD2) & the problem still happen. So I go deeper & find out the program goes to

    MX_SDIO_SD_Init > HAL_SD_Init > HAL_SD_InitCard > SD_PowerON > SDMMC_CmdAppCommand > SDMMC_GetCmdResp1

    Before running SDMMC_GetCmdResp1 (line 877 @ stm32f1xx_ll_sdmmc.c), it runs SDIO_SendCommand. And after running MODIFY_REG @ SDIO_SendCommand, SDIOx->STA will become 4 (SDIO_FLAG_CTIMEOUT flag will raise). According to my understanding, SDMMC_CmdAppCommand writes 0x477 into SDIOx->CMD register, which mean writing 0x37 via SDIO. And the timeout flag raise because there are no response. So what is the propose for writing a command and wait for response during SDIO initialization? Is the library expect that I MUST INSTALL A VALID SD CARD in order to start the program? Otherwise the MCU can only loop back & wait for SD card?

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