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Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Error message "Invalid JTAG configuration" with SignalTap

I am using Quartus 10.1 on Win7. Configurating my Cyclone 3 FPGA with USB-Blaster works fine (downloading sof-file via SignalTap "SOF Manager" Button). But it is not possible to comunicate with th...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

do you have another instance of quartus open or did you still have the programmer module you used to upload the sof file? i've found been getting this error when this happens. Probably port contention between the different instances trying to access the usb-blaster port.

  • hyoun5's avatar
    hyoun5
    Icon for New Contributor rankNew Contributor
    6 years ago

    i've found been getting this error when this happens. Probably port contention between the different instances trying to access the usb-blaster port. <-

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    How do I fix this?

    I need your help.

    ​Thank You​

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