def test_spi_decode(self):
self.test_name = 'SPI message'
self.trial_count = 20
for i in xrange(self.trial_count):
self.update_progress(i+1)
cpol = random.choice((0, 1))
cpha = random.choice((0, 1))
lsb_first = random.choice((True, False))
word_size = random.randint(8, 32)
clock_freq = random.uniform(1.0e3, 1.0e7)
msg = []
for _ in xrange(random.randint(4, 20)):
msg.append(random.randint(0, 2**word_size-1))
use_edges = random.choice((True, False))
# msg = [3, 4, 5, 240]
# word_size = 8
# clock_freq = 30.0
# lsb_first = True
# cpol = 0
# cpha = 1
# use_edges = False
clk, mosi, cs = spi.spi_synth(msg, word_size, clock_freq, cpol, cpha, lsb_first, 4.0 / clock_freq, 0.0)
if use_edges:
records_it = spi.spi_decode(clk, mosi, cs, cpol=cpol, cpha=cpha, lsb_first=lsb_first, stream_type=streaming.StreamType.Edges)
else: # samples
#sr = 1.0e-2
sample_period = 1.0 / (20.0 * clock_freq)
#sample_period = 10.0e-2
clk_s = sigp.edges_to_sample_stream(clk, sample_period)
mosi_s = sigp.noisify(sigp.edges_to_sample_stream(mosi, sample_period))
cs_s = sigp.noisify(sigp.edges_to_sample_stream(cs, sample_period))
records_it = spi.spi_decode(clk_s, mosi_s, cs_s, cpol=cpol, cpha=cpha, lsb_first=lsb_first)
records = list(records_it)
#print('\nDecoded:', [str(r) for r in records])
#print(records[-1].start_time, records[-1].end_time)
msg_ix = 0
match = True
frame_cnt = 0
for r in records:
if r.kind == 'SPI frame':
frame_cnt += 1
#print('Data:', r.data, msg[msg_ix])
if r.data != msg[msg_ix]:
match = False
break
msg_ix += 1
self.assertTrue(match, msg='Message not decoded successfully')
self.assertEqual(frame_cnt, len(msg), 'Missing or extra decoded messages')
def test_i2c_decode(self):
self.test_name = 'I2C transfer'
self.trial_count = 20
for i in xrange(self.trial_count):
self.update_progress(i+1)
clock_freq = 100.0e3
transfers = []
transfers.append(i2c.I2CTransfer(i2c.I2C.Write, 0x23, [1,2,3, 4]))
transfers.append(i2c.I2CTransfer(i2c.I2C.Write, 0x183, [5, 6, 240]))
transfers = []
for _ in xrange(random.randint(1, 6)):
addr = random.randint(1, 2**10-1)
data = []
for __ in xrange(random.randint(1, 10)):
data.append(random.randint(0, 255))
r_wn = random.choice((i2c.I2C.Write, i2c.I2C.Read))
# reads with 10-bit addressing are special
if r_wn == i2c.I2C.Read and addr > 0x77:
transfers.append(i2c.I2CTransfer(i2c.I2C.Write, addr, data))
transfers.append(i2c.I2CTransfer(r_wn, addr, data))
else:
transfers.append(i2c.I2CTransfer(r_wn, addr, data))
use_edges = random.choice((True, False))
scl, sda = i2c.i2c_synth(transfers, clock_freq, idle_start=3.0e-5, idle_end=3.0e-5)
if use_edges:
records_it = i2c.i2c_decode(scl, sda, stream_type=streaming.StreamType.Edges)
else:
sample_period = 1.0 / (20.0 * clock_freq)
scl_s = sigp.edges_to_sample_stream(scl, sample_period)
sda_s = sigp.edges_to_sample_stream(sda, sample_period)
records_it = i2c.i2c_decode(scl_s, sda_s, stream_type=streaming.StreamType.Samples)
records = list(records_it)
d_txfers = list(i2c.reconstruct_i2c_transfers(iter(records)))
# validate the decoded transfers
match = True
for i, t in enumerate(d_txfers):
