Hello everyone I want to create a blockage at some empty area in my design is it possible to create the blockage and what is command. Can anyone help with this

There are two variables you can use: `FP_OBSTRUCTIONS`: https://openlane2.readthedocs.io/en/latest/reference/step_config_vars.html#var-openroad-floorplan-fp-obstructions `ROUTING_OBSTRUCTIONS`: https://openlane2.readthedocs.io/en/latest/reference/step_config_vars.html#var-odb-addroutingobstructions-routing-obstructions Examples would be:

{
  "FP_OBSTRUCTIONS": [
    [
      0,
      0,
      100,
      100
    ]
  ],
  "ROUTING_OBSTRUCTIONS": [
    "met1 150 150 300 300"
  ]
}

This would create a placement blockage for the area (0, 0, 100, 100) and prevent routing on

met1

for the area (150, 150, 300, 300). You can set them to be the same of course, as well as add the obstruction on more than one routing layer.

What about OpenLane 1

GRT_OBS

instead of

ROUTING_OBSTRUCTIONS

, but placement obstructions are not supported.

No need to use FO_OBSTRUCTIONS

then yeah just GRT_OBs

Ok thanks for the help