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symbol PCELL extraction issue.

fishbulb15
I have created a symbol, schematic and layout pcell. Everything seemed to be working correctly until I wanted to start LVS-ing the the pcell. I first ran into an issue where it required that my schematic be extracted since last edit. So I followed the instructions here: ___Schematic PCell: Schematic cellviews modified since last extracted___ support.cadence.com/.../ ------->Which seemed to solve that issue. But now I am getting "ERROR: Netlister: symbol of instance modified, please re-extract cell ''." Is there something like : dbCreateProp(pcCellView "schGeometryLastRecorded" "time" getCurrentTime() ) dbCreateProp(pcCellView "lastSchematicExtraction" "time" getCurrentTime() ) to add to the symbol pcell?? How can I get this to work.. Thank you, Mitchell Cohen
Parents

  • Hi Mitchell,

    Try this code - it works for me in IC5141 - I can place an instance and CDL it out with no issues. You'll probably need to change the lib name near the top of the code, which is where it places the new "busset" pcell.

    Regards,

    Andrew.

    /* busset.il

Author     A.D.Beckett
Group      Custom IC, Cadence Design Systems Ltd.
Machine    SUN
Date       Jul 11, 2004 
Modified   
By         

SKILL code for creating the "busset" pcell schematic, symbol,
and the CDF as well.

***************************************************

SCCS Info: @(#) busset.il 04/20/11.13:51:09 1.2

*/

let( (library cell pcellId)
    library="training"
    cell="busset"
    unless(ddGetObj(library)
        error("Couldn't open library %L" library)
    )

    ;--------------------------------------------------------------------
    ; First the schematic
    ;--------------------------------------------------------------------
    pcellId=pcDefinePCell(
        list(ddGetObj(library) cell "schematic" "schematic")

        ;----------------------------------------------------------------
        ; Formal parameters
        ;----------------------------------------------------------------
        (
            (buswidth 6)
            (busvalue 0)
        )

        ;----------------------------------------------------------------
        ; Code itself
        ;----------------------------------------------------------------
        let(( cv master instId netH netL 
            busOut driveName driveNet)

        cv = pcCellView
        ;----------------------------------------------------------------
        ; Convert parameters, and figure out drive net name
        ;----------------------------------------------------------------
        when(buswidth<1 buswidth=1)
        for(bit 0 buswidth-1
            if(driveName then
                driveName=strcat("," driveName)
            else
                driveName=""
            ) ; if
            driveName=strcat(
                if(busvalue<bit>==1 "hi" "lo")
                driveName
            )
        ) ; for

        ;----------------------------------------------------------------
        ; open master cell view
        ;----------------------------------------------------------------
        master = dbOpenCellViewByType( "basic" "cds_thru" "symbol" nil "r" )
        ;----------------------------------------------------------------
        ; create the nets
        ;----------------------------------------------------------------
        netH=dbMakeNet(cv "hi")
        netL=dbMakeNet(cv "lo")
        busOut=dbMakeNet(cv sprintf(nil "bus<%d:0>" buswidth-1))
        driveNet=dbMakeNet(cv driveName)
        ;----------------------------------------------------------------
        ; create the terminals
        ;----------------------------------------------------------------
        dbCreateTerm(netH netH~>name "inputOutput")
        dbCreateTerm(netL netL~>name "inputOutput")
        dbCreateTerm(busOut busOut~>name "inputOutput")
        ;----------------------------------------------------------------
        ; create the instance of cds_thru
        ;----------------------------------------------------------------
        instId = 
            dbCreateInst(
                cv master sprintf(nil "thru<%d:0>" buswidth-1)
                0:0 "R0"
            )
        ;----------------------------------------------------------------
        ; Connect it up
        ;----------------------------------------------------------------
        dbCreateConnByName(busOut instId "dst");
        dbCreateConnByName(driveNet instId "src");

