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PyLibNIDAQmx - a Python wrapper to libnidaqmx library

:Authors:

Pearu Peterson <pearu.peterson AT gmail DOT com>

:Download:

https://github.com/pearu/pylibnidaqmx

:Documentation:

https://sysbio.ioc.ee/download/software/pylibnidaqmx/

:License:

New BSD License

History

Project published on November 5, 2009.

Installation

To use pylibnidaqmx, the following is required:

Python 2.5 or newer
numpy package
libnidaqmx library

To install pylibnidaqmx, unpack the archive file, change to the pylibnidaqmx source directory PyLibNIDAQmx-?.?* (that contains setup.py file and nidaqmx package), and run::

python setup.py install

Basic usage

The nidaqmx Python package provides the following classes: AnalogInputTask, AnalogOutputTask, DigitalInputTask, DigitalOutputTask, CounterInputTask, CounterOutputTask that can be used to create NI-DAQ tasks and they have methods to create channels, setting timing and triggering properties and reading and writing data.

Here follows an example how to generate voltage:

from nidaqmx import AnalogOutputTask import numpy as np data = 9.95*np.sin(np.arange(1000, dtype=np.float64)2np.pi/1000) task = AnalogOutputTask() task.create_voltage_channel('Dev1/ao2', min_val=-10.0, max_val=10.0) task.configure_timing_sample_clock(rate=1000.0) task.write(data, auto_start=False) task.start() raw_input('Generating voltage continuously. Press Enter to interrupt..') task.stop() del task

and example how to measure and plot the voltage:

from nidaqmx import AnalogInputTask import numpy as np task = AnalogInputTask() task.create_voltage_channel('Dev1/ai16', terminal = 'rse', min_val=-10.0, max_val=10.0) task.configure_timing_sample_clock(rate=1000.0) task.start() data = task.read(2000, fill_mode='group_by_channel') del task from pylab import plot, show plot (data) show ()

If Dev1/ao2 and Dev1/ai16 are directly connected then you should see two sine waves plotted to screen.

Additional documentation is available online in PyLibNIDAQmx website.