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how to instance array more efficiently

weihai

I create a skill code to layout array (only one dimension) like below.  Does the skill has any function code to layout the X-Y array?  Thanks a lot!

    fet_c_Inst = dbOpenCellView(pcLib "fet_center" "layout")
     fet_c = nil

    ;For loop to place nrow of instances
    for(instNumY 1 evalstring(nrow)    ;in Y direction
 
    ;Instantiate fet_center using calculated variables & user defined parameters
      nfet_c = append(nfet_c list(dbCreateParamInst(pcCV fet_c_Inst nil xLoc:yLoc "R0" instNumY paramList)))
    yLoc = yLoc + stepY
     ) ;; for

  • The Consultant

     Hi,

     

    u can use:

     

    dbCreateParamSimpleMosaic(pcCV fet_c_Instnil t_name xLoc:yLoc "R0" x_rows x_cols x_rowSpacing x_colSpacing paramList)

  • weihai

    Thanks for your reply.  The code works very well.   Another 2 questions,

    1. how to get the default value of x_rowSpacing and x_colSpacing like the virtuso does during instance an array of cells?

    2. what's the meaning of "t_name"?

  • Andrew Beckett

    It does it by finding the width and length of the bBox of the cell being instantiated. If it's a pcell, then you'd really have to instantiate it to find that out - so probably you'd end up using

    inst=dbCreateParamInst(...)
    bBox=inst~>bBox
    width=xCoord(upperRight(bBox))-xCoord(lowerLeft(bBox))
    height=yCoord(upperRight(bBox))-yCoord(lowerLeft(bBox))
    dbDeleteObject(inst)
    dbCreateParamSimpleMosaic(...)

    Regards,

    Andrew.

  • weihai

    Yes, I also did like this.  Thank you.

    Andrew Beckett said:

    It does it by finding the width and length of the bBox of the cell being instantiated. If it's a pcell, then you'd really have to instantiate it to find that out - so probably you'd end up using

    inst=dbCreateParamInst(...)
    bBox=inst~>bBox
    width=xCoord(upperRight(bBox))-xCoord(lowerLeft(bBox))
    height=yCoord(upperRight(bBox))-yCoord(lowerLeft(bBox))
    dbDeleteObject(inst)
    dbCreateParamSimpleMosaic(...)

    Regards,

    Andrew.

  • GUNEET
    in reply to The Consultant
    The Consultant said:
    paramList

    what is meaning of this list what do it changes in instances

  • Andrew Beckett
    in reply to GUNEET

    First of all, the forum guidelines (the pinned post at the  top of each forum) tell you not to post on the end of old threads (this is very old, 9 years old!). Secondly, this is explained in the documentation for this function (although I just noticed there's a mistake in the documentation as the example should have list(list("l" "float" 5.0)) as the last argument.

    The idea is that you pass a list of lists, where each sublist is a list of the parameter name, type and value. These parameters normally would be the pcell parameters for the instance you are trying to instantiate as a mosaic (at least the pcell parameters you wish to set).

    Andrew.

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