Debugging Cortex M4 in engineering mode, is it necessary to edit and build device trees for custom modifications?

[MNoor.1]

Hello,

I'm trying to connect stm32mp157c-dk2 board with another device over FDCAN in engineering mode (MCU single core) using CN2 pin 3 and 5 (stm32 PA12 and PA11 pins respectively). Though I can initialize and request to use FDCAN1 from resource manager utility without any error, FDCAN related interrupts still don't get fired. Do I need to assign RX/TX pins to M4 FDCAN1 in tf-a, u-boot or kernel device trees.

[Olivier GALLIEN · Accepted solution]

Hi @MNoor.1​ 

In Engeneering mode A7 is on hold and M4 is able to initialize the assigned IPs as per configured in CubeMX.

Thus, not need to change anything on Linux side. ( have to be done when you will move to Production mode)

I guess you should check your FDCAN and related IT settings in CubeMX.

Olivier