fix power straps

vlsi/example-vlsi

@@ -24,7 +24,7 @@ def example_tool_settings(x: hammer_vlsi.HammerTool) -> bool:
     x.append('''
 # TODO
 # Place custom TCL here
-set_db route_design_bottom_routing_layer 2
+set_db route_design_bottom_routing_layer 1
 set_db route_design_top_routing_layer 7
 ''')
     return True
@@ -32,6 +32,7 @@ set_db route_design_top_routing_layer 7
 def scale_final_gds(x: hammer_vlsi.HammerTool) -> bool:
     """
     Scale the final GDS by a factor of 4
+    hammer/src/hammer-vlsi/technology/asap7/__init__.py implements scale_gds_script
     """
     x.append('''
 # Write script out to a temporary file and execute it
@@ -53,16 +54,21 @@ class ExampleDriver(CLIDriver):
             # Default set of steps can be found in the CAD tool plugin's __init__.py
 
             # make_pre_insertion_hook will execute the custom hook before the specified step
-            hammer_vlsi.HammerTool.make_pre_insertion_hook("route_design", example_add_fillers),  # SYNTAX: make_pre_insertion_hook("EXISTING_STEP", INSERTED_HOOK)
+            # SYNTAX: make_pre_insertion_hook("EXISTING_STEP", INSERTED_HOOK)
+            # hammer_vlsi.HammerTool.make_pre_insertion_hook("route_design", example_add_fillers),
+
             # make_post_insertion_hook will execute the custom hook after the specified step
             hammer_vlsi.HammerTool.make_post_insertion_hook("init_design", example_tool_settings),
+
             # make_replacement_hook will replace the specified step with a custom hook
-            hammer_vlsi.HammerTool.make_replacement_hook("place_tap_cells", example_place_tap_cells),
+            # hammer_vlsi.HammerTool.make_replacement_hook("place_tap_cells", example_place_tap_cells),
+
             # make_removal_hook will remove the specified step from the flow
             hammer_vlsi.HammerTool.make_removal_hook("place_bumps"),
+
             # The target step in any of the above calls may be a default step or another one of your custom hooks
 
-            # This is an example of a technology-supplied hook (look in hammer/src/hammer-vlsi/technology/asap7/__init__.py)
+            # This is an example of a technology-supplied hook
             hammer_vlsi.HammerTool.make_post_insertion_hook("write_design", scale_final_gds)
         ]
         return extra_hooks