Hi. I have stm32L552xx that i need to program using SWD. I have to halt core, write some code to RAM, replace PC and run core. If some valid code exists on flash i have no problem. It works perfectly. But if i try to do the same thing on empty flash...

I use my own application to program different devices, arm in particular. Now, i'd like to support stm32L552. So, if TZEN = 0 it works fine. if TZEN = 1, DBANK = 1, SECWM1_PSTRT - set as secure, SECWM2_PSTRT - set as non-secure, RDP = 0xaa (level 0) ...