Stats

  • Locked Locked
  • Replies 6
  • Subscribers 126
  • Views 18047
  • 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

SKILL to modify layout parameter

40Ford

I have written SKILL functions to change or add parameters to a cellView. What I need to do now is grab the value of a parameter from a schematic and copy that value to the corresponding layout.

The parameter is called "connectivity" and I only want to change the value in cell "option". Yes, "option" is the cellName.

I know how to grab and instance and grab the property in SKILL but what I can't understand is how to know I'm getting the corresponding layout view for that instance.

 Any suggestions?

Parents

  • OK, there is a difference in the use of certain terms here. When you speak of a view, it is assumed that you are refering to the master of the cellView. The property would be on the master and would be the same no matter how many times the cell was instantiated. In your case, you want to modify the parameter on a layout instance based on the corresponding schematic instance.

    If you are using the VXL layout methodology, each instance in the schematic has an instance name and the layout has a corresponding  instance name (based on the hierarchy which was flattened from the schematic). I don't know if there is an exposed API for finding the corresponding named instances but the names are hierarchical with a pipe (|) as a separator.

    If you are not using VXL, you have to use some extraction tool to find the correspondence between the schematic and master. You will have to get more help to figure that one out.

    Ted

Reply

  • OK, there is a difference in the use of certain terms here. When you speak of a view, it is assumed that you are refering to the master of the cellView. The property would be on the master and would be the same no matter how many times the cell was instantiated. In your case, you want to modify the parameter on a layout instance based on the corresponding schematic instance.

    If you are using the VXL layout methodology, each instance in the schematic has an instance name and the layout has a corresponding  instance name (based on the hierarchy which was flattened from the schematic). I don't know if there is an exposed API for finding the corresponding named instances but the names are hierarchical with a pipe (|) as a separator.

    If you are not using VXL, you have to use some extraction tool to find the correspondence between the schematic and master. You will have to get more help to figure that one out.

    Ted

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.