#####################################################
# Power planning   (Erik Brunvand, 2008)            #
#####################################################
puts "-------------Power Planning----------------"
puts "-------Making power rings------------------"
#
# Make power and ground rings 
#    $pwidth microns wide with $pspace spacing between them
#    and centered in the channel 
addRing -spacing_bottom $pspace -width_left $pwidth -width_bottom $pwidth \
        -width_top $pwidth -spacing_top $pspace -layer_bottom metal1 -center 1 \
        -stacked_via_top_layer metal3 -width_right $pwidth -around core \
        -jog_distance $pspace -offset_bottom $pspace -layer_top metal1 \
        -threshold $pspace -offset_left $pspace -spacing_right $pspace \
        -spacing_left $pspace -offset_right $pspace -offset_top $pspace \
        -layer_right metal2 -nets {gnd! vdd! } -stacked_via_bottom_layer metal1 \
        -layer_left metal2 
#
puts "------making power stripes-----------------"
#
# Make Power Stripes. This step is optional. If you keep it in remember to 
# check the stripe spacing (set-to-set-distance = $sspace) 
# and stripe offset (xleft-offset = $soffset)) 
addStripe -block_ring_top_layer_limit metal3 -max_same_layer_jog_length 3.0 \
          -snap_wire_center_to_grid Grid -padcore_ring_bottom_layer_limit metal1 \
          -set_to_set_distance $sspace -stacked_via_top_layer metal3 \
          -padcore_ring_top_layer_limit metal3 -spacing $pspace -xleft_offset $soffset \
          -merge_stripes_value 1.5 -layer metal2 -block_ring_bottom_layer_limit metal1 \
          -width $swidth -nets {gnd! vdd! } -stacked_via_bottom_layer metal1
#
# Use the special-router to route the vdd! and gnd! nets
sroute -jogControl { preferWithChanges differentLayer }

# Save the design so far
saveDesign ${BASENAME}_pplan.enc
puts "-------------Power Planning done---------"