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VerilogA $abstime limitation to 2pi

Ajmal Hussian

Hi,

I am developing a VeriolA module from which I want to get continuous angle in radian.

I am using the following code to get the angle

angle_in_rad = (current_velocity*$abstime + phi);

But I am facing a problem while limiting the value of abstime to 2pi.

Is it possible to limit $abstime to 2Pi? like the idt_mod operation.

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  • Andrew Beckett

    Create an analog function fmod like this (similar to the C function, but not part of the Verilog-A language):

    analog function real fmod;
    input num,den;
    real num,den;
    fmod=num-floor(num/den)*den;
endfunction 

analog begin
  angle_in_rad = fmod((current_velocity*$abstime + phi),`M_TWO_PI);
  $strobe(angle_in_rad);
end

    That will do what you want, I think. I'm not sure it's the $abstime you want to limit to 2 pi, but the angle_in_rad (I assume)?

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