comedi_dio_config(3) change input/output properties of channel


#include <comedilib.h>

int comedi_dio_config(comedi_t * device, unsigned int subdevice, unsigned int channel, unsigned int direction);


The function comedi_dio_config configures individual channels in a digital I/O subdevice to be either input or output, depending on the value of direction. Valid directions are COMEDI_INPUT or COMEDI_OUTPUT.

Depending on the characteristics of the hardware device, multiple channels might be grouped together in hardware when configuring the input/output direction. In this case, a single call to comedi_dio_config for any channel in the group will affect the entire group.


If successful, 0 is returned, otherwise -1.


David Schleef <[email protected]>


Frank Mori Hess <[email protected]>


Herman Bruyninckx <[email protected]>


Bernd Porr <[email protected]>


Ian Abbott <[email protected]>


Éric Piel <[email protected]>



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.