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Getting devices instance model, terminals and nets

dragank

Hi all.

I am using Virtuoso IC6.1.8-64b.500.17.

I am trying to use:

https://community.cadence.com/cadence_technology_forums/f/custom-ic-skill/41566/config-view-assignment/1360121#1360121

code to find all devices in hierarchy when top view is config view.

For each device i need to extract model name, terminals and for each terminal I need to get net name.

At most I can get so far is name of the device with pcdbInstName.

I am facing similar issue with:

I tried to apply get(inst "model") and get(inst "terminals") and they all return nil.

CCFgetHierModelNames works fine when top view is schematic view, but I have scenario when top view is config view also.

Any help would be appreciated.

Best regards,

Dragan

  • The code in the articles and posts is mostly concerned with gathering views used - but if you want to find the instance from a specific containing cellView, you'd do either foreach(inst cv~>instances ...) or inst=dbFindAnyInstByName(cv instName). Having done that, assuming the model name follows the usual convention, you'd use inst~>model and for the connections, you'd use inst~>instTerms and then inst~>instTerms~>net~>name 

    Andrew

  • in reply to Andrew Beckett

    One of the main issues I have is how to get "cv" argument for

    inst = dbFindAnyInstByName(cv instName)

    I would really avoid reinventing the wheel while having mentioned examples existing.

    But they all operate with lib/cell/view names.

    Best regards,

    Dragan

  • in reply to dragank

    What's wrong with using dbOpenCellViewByType() with the lib/cell/view?

    Andrew

  • in reply to Andrew Beckett

    So far I can not list instances.

    Best regards,

    Dragan

  • in reply to dragank

    Is the master lib/cell/view what you think it is? I’m not sure how this interfaces to any of the other code mentioned before, but maybe you’re opening the symbol view not the schematic (the switched or bound view )?

    I can’t check much because I’ve just boarded a plane and am answering on my phone. The code looks broadly reasonable though other than that. It’s a bit odd using sprintf and then println the result rather than just using printf, but that wouldn’t be the issue of course!

    Andrew

  • in reply to Andrew Beckett

    Library, cell, and view are correct.

    Code is navigating to MOSFETs as expected.

    I managed to get to terminals and nets in the following way:

    Now I got another issue.

    terminal->net->name is equal to terminal->name,

    so I can not tell to which net MOSFET electrodes are connected (gates especially) and that is main purpose of the script.

    Best regards,

    Dragan

  • in reply to dragank

    Thank you Andrew.

    As You mentioned "maybe you’re opening the symbol view" was the issue.

    Script now gives correct outputs.

    Best regards,

    Dragan

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