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Instantiate a device with terminal names (SKILL)

PietroUser

I have the following code to instantiate an nmos transistor in a schematic:

 ; Open the CV to create
cvId=dbOpenCellViewByType("Test_Structures" "Rects1" "schematic" "schematic" "w")
 ; Open the master cell to instatiate
mosId = dbOpenCellViewByType("analogLib" "nmos4" "symbol" "schematicSymbol" "r")


Inst=dbCreateInst(cvId mosId nil '(0 0) "R0" 1)
;schCreateWire( cvId "draw" "full" list(0:0 1:0) 0.0625 0.0625 0.0 )
;schCreateWireLabel(

;to save and close:
dbSave(cvId)
dbClose(cvId)

 

I would like to add wires and labels to obtain the result as in the attached picture.

Thanks,

Pietro

 

 

 

 

Parents
  • skillUser

    Hi Pietro,

    I don't have an exact example to hand, but the code section below may help you 

    ...
inst=dbCreateInst(cvId mosId nil '(0 0) "R0" 1)

;; put the wire stubs in yourself using schCreateWire in 'direct' mode
;; then create the labels - you might wish to attach the labels to the
;; wire segments, in which case, use schCreateWireLabel as above and
;; provide the wire as the 'd_glue' argument

;; this just creates labels right on the center of the instance pins
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

    The main thing here is that the pin center is obtained in the code above - you would need to work out which direction to extend the wire in and perhaps place the label along the wire, but the above should give you a good starting point.

    Regards,

    Lawrence.

Reply
  • skillUser

    Hi Pietro,

    I don't have an exact example to hand, but the code section below may help you 

    ...
inst=dbCreateInst(cvId mosId nil '(0 0) "R0" 1)

;; put the wire stubs in yourself using schCreateWire in 'direct' mode
;; then create the labels - you might wish to attach the labels to the
;; wire segments, in which case, use schCreateWireLabel as above and
;; provide the wire as the 'd_glue' argument

;; this just creates labels right on the center of the instance pins
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

    The main thing here is that the pin center is obtained in the code above - you would need to work out which direction to extend the wire in and perhaps place the label along the wire, but the above should give you a good starting point.

    Regards,

    Lawrence.

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