Centering Clines Within BGA

 Hi Dave,

I can't seem to get the code to work. Not sure why.

In any case, I found a code that might work but it also needs modification.

It's a code for replacing pins. As shown below I replaced all the functions and sprintf texts to get it to work. Unfortunately I'm stuck as how to make the  axlShoveItems function work in conjucntion with the grid. Maybe you can take a look at it if there's somthing that can be done to make it work.

So far here's what the code can do:

1. Allows you to select cline segments.

2. Lets you know how many segments was selected

3. Opens up a dialog window to select the dabase shape_symbols (I was thinking of creating a grid setting as a shape symbol.

4. Reports how segments we're moved.

;;#####################################################################################################
axlCmdRegister( "cntrLn" `Cntr_lns ?cmdType "general")
(defun Cntr_lns ()
  (let (mypopup cnt msg CLINES2center cntr_with grid_name mark)
    (setq mypopup
      (axlUIPopupDefine nil
                (list (list "Done" 'axlFinishEnterFun)
                  (list "Cancel" 'axlCancelEnterFun))
                )  
      );setq
     axlUIWPrint(nil "Pick or window the clines needed to be centered then RMB > Done or Cancel.")
    (axlUIPopupSet mypopup)
    (axlClearSelSet)
    (axlSetFindFilter ?enabled `("NOALL" "CLINESEGS") ?onButtons `("CLINESEGS"))
    (axlSelect ?groupMode t)
    (setq cnt axlGetSelSetCount())
    (sprintf msg "Do you want to Center the %d CLINE_SEGS?. Make sure that that you're using the correct GRID or else the clines will not be centered" cnt)
       (if (axlUIYesNo msg) then
      (setq CLINES2center (axlGetSelSet))
      axlClearSelSet()
      (setq cntr_with (axlUIDataBrowse 'SHAPE_SYMBOL '(EXAMINE_DATABASE DATABASE_FIXED RETRIEVE_OBJECT) "Shape_Symbol" t))
      (setq grid_name (car cntr_with))

     (setq ldbid (axlShoveItems CLINES2center))<-- here's the funtion. Not sure what to do from here on.

     (if (length ldbid) != cnt then
      (sprintf msg "WARNING: Centered only %d out of %d CLINES.\n\nCheck for FIXED property or add the correct grid setting to the database (current grid list) then retry" (length ldbid) cnt)
      axlUIConfirm(msg)
      else
      (sprintf msg "Info: Centered %d out of %d clines." (length ldbid) cnt)
      axlUIConfirm(msg)
      );
      );if
    (axlClearSelSet)
    (axlFinishEnterFun)
    );let
  );defun 

 Thanks,

Eddie

Hi Eddie,

This isn't trivial. It will require a reasonable programming effort. I could do this but it would take me several hours and I would need a reference design to ensure I was actually meeting your requirement.

You need to set your shove parameters. You need to be shoving using the gridded option.

The key is to set the grid up correctly. On a staggered grid this will be fun and probably not possible if the vias are not on a 45 degree grid.

Dave 

 Hi Dave,

I sent you a board file that I just created in Allegro Editor 16.6. I hope it helps.

It has few clines so as not complicate the board since the bga is a satagered pitch via.

Thanks again Dave.

Hi Eddie,

If you want to know whether my suggested method would be possible with this design, my answer is yes, probably. Substantial coding would be required. For a one-off exercise it may be quicker to "gloss" this by hand. However, I'm sure that the layout experts out there with familiarity with constraint regions and the glossing tools would recommend that you use the existing inbuilt Allegro tools.

Dave