Compiling and flashing the original X-CUBE-SBSFU for STM32L4S5 outputs error.

[hotuz.1]

I am using STM32CubeExpansion_SBSFU_V2.6.0 to test SBSFU on B-L4S5I-IOT01A board.

I am using the projects in the Projects/B-L4S5I-IOT01A/2_Images_KMS folder with STM32CubeIDE. I did not change or modify anything regarding the files.

I first built the SECoreBin and then the SBSFU project. Then I followed UM2262 documentation page 48 to flash the SBSFU.bin image.

I connected to the board with Tera Term but getting the following error output:

Am I missing something?

[Fred · Accepted solution]

Hi,

looks like the system concludes that your security protections are not activated correctly.

Maybe you can turn the security off one by one via app_sfu.h, line 156 onwards until you find the one creating the issue ?

Otherwise, you can disable RDP and DAP protection in this same file:

// #define SFU_DAP_PROTECT_ENABLE

// #define SFU_PROTECT_RDP_LEVEL (OB_RDP_LEVEL_1)

Then you can set a breakpoint in:

SFU_BOOT_CheckApplySecurityProtections()

and determine where the check fails.

[Fred]

Just tried with the same version, works for me:

[hotuz.1]

I disabled User configuration- dual-bank option in option bytes using STM32CubeProgrammer and it solved it. It comes enabled by default.

Thank you for the fast response!