COMEDI_DATA_READ_DEL(3) Comedi reference COMEDI_DATA_READ_DEL(3)
NAME
comedi_data_read_delayed - read single sample from channel after delaying for specified settling time
SYNOPSIS
#include <comedilib.h>
int comedi_data_read_delayed(comedi_t * device, unsigned int subdevice, unsigned int channel, unsigned int range, unsigned int aref,
lsampl_t * data, unsigned int nanosec);
DESCRIPTION
Similar to comedi_data_read except it will wait for the specified number of nanoseconds between setting the input channel and taking a
sample. For analog inputs, most boards have a single analog to digital converter which is multiplexed to be able to read multiple channels.
If the input is not allowed to settle after the multiplexer switches channels, the reading will be inaccurate. This function is useful for
allowing a multiplexed analog input to settle when switching channels.
Although the settling time is specified in nanoseconds, the actual settling time will be rounded up to the nearest microsecond.
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_DATA_READ_DEL(3)