J-Link EDU CDC UART Driver on Windows 7 - Error Code 10 - This Device Cannot Start

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  • J-Link EDU CDC UART Driver on Windows 7 - Error Code 10 - This Device Cannot Start

    Hi there,



    we bought a J-Link EDU just to test Segger with an idea to upgrade to the PRO version later.


    There wasn't any problem installing the software and USB driver, the device can connect the target board reads the CoreID etc. The device firmware also upgraded to the latest version.

    We need the virtual com port though. I tried to install the driver - it installs without any problem, but there is an error code 10.

    I've tried various time deleting previous driver, changing the com port number etc. but without any success by now.

    Please see screen shots attached.Thank you in advance for your support!


    Regards,

    Zhivko Zhelev
    Images

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  • Hello Zhivko,

    The J-Link EDU does NOT support CDC + virtual COM port.
    Where did you get the information that it does?

    CDC is currently only available for some dedicated J-Link OBs (on board versions of J-Link segger.com/jlink-ob.html).

    Moreover, how do you think it works? There is NO specification for the generic J-Link 20-pin connector which includes Tx & Rx necessary for J-Link <-> Target UART communication.


    Best regards
    Alex
    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.

  • Hello Alex,







    On the first place, thanks for the fast reply.

    Your answer is so valuable for me. I don't have any information that J-link DOES support a virtual COM port THROUGH the generic 20 pin JTAG interface. And I'm not trying to get this. But I'm just wondering IS it possible to access J-links JTAG functionality through this virtual com port - as FTDI based JTAG does?







    Nothing more. Thanks.



    Zhivko

    The post was edited 1 time, last by jjelev ().

  • Hi,

    But I'm just wondering IS it possible to access J-links JTAG functionality through this virtual com port

    No, and currently there are no plans to implement this.
    It just makes things terrible slow and what advantages do you see in having this available (small sample is appreciated)?


    Best regards
    Alex
    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.

  • Hello Alex,



    one example using this kind of JTAG is using it with Precision32 IDE where the IDE is locked to two particular JTAGs but FTDI like JTAG can be used. Unfortunately my try to test and use Segger for future projects is unsuccessful for the moment. It is a decent JTAG and might by used one happy day for another MCU/IDE but now we had to go fast forward and bought one of their recommended products.

    Thank you.