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How to deposit simulation result into a file?

Alex Liao

Hi, I am wondering is there a way to save an output into a file, like a .txt which it is easy to read from.

 

Specifically, in the "Setting outputs" of Virtuoso Analog Design Environment (ADE) I have: 

Name: PhaseMargin

Expression: (phaseMargin((VF("/Vout") / (VF("/Vin+") - VF("/Vin-")))) + 180)

 

After simulation, I got 80 degree displayed.

But is there a way to save this '80' into a .txt file?

I am using SpectreS as the simulator. I think there are some commands to output results.

 

Any answer is appreciated.

Thanks,

Alex


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  • skillUser

     Hi Alex,

    Why are you using SpectreS I wonder, instead of the more current Spectre ? I have not seen anyone using SpectreS in years and I am pretty rusty on the details (e.g. the flow used, and how the netlist differs from a 'spectre direct' netlist).  Unless you are strongly tied to SpectreS for some reason I would recommend migrating to Spectre if you - there's not anything wrong with it, but it is really old (and may not even be currently supported?).

    Q1 - you did not say why/how the ocnPrint() command did not work.  You can use an OCEAN script with the results from a command-line spectre run, you need to tell OCEAN where the results are using the openResults() command - you may get some warnings but you should be able to read the results from the appropriate psf directory (give the path to the 'psf' directory including the psf at the end of the path).  You can try to develop the script interactively and type commands at the ocean> prompt, so you can open the results and then check to see if you can select the ac, dcOp or dc results set (selectResult() command with either 'ac or "ac" as an argument, for example). The ocnPrint() command should do what you want (NOTE: do not use ?numberNotation 'none for a scalar result, this is currently broken).

     

    Q2 - Yes, the design() command in OCEAN is how to either point to the lib/cell/view to be used, or the 'raw' netlist for that design - if the former method is used then OCEAN can renetlist the design, otherwise it will just use the raw netlist provided.   I cannot remember if you said which version you are using but if it is IC61x then the command line version of ocean can netlist, but if using IC5x then you would need to be in 'icfb' or similar in order to perform netlisting.  As noted above I'm rusty on the spectreS flow, but I would guess that the "USE" statement is equivalent to an include statement.

    Hope this helps!

    Lawrence.

Reply
  • skillUser

     Hi Alex,

    Why are you using SpectreS I wonder, instead of the more current Spectre ? I have not seen anyone using SpectreS in years and I am pretty rusty on the details (e.g. the flow used, and how the netlist differs from a 'spectre direct' netlist).  Unless you are strongly tied to SpectreS for some reason I would recommend migrating to Spectre if you - there's not anything wrong with it, but it is really old (and may not even be currently supported?).

    Q1 - you did not say why/how the ocnPrint() command did not work.  You can use an OCEAN script with the results from a command-line spectre run, you need to tell OCEAN where the results are using the openResults() command - you may get some warnings but you should be able to read the results from the appropriate psf directory (give the path to the 'psf' directory including the psf at the end of the path).  You can try to develop the script interactively and type commands at the ocean> prompt, so you can open the results and then check to see if you can select the ac, dcOp or dc results set (selectResult() command with either 'ac or "ac" as an argument, for example). The ocnPrint() command should do what you want (NOTE: do not use ?numberNotation 'none for a scalar result, this is currently broken).

     

    Q2 - Yes, the design() command in OCEAN is how to either point to the lib/cell/view to be used, or the 'raw' netlist for that design - if the former method is used then OCEAN can renetlist the design, otherwise it will just use the raw netlist provided.   I cannot remember if you said which version you are using but if it is IC61x then the command line version of ocean can netlist, but if using IC5x then you would need to be in 'icfb' or similar in order to perform netlisting.  As noted above I'm rusty on the spectreS flow, but I would guess that the "USE" statement is equivalent to an include statement.

    Hope this helps!

    Lawrence.

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