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skill code to find out VIA coordinates from given layout

Gunwant

Hi,

Can someone tell me skill code to extract VIA locations from given layout ? e.g I have metal 5 and metal 6 in my layout and i m mainly interested in knowing VIA5 locations. Is there skill code to get this ?

Parents
  • Sheppy

    Hi Gunwant,

    Please find below a little procedure that goes through all cells in a given library and reports a few details about vias in a cellview.

    procedure( extractViaInformationInLibrary( libName "S" )
      let( ( ( libDbId nil )
        ( cellName "" )
        ( viewName "" )
        ( cellView nil )
        ( viewType "" ) )
        printf( "Going through all cells in library %L to find via's and report their details...\n" libName )
        ;;; Getting the information (database ID) for the library...
        libDbId = ddGetObj( libName )

        ;;; Search in all cells of given library, if library exists...
        when( libDbId
          foreach( cell libDbId~>cells
            cellName = cell~>name
            foreach( view cell~>views
              viewName = view~>name
              cellView = dbOpenCellViewByType( libName cellName viewName nil "r" )
              viewType = dbGetq( cellView cellViewType )
              when( equal( viewType "maskLayout" ) && cellView~>vias
                printf("This is a valid cell-view WITH vias: %L %L %L\n" libName cellName viewName )
                foreach( via cellView~>vias
                  printf( "    Via details: type = %L | origin = %L | orientation = %L | connectivity = %L\n" via~>viaHeader~>viaDefName via~>origin via~>orient via~>net~>name )
                )
              ) ;;; end of when viewType
            ) ;;; end of foreach view
          ) ;;; end of foreach cell
        ) ;;; end of when libDbId
        t
      ) ;;; end of let
    ) ;;; end of procedure extractViaInformationInLibrary

    Load the code and run it by doing this:

    extractViaInformationInLibrary( "your_library_name" )

    This will give you some information about all vias in the library.

    With kind regards,

    Sjoerd

Reply
  • Sheppy

    Hi Gunwant,

    Please find below a little procedure that goes through all cells in a given library and reports a few details about vias in a cellview.

    procedure( extractViaInformationInLibrary( libName "S" )
      let( ( ( libDbId nil )
        ( cellName "" )
        ( viewName "" )
        ( cellView nil )
        ( viewType "" ) )
        printf( "Going through all cells in library %L to find via's and report their details...\n" libName )
        ;;; Getting the information (database ID) for the library...
        libDbId = ddGetObj( libName )

        ;;; Search in all cells of given library, if library exists...
        when( libDbId
          foreach( cell libDbId~>cells
            cellName = cell~>name
            foreach( view cell~>views
              viewName = view~>name
              cellView = dbOpenCellViewByType( libName cellName viewName nil "r" )
              viewType = dbGetq( cellView cellViewType )
              when( equal( viewType "maskLayout" ) && cellView~>vias
                printf("This is a valid cell-view WITH vias: %L %L %L\n" libName cellName viewName )
                foreach( via cellView~>vias
                  printf( "    Via details: type = %L | origin = %L | orientation = %L | connectivity = %L\n" via~>viaHeader~>viaDefName via~>origin via~>orient via~>net~>name )
                )
              ) ;;; end of when viewType
            ) ;;; end of foreach view
          ) ;;; end of foreach cell
        ) ;;; end of when libDbId
        t
      ) ;;; end of let
    ) ;;; end of procedure extractViaInformationInLibrary

    Load the code and run it by doing this:

    extractViaInformationInLibrary( "your_library_name" )

    This will give you some information about all vias in the library.

    With kind regards,

    Sjoerd

Children
  • Purge2343
    in reply to Sheppy

    Hey 

    is it possible to use the same structure to get the metal information? 

  • Andrew Beckett
    in reply to Purge2343

    What do you mean by "metal information"? I'm assuming that since you asked another question in this post, we'll discuss it there instead.

    Andrew

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