        ;----------------------------------------------------------------
        ; Make the connectivity look up to date - not always needed, but
        ; Assura needs this, for example.
        ;----------------------------------------------------------------
        dbSetConnCurrent(cv)

        dbClose( master )
        t
        ) ; let
    )
    dbSave(pcellId)
    dbClose(pcellId) 

    ;--------------------------------------------------------------------
    ; Now the symbol
    ;--------------------------------------------------------------------
    pcellId=pcDefinePCell(
        list(ddGetObj(library) cell "symbol" "schematicSymbol")

        ;----------------------------------------------------------------
        ; Formal parameters
        ;----------------------------------------------------------------
        (
            (buswidth 6)
            (busvalue 0)
        )

        ;----------------------------------------------------------------
        ; Code itself
        ;----------------------------------------------------------------
        let(( cv netH netL 
            busOut figH figL figBus hp ps pl bw lh
            pxc label)

        cv = pcCellView

        ;----------------------------------------------------------------
        ; Various dimensions
        ;----------------------------------------------------------------
        ; half pin size
        hp=0.025
        ; pin spacing
        ps=0.125
        ; pin length
        pl=0.250
        ; box width
        bw=1.4375
        ; label height
        lh=0.0625
        ; param label x coord
        pxc=0.5

        ;----------------------------------------------------------------
        ; create the shapes - first the pins
        ;----------------------------------------------------------------
        figH = dbCreateRect(cv list("pin" "drawing") list(-hp:-hp hp:hp)) 
        dbCreateLine(cv list("device" "drawing") list(0:0 pl:0))
        figL = dbCreateRect(cv list("pin" "drawing") list(-hp:-ps-hp hp:-ps+hp))
        dbCreateLine(cv list("device" "drawing") list(0:-ps pl:-ps))
        figBus = dbCreateRect(cv list("pin" "drawing")
            list(2*pl+bw-hp:-hp 2*pl+bw+hp:hp)
        ) ; dbCreateRect
        dbCreateLine(cv list("device" "drawing") list(pl+bw:0 2*pl+bw:0))
        ;----------------------------------------------------------------
        ; Then the boxes
        ;----------------------------------------------------------------
        dbCreateRect(cv list("device" "drawing") list(pl:-2*ps pl+bw:ps))
        dbCreateRect(cv list("instance" "drawing") list(0:-2*ps 2*pl+bw:ps))

        ;----------------------------------------------------------------
        ; create the nets
        ;----------------------------------------------------------------
        netH=dbMakeNet(cv "hi")
        netL=dbMakeNet(cv "lo")
        busOut=dbMakeNet(cv sprintf(nil "bus<%d:0>" buswidth-1))
        ;----------------------------------------------------------------
        ; create the terminals
        ;----------------------------------------------------------------
        dbCreateTerm(netH netH~>name "inputOutput")
        dbCreateTerm(netL netL~>name "inputOutput")
        dbCreateTerm(busOut busOut~>name "inputOutput")
        ;----------------------------------------------------------------
        ; create the pins
        ;----------------------------------------------------------------
        dbCreatePin(netH figH)
        dbCreatePin(netL figL)
        dbCreatePin(busOut figBus)

        ;----------------------------------------------------------------
        ; Put some labels for the pins
        ;----------------------------------------------------------------
        dbCreateLabel(cv list("pin" "drawing") pl+ps/2:0
            netH~>name "centerLeft" "R0" "stick" lh)
        dbCreateLabel(cv list("pin" "drawing") pl+ps/2:-ps
            netL~>name "centerLeft" "R0" "stick" lh)
        dbCreateLabel(cv list("pin" "drawing") bw+pl-ps/2:0
            busOut~>name "centerRight" "R0" "stick" lh)

