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Altera_Forum's avatar
Altera_Forum
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14 years ago

Trying to Simulate PLL MegaFunction In ModelSim

I'm pretty new to using modelsim. I have a really simple design with just a PLL, and I wanted to test it using modelsim. However, when I try to run the simulation I get an error stating the following:

Error: (vsim-3033) D:/altera/11.0/testproject/testpll_syn.v(141): Instantiation of 'testpll_altpll' failed. The design unit was not found.

I guess I'm missing something in my library? I'm pretty lost so if someone could point me in the right direction I'd really appreciate it.

3 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    14 years ago

    I assume that you're simulatin using Modelsim and a testbench.

    Are you sure the you instantiate design to be simulated using the verilog name otf the file that contains the PLL?

    Do you have in you design directory the files:

    altpll0.v altpllo.qip etcetera?
  • Altera_Forum's avatar
    Altera_Forum
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    14 years ago

    Yes, I have all those files in my design directory. And I'm pretty sure its being instantiated correctly.

  • Altera_Forum's avatar
    Altera_Forum
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    14 years ago

    Should be something simple.

    Can you devise what testpll_altpll is?

    Is it the top level entity of your design?

    Can you upload your testbench and the files that describe your design?