[SOLVED] Unable to change the Serial numbers of the Board via JLink Commander

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  • [SOLVED] Unable to change the Serial numbers of the Board via JLink Commander

    Hi,

    We are unable to change the Serial Number using the JLink Commander, an an auto assignment happens irrespective of writing to the any of the address location

    For example
    wconf 8 01
    wconf 9 C1
    wconf A A4
    wconf B 31
    and when we read back after rebooting the board. We get FF FF FF FF instead of the values written

    Board : RENESAS EK-RA4M1

    Please help us with the resoltuon of workaround

    We see an issue with v7.66e and higher
    wiki.segger.com/J-Link-OB-S124-Renesas#Serial_number
    Images

    • JLink_Error.png

      263.77 kB, 1,152×763, viewed 380 times

  • What makes you think that you can change the S/N of the J-Link OB?
    As the wiki article (you have posted a link to) clearly says:
    Initially, all J-Link-OB-S124 reported the same S/n (831004110) and via a FW update in a new version, the S/N gets „auto-corrected“ to a generated one.

    Actually, you are messing around with undocumented regions of the J-Link config area, so you are actually lucky that you did not brick your OB forever…
    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.