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pcell parameter order

Yaosan Yeo
I used the GUI based method to create a pcell. When I use it in my layout, the parameters seem to be in random order. Is there an easy way to arrange them in a specific order e.g. alphabetically?
Parents
  • Yaosan Yeo

    Thanks Andrew and Lawrence, defining CDF solves my problem.

    I used some SKILL code to generate the initial CDF from the pcell's parameters, then I used the Edit CDF GUI to set the parameter's order, which works perfectly.

    procedure( ysGenPcellCDF(libName cellName viewName)
    let( ( cellView p params cdf )
    cellView = dbOpenCellViewByType( libName cellName viewName )

    ; get list of parameters
    unless( p = car( exists( prop cellView->prop prop->name == "parameters" ) )
    error( "No parameters found for '%s:%s' in '%s'" cellName viewName libName )
    )

    params = p->prop

    when( cdf = cdfGetCellCDF( ddGetObj( libName cellName ) )
    cdfDeleteCDF(cdf) ; remove old CDF
    )

    cdf = cdfCreateBaseCellCDF( ddGetObj( libName cellName ) )

    foreach( param params
    cdfCreateParam( cdf
    ?name param->name
    ?type lowerCase(param->valueType)
    ?prompt param->name
    ?defValue param->value
    )
    )
    ))

Reply
  • Yaosan Yeo

    Thanks Andrew and Lawrence, defining CDF solves my problem.

    I used some SKILL code to generate the initial CDF from the pcell's parameters, then I used the Edit CDF GUI to set the parameter's order, which works perfectly.

    procedure( ysGenPcellCDF(libName cellName viewName)
    let( ( cellView p params cdf )
    cellView = dbOpenCellViewByType( libName cellName viewName )

    ; get list of parameters
    unless( p = car( exists( prop cellView->prop prop->name == "parameters" ) )
    error( "No parameters found for '%s:%s' in '%s'" cellName viewName libName )
    )

    params = p->prop

    when( cdf = cdfGetCellCDF( ddGetObj( libName cellName ) )
    cdfDeleteCDF(cdf) ; remove old CDF
    )

    cdf = cdfCreateBaseCellCDF( ddGetObj( libName cellName ) )

    foreach( param params
    cdfCreateParam( cdf
    ?name param->name
    ?type lowerCase(param->valueType)
    ?prompt param->name
    ?defValue param->value
    )
    )
    ))

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