j-link serial number -1

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  • j-link serial number -1

    Hello,

    Our company has a j-link, and when I connect it via USB to the PC running jlink.exe I get:

    S/N: -1

    This is shutting me down, because when I try to program flash memory (with trial licenced J-Flash ARM) I get:

    Could not read unit serial number!

    The j-link details are:

    serial number: 672 (black box)

    version 3, marked with 'IAR systems' logo.

    p.s. . I am developing with an ARM 7 core, and have been able to read memory, get device i.d, test speed with the SEGGER tools, but not program in spite of having a valid licence key for j-flash ARM. Have also emailed IAR for advice. I don't know the exact origin of this j-link unit. I also note that the

    firmware was last updated October 2006.

    I Would appreciate any advice.

    :)
  • Hello ABCsias,

    sorry for the late response.
    Did J-Link.exe ever show the serial number of this J-Link correctly?
    If yes: When did it stop working?

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

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