SBSFU Flash overflow

STsch.1 · ‎2021-12-28

Hi,

I have some trouble with using the SBSFU. In the first place, I could not build the SECoreBin project, but I found out, it was the path length in Windows making me the trouble. Now, after solving this and building a complete new project example, I see a very strange flash usage for this:

The SE_Entry... has a huge flash overflow. Is this a problem? I see also the same thing, when I build other example projects.

Now, when I try to debug the whole thing on a board by activating the debug optimizer, I directly fall into a hardfault and I don't see, what the problem really is. So I expect somehow this to be the problem, but I cannot really be sure.

Bubbles · ‎2022-01-04

Hi @STsch.1 ,

look at the start address, you'll see it once again in the end of the table with 59% full only. There are sub-regions inside the SE_Binary region defined for keys and this tool just doesn't interpret it correctly.

Try building a project with protections disabled and debug enabled first. It's set for release and debug disabled by default.

BR,

J

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STsch.1 · ‎2022-01-04

Hi Jhoud,

Thank you, I could solve this already, the SBSFU works now on a STM32F722. I had something wrong in the linkerscript.

The problem I still could not solve is here:

https://community.st.com/s/question/0D53W00001HaaHjSAJ/sbsfu-start-in-different-flash-memory-sector

I don't see, how I can start the SBSFU at a different address in the flash, since I need the smaller sectors for the application data.