Forum Discussion

Mikexx's avatar
Mikexx
Icon for Occasional Contributor rankOccasional Contributor
2 years ago

Clock missing from Timing Analyzer - Report Setup Summary

I have a clock mux along the lines in "ug-qps-03-design-recommendations.pdf" I have set the output clock to be a Global Clock in the Assignment Editor and I give it's minimum period in the sdc file....
Timing
sstrell's avatar
sstrell
Icon for Super Contributor rankSuper Contributor
2 years ago

What are all those false paths you've created? Are you preventing analysis on the paths that are clocked by HDMI_TX_CLK?

Run Report Timing and specify you're looking for paths clocked by this clock.

Mikexx's avatar
Mikexx
Icon for Occasional Contributor rankOccasional Contributor
2 years ago

Those false paths were the ones setup in Timing Analyzer by default and placed in the sdc file. All I did was add HDMI_TX_CLK into the "Create Clock" group in the sdc file.

I have no idea why it would do that and I don't recognise the names.

  • sstrell's avatar
    sstrell
    Icon for Super Contributor rankSuper Contributor
    2 years ago

    So you should run detailed timing reports with Report Timing, setting the launch or latch clock as HDMI_TX_CLK to find paths clocked by this clock domain.

    • Mikexx's avatar
      Mikexx
      Icon for Occasional Contributor rankOccasional Contributor
      2 years ago

      Thanks.

      If I go to Custom Reports -> Report Timing I an enter HDMI_TX_CLK into the from and to clock. These exist in the pull-down option.

      I placed * in the targets entry, leave it blank, or add all registers in the design. I get "Nothing to report" for all options.

      Not sure if it makes a difference bu I'm using Quartus Prime Version 20.1.0 Build 711 06/05/2020 SJ Lite Edition