Stats

  • Locked Locked
  • Replies 6
  • Subscribers 143
  • Views 17583
  • Members are here 0
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

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 Lawrence,

    Yes, you are right about the requirement to drop vias between 2 overlapping shapes, I do not need to know the net in order for the vias to be created. However, I would like to automate some of the via dropping without user manually clicking on those intersecting areas, and only through net connectivity will the code be able to know where to drop these vias.

    Of course, making a simplified via dropping function that traverse hierarchy is the first step i.e. ignore net connectivity. After that I'll see if I can extend this function to account for net connectivity.

    Thanks for your feedback, working in "scratch" cellview is definitely the way to go if I do flatten or yank the design.

Reply

  • Hi Lawrence,

    Yes, you are right about the requirement to drop vias between 2 overlapping shapes, I do not need to know the net in order for the vias to be created. However, I would like to automate some of the via dropping without user manually clicking on those intersecting areas, and only through net connectivity will the code be able to know where to drop these vias.

    Of course, making a simplified via dropping function that traverse hierarchy is the first step i.e. ignore net connectivity. After that I'll see if I can extend this function to account for net connectivity.

    Thanks for your feedback, working in "scratch" cellview is definitely the way to go if I do flatten or yank the design.

Children
No Data

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.