Forum Discussion

AGofs's avatar
AGofs
Icon for Occasional Contributor rankOccasional Contributor
6 years ago

CycloneV PLL and PLL reconfig simulation

I've generated PLL and PLL_reconfig function with Quartus18.1.

The PLL receives 20 MHz and sends out 25 MHz. I want to change the frequency of the outcoming signal from 25 MHz to 50 MHz.

I'm new with CycloneV and with Quartus18.1

8 Replies

  • AGofs's avatar
    AGofs
    Icon for Occasional Contributor rankOccasional Contributor

    I cannot implement simulation not in Model-Sim nor in Native Link.

    N.B. I've read AN-661. Is it necessary to use AVALON-MM?

  • AGofs's avatar
    AGofs
    Icon for Occasional Contributor rankOccasional Contributor

    Good evening,

    I still have a problem with simulation.

    When I'm trying to simulate Altera PLL and Altera PLL Reconfig Mega-Function via Native Link I'm getting the following error:

  • AGofs's avatar
    AGofs
    Icon for Occasional Contributor rankOccasional Contributor

    # ** Error: (vcom-7) Failed to open design unit file "C:/Alex/my_designs/18_1/PLL_reconfig/PLL_reconfig_001/cycloneV/PLL_RECONFIG_20_25.vho" in read mode.

    # No such file or directory. (errno = ENOENT)

  • AGofs's avatar
    AGofs
    Icon for Occasional Contributor rankOccasional Contributor

    Indeed, there is no such a file. But I have get PLL_20_25.vho for Altera PLL Mega-Function, and PLL_RECONFIG_20_25.hdl for Altera PLL Reconfig Mega-Function. Why file . vho doesn't generate for Altera PLL Reconfig Mega-Function?How can I control it? When I'm trying to simulate the design via Model-Sim10.5B, then no waveform generated by Altera PLL before reconfig and after reconfig.

  • AGofs's avatar
    AGofs
    Icon for Occasional Contributor rankOccasional Contributor

    Hi JwChin,

    thank you for your replay.

    I've simulated my projects (include PLL dynamic phase shift) via Native-Links many times .

    The question is another: in order to simulate via Native-Link , Quartus shall produce xxx .vho file for Altera PLL Reconfig Mega-Function.

    But it doesn't.

    The file xxx.vho Altera PLL Mega-Function has been generated Instead.

    why? Is it wrong? How can simulate frequency reconfiguration on CycloneV?

  • AGofs's avatar
    AGofs
    Icon for Occasional Contributor rankOccasional Contributor

    Hi JwChin,

    I found the way to execute simulation directly via ModelSim-10.1.

    I think, you can close the case. :-)