MMC working on M4 core but fails to Init on M7 core. Am I missing something ?

[RMarz.1]

Greetings,

I am using an STM32H747 and I have been successful in configuring my eMMC in the M4 core project (Initializing the SDMMC module, linking it to a file system, ...). I can basically do everything on the M4 and it works perfectly. However, when I try to do the same on the M7 it fails. I am literally using the exact same code and the same HAL functions with the same configuration but the HAL_MMC_Init() function returns an error all the time.

Is there something that I haven't taken into account ?

PS : For the M4 project I am using STM32CubeIDE and CubeMX and for the M7 project I use Eclipse with the Sloeber tool (for Arduino boards) since I am using an Arduino Portenta H7 board and wanted to use the arduino libraries on the M7.

[Semer CHERNI]

Hello @RMarz.1​ 

First let me thank you for posting.

Since you are using a non ST tool, I am not able to provide any support about it.

However, I advise you to generate the initialization code with CubeMX also for the M7. Then add the libraries you want to use in the CubeIDE project.

BR,

Semer.