NAME

       comedi_set_filter - select a filter for a subdevice

SYNOPSIS

       #include <comedilib.h>

       int comedi_set_filter(comedi_t * device, unsigned int subdevice, unsigned int channel,
                             unsigned int filter);

STATUS

       alpha

DESCRIPTION

       This function selects a filter for a subdevice. For instance, a digital input subdevice
       may provide deglitching filters with varying cutoff frequencies. The filters are used to
       prevent high-frequency noise from causing unwanted transitions on the digital inputs. This
       function can tell the hardware which deglitching filter to use, or to use none at all.

       The filter parameter selects which of the subdevice's filters to use, and is
       driver-dependant.

       This function is only useable on subdevices that provide support for the
       INSN_CONFIG_FILTER configuration instruction.

RETURN VALUE

       0 on success, -1 on error.

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.

       Éric Piel <piel@delmic.com>
           Author.

COPYRIGHT

       Copyright © 1998-2003 David Schleef
       Copyright © 2001-2003, 2005, 2008 Frank Mori Hess
       Copyright © 2002-2003 Herman Bruyninckx
       Copyright © 2012 Bernd Porr
       Copyright © 2012 Ian Abbott
       Copyright © 2012 Éric Piel

       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.