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Altera_Forum's avatar
Altera_Forum
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8 years ago

NCO Simulation help

Hello,

I am new to FPGA/VHDL and I am trying to generate a sine wave using the Altera NCO IP Core. I have instantiated the IP component and I am using the test bench generated. When I try and simulate the design using modelsim I get numerous errors similar to the one below:

Error(suppressible): (Vsim-10000) nofile(39): unresolved defparam reference to 'acc' in acc.lpm direction.

Time : 0 ps iteration: 0 instance: /sine_ip_core/uo/nco_ii_0/ux000 File: nofile.

Does anyone have any suggestions to solving this issue?

Any help would be appreciated.

Kind regards

4 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    8 years ago

    Hi,

    1.Are using tcl scripts for setting up model-sim?

    I have tried to simulate it is working. with the help of tcl script generated and few comments.

    Can you share the screen short of the error.

    Attached model-sim transcript log file for reference.

    Best Regards,

    Anand Raj Shankar

    (This message was posted on behalf of Intel Corporation)
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    8 years ago

    The NCO core files are encrypted and can't be used by Modelsim. You need to generate a dedicated simulation model and - as I guess - import it manually in your simulation project.

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    8 years ago

    --- Quote Start ---

    Thanks for your response.

    I am simulating by setting the test bench file in Alteras simulation settings and then clicking Tools -> Run Simulation Tool -> RTL simulation. This prompts modelsim and then I get the following errors:

    https://www.alteraforum.com/forum/attachment.php?attachmentid=14621

    I have not encountered using TCL scripts to simulate as of yet...

    Kind regards

    --- Quote End ---

    Hi,

    1.While generating system(NCO), have you enable simulation?

    So that you can use scrip for loading the libraries which is easy to do.

    Refer the doc for steps:

    Best Regards,

    Anand Raj Shankar

    (This message was posted on behalf of Intel Corporation)