STM32H743 + SDIO + FATFS（use DMA template）fail to mount

[snkparty1]

STM32H7 + SDIO + FATFS(use DMA template Disable) => works fine. I can read data from SD card without issue.

STM32H7 + SDIO + FATFS(use DMA template Enable) => mount will fail

The only difference is "use DMA template". Once this option is turned on, fatfs mount will fail...

[Imen.D]

Hello @snkparty1 ,

Which CubeMX and Cube firmware version used? 

If the problem occurred with latest releases, please share you ioc file, this will help our team to reproduce and investigate this issue.

[snkparty1]

Thanks to inform me the reason. 

firmware and cubeide version

IOC file attached

SD card schematic

[Imen.D · Accepted solution]

Hello @snkparty1 ,

The DMA controller to be used should be properly configured, and it shows that the MDMA in your ioc is not configured.

You can refer to this AN5200: Getting started with the STM32H7 MCU SDMMC host controller for more details about using SDMMC with DMA and how to configure the MDMA.

[snkparty1]

Thank you， I will check this document