Howto read port currents when having multi-terminal bus ports in VerilogA ?

This would have been much easier if you'd given a complete enough example to show the problem, and also which version of the simulator you're using. I used this:

//
i1 (n1 n2 n3 n4) qnrmesh2d
ahdl_include "herge.va"
dc dc

and

`include "disciplines.vams"

`define QNRMESH2D_NPORTS 2
 module qnrmesh2d(majport,minport);

   // Majority carriers terminals
   inout [1:`QNRMESH2D_NPORTS] majport;
   electrical [1:`QNRMESH2D_NPORTS] majport;

   // Minority carriers terminals
   inout [1:`QNRMESH2D_NPORTS] minport;
   electrical [1:`QNRMESH2D_NPORTS] minport;

   real Enorm[1:`QNRMESH2D_NPORTS];
   real Area[1:`QNRMESH2D_NPORTS];

   real Sigma_maj;

genvar thisPort;

analog begin
    @(initial_step) Sigma_maj=1.0;
    for (thisPort = 1; thisPort < `QNRMESH2D_NPORTS; thisPort = thisPort + 1) begin
        Area[thisPort]=1.0;
        Enorm[thisPort] = I(majport[thisPort])/(Area[thisPort]*Sigma_maj);
    end
end

endmodule

And this works fine - if I run "spectre herge.scs". I'm using  spectre version 11.1.0.366.isr7

Regards,

Andrew.

This also worked in  10.1.1.392.isr22

Andrew,

Yes, Andrew, the construct I(majport[thisPort]) works fine. But this returns in fact I(majport[thisPort],0). I have multiple branches connected to node majport[thisPort], and I am afraid that I(majport[thisPort]) will not return the sum of all currents through the module port majport[thisPort] but only what flows through branch I(majport[thisPort],0).

From my understanding of VerilogA, I was thinking I should use : I(<majport[thisPort]>)  -- which is the "(< . >)" port flow-access operator.

 Thanks. 

Herge,

Sorry, I cleaned that up when I was messing with the code - I thought it was just you highlighting the relevant part and removed it on auto-pilot, forgetting that this means the current through the port.

If you use the archaic syntax:

     //Enorm[thisPort] = I(<majport[thisPort]>)/(Area[thisPort]*Sigma_maj);
    Enorm[thisPort] = I(majport[thisPort],majport[thisPort])/(Area[thisPort]*Sigma_maj);

Then it compiles (with a warning that you should use <> instead...).

Please log this as a service request so that we can get this fixed. Hopefully you can use this as a workaround though.

Regards,

Andrew.

And when you log that service request, please reference this post on the forum to avoid the AE having to re-do the work... 

Thanks,

Andrew.

Created service request no 42907084.