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Updating existing layout in VXL using SKILL

Kaggarwa

I have a layout which is partially complete in VXL. The schematic got changed and I have few more instances to place in each layout. I see that this can be done using "Create ~> pick from schematic" and then selecting the instances.

Is there a way to replicate this process using SKILL , so that I dont have to open each layout to do this. I already have a routine that gives me the list of instances to be placed in each layout.

I tried to instantiate these using dbCreateInst() but then I dont get the flyline connectivity between the inital instances and the new one. Can someone please help ?

Regards,

kamala 

Parents

  • The only command I am aware of is an interactive command: lxHiCreateInstFromSch()
    Running this command is no different from invoking it from the Cadence menu. Putting the above commands in a procedure should not be too difficult unless you have parasitic devices in the schematic that you want to short through. If you look at instances in the schematic, you can see that they all already have instTerms, so you just need to create the layout equivalents.

    From an instance in the schematic, you can get everything you need:

    Select an instance in the schematic:
    inst = css()
    foreach(it inst~>instTerms
        printf("Inst Name: %s  Term name: %s  Net Name %s\n" inst~>name it~>term~>name it~>net~>name)
    )

    -Derek

Reply

  • The only command I am aware of is an interactive command: lxHiCreateInstFromSch()
    Running this command is no different from invoking it from the Cadence menu. Putting the above commands in a procedure should not be too difficult unless you have parasitic devices in the schematic that you want to short through. If you look at instances in the schematic, you can see that they all already have instTerms, so you just need to create the layout equivalents.

    From an instance in the schematic, you can get everything you need:

    Select an instance in the schematic:
    inst = css()
    foreach(it inst~>instTerms
        printf("Inst Name: %s  Term name: %s  Net Name %s\n" inst~>name it~>term~>name it~>net~>name)
    )

    -Derek

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