if t != transfers[i]:
print('\nMismatch:')
print(' ', t)
print(' ', transfers[i])
match = False
break
self.assertTrue(match, msg='Transfers not decoded successfully')
self.assertEqual(len(d_txfers), len(transfers), 'Missing or extra decoded transfers')
def test_ps2_decode(self):
self.test_name = 'PS/2 message'
self.trial_count = 20
for i in xrange(self.trial_count):
self.update_progress(i + 1)
clock_freq = random.uniform(10.0e3, 13.0e3)
frames = []
for _ in xrange(random.randint(4, 20)):
frames.append(ps2.PS2Frame(random.randint(0, 2**8-1), \
random.choice((ps2.PS2Dir.DeviceToHost, ps2.PS2Dir.HostToDevice))) \
)
use_edges = random.choice((True, False))
clk, data = ps2.ps2_synth(frames, clock_freq, 4.0 / clock_freq,
5.0 / clock_freq)
if use_edges:
records_it = ps2.ps2_decode(
clk, data, stream_type=streaming.StreamType.Edges)
else: # samples
#sr = 1.0e-2
sample_period = 1.0 / (20.0 * clock_freq)
#sample_period = 10.0e-2
clk_s = sigp.edges_to_sample_stream(clk, sample_period)
data_s = sigp.noisify(
sigp.edges_to_sample_stream(data, sample_period))
records_it = ps2.ps2_decode(clk_s, data_s)
records = list(records_it)
#print('\nDecoded:', [str(r) for r in records])
#print(records[-1].start_time, records[-1].end_time)
msg_ix = 0
match = True
frame_cnt = 0
for r in records:
if r.kind == 'PS/2 frame':
frame_cnt += 1
#print('Data:', r.data, msg[msg_ix])
if r.data != frames[msg_ix]:
match = False
break
msg_ix += 1
self.assertTrue(match, msg='Message not decoded successfully')
self.assertEqual(frame_cnt, len(frames),
'Missing or extra decoded messages')
def test_ps2_decode(self):
self.test_name = 'PS/2 message'
self.trial_count = 20
for i in xrange(self.trial_count):
self.update_progress(i+1)
clock_freq = random.uniform(10.0e3, 13.0e3)
frames = []
for _ in xrange(random.randint(4, 20)):
frames.append(ps2.PS2Frame(random.randint(0, 2**8-1), \
random.choice((ps2.PS2Dir.DeviceToHost, ps2.PS2Dir.HostToDevice))) \
)
use_edges = random.choice((True, False))
clk, data = ps2.ps2_synth(frames, clock_freq, 4.0 / clock_freq, 5.0 / clock_freq)
if use_edges:
records_it = ps2.ps2_decode(clk, data, stream_type=streaming.StreamType.Edges)
else: # samples
#sr = 1.0e-2
sample_period = 1.0 / (20.0 * clock_freq)
#sample_period = 10.0e-2
clk_s = sigp.edges_to_sample_stream(clk, sample_period)
data_s = sigp.noisify(sigp.edges_to_sample_stream(data, sample_period))
records_it = ps2.ps2_decode(clk_s, data_s)
records = list(records_it)
#print('\nDecoded:', [str(r) for r in records])
#print(records[-1].start_time, records[-1].end_time)
msg_ix = 0
match = True
frame_cnt = 0
for r in records:
if r.kind == 'PS/2 frame':
frame_cnt += 1
#print('Data:', r.data, msg[msg_ix])
if r.data != frames[msg_ix]:
match = False
break
msg_ix += 1
self.assertTrue(match, msg='Message not decoded successfully')
self.assertEqual(frame_cnt, len(frames), 'Missing or extra decoded messages')
def test_find_logic_levels(self):
# test with clean samples
# with noise
# with bandwidth limited (slow and fast)
# with noise and bandwidth limit
# with first edge before 200th sample, just before 200th, just after 200th, after 200th
sample_rate = 1000.0
