def Serial2Parallel(sdata, start, dout, sclk):
M = len(dout)
assert M > 2
buf = create_signals(M)
en = create_signals(M - 1)
shift_msb = ff.dff_set(en[M - 2], False, start, sclk)
buf_msb = ff.dffe(buf[M - 1], sdata, start, sclk)
shifts = [ff.dff_reset(en[M - 3 - i], en[M - 2 - i], sclk, start)
for i in range(M - 2)]
bufs = [ff.dffe_rst(buf[M - 2 - i], sdata, en[M - 2 - i], sclk, start)
for i in range(M - 1)]
if dout.min < 0:
@always(sclk.posedge)
def logic():
if start:
t = intbv(0, _nrbits=M)
for i in range(M):
t[i] = buf[i]
dout.next = t.signed()
else:
@always(sclk.posedge)
def logic():
if start:
t = intbv(0, _nrbits=M)
for i in range(M):
t[i] = buf[i]
dout.next = t
return shift_msb, shifts, buf_msb, bufs, logic
def bench_async():
q, d = create_signals(2, 8)
p_rst = create_signals(1)
clock, reset = create_clock_reset(rst_active=False, rst_async=True)
dffa_inst = ff.dff_reset(q, d, clock, reset)
clock_gen = clocker(clock)
@always(clock.negedge)
def stimulus():
if reset and p_rst:
assert d == q
p_rst.next = reset
d.next = randrange(2)
@instance
def reset_gen():
yield delay(5)
reset.next = 1
while True:
yield delay(randrange(500, 1000))
reset.next = 0
yield delay(randrange(80, 140))
reset.next = 1
return dffa_inst, clock_gen, stimulus, reset_gen
def Serial2Parallel(sdata, start, dout, sclk):
M = len(dout)
assert M > 2
buf = create_signals(M)
en = create_signals(M - 1)
shift_msb = ff.dff_set(en[M - 2], False, start, sclk)
buf_msb = ff.dffe(buf[M - 1], sdata, start, sclk)
shifts = [
ff.dff_reset(en[M - 3 - i], en[M - 2 - i], sclk, start)
for i in range(M - 2)
]
bufs = [
ff.dffe_rst(buf[M - 2 - i], sdata, en[M - 2 - i], sclk, start)
for i in range(M - 1)
]
if dout.min < 0:
@always(sclk.posedge)
def logic():
if start:
t = intbv(0, _nrbits=M)
for i in range(M):
t[i] = buf[i]
dout.next = t.signed()
else:
@always(sclk.posedge)
def logic():
if start:
t = intbv(0, _nrbits=M)
for i in range(M):
t[i] = buf[i]
dout.next = t
return shift_msb, shifts, buf_msb, bufs, logic
def bench_sync():
q, d = create_signals(2, 8)
p_rst = create_signals(1)
clock, reset = create_clock_reset()
dffa_inst = ff.dff_reset(q, d, clock, reset)
clock_gen = clocker(clock)
@always(clock.negedge)
def stimulus():
if not p_rst:
assert d == q
# print("CLK DOWN | {} | {} | {} | {} | {} ".format(reset, p_rst, d,
# q, clock))
d.next = randrange(2)
@always(clock.posedge)
def reset_buf_dly():
# print("CLK UP | {} | {} | {} | {} | {} ".format(reset, p_rst, d,
# q, clock))
p_rst.next = reset
@instance
def reset_gen():
yield delay(5)
reset.next = 0
while True:
yield delay(randrange(500, 1000))
reset.next = 1
yield delay(randrange(80, 140))
reset.next = 0
return dffa_inst, clock_gen, stimulus, reset_gen, reset_buf_dly
def bench_sync():
q, d = create_signals(2, 8)
p_rst = create_signals(1)
clock, reset = create_clock_reset()
dffa_inst = ff.dff_reset(q, d, clock, reset)
clock_gen = clocker(clock)
@always(clock.negedge)
def stimulus():
if not p_rst:
assert d == q
# print("CLK DOWN | {} | {} | {} | {} | {} ".format(reset, p_rst, d,
# q, clock))
d.next = randrange(2)
@always(clock.posedge)
def reset_buf_dly():
# print("CLK UP | {} | {} | {} | {} | {} ".format(reset, p_rst, d,
# q, clock))
p_rst.next = reset
@instance
def reset_gen():
yield delay(5)
reset.next = 0
while True:
yield delay(randrange(500, 1000))
reset.next = 1
yield delay(randrange(80, 140))
reset.next = 0
return dffa_inst, clock_gen, stimulus, reset_gen, reset_buf_dly
