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Update Pcell parameter with skill

TeeBro

I need to update a pcell parameter in a layout; specifically the pcell revision parameter. I would like to open the layout and update all the instances from the process library to the latest revision.  I have included the following code that seems to work but I wanted to ask if there is a safer way to update this parameter and also if there is anything I'm omitting in the update process that may be a problem.  I know that different pcell revisions have new layers/parameters that are added and I'm thinking there might be another step I'm missing. Note: this code assumes that the defValue param is the latest rev.

procedure( updatePcellRevs( lib cell view pLib)
    let ( cv targetObjs paramIQ )
        cv=dbOpenCellViewByType( lib cell view "" "a")
        targetObjs=setof(x cv~>instances x~>libName==pLib)
        if( targetObjs then
            foreach( inst targetObjs
                if( paramIQ=cdfFindParamByName(cdfGetInstCDF(inst),"pcellRev") then
                    if( paramIQ~>value==paramIQ~>defValue then
                        printf("No update needed.\n" nil )
                    else
                        if( cdfUpdateInstSingleParam(inst,paramIQ) then
                            printf("Changing \"%s\": %s --> %s\n" paramIQ~>prompt paramIQ~>paramIQ~>value paraIQ~>defValue )
                        else
                            printf("ERROR --> Parameter update failed!\n" nil )
                        ); close if
                    ); close if
                ); close if
            ); close foreach
        ); close if
        dbSave(cv)
        dbClose(cv)
    ); close let
); close procedure

  • This seems reasonable enough (although I've never used cdfUpdateInstSIngleParam - the documentation is a little sparse on this to say the least, so I assume it resets it back to the effective "value" which is usually the same as the defValue assuming somebody hasn't messed around with the effective CDF in the session).

    Andrew.

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