sample_period = 1.0 / sample_rate
rise_time = sigp.min_rise_time(sample_rate) * 50.0
edge_vectors = {
'flat_line': (((0.0,0), (3.0,0)), False),
'rising_edge_100': (((0.0,0), (0.10,1), (3.0,1)), False),
'rising_edge_190': (((0.0,0), (0.19,1), (3.0,1)), True),
'rising_edge_200': (((0.0,0), (0.2,1), (3.0,1)), True),
'rising_edge_400': (((0.0,0), (0.40,1), (3.0,1)), True),
'pulse_100': (((0.0,0), (0.10,1), (0.5,0), (3.0,0)), True),
'multi_pulse': (((0.0,0), (0.7, 1), (0.8, 0), (0.9, 1), (1.0, 0), \
(1.1,1), (1.2,0), (1.3,1), (1.4,0), \
(1.5,1), (1.6,0), (3.0,1)), True),
}
no_noise_vectors = ('rising_edge_190', 'rising_edge_200')
sample_vectors = {}
for name, vector in edge_vectors.iteritems():
samples = list(
sigp.edges_to_sample_stream(iter(vector[0]), sample_period))
sample_vectors[name] = (samples, vector[1])
base_names = sample_vectors.keys()
for name in base_names:
if name in no_noise_vectors:
continue
noisy = list(
sigp.noisify(iter(sample_vectors[name][0]), snr_db=20.0))
sample_vectors['noisy_' + name] = (noisy, sample_vectors[name][1])
for name in base_names:
bwlim = list(
sigp.filter_waveform(iter(sample_vectors[name][0]),
sample_rate, rise_time))
sample_vectors['bwlim_' + name] = (bwlim, sample_vectors[name][1])
for name in base_names:
if name in no_noise_vectors:
continue
bwlim_noisy = list(sigp.noisify(sigp.filter_waveform(iter(sample_vectors[name][0]), \
sample_rate, rise_time), snr_db=20.0))
sample_vectors['bwlim_noisy_' + name] = (bwlim_noisy,
sample_vectors[name][1])
#sample_vectors.pop('rising_edge_400', None)
for name, vector in sample_vectors.iteritems():
samples = vector[0]
expect_success = vector[1]
logic_levels = decode.find_logic_levels(samples)
if not expect_success:
continue # We expected find_logic_levels() to fail
if logic_levels is None:
#print('### Fail:', name)
self.fail('No logic levels found')
#print('####', name, logic_levels)
self.assertRelativelyEqual(logic_levels[0],
0.0,
epsilon=0.16,
msg='Bad logic 0: {}'.format(
logic_levels[0]))
self.assertRelativelyEqual(logic_levels[1],
1.0,
epsilon=0.1,
msg='Bad logic 1: {}'.format(
logic_levels[1]))
def test_find_logic_levels(self):
# test with clean samples
# with noise
# with bandwidth limited (slow and fast)
# with noise and bandwidth limit
# with first edge before 200th sample, just before 200th, just after 200th, after 200th
sample_rate = 1000.0
sample_period = 1.0 / sample_rate
rise_time = sigp.min_rise_time(sample_rate) * 50.0
edge_vectors = {
'flat_line': (((0.0,0), (3.0,0)), False),
'rising_edge_100': (((0.0,0), (0.10,1), (3.0,1)), False),
'rising_edge_190': (((0.0,0), (0.19,1), (3.0,1)), True),
'rising_edge_200': (((0.0,0), (0.2,1), (3.0,1)), True),
'rising_edge_400': (((0.0,0), (0.40,1), (3.0,1)), True),
'pulse_100': (((0.0,0), (0.10,1), (0.5,0), (3.0,0)), True),
'multi_pulse': (((0.0,0), (0.7, 1), (0.8, 0), (0.9, 1), (1.0, 0), \
(1.1,1), (1.2,0), (1.3,1), (1.4,0), \
(1.5,1), (1.6,0), (3.0,1)), True),
}
no_noise_vectors = ('rising_edge_190', 'rising_edge_200')
sample_vectors = {}
for name, vector in edge_vectors.iteritems():
