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Yamada1's avatar
Yamada1
Icon for Occasional Contributor rankOccasional Contributor
3 years ago
Solved

About Clock Constraints

I want to apply a timing constraint, but when I create an SDC file and try to specify it with create clock or click the List button on the Name Finder, I get the error "Error: In order to edit SDC constraints, you must first run the Create Timing Netlist command in the Timing Analyzer to view the list of available nodes." and I cannot select a signal.

It was the same even if it was implemented with a design that had completed up to Timing Analysis.

Registering the SDC file to Quartus while it is empty and running create clock did not change the situation.

Any advice would be appreciated.

  • IntelSupport's avatar
    IntelSupport
    3 years ago

    You can just compile to have the timing netlist during (post map/post fit). In Timing Analysis, there should be able to detect the clock you specify in sdc. Also I suggest you to migrate to latest Quartus for better usability and there lot of bug/fix.


7 Replies

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

    As the error states, you have to create a timing netlist to use those features. This is separate from compiling the design. The timing netlist is based on completed stages of compilation, either synthesis or fitting. It's a database of timing information based on a stage of compilation and is required for working with the tool.

  • Yamada1's avatar
    Yamada1
    Icon for Occasional Contributor rankOccasional Contributor
    3 years ago

    Thank you for answering.

    I understand that even if Start Compilation is completed up to Timing Analysis, a timing netlist will not be created.

    I also checked here, but is the following procedure correct for creating a timing netlist?

    1) Start Timing Analyzer

    2) Netlist → Create Timing Netlist on the Timing Analyzer

    At the stage up to synthesis, the above procedure will also fail with a message telling you to complete the fitting.

    It would be helpful if you could also teach us the procedure for creating a timing netlist at the stage of completing synthesis.

    I apologize for the inconvenience, but it would be helpful if you could teach me.

    • sstrell's avatar
      sstrell
      Icon for Super Contributor rankSuper Contributor
      3 years ago
      Are you using Standard (Lite) or Pro? If Pro, you have to have completed at least the Plan stage of the Fitter. In Standard you can create a post-synthesis timing netlist. This is not available in Pro.
  • Yamada1's avatar
    Yamada1
    Icon for Occasional Contributor rankOccasional Contributor
    3 years ago

    Thank you for answering.

    The Quartus I am using is the Standard Edition.

    The device used is Arria10 GX, and the version of Quartus is 18.1.1. For the time being, we will proceed with the design after the fitter is completed.

    I apologize for the inconvenience, but it would be helpful if you could teach me.

  • IntelSupport's avatar
    IntelSupport
    Icon for Contributor rankContributor
    3 years ago

    You can just compile to have the timing netlist during (post map/post fit). In Timing Analysis, there should be able to detect the clock you specify in sdc. Also I suggest you to migrate to latest Quartus for better usability and there lot of bug/fix.


  • IntelSupport's avatar
    IntelSupport
    Icon for Contributor rankContributor
    3 years ago

    I’m glad that your question has been addressed, I now transition this thread to community support. If you have a new question, Please login to ‘https://supporttickets.intel.com’, view details of the desire request, and post a feed/response within the next 15 days to allow me to continue to support you. After 15 days, this thread will be transitioned to community support. The community users will be able to help you on your follow-up questions.

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