STM32H747XI EXTI interrupts of M4

[davidra7]

Hi,

I am migrating my project from STM32F778AI to STM32H747XI and I have some issues regrading EXTI interrupt on M4 core.

I use custom board with J-link programmer.

I have simple button with hardware pull-up and I configured pin to be EXTI11 on M4 (enabling interrupts- falling edge) and it is not working. But, if I configure this pin to M7 it works perfectly..

Is there anything special that I need to do to make it work?

I read that EXTI works on M4 the same as in M7.

Thanks,

David

[Bowman32]

Hello @davidra7​ 

Make sure that there is to define STM32H747xx, CORE_CM4 is set in the Cortex-M4 project

Best regards,

Bouraoui

[davidra7]

Hi,

It is set because it dont by CubeMX.

The problem was that M7 must be initialized before M4. After that it worked

Thanks,

David

[hongtu]

Hello @davidra7​ 

I meet the same problem that exti can work in M7 but not work in M4.

Can you explain your method？ Thanks！！