J-Link / J-Flash v6.12 Programming and Erasure of Secured STM32F3 Devices

  • J-Link / J-Flash v6.12 Programming and Erasure of Secured STM32F3 Devices

    I implemented a bootloader for STM32F3 parts ~4 months ago before working on the main firmware; everything in the implementation went well and attempting to reprogram the secured devices using J-Flash triggered a dialog stating that they were Write Protected and confirming that they should be programmed anyway. This was in ~Segger J-Flash v5.12.

    Since then I have finished working on the main firmware, updated to Segger v6.12, and have noticed that this dialog has been removed. Is this a bug or was the dialog intentionally removed?

    The post was edited 2 times, last by bartes ().

  • Hi,


    I just gave it a try and could not reproduce the issue with a STM32F373VC target and J-Flash 6.12.
    When write protection is set the appropriate MSGBox pops up.
    Could you please search the windows registry for a key named DontShowAgainUnlockSTM ?

    Best regards,
    Niklas
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  • Found it and it was set to 1. I reset it to 0 and everything is functioning as expected.

    Thanks for the help Niklas; maybe add that as an option in the Options menu? I thought I tmay have accidentally clicked Do Not Show but couldn't find a setting for it in Project or Global Options.

    Note to anyone who shows up looking for an answer later: I searched regedit.exe for "Dont" and didn't initially see the option. Remember regedit searches and shows each result individually so you're better searching for the whole string.