# SPDX-License-Identifier: Apache-2.0
# Copyright 2019 Blue Cheetah Analog Design Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from __future__ import annotations
from typing import Any, Dict, Tuple
from pybag.core import BBox
from bag.util.immutable import Param
from bag.layout.template import TemplateBase, TemplateDB
from ..data import draw_layout_in_template
from .tech import FillTech
[docs]class DeviceFill(TemplateBase):
"""A template that fills an area with active devices.
"""
def __init__(self, temp_db: TemplateDB, params: Param, **kwargs: Any) -> None:
TemplateBase.__init__(self, temp_db, params, **kwargs)
@classmethod
[docs] def get_min_fill_dim(cls, tech_info, mos_type, threshold):
tech_cls = tech_info.tech_params['layout']['mos_tech_class']
return tech_cls.get_min_fill_dim(mos_type, threshold)
@classmethod
[docs] def get_params_info(cls) -> Dict[str, str]:
return dict(
width='The width of the fill area, in resolution units.',
height='The height of the fill area, in resolution units.',
edges='The left/bottom/right/top edge parameters.',
mos_type='transistor type.',
threshold='transistor threshold.',
)
@classmethod
[docs] def get_default_param_values(cls) -> Dict[str, Any]:
return dict(
mos_type='',
threshold='',
edges=(Param(), Param(), Param(), Param()),
)
[docs] def draw_layout(self):
w: int = self.params['width']
h: int = self.params['height']
edges: Tuple[Param, Param, Param, Param] = self.params['edges']
mos_type: str = self.params['mos_type']
threshold: str = self.params['threshold']
# draw fill
grid = self.grid
tech_cls: FillTech = grid.tech_info.get_device_tech('fill')
# set size
box = BBox(0, 0, w, h)
self.prim_top_layer = grid.bot_layer
self.array_box = self.prim_bound_box = box
mos_type = mos_type or tech_cls.mos_type_default
threshold = threshold or tech_cls.threshold_default
info = tech_cls.get_fill_info(mos_type, threshold, w, h, edges[0], edges[1],
edges[2], edges[3])
draw_layout_in_template(self, info)