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xariswon's avatar
xariswon
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5 years ago

Programmer/Altera JTAG Server Not Detecting USB Blaster

Hello everyone, For the last week or so, I have been unable to see my board connected via USB Blaster in the Altera programmer. I occasionally see it right after rebooting my computer, but it disap...
YuanLi_S_Intel's avatar
YuanLi_S_Intel
Icon for Regular Contributor rankRegular Contributor
5 years ago

Hi,


Is the JTAG working weeks before that? Any idea what are the changes to the PC right before the JTAG stop working?


Can you try to reinstall the JTAG?


Thank You.


Bruce


  • xariswon's avatar
    xariswon
    Icon for New Contributor rankNew Contributor
    5 years ago

    Sometimes the JTAG will work for a few days before it stops, sometimes only a few minutes. I have not found any particular pattern, like "after connecting this particular device" or "after running this particular software".

    I have *attempting* to completely uninstall and reinstall JTAG (and all of Quartus); however, it appears to use multiple drivers, so I am not 100% certain whether I am getting everything relevant.