[CLOSED] The cjtag protocol of jlink cannot be connected.

This site uses cookies. By continuing to browse this site, you are agreeing to our Cookie Policy.

  • The cjtag protocol of jlink cannot be connected.

    Connecting ‘J-Link’ using ‘USB 50120677’
    Loaded D:/SEGGER/SEGGER Embedded Studio for RISC-V 6.32a/bin/JLink_x64.dll
    Firmware Version: J-Link V11 compiled Apr 27 2041 16:36:21
    DLL Version: 7.22`
    Hardware Version: V11.00
    Target Voltage: 3.354
    Device "SWERV_EH1" selected.
    Current Speed: 1000 kHz
    ConfigTargetSettings() start
    ConfigTargetSettings() end
    TotalIRLen = ?, IRPrint = 0x..000000000000000000000000
    ConfigTargetSettings() start
    ConfigTargetSettings() end
    TotalIRLen = ?, IRPrint = 0x..000000000000000000000000
    Target connection has been lost


    Edit1:
    Thank you very much

    Edit2:
    Why does this version of J-Link 7.22 issue cjtag connection command different from the official example?


    Edit3:

    Unable to connect the cjtag,It's too hard.




    Edit4:

    The jtag connection is normal
    Images

    • 企业微信截图_16784292835994.png

      13.77 kB, 1,011×414, viewed 231 times

    • 企业微信截图_16784292919622.png

      36.01 kB, 1,545×427, viewed 237 times

  • [CLOSED] The cjtag protocol of jlink cannot be connected.

    Hi,
    A couple of things:
    1) Please refrain from spamming in this forum.
    If you want to add information to the thread before anyone answered, please use the "Edit" function.
    I removed the other messages and included it to the original one.
    2) J-Link V7.22 is fairly outdated. Could you please check if it works with the latest version?
    segger.com/downloads/jlink#J-L…twareAndDocumentationPack
    3) Apparently you already found the article explaining the cJTAG sequnece.
    Have you tried what is mentioned in the note about the short cJTAG sequence?
    wiki.segger.com/J-Link_cJTAG_s…cs#Short_connect_sequence

    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,
    1) I am very sorry for not sending emails in a standard manner. I will pay attention to it next time. Thank you very much for your reply.
    2) I have a comment about short cJTAG sequence, and used Jlink command port to set it, but I did not get the expected result.
    3) I checked that the voltage was 3.3V, the interface setting was also cJTAG, the frequency was set at 1000kHz, and the connection using JTAG was normal.
    4) I'd appreciate it if you could give me a better suggestion. thank you.
    5) Could you please provide some waveform sequences about cJTAG? I'm trying to figure out what's wrong with me by comparing the correct wave sequences,Thank you very much .

    Best regards,
    Yang
    Images

    • cJTAG.png

      26.73 kB, 771×772, viewed 176 times

    • CONFIG.png

      54.85 kB, 961×748, viewed 234 times

    • JATA.png

      35.56 kB, 1,090×987, viewed 217 times

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

  • yangjihong wrote:

    Firmware Version: J-Link V11 compiled Apr 27 2041 16:36:21



    ...
    Unable to connect the cjtag,It's too hard.
    J-Link firmware is very old...
    It is in reality from 2021... It needs to be updated to a new version...The year 2041 on your screenshot is fake... It's a cracked firmware...

    P.S.
    Version HW v11.0 - also cracked...Serial number from J-Link BASE v10.1
    Images

    • jlink.png

      6.22 kB, 558×183, viewed 201 times

  • As Skvo correctly indicated, you are using a clone/cracked J-Link.
    Please note that the use of such a device in combination with our Software is illegal.

    We will close this thread now.

    BR
    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.