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3LionsCT's avatar
3LionsCT
Icon for Occasional Contributor rankOccasional Contributor
2 months 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
    2 months 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
      2 months 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
        1 month ago

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

         

        regards,

        Farabi