##usage command: calibredrv ./flatten_gds_partial.tcl topcell_name 

## this command will flatten the given gds, except the cells define in GOLDEN_CELL 

## topcell.swap.gds should be found in the same folder, 

#or change the layout_IN to gds file. Output flatten GDS top cell cel name will be topCellName_flatten

#created by twoz

##user define begin#######

##first argument in the command arguments.

set TOPCELL [lindex $argv 0]

#define input GDS. 

set LAYOUT_IN ${TOPCELL}.gds 

#define output GDS after flatten. 

set LAYOUT_OUT ${TOPCELL}.flatten.gds

#define golden cell list that not be flattened. 

set GOLDEN_CEL {Gold_cell1 Gold_cell2}

##end of user define#############

set L1 [layout create $LAYOUT_IN -dt_expand]

set TOPCELL1 [$L1 topcell]

set cellList [$L1 cells]

#flatten each cell, except golden cell.

foreach cell $cellList {if { [lsearch $GOLDEN_CEL $cell0] != -1 } 

  {puts "skip golden cell.\n"} 

else 

  {$L1 expand cell $cell}

#end if

}

#end foreach 

# change the top cell name.

 $L1 cellname $TOPCELL1 ${TOPCELL1}_flatten 

# write the flatten GDS

$L1 gdsout $LAYOUT_OUT ${TOPCELL1}_flatten