[SOLVED] J-link Virtual Com port doesn't work

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  • [SOLVED] J-link Virtual Com port doesn't work

    Hi,

    I recently started working with the Jlink Edu. I need the Vcom port but it doensn't seem to work.
    I have read the manual and another post regarding the isssue but it doensn't seem to do anything.
    I can initialize the port using the conigurater or the commander. I also see the port in my devices under windows.
    But when i connect pin 5 to 17 and send some data nothing seems to happen.

    When i use HTerm to connect i take a baut rate of 38400 but i also tried other speeds.
    There are no problems connecting to the device, but i dont see the data i send comming back.

    I will put some screenshots to clarify.

    Thanks in advance
    greets,
    Bjorn
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    • Connection.jpg

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  • Hello,

    Thank you for your inquiry.
    To be able to use J-Link's VCOM port J-Link needs to know the voltage level of the high and low levels it can use.
    For this VTref and GND must be connected.
    More information can be found here: wiki.segger.com/Using_J-Link_V…M_functionality_and_speed
    Attached is the output of a successful test.
    The test can easily be replicated using our measurement adapter: segger.com/products/debug-prob…easurement-patch-adapter/


    Best regards,
    Nino
    Images
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  • New

    Hello Bjorn,

    Great to hear that you are up and running again.
    We will consider this thread as solved now.

    Best regards,
    Nino
    Please read the forum rules before posting: Forum Rules

    Keep in mind, this is not a support forum. Its main purpose is user to user interaction.
    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 contact us per e-mail.
    The following contact form can be used for this: Contact Us