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  3. How to update the netlist (input.scs) from extracted view...

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How to update the netlist (input.scs) from extracted view after QRC extraction

Mamad
Mamad over 6 years ago

Hi,

I am going to change the layout, then do PVS LVS and later PVS QRC to get the extracted view of the layout. In the next step I plan to do simulation in command line. If "input.scs" is ready by using spectre command it is easy to do the simulation. However, after the layout extraction I do not know how to generate the new netlist from command line.

Would you please help me to figure out this problem?

Thanks for your help

Mohammad 

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  • Andrew Beckett
    Andrew Beckett over 6 years ago

    Hi Mohammad,

    You can do this with an OCEAN script:

    simulator('spectre)
    design("libName" "cellName" "viewName")
    createNetlist(?display nil)

    Regards,

    Andrew.

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  • Mamad
    Mamad over 6 years ago in reply to Andrew Beckett

    Hi Andrew,

    Thank you very much for your help. It works fine.

    Usually Ocean scripts are slow, would you please let me know if there is other ways other than Ocean? 

    Thanks 

    Mohammad 

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  • Andrew Beckett
    Andrew Beckett over 6 years ago in reply to Mamad

    Hi Mohammad,

    I'm not sure why you are saying that it would be slow. OCEAN is not inherently slow, and especially in this case you're just telling it to netlist the design - which would be the same however you did it. You have to create the netlist somehow - it's going to be just as fast to do it this way as any other.

    Andrew.

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  • Mamad
    Mamad over 6 years ago in reply to Andrew Beckett

    Hi Andrew,

    Thanks for your reply. I do not know what is the reason I always feel OCEAN is slow. Maybe because I am running OCEAN from the server. I am thinking it maybe because of loading several files in OCEAN, or invoking the license from the server. For example, if I run simulation from OCEAN it would be slow, however Spectre is very fast.  

    Please let me know if you have any idea about this issue?

    Regards

    Mohammad 

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  • Andrew Beckett
    Andrew Beckett over 6 years ago in reply to Mamad

    No, I don't know why this should be. One key difference is that it echos the simulator output into the CIW which can be slow in some versions. Perhaps you need to use:

    envSetVal( "asimenv.misc" "includeSimLogInOCEAN" 'boolean nil)

    That suppresses that output. This environment variable was only introduced in IC616 ISR6 (6.1.6.500.6) so if you're using an older version, you won't have that option.

    Regards,

    Andrew

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  • Mamad
    Mamad over 6 years ago in reply to Andrew Beckett

    Hi Andrew,

    Thanks for your reply. I tried the command you suggest, our Cadence version is the the latest one however I got the error "Unmatched '." when I run this command on command line.

    Would you please let me know if you can help me to find the problem?

    Best Wishes 

    Mohammad 



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  • Mamad
    Mamad over 6 years ago in reply to Andrew Beckett

    Hi Andrew,

    Thanks for your reply. I tried the command you suggest, our Cadence version is the the latest one however I got the error "Unmatched '." when I run this command on command line.

    Would you please let me know if you can help me to find the problem?

    Best Wishes 

    Mohammad 



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  • Andrew Beckett
    Andrew Beckett over 6 years ago in reply to Mamad

    Hi Mohammad,

    That's because you would need to type it in the CIW, not the UNIX command line. Or you should put it in your OCEAN script at the beginning.

    Regards,

    Andrew.

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  • Mamad
    Mamad over 6 years ago in reply to Andrew Beckett

    Hi Andrew,

    Thanks for your help. I tried to type the command in CIW and also ocean, but there is another error " *Error* eval: not a function - "asimenv.misc" " for both of them. 

    Please let me know if you have a solution for this problem.

    Regards

    Mohammad 

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  • Andrew Beckett
    Andrew Beckett over 6 years ago in reply to Mamad

    My guess is that you put a space between envSetVal and the open parenthesis. That’s not allowed (and wasn’t there in what I posted above). SKILL (for various good reasons) doesn’t allow that.

    So please try it without the space. 

    Regards,

    Andrew

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  • Mamad
    Mamad over 6 years ago in reply to Andrew Beckett

    You are right, now it works. I appreciate your help.

    Regards

    Mohammad 

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