30 lines
788 B
Python
30 lines
788 B
Python
from nmigen import *
|
|
from nmigen.cli import main
|
|
|
|
|
|
class ParMux(Elaboratable):
|
|
def __init__(self, width):
|
|
self.s = Signal(3)
|
|
self.a = Signal(width)
|
|
self.b = Signal(width)
|
|
self.c = Signal(width)
|
|
self.o = Signal(width)
|
|
|
|
def elaborate(self, platform):
|
|
m = Module()
|
|
with m.Switch(self.s):
|
|
with m.Case("--1"):
|
|
m.d.comb += self.o.eq(self.a)
|
|
with m.Case("-1-"):
|
|
m.d.comb += self.o.eq(self.b)
|
|
with m.Case("1--"):
|
|
m.d.comb += self.o.eq(self.c)
|
|
with m.Case():
|
|
m.d.comb += self.o.eq(0)
|
|
return m
|
|
|
|
|
|
if __name__ == "__main__":
|
|
pmux = ParMux(width=16)
|
|
main(pmux, ports=[pmux.s, pmux.a, pmux.b, pmux.c, pmux.o])
|