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quick_start_BAG.py
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#!/usr/bin/python
########################################################################################################################
#
# Copyright (c) 2014, Regents of the University of California
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
# following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following
# disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
# following disclaimer in the documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
# INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
########################################################################################################################
"""Quick start script for bag flow - nand gate layout generator"""
__author__ = "Jaeduk Han"
__maintainer__ = "Jaeduk Han"
__email__ = "[email protected]"
__status__ = "Prototype"
if __name__ == '__main__':
import laygo
import numpy as np
#initialize
laygen = laygo.GridLayoutGenerator(config_file="laygo_config.yaml")
#template and grid load
utemplib = laygen.tech+'_microtemplates_dense' #device template library name
laygen.load_template(filename=utemplib+'_templates.yaml', libname=utemplib)
laygen.load_grid(filename=utemplib+'_grids.yaml', libname=utemplib)
laygen.templates.sel_library(utemplib)
laygen.grids.sel_library(utemplib)
# library & cell creation
laygen.add_library('laygo_working')
laygen.add_cell('nand_test')
# grid variables
pg = 'placement_basic'
rg12 = 'route_M1_M2_cmos'
rg23 = 'route_M2_M3_cmos'
#placements
nr = ['nmos4_fast_boundary', 'nmos4_fast_center_nf2', 'nmos4_fast_boundary',
'nmos4_fast_boundary', 'nmos4_fast_center_nf2', 'nmos4_fast_boundary']
pr = ['pmos4_fast_boundary', 'pmos4_fast_center_nf2', 'pmos4_fast_boundary',
'pmos4_fast_boundary', 'pmos4_fast_center_nf2', 'pmos4_fast_boundary']
pd = ['top']+['right']*5
nrow = laygen.relplace(templatename=nr, gridname=pg)
prow = laygen.relplace(templatename=pr, gridname=pg, refobj=nrow[0], direction=pd, transform='MX')
#routes
# a
laygen.route(xy0=[0, 0], xy1=[0, 0], gridname0=rg12, refobj0=prow[4].pins['G0'], refobj1=nrow[4].pins['G0'], via0=[0, 0])
laygen.route(xy0=[-2, 0], xy1=[0, 0], gridname0=rg12, refobj0=prow[4].pins['G0'], refobj1=prow[4].pins['G0'])
ra0 = laygen.route(xy0=[0, 0], xy1=[0, 2], gridname0=rg23, refobj0=prow[4].pins['G0'], refobj1=prow[4].pins['G0'],
via0=[0, 0], endstyle0="extend", endstyle1="extend")
# b
laygen.route(xy0=[0, 0], xy1=[0, 0], gridname0=rg12, refobj0=nrow[1].pins['G0'], refobj1=prow[1].pins['G0'], via0=[0, 0])
laygen.route(xy0=[0, 0], xy1=[2, 0], gridname0=rg12, refobj0=nrow[1].pins['G0'], refobj1=nrow[1].pins['G0'])
rb0 = laygen.route(xy0=[0, 0], xy1=[0, 2], gridname0=rg23, refobj0=nrow[1].pins['G0'], refobj1=nrow[1].pins['G0'],
via0=[0, 0], endstyle0="extend", endstyle1="extend")
# internal
laygen.route(xy0=[0, 1], xy1=[0, 1], gridname0=rg12, refobj0=nrow[1].pins['D0'], refobj1=nrow[4].pins['S1'],
via0=[0, 0], via1=[[-2, 0], [0, 0]])
# output
laygen.route(xy0=[0, 1], xy1=[1, 1], gridname0=rg12, refobj0=prow[1].pins['D0'], refobj1=prow[4].pins['D0'],
via0=[0, 0], via1=[-1, 0])
laygen.route(xy0=[-1, 0], xy1=[1, 0], gridname0=rg12, refobj0=nrow[4].pins['D0'], refobj1=nrow[4].pins['D0'], via0=[1, 0])
ro0 = laygen.route(xy0=[1, 0], xy1=[1, 1], gridname0=rg23, refobj0=nrow[4].pins['D0'], via0=[0, 0],
refobj1=prow[4].pins['D0'], via1=[0, 0])
# power and ground route - vertical
for d in [nrow[1], prow[1], prow[4]]:
for s in ['S0', 'S1']:
laygen.route(None, gridname0=rg12, refobj0=d.pins[s], refobj1=d, via1=[0, 0], direction='y')
# power and ground route - horizontal
xy = laygen.get_template_xy(name=nrow[-1].cellname, gridname=rg12) * np.array([1, 0])
rvdd=laygen.route(None, xy0=[0, 0], xy1=xy, gridname0=rg12, refobj0=prow[0], refobj1=prow[-1])
rvss=laygen.route(None, xy0=[0, 0], xy1=xy, gridname0=rg12, refobj0=nrow[0], refobj1=nrow[-1])
#pins
for pn, rp in zip(['A', 'B', 'O'], [ra0, rb0, ro0]):
laygen.pin(name=pn, layer=laygen.layers['pin'][3], refobj=rp, gridname=rg23)
for pn, rp in zip(['VDD', 'VSS'], [rvdd, rvss]):
laygen.pin(name=pn, layer=laygen.layers['pin'][2], refobj=rp, gridname=rg12)
laygen.display()
# export
import bag
prj = bag.BagProject()
laygen.export_BAG(prj)