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

Change the default USB Blaster II Hardware Frequency?

Hi,

My USB blaster will not work at the default hardware frequency of 24MHz but works fine at 16MHz.  I have to change it every time in the programmer or when using Signal tap. Is there a parameter within Quartus that will make it default to 16MHz rather than 24MHz. 

Thanks

 

Configuration

3 Replies

  • FvM's avatar
    FvM
    Icon for Super Contributor rankSuper Contributor
    18 days ago

    Hi,
    .
    apparently there's no feature to store a frequency setting permanently. Interestingly Arrow-USB-Blaster stores the default in Registry. Actual frequency can be modified with jtagconfig --setparam, but it's reset to default when cable is plugged in oder Jtagserver restarted. You also need to know the cable number if you have more than one cable attached.

    "jtagconfig --setparam 1 JtagClock 16M" could be e.g. called in post compilation flow as a workaround.

    Regards
    Frank

    • 3LionsCT's avatar
      3LionsCT
      Icon for Occasional Contributor rankOccasional Contributor
      18 days ago

      Hi Frank,

      That's what I figured. I saw the command line instruction but at that point its just easier to change it in the programming GUI

      Sees like a feature that would be good to add to Quartus in the future!

      Regards

       

      • Farabi's avatar
        Farabi
        Icon for Regular Contributor rankRegular Contributor
        13 days ago

        I will file CR (feature request) to engineering for future improvement. 

         

        regards,

        Farabi