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Error- uninitialized virtual interface object

akshay jog
hi, I have following error when simulating some ovm code "uninitialized virtual interface object" Can some one explain to me , what does this error mean and how to fix it?? after this error message it shows me the line in my code so pasting that part of code as well //***************************** virtual task reset_signals(); @(negedge vmif.i_aresetn); // error at this line----------------------- //write address signals vmif.i_awid_m

  • Hi,

    A virtual interface is actually an uninitialized pointer that must always be connected to some real interface instance before it can be used. In your case you most probably didn't initalize the virtual interface.

    interface x();

    bit y; 

    endinteface

     

    module y();

    class z;

    virtual interface x x_vif; 

    endclass

    // actual interface instance 

    x x_if();

    initial

      begin

        z z_i = new();

        z_i.x_vif = x_if;

      end

    endmodule

     

    Avidan Efody

    Verifigen

    www.specman-verification.com 

     

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