Examples¶
nidcpower_measure_record.py¶
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 | #!/usr/bin/python
import argparse
import nidcpower
import sys
def example(resource_name, channels, options, voltage, length):
with nidcpower.Session(resource_name=resource_name, channels=channels, options=options) as session:
# Configure the session.
session.measure_record_length = length
session.measure_record_length_is_finite = True
session.measure_when = nidcpower.MeasureWhen.AUTOMATICALLY_AFTER_SOURCE_COMPLETE
session.voltage_level = voltage
session.commit()
print('Effective measurement rate: {0} S/s'.format(session.measure_record_delta_time / 1))
samples_acquired = 0
print(' # Voltage Current In Compliance')
row_format = '{0:3d}: {1:8.6f} {2:8.6f} {3}'
with session.initiate():
while samples_acquired < length:
measurements = session.fetch_multiple(count=session.fetch_backlog)
samples_acquired += len(measurements)
for i in range(len(measurements)):
print(row_format.format(i, measurements[i].voltage, measurements[i].current, measurements[i].in_compliance))
def _main(argsv):
parser = argparse.ArgumentParser(description='Outputs the specified voltage, then takes the specified number of voltage and current readings.', formatter_class=argparse.ArgumentDefaultsHelpFormatter)
parser.add_argument('-n', '--resource-name', default='PXI1Slot2', help='Resource name of a National Instruments SMU')
parser.add_argument('-c', '--channels', default='0', help='Channel(s) to use')
parser.add_argument('-l', '--length', default='20', type=int, help='Measure record length')
parser.add_argument('-v', '--voltage', default=5.0, type=float, help='Voltage level (V)')
parser.add_argument('-op', '--option-string', default='', type=str, help='Option string')
args = parser.parse_args(argsv)
example(args.resource_name, args.channels, args.option_string, args.voltage, args.length)
def main():
_main(sys.argv[1:])
def test_example():
options = {'simulate': True, 'driver_setup': {'Model': '4162', 'BoardType': 'PXIe', }, }
example('PXI1Slot2', '0', options, 5.0, 20)
def test_main():
cmd_line = ['--option-string', 'Simulate=1, DriverSetup=Model:4162; BoardType:PXIe', ]
_main(cmd_line)
if __name__ == '__main__':
main()
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nidcpower_source_delay_measure.py¶
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 | #!/usr/bin/python
import argparse
import datetime
import nidcpower
import sys
def print_fetched_measurements(measurements):
print(' Voltage : {:f} V'.format(measurements[0].voltage))
print(' Current: {:f} A'.format(measurements[0].current))
print(' In compliance: {0}'.format(measurements[0].in_compliance))
def example(resource_name, channels, options, voltage1, voltage2, delay):
timeout = datetime.timedelta(seconds=(delay + 1.0))
with nidcpower.Session(resource_name=resource_name, channels=channels, options=options) as session:
# Configure the session.
session.source_mode = nidcpower.SourceMode.SINGLE_POINT
session.output_function = nidcpower.OutputFunction.DC_VOLTAGE
session.current_limit = .06
session.voltage_level_range = 5.0
session.current_limit_range = .06
session.source_delay = datetime.timedelta(seconds=delay)
session.measure_when = nidcpower.MeasureWhen.AUTOMATICALLY_AFTER_SOURCE_COMPLETE
session.voltage_level = voltage1
with session.initiate():
print('Voltage 1:')
print_fetched_measurements(session.fetch_multiple(count=1, timeout=timeout))
session.voltage_level = voltage2 # on-the-fly set
print('Voltage 2:')
print_fetched_measurements(session.fetch_multiple(count=1, timeout=timeout))
session.output_enabled = False
def _main(argsv):
parser = argparse.ArgumentParser(description='Outputs voltage 1, waits for source delay, and then takes a measurement. Then orepeat with voltage 2.', formatter_class=argparse.ArgumentDefaultsHelpFormatter)
parser.add_argument('-n', '--resource-name', default='PXI1Slot2', help='Resource name of a National Instruments SMU')
parser.add_argument('-c', '--channels', default='0', help='Channel(s) to use')
parser.add_argument('-v1', '--voltage1', default=1.0, type=float, help='Voltage level 1 (V)')
parser.add_argument('-v2', '--voltage2', default=2.0, type=float, help='Voltage level 2 (V)')
parser.add_argument('-d', '--delay', default=0.05, type=float, help='Source delay (s)')
parser.add_argument('-op', '--option-string', default='', type=str, help='Option string')
args = parser.parse_args(argsv)
example(args.resource_name, args.channels, args.option_string, args.voltage1, args.voltage2, args.delay)
def main():
_main(sys.argv[1:])
def test_main():
cmd_line = ['--option-string', 'Simulate=1, DriverSetup=Model:4162; BoardType:PXIe', ]
_main(cmd_line)
def test_example():
options = {'simulate': True, 'driver_setup': {'Model': '4162', 'BoardType': 'PXIe', }, }
example('PXI1Slot2', '0', options, 1.0, 2.0, 0.05)
if __name__ == '__main__':
main()
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