        ;----------------------------------------------------------------
        ; And other symbol labels
        ;----------------------------------------------------------------
        label=dbCreateLabel(cv list("annotate" "drawing7") bw+pl-ps/2:ps*1.5
            "cdsName()" "centerRight" "R0" "stick" lh)
        label~>labelType="ILLabel"
        label=dbCreateLabel(cv list("annotate" "drawing") pxc:0
            "cdsParam(1)" "centerLeft" "R0" "stick" lh)
        label~>labelType="ILLabel"
        label=dbCreateLabel(cv list("annotate" "drawing") pxc:-ps
            "cdsParam(2)" "centerLeft" "R0" "stick" lh)
        label~>labelType="ILLabel"

        t
        ) ; let
    )
    dbSave(pcellId)
    dbClose(pcellId) 

;------------------------------------------------------------------------
; Now create the CDF
;------------------------------------------------------------------------
    let( (cellId cdfId )
        unless( cellId = ddGetObj( library cell )
            error( "Could not get cell %s." cell )
        )
        when( cdfId = cdfGetBaseCellCDF( cellId )
            cdfDeleteCDF( cdfId )
        )
        cdfId  = cdfCreateBaseCellCDF( cellId )

        ;;; Parameters
        cdfCreateParam( cdfId
            ?name           "buswidth"
            ?prompt         "Bus Width"
            ?defValue       6
            ?type           "int"
            ?display        "t"
        )
        cdfCreateParam( cdfId
            ?name           "busvalue"
            ?prompt         "Bus Value"
            ?defValue       0
            ?type           "int"
            ?display        "t"
        )

        ;;; Simulator Information
        cdfId->simInfo = list( nil )
        cdfId->simInfo->UltraSim = '( nil )
        cdfId->simInfo->ams = '( nil )
        cdfId->simInfo->auCdl = '( nil )
        cdfId->simInfo->auLvs = '( nil )
        cdfId->simInfo->cdsSpice = '( nil )
        cdfId->simInfo->hspiceD = '( nil )
        cdfId->simInfo->hspiceS = '( nil )
        cdfId->simInfo->spectre = '( nil )
        cdfId->simInfo->spectreS = '( nil )

        ;;; Properties
        cdfId->formInitProc            = ""
        cdfId->doneProc                = ""
        cdfId->buttonFieldWidth        = 340
        cdfId->fieldHeight             = 35
        cdfId->fieldWidth              = 350
        cdfId->promptWidth             = 175
        cdfId->paramLabelSet           = "buswidth busvalue"
        cdfId->paramDisplayMode        = "parameter"
        cdfId->paramEvaluate           = "t nil nil nil nil"
        cdfSaveCDF( cdfId )
    ) ; let
) ; let

     

Reply

  • Hi Mitchell,

    Try this code - it works for me in IC5141 - I can place an instance and CDL it out with no issues. You'll probably need to change the lib name near the top of the code, which is where it places the new "busset" pcell.

    Regards,

    Andrew.

    /* busset.il

Author     A.D.Beckett
Group      Custom IC, Cadence Design Systems Ltd.
Machine    SUN
Date       Jul 11, 2004 
Modified   
By         

SKILL code for creating the "busset" pcell schematic, symbol,
and the CDF as well.

***************************************************

SCCS Info: @(#) busset.il 04/20/11.13:51:09 1.2

*/

let( (library cell pcellId)
    library="training"
    cell="busset"
    unless(ddGetObj(library)
        error("Couldn't open library %L" library)
    )

    ;--------------------------------------------------------------------
    ; First the schematic
    ;--------------------------------------------------------------------
    pcellId=pcDefinePCell(
        list(ddGetObj(library) cell "schematic" "schematic")

        ;----------------------------------------------------------------
        ; Formal parameters
        ;----------------------------------------------------------------
        (
            (buswidth 6)
            (busvalue 0)
        )

        ;----------------------------------------------------------------
        ; Code itself
        ;----------------------------------------------------------------
        let(( cv master instId netH netL 
            busOut driveName driveNet)

        cv = pcCellView
        ;----------------------------------------------------------------
        ; Convert parameters, and figure out drive net name
        ;----------------------------------------------------------------
        when(buswidth<1 buswidth=1)
        for(bit 0 buswidth-1
            if(driveName then
                driveName=strcat("," driveName)
            else
                driveName=""
            ) ; if
            driveName=strcat(
                if(busvalue<bit>==1 "hi" "lo")
                driveName
            )
        ) ; for

