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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

  • A parameter and a property are two distinct objects, a parameter is assigned to pcells as the interface to the pcell program. A property is a way to assign data to a database object like a cellView master or an instance.

    I am assuming you are assigning a property to a cellView master. When you find the instance, you are assigning/adding/getting the value of the property on the instance's master cellView. That cellView master in the schematic is a symbol view. The symbol view should have corresponding views in the same library for layout and schematic. If the layout is in another library or goes by another name, you have to follow your design group methodology to get the correct library/cell name. Once you have determined the name of the layout cellView, you can open that master using dbOpenCellViewByType with "a" for append. Then you can add the property using dbReplaceProp on the cellView ID.

     masterId = dbOpenCellViewByType( instId~>libName "option" "layout" nil "a" )

    dbReplaceProp( masterId  "connectivity" 'string "new value" )

    dbSave( masterId )

     I hope I understood what you needed to do.

    Ted

Reply

  • A parameter and a property are two distinct objects, a parameter is assigned to pcells as the interface to the pcell program. A property is a way to assign data to a database object like a cellView master or an instance.

    I am assuming you are assigning a property to a cellView master. When you find the instance, you are assigning/adding/getting the value of the property on the instance's master cellView. That cellView master in the schematic is a symbol view. The symbol view should have corresponding views in the same library for layout and schematic. If the layout is in another library or goes by another name, you have to follow your design group methodology to get the correct library/cell name. Once you have determined the name of the layout cellView, you can open that master using dbOpenCellViewByType with "a" for append. Then you can add the property using dbReplaceProp on the cellView ID.

     masterId = dbOpenCellViewByType( instId~>libName "option" "layout" nil "a" )

    dbReplaceProp( masterId  "connectivity" 'string "new value" )

    dbSave( masterId )

     I hope I understood what you needed to do.

    Ted

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