Hello,
I'm looking for some advice on how to progress, beginning from a fairly novice position, with a secure bootloader. I'm beginning a project where at least a secure update process (where the existing application does the update) is desired. Ideally I'd have an encrypted and signed application updates being delivered to my target application and put that away in flash, then reset the MCU and have a bootloader validate / process the update.
I've found Zephyr and had a small play with the MCUBoot -- its seem pretty cool, though I also found that some combinations of options created interesting build failures that were confusing. I've just stumbled across the SBSFU project - which appears to utilise some of MCUBoot, but I'm having a slow time making sense of it, with its half a dozens projects and plethora of source files.
If there is not a STM project that can be configured and directly used on the U575 -- I'm hoping there is at least an overview / walk through of this project somewhere (potentially with diagrams) explaining what role each project has and how its works, how to port it (whats needed), how build it etc? And maybe a walk through of producing an update and deploying it.
Its not clear to me if this project can be used on a non-crypto MCU as the example appears to be for the 585 and it looked like HW crypto was involved.
Kind regards, Nick