        ;----------------------------------------------------------------
        ; open master cell view
        ;----------------------------------------------------------------
        master = dbOpenCellViewByType( "basic" "cds_thru" "symbol" nil "r" )
        ;----------------------------------------------------------------
        ; create the nets
        ;----------------------------------------------------------------
        netH=dbMakeNet(cv "hi")
        netL=dbMakeNet(cv "lo")
        busOut=dbMakeNet(cv sprintf(nil "bus<%d:0>" buswidth-1))
        driveNet=dbMakeNet(cv driveName)
        ;----------------------------------------------------------------
        ; create the terminals
        ;----------------------------------------------------------------
        dbCreateTerm(netH netH~>name "inputOutput")
        dbCreateTerm(netL netL~>name "inputOutput")
        dbCreateTerm(busOut busOut~>name "inputOutput")
        ;----------------------------------------------------------------
        ; create the instance of cds_thru
        ;----------------------------------------------------------------
        instId = 
            dbCreateInst(
                cv master sprintf(nil "thru<%d:0>" buswidth-1)
                0:0 "R0"
            )
        ;----------------------------------------------------------------
        ; Connect it up
        ;----------------------------------------------------------------
        dbCreateConnByName(busOut instId "dst");
        dbCreateConnByName(driveNet instId "src");

        ;----------------------------------------------------------------
        ; Make the connectivity look up to date - not always needed, but
        ; Assura needs this, for example.
        ;----------------------------------------------------------------
        dbSetConnCurrent(cv)

        dbClose( master )
        t
        ) ; let
    )
    dbSave(pcellId)
    dbClose(pcellId) 

    ;--------------------------------------------------------------------
    ; Now the symbol
    ;--------------------------------------------------------------------
    pcellId=pcDefinePCell(
        list(ddGetObj(library) cell "symbol" "schematicSymbol")

        ;----------------------------------------------------------------
        ; Formal parameters
        ;----------------------------------------------------------------
        (
            (buswidth 6)
            (busvalue 0)
        )

        ;----------------------------------------------------------------
        ; Code itself
        ;----------------------------------------------------------------
        let(( cv netH netL 
            busOut figH figL figBus hp ps pl bw lh
            pxc label)

        cv = pcCellView

        ;----------------------------------------------------------------
        ; Various dimensions
        ;----------------------------------------------------------------
        ; half pin size
        hp=0.025
        ; pin spacing
        ps=0.125
        ; pin length
        pl=0.250
        ; box width
        bw=1.4375
        ; label height
        lh=0.0625
        ; param label x coord
        pxc=0.5

        ;----------------------------------------------------------------
        ; create the shapes - first the pins
        ;----------------------------------------------------------------
        figH = dbCreateRect(cv list("pin" "drawing") list(-hp:-hp hp:hp)) 
        dbCreateLine(cv list("device" "drawing") list(0:0 pl:0))
        figL = dbCreateRect(cv list("pin" "drawing") list(-hp:-ps-hp hp:-ps+hp))
        dbCreateLine(cv list("device" "drawing") list(0:-ps pl:-ps))
        figBus = dbCreateRect(cv list("pin" "drawing")
            list(2*pl+bw-hp:-hp 2*pl+bw+hp:hp)
        ) ; dbCreateRect
        dbCreateLine(cv list("device" "drawing") list(pl+bw:0 2*pl+bw:0))
        ;----------------------------------------------------------------
        ; Then the boxes
        ;----------------------------------------------------------------
        dbCreateRect(cv list("device" "drawing") list(pl:-2*ps pl+bw:ps))
        dbCreateRect(cv list("instance" "drawing") list(0:-2*ps 2*pl+bw:ps))

