JLink EDU Unable to communicate with nrf51802

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    • JLink EDU Unable to communicate with nrf51802

      Hi All,

      We just got a JLink EDU, and we're having trouble flashing/talking to a board running an nRF51802 chip.. this board was previously flashed with stlinks.
      On one end, when we use nrfjprog we get spammed with this
      Display Spoiler

      Source Code

      1. ERROR: [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
      2. ERROR: [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
      3. ERROR: [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
      4. ERROR: [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
      5. ERROR: [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
      6. ERROR: [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
      7. ERROR: [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".
      8. ERROR: [SeggerBackend] - JLinkARM.dll reported "-1", "An unknown error.".

      full logs are at pastebin.com/4700ehKW


      When we use JLink commander, it also doesn't connect, i.imgur.com/dcSzseV.png

      Any help would be much appreciated!!
    • Hi,
      Thank you for your inquiry.

      We only have nRF51822 devices in house.
      I just gave the connect a quick try and everything works as expected with it.


      Do you use custom hardware or an evaluation board? In the latter case which one?
      If custom hardware, do you experience the same problem on an evaluation board?
      Could you please follow the troubleshooting article on the page linked below
      and send us a screenshot of the entire J-Link Commander output?
      wiki.segger.com/J-Link_cannot_…the_CPU#Target_connection
      Could you please send us a J-Link log file? How to enable:
      wiki.segger.com/J-Link_DLL#Enable_J-Link_Log_File

      Best regards,
      Fabian
      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,
      Did you check the cables / connection on another PC?

      This does not look like an issue with the connect sequence but setup related,
      especially since we did not receive a single other report about such an issue.

      Best regards,
      Fabian
      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.