I completed SDIO in 1-bit communication in STM32F411E-DISCO but i have problem in SDIO-4 bit communication. I have problem this flag (__HAL_SD_GET_FLAG(hsd, SDIO_FLAG_RXDAVL) .How to rectify the problem ? i used same code for 1 and 4 bit communication.

[AA.27]

[KDJEM.1 · Accepted solution]

Hello @AA.27​ ,

Similar issue is already shared here. 

I recommend you How do I Create a File System on a SD card using STM32CubeIDE? article. This FAQ can help you to create a file system on a SD card with 4-bit bus using STM32F746G-DISCO.

If your project generated with STM32CubeMX, I think this discussion can help you MX_SDIO_SD_Init wrong bus wide initialization (st.com)

Please let me know the result (in both cases: problem resolved or not).

When your question is answered, please close this topic by choosing Select as Best. This will help other users find that answer faster.

Kaouthar