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How to find the VXL binding of a transparent instance in the layout

dmay

In recent versions of VXL, you can use leHiMakeCell to create a transparent instance in the layout as an alternative to clone groups. The make cell command creates a new cell and can create clones of that cell with bindings to sets of instances in the schematic.

I am able to run bndGetBoundObjects on instances in the schematic and it will return the hierarchy that includes the transparent instance and the lower level instance. I am not able to do this from the layout side. If I pass in the transparent instances to this command (bndGetBoundObjects), I just get nil in return. Once caveat of this transparent instance is that it is placed into a figGroup. Passing this figGroup id to bndGetBoundObjects also returns nil. 

I'm looking for a way, starting from a transparent instance in the layout, to find the corresponding instances in the schematic. Since I can quickly find them in the layout using dbIsInstTransparent, it makes more sense to work in this direction. I know I can go through every instance in the schematic using bndGetBoundObjects to get to the same result, but most of the time we will not have many of these types of instances and that seems inefficient. 

Thanks,

Derek

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  • Andrew Beckett

    Derek,

    You can't pass the transparent instance itself, but you can pass the hierarchical path to all the instances within the transparent instance. So for example (if tinst is the instance id of the transparent instance):

    foreach(inst tinst~>master~>instances
      bound=bndGetBoundObjects(list(tinst inst))
      schInst=caaar(bound)
      printf("Name: %L\n" schInst~>name)
    )

    Andrew

Reply
  • Andrew Beckett

    Derek,

    You can't pass the transparent instance itself, but you can pass the hierarchical path to all the instances within the transparent instance. So for example (if tinst is the instance id of the transparent instance):

    foreach(inst tinst~>master~>instances
      bound=bndGetBoundObjects(list(tinst inst))
      schInst=caaar(bound)
      printf("Name: %L\n" schInst~>name)
    )

    Andrew

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