| COMEDI_COMMAND(3) | Comedi reference | COMEDI_COMMAND(3) |
comedi_command - start streaming input/output
#include <comedilib.h>
int comedi_command(comedi_t * device, comedi_cmd * command);
The function comedi_command starts a streaming input or output. The command structure pointed to by command specifies settings for the acquisition. The command must be able to pass comedi_command_test with a return value of 0, or comedi_command will fail. For input subdevices, sample values are read using the function read on the device file descriptor. For output subdevices, sample values are written using the function write.
On success, 0 is returned. On failure, -1 is returned.
David Schleef <ds@schleef.org>
Frank Mori Hess <fmhess@users.sourceforge.net>
Herman Bruyninckx <Herman.Bruyninckx@mech.kuleuven.ac.be>
Bernd Porr <tech@linux-usb-daq.co.uk>
Ian Abbott <abbotti@mev.co.uk>
Éric Piel <piel@delmic.com>
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, 2015 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.
| 12/12/2020 | Comedi |