I am searching for the simplest way to do that, I think you ST engineers made this chip for this purpose so maybe there are intended ways to that Thanks in advance

I would need to have the OpenAMP_TTY_echo project to follow the tutorial on https://wiki.st.com/stm32mpu/wiki/Getting_started/STM32MP1_boards/STM32MP157x-EV1/Develop_on_Arm%C2%AE_Cortex%C2%AE-M4/Modify,_rebuild_and_reload_a_firmware#pnl-gex1sujftyTha...