1.3. Generating feedthrough from multiple instances

This example demonstrates how to generate feedthrough from multiple instances. If multiple instances belong to the same reference module it should reuser the feedthrough instead of creating independent feedthrough to pass through each instance.

This example creates new wire A and create feedthrough port and connection from inst_1_0 and inst_1_1 in sequence.

Before feedthrough

After feedthrough

import logging
import spydrnet as sdn
import spydrnet_physical as sdnphy
from spydrnet_physical.composers.html.composer import HTMLComposer
from spydrnet_physical.composers.svg.composer import SVGComposer

logger = logging.getLogger('spydrnet_logs')
sdn.enable_file_logging(LOG_LEVEL='INFO')

# logger.warning("NotImplemented")


netlist = sdnphy.load_netlist_by_name('basic_hierarchy')
top = netlist.top_instance.reference

cable = top.create_cable(name='A', wires=1)
top.create_port(name='A', direction=sdn.IN, pins=1)

cable_out = top.create_cable(name='Aout', wires=1)
top.create_port(name='Aout', direction=sdn.OUT, pins=1)
cable_out.assign_cable(cable)

composer = HTMLComposer()
composer.run(netlist, file_out="_basic_hierarchy_design.html")
composer = SVGComposer()
composer.run(netlist, file_out="_basic_hierarchy_design.svg")


inst1 = next(top.get_instances('inst_1_0'))
inst2 = next(top.get_instances('inst_1_1'))

inst_list = [(cable, [inst1, inst2])]

top.create_feedthrough_multiple(inst_list)
top.create_unconn_wires()

composer = HTMLComposer()
composer.run(netlist, file_out="_Feedthrough_basic_hierarchy_design.html")
composer = SVGComposer()
composer.expand(modules=["module1"])
composer.run(netlist, file_out="_Feedthrough_basic_hierarchy_design.svg",
             netlistsvg="netlistsvg-hierarchy")
sdn.compose(netlist, '_basic_hierarchy_after_multiple_feedthrough.v',
            skip_constraints=True)