'\" t
.\"     Title: comedi_internal_trigger
.\"    Author: David Schleef <ds@schleef.org>
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: 12/12/2020
.\"    Manual: Comedi reference
.\"    Source: Comedi
.\"  Language: English
.\"
.TH "COMEDI_INTERNAL_TRIG" "3" "12/12/2020" "Comedi" "Comedi reference"
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.SH "NAME"
comedi_internal_trigger \- generate soft trigger
.SH "SYNOPSIS"
.sp
.ft B
.nf
#include <comedilib\&.h>
.fi
.ft
.HP \w'int\ comedi_internal_trigger('u
.BI "int comedi_internal_trigger(comedi_t\ *\ " "device" ", unsigned\ int\ " "subdevice" ", unsigned\ int\ " "trig_num" ");"
.SH "DESCRIPTION"
.PP
This function sends an
\fBINSN_INTTRIG\fR
instruction to a subdevice, which causes an internal triggering event\&. This event can, for example, trigger a subdevice to start an asynchronous command\&.
.PP
The
\fItrig_num\fR
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
\fIstart_src\fR
of
\fBTRIG_INT\fR, and a
\fIstart_arg\fR
of
5\&. Then the start event would only be triggered if
\fBcomedi_internal_trigger\fR
were called on the subdevice with a
\fItrig_num\fR
equal to the same value of
5\&.
.SH "RETURN VALUE"
.PP
0
on success,
\-1
on error\&.
.PP
.SH "AUTHORS"
.PP
\fBDavid Schleef\fR <\&ds@schleef.org\&>
.RS 4
Author.
.RE
.PP
\fBFrank Mori Hess\fR <\&fmhess@users.sourceforge.net\&>
.RS 4
Author.
.RE
.PP
\fBHerman Bruyninckx\fR <\&Herman.Bruyninckx@mech.kuleuven.ac.be\&>
.RS 4
Author.
.RE
.PP
\fBBernd Porr\fR <\&tech@linux-usb-daq.co.uk\&>
.RS 4
Author.
.RE
.PP
\fBIan Abbott\fR <\&abbotti@mev.co.uk\&>
.RS 4
Author.
.RE
.PP
\fB\('Eric Piel\fR <\&piel@delmic.com\&>
.RS 4
Author.
.RE
.SH "COPYRIGHT"
.br
Copyright \(co 1998-2003 David Schleef
.br
Copyright \(co 2001-2003, 2005, 2008 Frank Mori Hess
.br
Copyright \(co 2002-2003 Herman Bruyninckx
.br
Copyright \(co 2012 Bernd Porr
.br
Copyright \(co 2012 Ian Abbott
.br
Copyright \(co 2012, 2015 \('Eric Piel
.br
.PP
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.
.PP
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.
.PP
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.
.PP
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.
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