STM32H743 (STM32H7) SDMMC DMA not configurable

[caleb]

Hello,

I'm attempting to use the SDMMC with an SD card, and with DMA. However, when I use the STM32CubeMX IDE, there is no option to enable or use the DMA.

Using: STM32CubeMX version 5.3.0

Here's the configuration for SDMMC1 on the STM32H743

And here it is for SDMMC1on the STM32F7

Notice that there is no DMA configuration option for the H7, but there is for the F7.

Does this mean that ST doesn't have DMA based drivers on the H7? With the polling drivers, my performance is extremely slow -- something like 0.2MB/sec.

Any idea how to get reasonably high write speeds on the SDMMC interface on the H7?

BTW, I'm using a custom board without the transceiver.

Thanks,

-Caleb

[caleb]

Doh! How did I miss that? Thanks,

-Caleb

[Mohammed Eshaq]

I have the exact same problem. After debugging I found out that: HAL_SD_TxCpltCallback() and HAL_SD_RxCpltCallback() never get called!

Any ideas?

[Reza1]

Hi,

I have faced same issues in 2022. I'm using STM32H743II and Generating its code with  STM32CubeMX version 6.3.0 and FatFs library.

When I touch the screen repetitively, "f_open" returns DISK_ERROR. I have seen this problem when have used STM32F7 and i have resolved it by confining micro SD with DMA. Now I want to run micro SD with DMA in STM32H743II but I can't reach the appropriate config in Cube. I have read about IDMA and MDMA but can't run them. I don't know how config IDMA or MDMA with SDMMC.

I hope someone helps me, please?

Thanks

[Reza1]

Hi,

I have faced with same issues in 2022. I'm using STM32H743II and generating its code with STM32CubeMX version 6.3.0 and FatFs library.

When I touch the screen repetitively, "f_open" returns DISK_ERROR. I have seen this problem when have used STM32F7 and I have resolved it by setting micro SD with DMA. Now I want to run micro SD with DMA in STM32H743II but I can't reach the appropriate config in Cube. I have read about IDMA and MDMA but can't run them. I don't know how config IDMA or MDMA with SDMMC.

Anybody can help me, please?

Thanks