Hello @Community member ,
First, thank you for sharing your project and build details. Build went smoothly.
Regarding debug configuration. You added SBSFU in the picture.
To make things work with also SBSFU, the SECoreBin.elf should be in first place.
One possible reason for the issue you are facing (step debugging is going in random places) could be related to your USB cable or intermediate USB Hub.
You can give it a try.
Regarding the issue, the first thing I can see is that you are calling SE_APP_ValidateFw unconditionally.
As you can see in the SE code, if you want to validate a firmware that is already validated, you get an error.
But the issue is still here.
For some reason, when calling HAL_Init() in your code, the flash of the flash PGERR is rising. I couldn't find the reason as this seems related to some interrupts triggering at early stages.
Now, if you clear this flash before calling the service the validation works.
So, here is the code I used to make it work:
if (fw_state_mb == 3)
{
if (__HAL_FLASH_GET_FLAG(FLASH_FLAG_PGSERR))
{
LogPrint("Clearing FLASH_FLAG_PGSERR flag \r\n");
__HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_PGSERR);
}
if(SE_SUCCESS == SE_APP_ValidateFw(&eSE_Status, SLOT_ACTIVE_1)){
LogPrint("\n\rFirmware validated..\n\r");
}
else{
LogPrint("\n\rFirmware validation error..\n\r");
}
}
Then here is the trace I get:
Current firmware state = [FWIMG_STATE_SELFTEST]..
Clearing FLASH_FLAG_PGSERR flag
Firmware validated..
So, something needs to be checked at ealy initialization in HAL_Init but you have at least a validated image 🙂
Best regards
Jocelyn
