print "Average: {} MB/s".format(sum(rates) / (len(rates) * 1e6))
return rates
voltage_range = 0x01
time_fxn = time.time
scope = Oscilloscope()
scope.setup()
scope.open_handle()
scope.set_ch1_voltage_range(voltage_range)
for sample_rate_index in [0x30, 0x10, 0x08, 0x04, 0x01, 0x32, 0x14, 0x0A]:
scope.set_sample_rate(sample_rate_index)
_, label = scope.convert_sampling_rate_to_measurement_times(
1, sample_rate_index)
print "Sample rate: {}".format(label)
print "-" * 40
for data_points in [
0x800, 0x1000, 0x8000, 0x10000, 0x80000, 0x100000, 0x200000
]:
reader_fxn = scope.build_data_reader(raw=True)
times = []
times_append = times.append
times_append(time_fxn())
for _ in xrange(iterations):
ch1_data, _ = reader_fxn(data_points)
times_append(time_fxn())
print "Raw Mode, Data Points: 0x{:x}".format(data_points)
print_report(times, data_points)
# 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:
ouf.write('\n'.join('{:8f}'.format(v) for v in voltage_data))
ouf.write('\n')
pylab.title('Scope Visualization Example')
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()
rates.append(rate)
print "Average: {} MB/s".format(sum(rates)/(len(rates)*1e6))
return rates
voltage_range = 0x01
time_fxn = time.time
scope = Oscilloscope()
scope.setup()
scope.open_handle()
scope.set_ch1_voltage_range(voltage_range)
for sample_rate_index in [0x30, 0x10, 0x08, 0x04, 0x01, 0x32, 0x14, 0x0A]:
scope.set_sample_rate(sample_rate_index)
_, label = scope.convert_sampling_rate_to_measurement_times(1, sample_rate_index)
print "Sample rate: {}".format(label)
print "-"*40
for data_points in [0x800, 0x1000, 0x8000, 0x10000, 0x80000, 0x100000, 0x200000]:
reader_fxn = scope.build_data_reader(raw=True)
times = []
times_append = times.append
times_append(time_fxn())
for _ in xrange(iterations):
ch1_data, _ = reader_fxn(data_points)
times_append(time_fxn())
print "Raw Mode, Data Points: 0x{:x}".format(data_points)
print_report(times, data_points)
reader_fxn = scope.build_data_reader()
times = []
