How to interface EMMC with STM32H743XIH ?

[PyKe]

Hi all,

This is my first project trying to configure an EMMC memory with my stm32H743XIH MCU, and unfortunatly i didnt find any exemples of projects so i can understand how this works !

I'm facing two problems on my first try project :

1) Create project on cubeMX

• SDMMC ==> MMC 8bits Wide Bus
• FatFS ==> Couldn't select it on cubeMX (i think only available with SD Cards)

2) I found no exemple of code to read/write from an emmc memory, all projects i found are with SD Cards.

I will appreciate any help from you guys :)

Thank you.

[Tesla DeLorean]

Sorry not using the Cube stuff here, but there should be example code for the H745I-DISCO that will port.

[PyKe]

Thank you for your answer !

Can you point me to a good project exemple for filesystem/eMMC please ?

[PyKe]

is there any other way to work use file system with the eMMC without using cube ?

[Tesla DeLorean]

Not sure I understand the question, the HAL contains support for MMC, the FatFs middleware is usable everywhere, just need to tailor the DISKIO layer to the medium/driver. ST's made most of the interfaces in an orthogonal way, so most times you can do a search/replace for most of the API, and then do a bit of cleanup.

Materially very similar to the SD Card implementations. Depend how confortable you are with porting existing things as templates, or merging in the individual components.

[Tesla DeLorean · Accepted solution]

STM32Cube_FW_H7_V1.8.0\Projects\STM32H745I-DISCO\Applications\FatFs\FatFs_Shared_Device\Common\Src\mmc_diskio.c

[PyKe]

Thank you very much I will work on this exemple code.

[PyKe]

I understand better now thank you for the explaining !

[matt-aedapt-electronics]

I can't get you on Private Message, I am looking for a Demo of eMMC memory on a STM32F401RET6 (or closest family member)