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An object-oriented interface for the Comedi drivers
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ian-abbott/pycomedi
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This package provides an object-oriented interface to the Comedi_ drivers. The standard Python interface bundled with Comedilib is a simple SWIG clone of the C interface. In pycomedi, we convert the functions into class methods (see ``pycomedi.classes``), so you don't have to worry about dragging around opaque types like ``comedi_t *`` device pointers. We also bundle related constants together in ``_Enums`` and ``_Flags`` (see ``pycomedi.constants``), to make handling common operations like flag manipulations simpler. Finally, there are a number of utility classes (see ``pycomedi.utility``) to make common tasks like creating instructions or reading hardware-timed analog input easier. Installation ============ Packages -------- Gentoo ~~~~~~ I've packaged pycomedi for Gentoo. You need layman_ and my `wtk overlay`_. Install with:: # emerge -av app-portage/layman # layman --add wtk # emerge -av dev-python/pycomedi Dependencies ------------ If you're installing by hand or packaging pycomedi for another distribution, you'll need the following dependencies: ============ =================== ================ ============================== Package Purpose Debian_ Gentoo_ ============ =================== ================ ============================== NumPy_ ? python-numpy dev-python/numpy SciPy_ testing python-scipy sci-libs/scipy Comedi_ Comedilib interface python-comedilib sci-libs/comedilib [#wtk]_ nose_ testing python-nose dev-python/nose Cython_ Comedilib interface cython dev-python/cython python-kmod_ Optional ext. info. dev-python/python-kmod [#wtk]_ ============ =================== ================ ============================== .. [#wtk] In the `wtk overlay`_. If python-kmod is installed, you will get additional module information from the ``info.py`` demo program. If it is not installed, everything will still work, but ``info.py`` will only be able to get the module version, not the kernel version, staging-ness, parameters, etc. Installing by hand ------------------ Pycomedi is available as a Git_ repository:: $ git clone git:https://tremily.us/pycomedi.git See the homepage_ for details. To install the checkout, run the standard:: $ python setup.py install Usage ===== See the examples in the ``doc`` directory. Testing ======= Run integration tests with:: $ nosetests --with-doctest --doctest-extension=txt doc The analog integration tests read from analog input channels 0 through 3, and write to analog output channels 0 and 1, so you'll need a board with that many channels. You should also make sure that the analog output channels aren't plugged into anything sensetive, since the tests sweep their output around over a reasonable chunk of the channel range. Some of the internal unit tests also write, so it's safest to just disconnect all digital lines and analog outputs before running the tests. Run both integration tests and internal unit tests with:: $ ./test.sh Licence ======= This project is distributed under the `GNU General Public License Version 2`_ or greater. Author ====== W. Trevor King [email protected] .. _Comedi: https://www.comedi.org/ .. _layman: https://layman.sourceforge.net/ .. _wtk overlay: https://blog.tremily.us/posts/Gentoo_overlay/ .. _science overlay: https://overlays.gentoo.org/proj/science/wiki/en .. _Debian: https://www.debian.org/ .. _Gentoo: https://www.gentoo.org/ .. _NumPy: https://numpy.scipy.org/ .. _SciPy: https://www.scipy.org/ .. _nose: https://somethingaboutorange.com/mrl/projects/nose/ .. _Cython: https://www.cython.org/ .. _python-kmod: https://github.com/agrover/python-kmod/ .. _Git: https://git-scm.com/ .. _homepage: https://blog.tremily.us/posts/pycomedi/ .. _GNU General Public License Version 2: https://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
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