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Design Languages >> Verilog-AMS >> file write
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Message started by kamath on Sep 30^th, 2012, 9:34am

Title: file write
Post by kamath on Sep 30^th, 2012, 9:34am

Hi All,

I have a circuit whose node voltage is being saved into file in Virtuoso.

I am able to open a file and store the same. The problem is when I run a parametric sweep of a given variable lets say x=1:10, I get all the data into one single file. i would ideally want a file dataX.txt where X is 1:10 for each run.

I checked the concatenation method in Verilog-A and been able to reach until a point where i am unable to find the right typecasting for X. Is there a way to do this to string from integer in verilog-a.

Regards
Kamath

Title: Re: file write
Post by Geoffrey_Coram on Oct 1^st, 2012, 6:35am

Some simulators may support sprintf. It's not mentioned explicitly in the LRM, but many features from 1364 Verilog or 1800 System Verilog are available in Verilog-AMS.

Title: Re: file write
Post by kamath on Oct 3^rd, 2012, 7:34am

Thanks Geoffrey.

Yes $fstrobe or $sprintf works for writing.

I was trying to know the parametric sweep number via verilog-a block than going for ocean. But may be I will have to check it by having an external file with the counter number since the schematic is re-run during every sim.

Regards
Kamath

Title: Re: file write
Post by Geoffrey_Coram on Oct 10^th, 2012, 2:40pm

I was thinking about using $sprintf to write to a string, generating the filename. But I suppose that requires not just $sprintf but also support for strings and an $fopen that can take a variable string argument (not just a fixed string literal).