[Comedi][] is a Linux COntrol and MEasurement Device Interface.  We
use Comedi in our lab to contol [[experiments|Research]] via a [NI
PCI-6052E][6052E].  The basic architecture for a Comedi application
is:

    kernel space   |   user space
                   |
    device         |
      |            |
    kernel --------|-- libcomedi - application
      |            |
    comedi module  |

To make matters more complicated, there are two version of the kernel
module, one [in Git at comedi.org][external] and another [in the
kernel itself][kernel].

Luckily, many distributions now package versions of the in-kernel
staging driver (e.g. [Debian][] and [Ubuntu][]).  I was feeling left
out on Gentoo, so I've just revived the [old Gentoo packages][gentoo]
and added them to my [[Gentoo overlay]].

[Comedi]: http://www.comedi.org/
[6052E]: http://sine.ni.com/nips/cds/view/p/lang/en/nid/2601
[external]: http://comedi.org/git?p=comedi/comedi.git;a=summary
[kernel]: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=tree;f=drivers/staging/comedi;hb=HEAD
[Debian]: http://packages.debian.org/sid/python-comedilib
[Ubuntu]: http://packages.ubuntu.com/natty/python-comedilib
[Gentoo]: http://sources.gentoo.org/cgi-bin/viewvc.cgi/gentoo-x86/sci-libs/comedilib/?hideattic=0

[[!tag tags/linux]]
[[!tag tags/programming]]
[[!tag tags/tools]]
[[!tag tags/hardware]]