[myhdl-list] dff

[Amway I. <i....@ya...>]

Hello  Everybody
 
To day  tried to run dff model from myhdl documentation and it is giving some errors which are enclosed.  I wrote two files 1.dff.py  and 2. test_dff.py:
 
dff.py

from myhdl import *
def dff(q, d, clk):
@always(clk.posedge)
def logic():
q.next = d
return logic
 
test_dff.py
from random import randrange
def test_dff():

q, d, clk = [Signal(bool(0)) for i in range(3)]

dff_inst = dff(q, d, clk)
@always(delay(10))
def clkgen():
clk.next = not clk
@always(clk.negedge)
def stimulus():
d.next = randrange(2)
return dff_inst, clkgen, stimulus
def simulate(timesteps):
tb = traceSignals(test_dff)
sim = Simulation(tb)
sim.run(timesteps)
simulate(2000)
 
When i run 
$python test_dff.py gives 
traceSignal not defined
 
What is the reason?
 
 
 
 
 


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