How to set or remove read protection of stm32

[as564335sa]

Hi, When I connect a chip that has read protection set, it will throw an exception，How can I set or remove read protection like jflash？

[hkpeprah]

It should happen automatically if you've specified the device correctly. There are unlock methods, but I've only implemented the unlock sequence for the Kinetis chip family.

[Moral-ecomo]

Hi: I just fix this problem, the remove need two steps: 1、modify the pylink source code 2、

def unsecure_device_hook(title, msg, flags):
    return pylink.enums.JLinkFlags.DLG_BUTTON_YES

...
jlink = pylink.JLink(unsecure_hook=unsecure_device_hook)
...

[hkpeprah]

Whoops, you are correct, we by default specify NO to unlock automatically.

[qtvbab]

Hi, I successfully cleared the read protection with @Moral-ecomo method. However, a new problem has arisen. During continuous programming, Once in every two programming, jlink.reset() does not work, but no exception is thrown. Why this problem occurs，and how can I solve it

[hkpeprah]

Which exception is thrown? If you run with logging enabled, you should see more helpful messages:

import logging

logging.basicConfig(level=logging.DEBUG)

[qtvbab]

Oh. I found the reason： If the read protection is set while the debugger is still connected through JTAG/SWD, apply a POR (power-on reset) instead of a system reset (without debugger connection). So after the second programming, the chip cannot start after reset().