STM32 write to read-out protection option bytes

[redfast00]

Currently, I am failing to flash a stm32l011f4ux; the error I get is:

$ pyocd flash --target stm32l011f4ux bin/firmware.elf
0000414 I Loading /home/user/bin/firmware.elf [load_cmd]
0000545 C Memory transfer fault (read) @ 0x08000000-0x0800003f [__main__]

This is because the RDP (read-out protection) option byte is set to 0xBB. If I set this back to 0xAA (no protection) using STM32CubeProg, flashing is once again possible.

Is there a way to write to the option bytes of STM32 microcontrollers from pyOCD to be able to reset them to 0xAA, and be able to write to the chip again?

[ajaybhargav]

Did you find any solution?

[redfast00]

Not from pyOCD, no :/ but I was able to clear them with STM32CubeProg

[ajaybhargav]

I did the same way. there is some kind of implementation done for STM32H series

pyOCD/pyocd/target/builtin/target_STM32H723xx.py

Line 241 in 5ab5c32

def disable_read_protection(self):

But i don't think it applies to STM32F, but something on those lines can be done.