metal (or any dummy fill layer) skill code that can run at the block or chip level and automatically fill dummy metal in vacant spaces.

Hi Yogesh,

I'm not exactly sure as I didn't exactly understood what your code is doing.

As Andrew said, it is using functions that look like Cadence ones.

If they are custom, this is a really bad habit as it can be really confusing for others (especially on the forum)...

Aren't you trying to achieve something similar to what's done in:

Cadence Community SKILL Forum - How to do a dbLayerAndNot from top-level through the whole hierarchy?

If you want to fill the holes instead of generating the whole layer (regarding the code I made in the mentioned article):

You can probably browse the ABE islands from the resulting layers and create rectangles inside each island.

Also maybe rodFillBBoxWithRects can be useful in your case.

Hi Yogesh,

I'm not exactly sure as I didn't exactly understood what your code is doing.

As Andrew said, it is using functions that look like Cadence ones.

If they are custom, this is a really bad habit as it can be really confusing for others (especially on the forum)...

Aren't you trying to achieve something similar to what's done in:

Cadence Community SKILL Forum - How to do a dbLayerAndNot from top-level through the whole hierarchy?

If you want to fill the holes instead of generating the whole layer (regarding the code I made in the mentioned article):

You can probably browse the ABE islands from the resulting layers and create rectangles inside each island.

Also maybe rodFillBBoxWithRects can be useful in your case.

Greetings Aurel & Andrew

It means a lot when you take time from your busy schedule to reply to such answers; 

I have succeeded in this quest with your help.. I wrote the following code  ...  The code is functioning as expected.  

procedure(and_not_fill_safe(@key (cv (geGetEditCellView)) existing_lpp filling_lpp (keepOut 0.1))
let((tf boundary_points existing_abe shrunk_abe boundary_abe filling_abe)

unless(cv
 warn("️ No active layout window. Open a layout first!\n")
then(return(nil))
)

tf = techGetTechFile(cv)

unless(and(existing_lpp filling_lpp)
 warn("️ Must provide both existing_lpp and filling_lpp as (layer purpose)\n")
then(return(nil))
)

when(not(techGetLP(tf existing_lpp))
 warn("️ Existing layer %L not found in tech file.\n" existing_lpp)
)
when(not(techGetLP(tf filling_lpp))
 warn("️ Fill layer %L not found in tech file.\n" filling_lpp)
)

abeInit(cv)
unwindProtect(
progn(
;; --- Get boundary (prBoundary or bbox) ---
boundary_points = nil
when(cv~>prBoundary
boundary_points = car(cv~>prBoundary)~>points
)
unless(boundary_points
let((bb ll ur)
bb = cv~>bBox
ll = car(bb)
ur = cadr(bb)
boundary_points = list(
list(car(ll) cadr(ll))
list(car(ur) cadr(ll))
list(car(ur) cadr(ur))
list(car(ll) cadr(ur))
)
)
)

;; --- Create ABE layers ---
existing_abe = abeLayerFromCellView(car(existing_lpp) ?purpose cadr(existing_lpp))
boundary_abe = abeNewLayer()
filling_abe = abeNewLayer()
shrunk_abe = abeNewLayer()

abeLayerOrPtArray(boundary_points boundary_abe)

;;  Replace abeLayerShrink with abeLayerSize (portable)
abeLayerSize(existing_abe shrunk_abe (- keepOut))

;; Subtract shrunk metal area from boundary
abeLayerAndNot(boundary_abe shrunk_abe filling_abe)
abeLayerToCellView(filling_abe car(filling_lpp) ?purpose cadr(filling_lpp))

printf(" Safe dummy fill complete on %L avoiding %L (keepOut=%.3f)\n"
filling_lpp existing_lpp keepOut)
)
abeDone()
)
)
)

Once again thanks for warm gesture , We are here for each other !

Have a pleasant day!

Cheers & regards,

Yogesh Jaiswal 

Yogesh,

A small point - in your latest code, the checks at the beginning won't work correctly because they are trying to call return(). In order to use return(), you have to be within prog() - they won't work within a let(). You'd get:

*Error* return: return can only be used within a prog

Andrew