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bhunt's avatar
bhunt
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3 years ago
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Simulation problem with Avalon-MM clock crossing bridge

Hi there, I'm using the avalon MM clock-crossing bridge with questasim. After generating the core in Quartus Prime, I compile it in questasim with no issues. However, in simulation, all of its output ports are stuck at X.
  • bhunt's avatar
    bhunt
    2 years ago

    I found that the IP simulation model outputs X normally, after reset, until the first transaction is passed through it. Then the IP outputs stay non-X.

6 Replies

  • KennyT_altera's avatar
    KennyT_altera
    Icon for Super Contributor rankSuper Contributor

    Kindly take note that they will be some slowness on the first reply due to the public holiday, we will get back to you as soon as possible.



  • SyafieqS's avatar
    SyafieqS
    Icon for Super Contributor rankSuper Contributor

    Are you writing any testbench? mind to share it here the snippet? and also the snapshot in the questasim.


    • bhunt's avatar
      bhunt
      Icon for New Contributor rankNew Contributor

      I found that the IP simulation model outputs X normally, after reset, until the first transaction is passed through it. Then the IP outputs stay non-X.

  • SyafieqS's avatar
    SyafieqS
    Icon for Super Contributor rankSuper Contributor

    Understood. Any testbench written for this simulation? Mind to share here if there is any.

    If there is any input value assigned to the input there should be a value outputted.


  • SyafieqS's avatar
    SyafieqS
    Icon for Super Contributor rankSuper Contributor

    May I know if there is any update from previous reply?


  • SyafieqS's avatar
    SyafieqS
    Icon for Super Contributor rankSuper Contributor

    As we do not receive any response from you on the previous question/reply/answer that we have provided. 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.


    p/s: If any answer from community or Intel support are helpful, please feel free to mark as solution, give Kudos and rate 5/5 survey