STM32h745 dual core boot issue: can't launch CM4 debug (CM7 OK)

[mehrotraAkshay]

Hi,

I am facing issue with bootup in stm32h745xih6 controller. I am able to initiate debug for CM7 but when I initiate the same for CM4, in that case CM 4 does not go in debug and it fails and following error in there:

<terminated>MOSv1.2_CM4 Debug [STM32 C/C++ Application]

<terminated, exit value: 0>arm-none-eabi-gdb (14.2.90.20240526)

<terminated, exit value: 18>ST-LINK (ST-LINK GDB server)

Whereas same application runs perfectly fine on STM32h745i discovery board.

So what could the issue be, could it be SW related or HW is at fault only?

[mƎALLEm]

Hello,

If as you said it is working on a disco board,

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@mehrotraAkshay wrote:

Whereas same application runs perfectly fine on STM32h745i discovery board.

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So what is the board you are using that presents the issue? Is it a ST board? Custom board?

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@mehrotraAkshay wrote:

Hi,
I am facing issue with bootup in stm32h745xih6 controller.

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[mehrotraAkshay]

Hi,
 
It is a custom board, i can share the schematic if you want me to.

Regards,
Akshay

[mƎALLEm · Accepted solution]

Hello,

CM4 is going to into low power mode at the startup and there is a synchronization between CM7 and CM4 with the hardware semaphore.

So try to undefine:

So, the CM4 will not enter to the low power mode and will not synchronize with CM7. Do you face the same behavior?