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skill code for finding the pin which is not in the pitch

vbhuma

Hi,

I have bunch of pins in the layout and suppose to be in the pitch, I have written skill code for finding the pin which is not in the pitch. My code is not working and  I have observed that " if " function is problem in below code, I have seen that  few pins are selecting( geSelectFigs(pin) is used inside if  function)  in the layout  even if condition is not satisfied. 

Could anyone help me on finding the problem in below code. 

procedure(flatten( numberlist )
foreach( mapcan element numberlist
element
) ; foreach
) ; procedure

procedure(trMakeSublists( numberlist )
foreach( mapcar element numberlist
list( element )
) ; foreach
) ; procedure

procedure( findPinPitch()
let( (cv allPins count )

cv=geGetWindowCellView()
allPins=setof(x cv~>shapes x~>pin)
bBoxList=allPins~>bBox
inputlist=foreach( mapcar bBox bBoxList
xCoord( lowerLeft( bBox )))

orderlist=sortcar( trMakeSublists( inputlist ) 'lessp)
new_list=flatten( orderlist )
k=length(new_list)
pitch=0.456
i=1
m=k-2
count=0
for(j 0 m

a=(nth(i new_list)-nth(j new_list))


if( a != pitch then

pin=setof(sh cv~>shapes sh~>objType=="rect" && cadr(sh~>lpp)=="pin" && xCoord(car(sh~>bBox))==nth(i new_list))
geSelectFigs(pin)
printf("\n Isolated %L pin with net %s found at %L\n" car(pin~>lpp) car(pin~>net~>name) car(pin~>bBox))
count++


); end if
i=i+1

); end for
printf("\n %n isolated pin(s) selected in cell %s\n" count cv~>cellName)
) ;let
) ;procedure

Parents

  • Hi,

    I have had just a quick look at your code - one potential error is that you compare floating point numbers with '==':
    xCoord(car(sh~>bBox))==nth(i new_list)
    ...which might not do what you expect because floating point numbers are just approximations of their decimal equivalents. A safe way to compare floating point numbers is to turn them into strings:
    (sprintf nil "%4.2f" xCoord(car(sh~>bBox))) == (sprintf nil "%4.2f" nth(i new_list))

    On a different note - your way to get a sorted  list of the lower left x--coords of the pins is a little convoluted...how about that one:
    (sort
        (foreach mapcar x
            setof(x cv~>shapes x~>pin) (caar x~>bBox))
    'lessp)

    Max

Reply

  • Hi,

    I have had just a quick look at your code - one potential error is that you compare floating point numbers with '==':
    xCoord(car(sh~>bBox))==nth(i new_list)
    ...which might not do what you expect because floating point numbers are just approximations of their decimal equivalents. A safe way to compare floating point numbers is to turn them into strings:
    (sprintf nil "%4.2f" xCoord(car(sh~>bBox))) == (sprintf nil "%4.2f" nth(i new_list))

    On a different note - your way to get a sorted  list of the lower left x--coords of the pins is a little convoluted...how about that one:
    (sort
        (foreach mapcar x
            setof(x cv~>shapes x~>pin) (caar x~>bBox))
    'lessp)

    Max

Children

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