[ABANDONED] Bricked JLink?

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  • [ABANDONED] Bricked JLink?

    Hello,

    I just installed the latest version of JLink software, I started JlinkExe and the utility wrote that it must update the hardware. Here the messages in the console (I'm on MacOS):

    np_macbook:UMC-4 np$ /Applications/SEGGER/JLink/JLinkExe
    SEGGER J-Link Commander V6.18c (Compiled Aug 21 2017 16:49:08)
    DLL version V6.18c, compiled Aug 21 2017 16:49:00

    Connecting to J-Link via USB...Updating firmware: J-Link V9 compiled Jul 24 2017 17:37:57
    Replacing firmware: J-Link V9 compiled Jun 16 2017 16:15:10
    FAILED: Communication timeout. Emulator did not re-enumerate.
    J-Link>
    Unknown command. '?' for help.
    J-Link>quit
    Unknown command. '?' for help.
    J-Link>q
    np_macbook:UMC-4 np$ /Applications/SEGGER/JLink/JLinkExe
    SEGGER J-Link Commander V6.18c (Compiled Aug 21 2017 16:49:08)
    DLL version V6.18c, compiled Aug 21 2017 16:49:00

    Connecting to J-Link via USB...
    **************************
    WARNING: Out of sync , resynchronizing...
    **************************


    **************************
    WARNING: Out of sync , resynchronizing...
    **************************


    **************************
    WARNING: Out of sync , resynchronizing...
    **************************

    FAILED: Cannot connect to J-Link via USB.
    J-Link>

    I tried everything, reset, etc. with no success. The LED on the JLink is steady green, no matter what I do. Any chance to recover?

    Regards,

    Lix

  • Hi,

    good to hear that you are up and running again.

    Which version of macOS are you using?
    Was a hypervisor (e.g. Parallels, VMWare, VirtualBox) running at the time of the update?

    After a firmware update, J-Link re-enumerates as a USB device.
    If a guest OS grabs the "new USB device", the J-Link Commander session in macOS will get confused.


    Best regards,
    Niklas
    Please read the forum rules before posting.

    Keep in mind, this is *not* a support forum.
    Our engineers will try to answer your questions between their projects if possible but this can be delayed by longer periods of time.
    Should you be entitled to support you can contact us via our support system: segger.com/ticket/
    Or you can contact us via e-mail.

  • Hi Niklas,

    Thanks you for the quick answer.

    No, I don't use any virtualisation software. However, at the time the JLink has been upgraded (unexpectedly, at least for me), there were many USB devices attached to the bus, mostly USB to serial converters from Silicon Labs and FTDI, plus two 4-ports USB hubs. Maybe this was too much for the Mac...

    I am running the latest version of MacOS Sierra (10.12.6 (16G29)) on a MacBook Pro late 2011 (quite old meanwhile).

    I updated the SEGGER software in the hope I can unlock the Silabs EFR32MGxxx chip, but no luck (I posted separately this issue).

    Best regards,

    Lix