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STM32-H755ZI system clock configuration error with changed CPU clocks from default

marte2003
Associate

Hello everyone,

I choose the stm32 H755ZI (develop board) because I need a dual core microcontroller and a fast one. I never worked with dual core before (I did with STM32 and CubeIDE) so i let everything for default mode and tried to debug my project with this tutorial:

https://www.youtube.com/watch?v=jI1k6p-fduE&t=254s 

It worked and it seem time to change the settings too my project. 

My settings for the clock:

marte2003_0-1746624931635.png

RCC settings:

marte2003_1-1746625006429.png

 

and some other stuff with timers etc.

 

Then I wanted to debug again and the M4 core passed out and the M7 core ended up in this while loop in system clock config: 

marte2003_2-1746625077001.png

 

I tried multipel things: 1. lower clock config 2. lower clock config in combination with SMPS instead of LDO, but nothing works. Can anyone help me please? Thanks!!

 

Greetings from Holland 

 

 

 

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