mirror of
https://github.com/myhdl/myhdl.git
synced 2025-01-24 21:52:56 +08:00
34 lines
739 B
Python
34 lines
739 B
Python
|
from __future__ import generators
|
||
|
|
from myhdl import Signal, Simulation, delay
|
||
|
|
|
||
|
|
def mux(z, a, b, sel):
|
||
|
|
""" Multiplexer.
|
||
|
|
|
||
|
|
z -- mux output
|
||
|
|
a, b -- data inputs
|
||
|
|
sel -- control input: select a if asserted, otherwise b
|
||
|
|
"""
|
||
|
|
while 1:
|
||
|
|
yield a, b, sel
|
||
|
|
if sel == 1:
|
||
|
|
z.next = a
|
||
|
|
else:
|
||
|
|
z.next = b
|
||
|
|
|
||
|
|
from random import randrange
|
||
|
|
|
||
|
|
(z, a, b, sel) = [Signal(0) for i in range(4)]
|
||
|
|
|
||
|
|
MUX_1 = mux(z, a, b, sel)
|
||
|
|
|
||
|
|
def test():
|
||
|
|
print "z a b sel"
|
||
|
|
for i in range(8):
|
||
|
|
a.next, b.next, sel.next = randrange(8), randrange(8), randrange(2)
|
||
|
|
yield delay(10)
|
||
|
|
print "%s %s %s %s" % (z, a, b, sel)
|
||
|
|
|
||
|
|
if __name__ == "__main__":
|
||
|
|
Simulation(MUX_1, test()).run()
|
||
|
|
|