Examples¶
nifgen_arb_waveform.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 | #!/usr/bin/python
import argparse
import math
import nifgen
import sys
import time
def create_waveform_data(number_of_samples):
waveform_data = []
angle_per_sample = (2 * math.pi) / number_of_samples
for i in range(number_of_samples):
waveform_data.append(math.sin(i * angle_per_sample) * math.sin(i * angle_per_sample * 20))
return waveform_data
def example(resource_name, options, samples, gain, offset, gen_time):
waveform_data = create_waveform_data(samples)
with nifgen.Session(resource_name=resource_name, options=options) as session:
session.output_mode = nifgen.OutputMode.ARB
waveform = session.create_waveform(waveform_data_array=waveform_data)
session.configure_arb_waveform(waveform_handle=waveform, gain=gain, offset=offset)
with session.initiate():
time.sleep(gen_time)
def _main(argsv):
parser = argparse.ArgumentParser(description='Continuously generates an arbitrary waveform.', formatter_class=argparse.ArgumentDefaultsHelpFormatter)
parser.add_argument('-n', '--resource-name', default='PXI1Slot2', help='Resource name of a National Instruments Arbitrary Waveform Generator')
parser.add_argument('-s', '--samples', default=100000, type=int, help='Number of samples')
parser.add_argument('-g', '--gain', default=1.0, type=float, help='Gain')
parser.add_argument('-o', '--offset', default=0.0, type=float, help='DC offset (V)')
parser.add_argument('-t', '--time', default=5.0, type=float, help='Generation time (s)')
parser.add_argument('-op', '--option-string', default='', type=str, help='Option string')
args = parser.parse_args(argsv)
example(args.resource_name, args.option_string, args.samples, args.gain, args.offset, args.time)
def main():
_main(sys.argv[1:])
def test_example():
options = {'simulate': True, 'driver_setup': {'Model': '5433 (2CH)', 'BoardType': 'PXIe', }, }
example('PXI1Slot2', options, 100000, 1.0, 0.0, 5.0)
def test_main():
cmd_line = ['--option-string', 'Simulate=1, DriverSetup=Model:5433 (2CH);BoardType:PXIe', ]
_main(cmd_line)
if __name__ == '__main__':
main()
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nifgen_standard_function.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 | #!/usr/bin/python
import argparse
import nifgen
import sys
import time
def example(resource_name, options, waveform, frequency, amplitude, offset, phase, gen_time):
with nifgen.Session(resource_name=resource_name, options=options) as session:
session.output_mode = nifgen.OutputMode.FUNC
session.configure_standard_waveform(waveform=nifgen.Waveform[waveform], amplitude=amplitude, frequency=frequency, dc_offset=offset, start_phase=phase)
with session.initiate():
time.sleep(gen_time)
def _main(argsv):
supported_waveforms = list(nifgen.Waveform.__members__.keys())[:-1] # no support for user-defined waveforms in example
parser = argparse.ArgumentParser(description='Generates the standard function.', formatter_class=argparse.ArgumentDefaultsHelpFormatter)
parser.add_argument('-n', '--resource-name', default='PXI1Slot2', help='Resource name of a National Instruments Function Generator')
parser.add_argument('-w', '--waveform', default=supported_waveforms[0], choices=supported_waveforms, type=str.upper, help='Standard waveform')
parser.add_argument('-f', '--frequency', default=1000, type=float, help='Frequency (Hz)')
parser.add_argument('-a', '--amplitude', default=1.0, type=float, help='Amplitude (Vpk-pk)')
parser.add_argument('-o', '--offset', default=0.0, type=float, help='DC offset (V)')
parser.add_argument('-p', '--phase', default=0.0, type=float, help='Start phase (deg)')
parser.add_argument('-t', '--time', default=5.0, type=float, help='Generation time (s)')
parser.add_argument('-op', '--option-string', default='', type=str, help='Option string')
args = parser.parse_args(argsv)
example(args.resource_name, args.option_string, args.waveform, args.frequency, args.amplitude, args.offset, args.phase, args.time)
def main():
_main(sys.argv[1:])
def test_example():
options = {'simulate': True, 'driver_setup': {'Model': '5433 (2CH)', 'BoardType': 'PXIe', }, }
example('PXI1Slot2', options, 'SINE', 1000, 1.0, 0.0, 0.0, 5.0)
def test_main():
cmd_line = ['--option-string', 'Simulate=1, DriverSetup=Model:5433 (2CH);BoardType:PXIe', ]
_main(cmd_line)
if __name__ == '__main__':
main()
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