        ;----------------------------------------------------------------
        ; create the nets
        ;----------------------------------------------------------------
        netH=dbMakeNet(cv "hi")
        netL=dbMakeNet(cv "lo")
        busOut=dbMakeNet(cv sprintf(nil "bus<%d:0>" buswidth-1))
        ;----------------------------------------------------------------
        ; create the terminals
        ;----------------------------------------------------------------
        dbCreateTerm(netH netH~>name "inputOutput")
        dbCreateTerm(netL netL~>name "inputOutput")
        dbCreateTerm(busOut busOut~>name "inputOutput")
        ;----------------------------------------------------------------
        ; create the pins
        ;----------------------------------------------------------------
        dbCreatePin(netH figH)
        dbCreatePin(netL figL)
        dbCreatePin(busOut figBus)

        ;----------------------------------------------------------------
        ; Put some labels for the pins
        ;----------------------------------------------------------------
        dbCreateLabel(cv list("pin" "drawing") pl+ps/2:0
            netH~>name "centerLeft" "R0" "stick" lh)
        dbCreateLabel(cv list("pin" "drawing") pl+ps/2:-ps
            netL~>name "centerLeft" "R0" "stick" lh)
        dbCreateLabel(cv list("pin" "drawing") bw+pl-ps/2:0
            busOut~>name "centerRight" "R0" "stick" lh)

        ;----------------------------------------------------------------
        ; And other symbol labels
        ;----------------------------------------------------------------
        label=dbCreateLabel(cv list("annotate" "drawing7") bw+pl-ps/2:ps*1.5
            "cdsName()" "centerRight" "R0" "stick" lh)
        label~>labelType="ILLabel"
        label=dbCreateLabel(cv list("annotate" "drawing") pxc:0
            "cdsParam(1)" "centerLeft" "R0" "stick" lh)
        label~>labelType="ILLabel"
        label=dbCreateLabel(cv list("annotate" "drawing") pxc:-ps
            "cdsParam(2)" "centerLeft" "R0" "stick" lh)
        label~>labelType="ILLabel"

        t
        ) ; let
    )
    dbSave(pcellId)
    dbClose(pcellId) 

;------------------------------------------------------------------------
; Now create the CDF
;------------------------------------------------------------------------
    let( (cellId cdfId )
        unless( cellId = ddGetObj( library cell )
            error( "Could not get cell %s." cell )
        )
        when( cdfId = cdfGetBaseCellCDF( cellId )
            cdfDeleteCDF( cdfId )
        )
        cdfId  = cdfCreateBaseCellCDF( cellId )

        ;;; Parameters
        cdfCreateParam( cdfId
            ?name           "buswidth"
            ?prompt         "Bus Width"
            ?defValue       6
            ?type           "int"
            ?display        "t"
        )
        cdfCreateParam( cdfId
            ?name           "busvalue"
            ?prompt         "Bus Value"
            ?defValue       0
            ?type           "int"
            ?display        "t"
        )

        ;;; Simulator Information
        cdfId->simInfo = list( nil )
        cdfId->simInfo->UltraSim = '( nil )
        cdfId->simInfo->ams = '( nil )
        cdfId->simInfo->auCdl = '( nil )
        cdfId->simInfo->auLvs = '( nil )
        cdfId->simInfo->cdsSpice = '( nil )
        cdfId->simInfo->hspiceD = '( nil )
        cdfId->simInfo->hspiceS = '( nil )
        cdfId->simInfo->spectre = '( nil )
        cdfId->simInfo->spectreS = '( nil )

        ;;; Properties
        cdfId->formInitProc            = ""
        cdfId->doneProc                = ""
        cdfId->buttonFieldWidth        = 340
        cdfId->fieldHeight             = 35
        cdfId->fieldWidth              = 350
        cdfId->promptWidth             = 175
        cdfId->paramLabelSet           = "buswidth busvalue"
        cdfId->paramDisplayMode        = "parameter"
        cdfId->paramEvaluate           = "t nil nil nil nil"
        cdfSaveCDF( cdfId )
    ) ; let
) ; let

     

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