COMEDI_DO_INSN(3) Comedi reference COMEDI_DO_INSN(3)
NAME
comedi_do_insn - perform instruction
SYNOPSIS
#include <comedilib.h>
int comedi_do_insn(comedi_t * device, comedi_insn * instruction);
DESCRIPTION
The function comedi_do_insn performs a single instruction.
RETURN VALUE
If successful, returns a non-negative number. For the case of INSN_READ or INSN_WRITE instructions, comedi_do_insn returns the number of
samples read or written, which may be less than the number requested. If there is an error, -1 is returned.
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_DO_INSN(3)