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3LionsCT's avatar
3LionsCT
Icon for Occasional Contributor rankOccasional Contributor
26 days ago
Solved

Invalid JTAG configuration

Hi

Quartus 24.1 standard edition & Windows 11

I tried a new usb blaster ii today and ran into a problem. The computer recognized the blaster ii and installed drivers automatically. I was able to use the programmer to program the Max 10 device, so I know the jtag chain is working. However, I  have a message that I have an invalid JTAG configuration in signal tap. The problem seems to be related to selecting hardware in the jtag chain configuration. I selected usb blaster ii in the pulldown box and close the window (attached). I then try to run signal tap and initially it says acquisition in progress but then says invalid JTAG configuration (attached). When I go back to the JTAG Chain Configuration, the pull-down selector says no hardware. I also see that the signal tap status says “instance not found”. I can reselect usb blaster ii but it always goes back to No hardware after I close the hardware setup window.

I updated the usb blaster manually but that didn’t help. I checked that the jtag status and server info using the command line and they look to be running.

I have deleted the db directory and did a full recompilation without any success.

I finally went back and changed the Hardware Frequency to 1MHHz and was able to run. I even managed to change the Hardware frequency back up 26MHz after I got it to run. I was running all day until I changed the name of the .stp file and then it stopped working till I changed the Hardware Frequency back to 1MHz

Any idea what is going on?

Any help is appreciated

  • Hi Frank,

    I am able to get it to work reliably at 16MHz

    Thanks

3 Replies

  • FvM's avatar
    FvM
    Icon for Super Contributor rankSuper Contributor

    Hi,

    sounds like your hardware doesn't support highest JTAG speed. Did you try a moderate setting like 6 MHz (original USB Blaster) or 12 - 20 MHz.

    Regards Frank

    • 3LionsCT's avatar
      3LionsCT
      Icon for Occasional Contributor rankOccasional Contributor

      Hi Frank,

      I am able to get it to work reliably at 16MHz

      Thanks

      • FakhrulA_altera's avatar
        FakhrulA_altera
        Icon for Regular Contributor rankRegular Contributor

        Hi,

        I’m glad that your question has been addressed, I now transition this thread to community support. If you have a new question, feel free to open a new thread to get the support from Altera Technical Support. Otherwise, the community users will continue to help you on this thread. Thank you.