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mirror of https://github.com/myhdl/myhdl.git synced 2025-01-24 21:52:56 +08:00
This commit is contained in:
jand 2005-12-10 23:12:01 +00:00
parent eee364fd65
commit 42f26ccded
2 changed files with 14 additions and 11 deletions

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@ -1,13 +1,10 @@
from __future__ import generators
from random import randrange
from myhdl import Signal, Simulation, StopSimulation
from myhdl import intbv, delay, posedge, negedge, now, always, instance
from myhdl import *
ACTIVE_LOW, INACTIVE_HIGH = 0, 1
def Inc(count, enable, clock, reset, n):
""" Incrementer with enable.
count -- output
@ -15,20 +12,24 @@ def Inc(count, enable, clock, reset, n):
clock -- clock input
reset -- asynchronous reset input
n -- counter max value
"""
while 1:
yield clock.posedge, reset.negedge
@always(clock.posedge, reset.negedge)
def incLogic():
if reset == ACTIVE_LOW:
count.next = 0
else:
if enable:
count.next = (count + 1) % n
return incLogic
def testbench():
count, enable, clock, reset = [Signal(intbv(0)) for i in range(4)]
INC_1 = Inc(count, enable, clock, reset, n=4)
inc_1 = Inc(count, enable, clock, reset, n=4)
HALF_PERIOD = delay(10)
@ -55,7 +56,7 @@ def testbench():
yield delay(1)
print " %s %s" % (enable, count)
return clockGen, stimulus, INC_1, monitor
return clockGen, stimulus, inc_1, monitor
tb = testbench()

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@ -1,6 +1,7 @@
from myhdl import Signal, Simulation, delay, always_comb
def Mux(z, a, b, sel):
""" Multiplexer.
z -- mux output
@ -8,14 +9,15 @@ def Mux(z, a, b, sel):
sel -- control input: select a if asserted, otherwise b
"""
@always_comb
def muxlogic():
def muxLogic():
if sel == 1:
z.next = a
else:
z.next = b
return muxlogic
return muxLogic
from random import randrange