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Altera_Forum's avatar
Altera_Forum
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15 years ago

Using LPM components in Megawizard

Hi,

I am newbie to altera Megawizard and want to create a design using lpm_counter. I opened Megawizard and created lpm_counter as per the manual. It craetes files like counter.v, counter_inst.v and counter_bb.v. In file counter.v there is instatiation of lpm_counter.

lpm_counter lpm_counter_component(

)

When i try to simulate counter.v in modelsim, then there is error

design 'lpm_counter' is not found.

From where i can found component 'lpm_counter' ? If i have to specify some library, then where it is located ? I cannot figure it out through manuals.

Regards

Pankaj

9 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    15 years ago

    On my Quartus v9.1 for Linux system it is in /opt/altera9.1/modelsim_ase/altera/verilog/220model

  • Altera_Forum's avatar
    Altera_Forum
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    15 years ago

    I'm facing a similar kind of problem. I instantiated an altmf_addsub core produced through Megawizard in my design. When I try to simulate this design through Nativelink in Modelsim I get the error in modelsim:

    Module 'add_subfunc' is not defined.

    "add_subfunc" is the name I gave to the created core. I used Nativelink feature previously for single precision multiply and it worked flawlessly without any input from me in the modelsim. I'm guessing this has something to do with lpm simulation library, since at the last screen megawizard shows it as a requirement for simulation.
  • Altera_Forum's avatar
    Altera_Forum
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    15 years ago

    --- Quote Start ---

    I'm facing a similar kind of problem. I instantiated an altmf_addsub core produced through Megawizard in my design. When I try to simulate this design through Nativelink in Modelsim I get the error in modelsim:

    Module 'add_subfunc' is not defined.

    "add_subfunc" is the name I gave to the created core. I used Nativelink feature previously for single precision multiply and it worked flawlessly without any input from me in the modelsim. I'm guessing this has something to do with lpm simulation library, since at the last screen megawizard shows it as a requirement for simulation.

    --- Quote End ---

    Hi Guy's,

    be aware that the LPM's will be no longer supported by Quartus. Quartus 9.1 is the last version which fully support the LPM's.

    Kind regards

    GPK
  • Altera_Forum's avatar
    Altera_Forum
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    15 years ago

    Are you trying an RTL simulation or a Gate Level simulation?

    Sometimes the RTL does not work while the Gate Level works.

    Try this and let me know
  • Altera_Forum's avatar
    Altera_Forum
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    15 years ago

    @pletz,

    Does this mean I can no longer use megafunctions in my design and simulate them. Surely not! :(

    @nplttr,

    I am trying RTL simulation. I'll try gate level simulation right now!
  • Altera_Forum's avatar
    Altera_Forum
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    15 years ago

    Same error with gate level simulations as well.

    I tried to run Gate level simulation and it asked me to run Netlist writer first.

    So, I did a full compilation of the project and then tried to run Gate level, this time I was able to successfully launch Modelsim but got the same error as with RTL simulation as in my first post:

    Module 'add_subfunc' is not defined.

    What to do?
  • Altera_Forum's avatar
    Altera_Forum
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    15 years ago

    --- Quote Start ---

    @pletz,

    Does this mean I can no longer use megafunctions in my design and simulate them. Surely not! :(

    @nplttr,

    I am trying RTL simulation. I'll try gate level simulation right now!

    --- Quote End ---

    Hi,

    we are only talking about the LPM function. With Quartus 10.0 they ar no longer available

    in the Megawizard. As long as you will not change the LPM you can run P&R. If you need to

    change same you have to go back to version 9.1.

    Here what you can found in the release notes of Quartus 10.0:

    The MegaWizard Plug-In Manager no longer supports the

    following megafunctions: ALT3PRAM, ALTACCUMULATE,

    ALTGXB, ALTSHIFT_TAPS, ALTSQRT, LPM_ABS,

    LPM_ADD_SUB, LPM_AND, LPM_COMPARE, LPM_CONSTANT,

    LPM_COUNTER, LPM_DECODE, LPM_DIVIDE, LPM_FF,

    LPM_FIFO+, LPM_INV, LPM_LATCH, LPM_MUX, LPM_OR,

    LPM_RAM_DP, LPM_RAM_DP+, LPM_RAM_DQ, LPM_ROM,

    LPM_SHIFTREG, and LPM_XOR. You can compile designs that

    include the above megafunctions in the Quartus II software

    version 10.0, but you cannot create new instances or edit

    existing variations of these megafunctions.

    Kind regards

    GPK