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

NAME

6       comedi_dio_read - read single bit from digital channel
7

SYNOPSIS

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

DESCRIPTION

15       The function comedi_dio_read reads the channel channel belonging to the
16       subdevice subdevice of device device. The data value that is read is
17       stored in the *bit. This function is equivalent to:
18
19           comedi_data_read(device, subdevice, channel, 0, 0, bit);
20
21       This function does not require a digital subdevice or a subdevice with
22       a maximum data value of 1 to work properly.
23
24       If you wish to read multiple digital channels at once, it is more
25       efficient to use comedi_dio_bitfield2 than to call this function
26       multiple times.
27

RETURN VALUE

29       Return values and errors are the same as comedi_data_read.
30

AUTHORS

32       David Schleef <ds@schleef.org>
33           Author.
34
35       Frank Mori Hess <fmhess@users.sourceforge.net>
36           Author.
37
38       Herman Bruyninckx <Herman.Bruyninckx@mech.kuleuven.ac.be>
39           Author.
40
41       Bernd Porr <tech@linux-usb-daq.co.uk>
42           Author.
43
44       Ian Abbott <abbotti@mev.co.uk>
45           Author.
46
47       Éric Piel <piel@delmic.com>
48           Author.
49

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