Hello!
I have a custom PCB using the STM32U5A9 microcontroller.
I've been developing my code using Cube IDE with CubeMX generated software including TouchGFX.
I need to implement secure boot and OTA. I am following the SBSFU example for the B-U585I-IOT02A board and struggling to incorporate my project in the Non-secure user application segment of that demo project. I’m also trying to go the other way around and implement the SBSFU infrastructure and files into my custom project.
First question - all I need is secure boot and OTA is it true that I do not need to enable the Trust Zone? If so, how should I modify the SBSFU build process to only include one image?
Second question - It’s been difficult to follow the SBSFU code especially the slot addresses and programming to replicate it within my custom project. The postbuild script for the SBSFU_Boot project pulls firmware size values from image_macros_preprocessed_bl2.c to populate addresses in other scripts like SBSFU_Update.sh. How is this file generated? What do I need to bring in from the SBSFU project to execute it within my custom project structure?
Any thoughts or recommendations would be appreciated! Thank you.
