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Auto contact SKILL function

Yaosan

Can someone please point me to the SKILL function used to invoke the auto contact feature (i.e. create via -> auto) in Virtuoso? I would like to use this function to automatically insert vias instead of doing it by manually clicking where I want the auto via to appear.

If there is no such public SKILL function available (any idea why?), can someone please suggest how should I go about coding such a function myself. I'm thinking of using dbLayerAnd, dbGetOverlap etc. to find the intersection area, but I'm not sure if I can traverse the hierarchy and get the shapes and net underneath the intersection area.

Any feedback will be greatly appreciated! Thanks!
Parents

  • Hi Yaosan,

    Yes, the code just transforms the bounding box, not the shapes themselves. If I have understood your problem correctly, you are wanting to create a via at the intersection of two appropriately overlapping shapes in the layout, whether these shapes are present at level 0, or at other levels.  Perhaps I am oversimplifying this, but I would have thought that the layers and the dimensions of the overlap is what is important (and not the net information?).  You might be able to copy the shapes or Yank and Paste the section of interest to a "scratch" cellview, i.e. one that is in virtual memory only and not save-able, for further processing.  By the way, in addition to the leLayer.* SKILL functions, there are also dbLayer.* functions, such as dbLayerAnd() which accept shapes for their input, this might be very useful to you.

    Regards,

    Lawrence.

Reply

  • Hi Yaosan,

    Yes, the code just transforms the bounding box, not the shapes themselves. If I have understood your problem correctly, you are wanting to create a via at the intersection of two appropriately overlapping shapes in the layout, whether these shapes are present at level 0, or at other levels.  Perhaps I am oversimplifying this, but I would have thought that the layers and the dimensions of the overlap is what is important (and not the net information?).  You might be able to copy the shapes or Yank and Paste the section of interest to a "scratch" cellview, i.e. one that is in virtual memory only and not save-able, for further processing.  By the way, in addition to the leLayer.* SKILL functions, there are also dbLayer.* functions, such as dbLayerAnd() which accept shapes for their input, this might be very useful to you.

    Regards,

    Lawrence.

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