samples = list(sigp.edges_to_sample_stream(iter(vector[0]), sample_period))
sample_vectors[name] = (samples, vector[1])
base_names = sample_vectors.keys()
for name in base_names:
if name in no_noise_vectors:
continue
noisy = list(sigp.noisify(iter(sample_vectors[name][0]), snr_db=20.0))
sample_vectors['noisy_' + name] = (noisy, sample_vectors[name][1])
for name in base_names:
bwlim = list(sigp.filter_waveform(iter(sample_vectors[name][0]), sample_rate, rise_time))
sample_vectors['bwlim_' + name] = (bwlim, sample_vectors[name][1])
for name in base_names:
if name in no_noise_vectors:
continue
bwlim_noisy = list(sigp.noisify(sigp.filter_waveform(iter(sample_vectors[name][0]), \
sample_rate, rise_time), snr_db=20.0))
sample_vectors['bwlim_noisy_' + name] = (bwlim_noisy, sample_vectors[name][1])
#sample_vectors.pop('rising_edge_400', None)
for name, vector in sample_vectors.iteritems():
samples = vector[0]
expect_success = vector[1]
logic_levels = decode.find_logic_levels(samples)
if not expect_success:
continue # We expected find_logic_levels() to fail
if logic_levels is None:
#print('### Fail:', name)
self.fail('No logic levels found')
#print('####', name, logic_levels)
self.assertRelativelyEqual(logic_levels[0], 0.0, epsilon=0.16, msg='Bad logic 0: {}'.format(logic_levels[0]))
self.assertRelativelyEqual(logic_levels[1], 1.0, epsilon=0.1, msg='Bad logic 1: {}'.format(logic_levels[1]))
def test_spi_decode(self):
self.test_name = 'SPI message'
self.trial_count = 20
for i in xrange(self.trial_count):
self.update_progress(i + 1)
cpol = random.choice((0, 1))
cpha = random.choice((0, 1))
lsb_first = random.choice((True, False))
word_size = random.randint(8, 32)
clock_freq = random.uniform(1.0e3, 1.0e7)
msg = []
for _ in xrange(random.randint(4, 20)):
msg.append(random.randint(0, 2**word_size - 1))
use_edges = random.choice((True, False))
# msg = [3, 4, 5, 240]
# word_size = 8
# clock_freq = 30.0
# lsb_first = True
# cpol = 0
# cpha = 1
# use_edges = False
clk, mosi, cs = spi.spi_synth(msg, word_size, clock_freq, cpol,
cpha, lsb_first, 4.0 / clock_freq,
0.0)
if use_edges:
records_it = spi.spi_decode(
clk,
mosi,
cs,
cpol=cpol,
cpha=cpha,
lsb_first=lsb_first,
stream_type=streaming.StreamType.Edges)
else: # samples
#sr = 1.0e-2
sample_period = 1.0 / (20.0 * clock_freq)
#sample_period = 10.0e-2
clk_s = sigp.edges_to_sample_stream(clk, sample_period)
mosi_s = sigp.noisify(
sigp.edges_to_sample_stream(mosi, sample_period))
cs_s = sigp.noisify(
sigp.edges_to_sample_stream(cs, sample_period))
records_it = spi.spi_decode(clk_s,
mosi_s,
cs_s,
cpol=cpol,
cpha=cpha,
lsb_first=lsb_first)
records = list(records_it)
#print('\nDecoded:', [str(r) for r in records])
#print(records[-1].start_time, records[-1].end_time)
msg_ix = 0
match = True
frame_cnt = 0
for r in records:
if r.kind == 'SPI frame':
frame_cnt += 1
#print('Data:', r.data, msg[msg_ix])
if r.data != msg[msg_ix]:
match = False
break
msg_ix += 1
self.assertTrue(match, msg='Message not decoded successfully')
self.assertEqual(frame_cnt, len(msg),
'Missing or extra decoded messages')
