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How to find floating metals/vias using skill code

prasadtammana

Hi, 

I'm writing a script to draw a metal ring around my block, from METAL1 to METAL6. And then I'm dropping via's using auto via script. Depending on the existing metals in the layout, my script chops the metal ring to not create shorts with the existing metals. The final metal ring sometimes will have floating metals. Is it possible to find floating metals and via's that are not connected to M1 using script without writing any rule files? 

Thanks,

Prasad

  • You might want to have a look at this support article:

    https://support.cadence.com/apex/ArticleAttachmentPortal?id=a1Od0000000nZh8EAE&pageName=ArticleContent

    SKILL to find and select floating, isolated wires or shapes and vias in VXL environment (which does not have net attribute) and then manually decide to delete it or not

    /************************************************************************* 
    * DISCLAIMER: The following code is provided for Cadence customers       * 
    * to use at their own risk. The code may require modification to         * 
    * satisfy the requirements of any user. The code and any modifications   * 
    * to the code may not be compatible with current or future versions of   * 
    * Cadence products. THE CODE IS PROVIDED "AS IS" AND WITH NO WARRANTIES, * 
    * INCLUDING WITHOUT LIMITATION ANY EXPRESS WARRANTIES OR IMPLIED         * 
    * WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE.         * 
    *************************************************************************/

    procedure(CCSselDanglingShp(@optional (cv geGetEditCellView()))
    let((mlist vlist)
    mlist=setof(sh cv~>shapes !sh~>net && sh~>purpose != "label")
    vlist = setof(via cv~>vias !via~>net)

    if(mlist
            then
            printf("Dangling wires found at %L\n" mlist~>bBox )
            geSelectFigs(mlist)
            else
            printf("No dangling wires found \n" )
            )
    if(vlist
            then
            printf("Dangling vias found at %L\n" vlist~>bBox)
            geSelectFigs(vlist)
            else
            printf("No dangling via found \n")
            )
    ))

    hiSetBindKey("Layout" "<Key>F10" "CCSselDanglingShp()")

  • in reply to AurelBuche

    Thank you so much, it helped me to fix my problem. 

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