def test_read_data(self):
print "Testing reading data from the oscilloscope."
scope = Oscilloscope()
assert scope.setup()
assert scope.open_handle()
assert scope.flash_firmware()
ch1_data, _ = scope.read_data(data_size=0x400)
print ch1_data
assert ch1_data
assert scope.close_handle()
def test_set_one_channel_and_read(self):
print "Testing setting one channel and reading it."
scope = Oscilloscope()
assert scope.setup()
assert scope.open_handle()
assert scope.flash_firmware(mod_firmware_01)
assert scope.set_ch1_voltage_range(0xA)
assert scope.set_sample_rate(0x10)
assert scope.set_num_channels(1)
ch1_data, ch2_data = scope.read_data(0x4000)
assert ch1_data
assert not ch2_data
assert scope.close_handle()
def test_data_scaling(self):
print "Testing setting various scale facotrs and reading."
scale_factor = 0x01
scope = Oscilloscope()
assert scope.setup()
assert scope.open_handle()
assert scope.flash_firmware()
assert scope.set_ch1_voltage_range(scale_factor)
assert scope.set_sample_rate(27)
ch1_data, _ = scope.read_data(0x100000)
ch1_data = scope.scale_read_data(ch1_data, scale_factor)
print "Max:", max(ch1_data), "(V), Min:", min(ch1_data), "(V)"
assert ch1_data
assert scope.close_handle()
def test_read_many_sizes(self):
print "Testing reading many different data sizes"
scope = Oscilloscope()
assert scope.setup()
assert scope.open_handle()
assert scope.flash_firmware()
data_size = 0x400
for _ in xrange(11):
print "DATA SIZE", data_size
ch1_data, ch2_data = scope.read_data(data_size=data_size, raw=True)
print len(ch1_data)
print len(ch2_data)
assert ch1_data, ch2_data
data_size <<= 1
assert scope.close_handle()
new_data = data[:window]
for i, point in enumerate(data[window:-window]):
new_data.append(sum(data[i-window:i+window+1])/(2*window+1))
new_data.extend(data[-window:])
return new_data
sample_rate_index = 0x04
voltage_range = 0x01
data_points = 0x2000
scope = Oscilloscope()
scope.setup()
scope.open_handle()
scope.set_sample_rate(sample_rate_index)
scope.set_ch1_voltage_range(voltage_range)
ch1_data, _ = scope.read_data(data_points)
voltage_data = scope.scale_read_data(ch1_data, voltage_range)
timing_data, _ = scope.convert_sampling_rate_to_measurement_times(data_points, sample_rate_index)
scope.close_handle()
pylab.title('Scope Visualization Example')
pylab.plot(timing_data, voltage_data, color='#009900', label='Raw Trace')
pylab.plot(timing_data, apply_data_smoothing(voltage_data, window=3), color='#0033CC', label='Smoothed Trace')
pylab.xlabel('Time (s)')
pylab.ylabel('Voltage (V)')
pylab.grid()
pylab.legend(loc='best')
pylab.xticks(rotation=30)
pylab.tight_layout()
pylab.show()
sample_rate_index = 1
voltage_range = 0x01
cal_freq = 10
# skip first samples due to unstable xfer
skip = 2 * 0x400
data_points = skip + 20 * 0x400
scope = Oscilloscope()
scope.setup()
scope.open_handle()
scope.set_sample_rate(sample_rate_index)
scope.set_ch1_voltage_range(voltage_range)
print(scope.set_calibration_frequency(cal_freq))
ch1_data, _ = scope.read_data(data_points) #,raw=True)#timeout=1)
voltage_data = scope.scale_read_data(ch1_data[skip:], voltage_range)
timing_data, _ = scope.convert_sampling_rate_to_measurement_times(
data_points - skip, sample_rate_index)
scope.close_handle()
if len(timing_data) != len(voltage_data):
w = sys.stderr.write
w('data lengths differ!\n')
w(str([(s, len(eval(s + '_data'))) for s in 'timing voltage'.split()]))
w('\n')
exit(1)
# store the data
with open('/tmp/scopevis.dat', 'wt') as ouf:
for i, point in enumerate(data[window:-window]):
new_data.append(sum(data[i-window:i+window+1])/(2*window+1))
new_data.extend(data[-window:])
return new_data
sample_rate_index = 0x04
voltage_range = 0x01
data_points = 0x2000
scope = Oscilloscope()
scope.setup()
scope.open_handle()
scope.set_sample_rate(sample_rate_index)
scope.set_ch1_voltage_range(voltage_range)
ch1_data, _ = scope.read_data(data_points)#,raw=True)#timeout=1)
voltage_data = scope.scale_read_data(ch1_data, voltage_range)
timing_data, _ = scope.convert_sampling_rate_to_measurement_times(data_points, sample_rate_index)
scope.close_handle()
if len(timing_data) != len(voltage_data):
w = sys.stderr.write
w('data lengths differ!\n')
w(str([(s,len(eval(s+'_data')))for s in 'timing voltage'.split()]))
w('\n')
exit(1)
# store the data
with open('/tmp/scopevis.dat', 'wt') as ouf:
ouf.write('\n'.join('{:8f}'.format(v) for v in voltage_data))
new_data.append(
sum(data[i - window:i + window + 1]) / (2 * window + 1))
new_data.extend(data[-window:])
return new_data
sample_rate_index = 0x04
voltage_range = 0x01
data_points = 0x2000
scope = Oscilloscope()
scope.setup()
scope.open_handle()
scope.set_sample_rate(sample_rate_index)
scope.set_ch1_voltage_range(voltage_range)
ch1_data, _ = scope.read_data(data_points)
voltage_data = scope.scale_read_data(ch1_data, voltage_range)
timing_data, _ = scope.convert_sampling_rate_to_measurement_times(
data_points, sample_rate_index)
scope.close_handle()
pylab.title('Scope Visualization Example')
pylab.plot(timing_data, voltage_data, color='#009900', label='Raw Trace')
pylab.plot(timing_data,
apply_data_smoothing(voltage_data, window=3),
color='#0033CC',
label='Smoothed Trace')
pylab.xlabel('Time (s)')
pylab.ylabel('Voltage (V)')
pylab.grid()
pylab.legend(loc='best')
pylab.xticks(rotation=30)
