comedi_internal_trigger(3) generate soft trigger


#include <comedilib.h>

int comedi_internal_trigger(comedi_t * device, unsigned int subdevice, unsigned int trig_num);


This function sends an INSN_INTTRIG instruction to a subdevice, which causes an internal triggering event. This event can, for example, trigger a subdevice to start an asynchronous command.

The trig_num parameter is reserved for future use, and should be set to 0. It is likely it will be used in the future to support multiple independent internal triggers. For example, an asynchronous command might be specified for a subdevice with a start_src of TRIG_INT, and a start_arg of 5. Then the start event would only be triggered if comedi_internal_trigger were called on the subdevice with a trig_num equal to the same value of 5.


0 on success, -1 on error.


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.