Can't connect the device if the device had been secured. about pylink

[hkpeprah]

This doesn't seem to be a secured issue. WindowsError generally indicates a Windows system call error. This could be related to what is being fixed by PR #25, so I'd give that a go. If not, I'd check to see if your system has weird permissions.

[ltbkey]

Thank you for your reply!
I have checked PR #25, and tested the new library.py, it did not work because my python version is on win32. My script "jlink_flash.py" should find the "JlinkARM.dll", is that right? Thank you again!

[ltbkey]

Hi @hkpeprah ,
I made more tests. JLink_x64.dll does not affect the connection between jlink and device. I deleted "JLink_x64.dll" in JLink_v620, J-Flash and J-Link commander work correctly: connecting, securing, reading, programming. So the issue just is that "jlink.py" can't connect device if the device had been secured.
One more test, if a device had been secured, I used J-Link commander to connect the device, connected successfully, and the device was erased too. Then "jlink.py" worked correctly.
Thanks!

[hkpeprah]

We currently have not implemented an unlock method for the STM32 in PyLink FWIW.

[sstallion]

How difficult would it be to implement? This is just a single call into the SDK, right?

…

On Wed, Mar 28, 2018 at 2:36 PM, Ford ***@***.***> wrote: We currently have not implemented an unlock method for the STM32 in PyLink FWIW. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#27 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AFtLiL1gY10SyMK8nsDz-gEK_JUqIOANks5ti-YogaJpZM4S8_cP> .

[hkpeprah]

Nope. The SDK has no unlock method. The one that exists for Kinetis is based on Freescale's specification.

[sstallion]

Ah, gotcha. So relatively painful - is there something from JLinkExe that could be used for inspiration?

…

On Wed, Mar 28, 2018 at 2:45 PM, Ford ***@***.***> wrote: Nope. The SDK has no unlock method. The one that exists for Kinetis is based on Freescale's specification. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#27 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AFtLiPzuu88XOvrywTTtagm7gktegQHtks5ti-g_gaJpZM4S8_cP> .

[hkpeprah]

Maybe. But I imagine that there's a spec out there that we can follow. And OpenOCD probably has something as well that we could look at (I did this for the Kinetis one as well), though the first step would be getting a board.

[sstallion]

I might take a look at it if I can find the time. I do have an STM32F207 board handy I can test with.

[ltbkey]

Thank you both! @hkpeprah, @sstallion
Looking forward a good news.
It doesn't matter that chip is erased after the connection. Thank you again.

[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)
...