1COMEDI_SET_FILTER(3)           Comedi reference           COMEDI_SET_FILTER(3)
2
3
4

NAME

6       comedi_set_filter - select a filter for a subdevice
7

SYNOPSIS

9       #include <comedilib.h>
10
11       int comedi_set_filter(comedi_t * device, unsigned int subdevice,
12                             unsigned int channel, unsigned int filter);
13

STATUS

15       alpha
16

DESCRIPTION

18       This function selects a filter for a subdevice. For instance, a digital
19       input subdevice may provide deglitching filters with varying cutoff
20       frequencies. The filters are used to prevent high-frequency noise from
21       causing unwanted transitions on the digital inputs. This function can
22       tell the hardware which deglitching filter to use, or to use none at
23       all.
24
25       The filter parameter selects which of the subdevice's filters to use,
26       and is driver-dependant.
27
28       This function is only useable on subdevices that provide support for
29       the INSN_CONFIG_FILTER configuration instruction.
30

RETURN VALUE

32       0 on success, -1 on error.
33

AUTHORS

35       David Schleef <ds@schleef.org>
36           Author.
37
38       Frank Mori Hess <fmhess@users.sourceforge.net>
39           Author.
40
41       Herman Bruyninckx <Herman.Bruyninckx@mech.kuleuven.ac.be>
42           Author.
43
44       Bernd Porr <tech@linux-usb-daq.co.uk>
45           Author.
46
47       Ian Abbott <abbotti@mev.co.uk>
48           Author.
49
50       Éric Piel <piel@delmic.com>
51           Author.
52

54       Copyright © 1998-2003 David Schleef
55       Copyright © 2001-2003, 2005, 2008 Frank Mori Hess
56       Copyright © 2002-2003 Herman Bruyninckx
57       Copyright © 2012 Bernd Porr
58       Copyright © 2012 Ian Abbott
59       Copyright © 2012, 2015 Éric Piel
60
61       This document is part of Comedilib. In the context of this document,
62       the term "source code" as defined by the license is interpreted as the
63       XML source.
64
65       This library is free software; you can redistribute it and/or modify it
66       under the terms of the GNU Lesser General Public License as published
67       by the Free Software Foundation, version 2.1 of the License.
68
69       This library is distributed in the hope that it will be useful, but
70       WITHOUT ANY WARRANTY; without even the implied warranty of
71       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
72       General Public License for more details.
73
74       You should have received a copy of the GNU Lesser General Public
75       License along with this library; if not, write to the Free Software
76       Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
77       USA.
78
79
80
81
82Comedi                            05/11/2017              COMEDI_SET_FILTER(3)
Impressum