debian man page for comedi_dio_read

COMEDI_DIO_READ(3)						 Comedi reference						COMEDI_DIO_READ(3)

NAME
       comedi_dio_read - read single bit from digital channel

SYNOPSIS
       #include <comedilib.h>

       int comedi_dio_read(comedi_t * device, unsigned int subdevice, unsigned int channel, unsigned int * bit);

DESCRIPTION
       The function comedi_dio_read reads the channel channel belonging to the subdevice subdevice of device device. The data value that is read
       is stored in the *bit. This function is equivalent to:

	   comedi_data_read(device, subdevice, channel, 0, 0, bit);

       This function does not require a digital subdevice or a subdevice with a maximum data value of 1 to work properly.

       If you wish to read multiple digital channels at once, it is more efficient to use comedi_dio_bitfield2 than to call this function multiple
       times.

RETURN VALUE
       Return values and errors are the same as comedi_data_read.

AUTHORS
       David Schleef <ds@schleef.org>
	   Author.

       Frank Mori Hess <fmhess@users.sourceforge.net>
	   Author.

       Herman Bruyninckx <Herman.Bruyninckx@mech.kuleuven.ac.be>
	   Author.

       Bernd Porr <tech@linux-usb-daq.co.uk>
	   Author.

       Ian Abbott <abbotti@mev.co.uk>
	   Author.

COPYRIGHT
       Copyright (C) 1998-2003 David Schleef
       Copyright (C) 2001-2003, 2005, 2008 Frank Mori Hess
       Copyright (C) 2002-2003 Herman Bruyninckx
       Copyright (C) 2012 Bernd Porr
       Copyright (C) 2012 Ian Abbott

       This document is part of Comedilib. In the context of this document, the term "source code" as defined by the license is interpreted as the
       XML source.

       This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as
       published by the Free Software Foundation, version 2.1 of the License.

       This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

       You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software
       Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

Comedi								    07/06/2012							COMEDI_DIO_READ(3)