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Reading PCell Properties/Parameters using SKILL

frasheed

 Hello All,

I have a PCell that has nfet layout and I am writing a SKILL code to open the layout and label the Gate, Drain, Source and Bulk in layout. For that I need to read the parameters that where is the Gate, Drain and Sourcein layout. I tried some commands like :

pcGetParameters , pcGetParamLabelDefn, pcGetParamLabels, pcGetParamLayers but all of them are given me "Nil". Can anyone help me what's wrong ? Is it because the PCell doesn't have any properties ?

or is there any better way for labeling ?

Thanks

P.S: I didn't created that PCell and I am very beginner to SKILL.

 

Parents

  • Hi,

    I'm still a bit confused - in one sentence you say that the PCell instantiates an nfet, and then in another you say that the nfet cell is a PCell (and both of these could be true, since a PCell can contain an instance of another PCell...).

    Never mind though, it should not matter too much.  Your code might look something like this:

    procedure(CCFaddInstPinLabels(@optional (cellView geGetEditCellView()))
let( (transform pinCenter)
  foreach( inst cellView~>instances
    transform=inst~>transform
    foreach( instTerm inst~>instTerms
      foreach( pin instTerm~>term~>pins
        pinCenter=centerBox(pin~>fig~>bBox)
        dbCreateLabel(cellView list("text" "drawing")
          dbTransformPoint(pinCenter transform)
          strcat("n" instTerm~>name)
          "centerCenter"
          "R0" "stick"
	  0.0625
        ); dbCreateLabel
      ); foreach pin
    ); foreach instance terminal
  ); foreach instance
);let
); procedure CCFaddInstPinLabels

    Hopefully this is close to what you want?  It creates a label "n<terminalName>" on the center of each pin figure of the instances in the current cellview when you invoke CCFaddInstPinLabels() in the CIW.

    Regards,

    Lawrence.

Reply

  • Hi,

    I'm still a bit confused - in one sentence you say that the PCell instantiates an nfet, and then in another you say that the nfet cell is a PCell (and both of these could be true, since a PCell can contain an instance of another PCell...).

    Never mind though, it should not matter too much.  Your code might look something like this:

    procedure(CCFaddInstPinLabels(@optional (cellView geGetEditCellView()))
let( (transform pinCenter)
  foreach( inst cellView~>instances
    transform=inst~>transform
    foreach( instTerm inst~>instTerms
      foreach( pin instTerm~>term~>pins
        pinCenter=centerBox(pin~>fig~>bBox)
        dbCreateLabel(cellView list("text" "drawing")
          dbTransformPoint(pinCenter transform)
          strcat("n" instTerm~>name)
          "centerCenter"
          "R0" "stick"
	  0.0625
        ); dbCreateLabel
      ); foreach pin
    ); foreach instance terminal
  ); foreach instance
);let
); procedure CCFaddInstPinLabels

    Hopefully this is close to what you want?  It creates a label "n<terminalName>" on the center of each pin figure of the instances in the current cellview when you invoke CCFaddInstPinLabels() in the CIW.

    Regards,

    Lawrence.

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