STM32H755 dual core debugging issue is related to BOOT_CM4 option byte

[MJack.1]

Hi all,

I'm editing this post because the forum doesn't allow me to delete it, and it might help someone else..

I was having an issue where simply generating a default NUCLEO-H755ZI-Q project from the current latest CubeMX for Cube IDE and following the debugging instructions in the following application note exactly, did not work.

I tried lots of suggestions on various posts, but for me it turned out to be that the M4 BOOT option byte was disabled, which is why I couldn't debug the M4.

I resolved it with the STLink utility.

Cheers

[Imen.D]

Thank you @Community member​  for updating your post to share the solution.

This will help other community members finding answers to their issues ;)

Imen