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Design Languages >> Verilog-AMS >> verilogA error: ARnow: Undefined variable.
https://designers-guide.org/forum/YaBB.pl?num=1164576914

Message started by xter on Nov 26^th, 2006, 1:35pm

Title: verilogA error: ARnow: Undefined variable.
Post by xter on Nov 26^th, 2006, 1:35pm

Hi,

I have verilogA code that works when run in cadence spectre, but not in Hspice. It's included as a subckt.

I) In attempting to debug this problem, I commented out everything except the port definitions. The code is saved in a file called stage5.va:

`include "constants.vams"
`include "disciplines.vams"

module p_stage3_calib_model(VDD, Ph1, Ph2, Vrefp, Vrefn, Vip, Vin, D0M, D0L, S1, S0, Vop, Von);
input Vip, Vin, Ph1, Ph2, Vrefp, Vrefn, VDD;
output S1,
output D0M, D0L;
output Vop, Von;
endmodule;

II) The instantiation looks like this:

yistage5 vdd1 Q1 Q2 vrefp vrefn vo6_p vo6_n d5l d5m SwitchRefHiStg5 SwitchRefLoStg5 vo5_p vo5_n p_stage3_calib_model

III) In the .lis file, the error reads like this:

During .hdl command processing, loading Verilog-A modules from
'./stage5.va'.
hsp-vacomp:
hsp-vacomp: Invoking the Verilog-A compiler for 'stage5.va'

** error **
During Verilog-A Device processing:
Failed to compile the Verilog-A File,
'stage5.va'.

IV) And at the command prompt, I get this error:

ARnow: Undefined variable.

I am out of things to try to debug this problem. I thought if I slowly worked through the code, I could isolate this undefined variable, but I took out everything, and still get it.

Anyone have this error before?

Thanks!
Xter

Title: Re: verilogA error: ARnow: Undefined variable.
Post by Geoffrey_Coram on Nov 27^th, 2006, 5:04am

Two things that jump out at me:
1) comma at the end of
output S1,
should be a semicolon

2) In HSpice, VA instances must use 'x' (not 'y') as the first character of the instance name:

yistage5 vdd1 Q1 ...

Neither seems directly related to your problem, though.

Title: Re: verilogA error: ARnow: Undefined variable.
Post by xter on Nov 27^th, 2006, 8:31am

Hi,

1. The comma is a typo from the paste. It is a semi-colan in code.

2. I did switch it to x.. as the instance name, same error. [The reason I left it as y... was because I netlisted in HspiceD in analog design environment, and used that netlist. I figured if it was automatically netlisted then there would be less errors introduced by me.]

Is there perhaps a version of hspice I should be using? I am currently using VY-2006.09 on a linux machine.

Thanks,
Xter

Title: Re: verilogA error: ARnow: Undefined variable.
Post by xter on Nov 27^th, 2006, 8:41am

Hi,

I seem to have solved the problem. A co-worker mentioned the OS might matter, so I ran on a unix machine. This time I had more informative error messages and was able to easily debug.

Thanks for taking the time to reply to this message.

Cheers!
Xter