[SOLVED] STM32 F7 Factory Reset

jmag999 · January 7, 2016 at 12:50 PM

I have a board with an STM32F746 that was working fine with my JLINK. I used the STM32 Unlock tool, and selected the F4 family (since there is no F7), and now when I try to debug in IAR, I get an error message "Execution failure in flash loader". No settings have changed since it was working, so I know the flash loader is good (it's the default in IAR 7.50). Any ideas?

SEGGER - Niklas · January 8, 2016 at 2:26 PM

Hi,

the STM32-Unlock Utility does not support STM32F7 devices yet.
We plan to release an updated version within a future release of the J-Link software & documentation pack .

Until then i can only suggest to look up the unlock procedure in the documentation provided by ST and execute the required steps with a tool of your choice, e.g J-Link Commander(jlink.exe).

Best regards,
Niklas

jmag999 · January 8, 2016 at 6:54 PM

Thanks. Any idea where I can find the unlock info? I searched for unlock in the datasheet and referenece manual, but came up short.

SEGGER - Erik · January 8, 2016 at 7:21 PM

Chapter 3.4.2 option bytes programming in the STM32F7 reference manual:
http://www.st.com/web/en/resourc…/DM00124865.pdf

- Erik

tkutscha · February 1, 2016 at 11:00 PM

Here's a JLink Commander script you might be able to leverage to help with unlocking/erasing the STM32F7 parts...

Cheers,
Tim

SEGGER - Erik · February 3, 2016 at 9:52 AM

Hi Tim,

The latest version of the STM32 unlock utility, which is included in the latest software and documentation package V5.10j, comes with support for STM32F7.
Can you please download it, give it a quick try and provide feedback?

Best regards
Erik

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