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Skill for DFT Check - Checks for Testpoint to Assembly outline based on PACKAGE_HEIGHT_MAX

Fadi81

Hi All,

I am new to skill programming and I am trying to create a skill file that does the following:

Purpose:

DFT Audit, to check for clearance between testpoints ( any pin or via that is assigned as a testpoint by TestPrep) and components based on max component height attached to PLACEBOUND TOP or BOTTOM.

Description:

I have the following rules for testpoint to components ASSEMBLY TOP or BOTTOM

1. For components placed on the TOP side

if component height is < 50 then testpoint to assembly TOP outline spacing should be >=47 mils

if component height is > 50 and < 250 then testpoint to assembly TOP outline spacing should be >=68 mils

if component height is > 250 then testpoint to assembly TOP outline spacing should be >=132 mils

2. For components placed on the BOTTOM side

if component height is < 50 then testpoint to assembly BOTTOM outline spacing should be >=27 mils

if component height is > 50 and < 250 then testpoint to assembly BOTTOM outline spacing should be >=48 mils

if component height is > 250 then testpoint to assembly BOTTOM outline spacing should be >=112 mils

Thanks

Fadi

  • defun( DE_checkTestPoints ()
    let((result, results)
    axlClearSelSet()
    axlSetFindFilter(?enabled '("noall", "invisible", "pins", "vias"), ?onButtons '("noall", "pins", "vias"))
    axlAddSelectAll()
    foreach(tpObj, setof(obj, axlGetSelSet(), obj ->testPoint)
    result = DE_checkTestPoint(tpObj)
    when(result, results = cons(result, results))
    )
    results
    ))

    defun( DE_checkTestPoint (testPtObj)
    let((tpLoc, side, symLines, placebounds, result, proplemTestpoints)
    tpLoc = testPtObj ->xy
    side = cadr(parseString(testPtObj ->testPoint, "/")); "BOTTOM",
    foreach(sym, setof(s, axlDBGetDesign() ->symbols, if(side == "TOP", !s ->isMirrored, s ->isMirrored))
    symLines = setof(child, sym ->children, child ->objType == "path" && child ->layer == strcat("PACKAGE GEOMETRY/ASSEMBLY_", side))
    placebounds = setof(child, sym ->children, child ->layer == strcat("PACKAGE GEOMETRY/PLACE_BOUND_", side))
    result = cond(
    (exists(pb, placebounds, axlGeoPointInShape(tpLoc, pb))
    "under "
    )
    (exists(pb, placebounds, and(
    pbHeight = axlMKS2UU(pb ->prop ->PACKAGE_HEIGHT_MAX || "0.0")
    cond(
    (side == "TOP" && pbHeight < axlMKSConvert( 50, "mils"), exists(obj, symLines, DE_TPlineDist(tpLoc, obj) < axlMKSConvert( 47, "mils")))
    (side == "TOP" && pbHeight < axlMKSConvert(250, "mils"), exists(obj, symLines, DE_TPlineDist(tpLoc, obj) < axlMKSConvert( 68, "mils")))
    (side == "TOP" && pbHeight >= axlMKSConvert(250, "mils"), exists(obj, symLines, DE_TPlineDist(tpLoc, obj) < axlMKSConvert(132, "mils")))
    (side == "BOTTOM" && pbHeight < axlMKSConvert( 50, "mils"), exists(obj, symLines, DE_TPlineDist(tpLoc, obj) < axlMKSConvert( 27, "mils")))
    (side == "BOTTOM" && pbHeight < axlMKSConvert(250, "mils"), exists(obj, symLines, DE_TPlineDist(tpLoc, obj) < axlMKSConvert( 48, "mils")))
    (side == "BOTTOM" && pbHeight >= axlMKSConvert(250, "mils"), exists(obj, symLines, DE_TPlineDist(tpLoc, obj) < axlMKSConvert(112, "mils")))
    )
    ))
    "too close to "
    )
    )
    when(result, proplemTestpoints = cons(sprintf(nil, "%s side test point at %L is %s %s", side, tpLoc, result, sym ->refdes), proplemTestpoints))
    )
    proplemTestpoints
    ))

    defun( DE_TPlineDist (pt, obj), apply('min mapcar(lambda((segment), emiGetPoint2SegMinDist(segment, pt)), obj ->segments)))
  • Thank you Dave for the code. I appreciate it your help.
    I copied the code and saved it as "dft.il" file and I loaded it it using SKILL LOAD "dft.il" but what is the command that I should type to run the script?

    Thanks
    Fadi
  • This wasn't intended as final code - just a starting point for you. However, if you want to run it in it's current form, type "skill DE_checkTestPoints" on the command line after loading it.
  • Dave,
    is there any documentation for the function emiGetPoint2SegMinDist() ?
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