comedi_get_clock_source - get master clock for a subdevice

DavidSchleef <ds@schleef.org>
           Author.

       FrankMoriHess <fmhess@users.sourceforge.net>
           Author.

       HermanBruyninckx <Herman.Bruyninckx@mech.kuleuven.ac.be>
           Author.

       BerndPorr <tech@linux-usb-daq.co.uk>
           Author.

       IanAbbott <abbotti@mev.co.uk>
           Author.

       ÉricPiel <piel@delmic.com>
           Author.

       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.

Comedi                                             08/06/2025                            COMEDI_GET_CLOCK_SOU(3)

       This function queries the master clock for a subdevice, as set by comedi_set_clock_source. The currently
       configured master clock will be written to *clock. The possible values and their corresponding clocks are
       driver-dependant. The period of the clock in nanoseconds (or zero if it is unknown) will be written to
       *period_ns. If the subdevice does not support configuring its master clocks on a per-channel basis, then
       the channel parameter will be ignored.

       It is safe to pass NULL pointers as the clock or period_ns parameters. This function is only useable on
       subdevices that provide support for the INSN_CONFIG_GET_CLOCK_SRC configuration instruction.

       comedi_get_clock_source - get master clock for a subdevice

       0 on success, -1 on error.

       alpha

#include<comedilib.h>intcomedi_get_clock_source(comedi_t*device,unsignedintsubdevice,unsignedintchannel,unsignedint*clock,unsignedint*period_ns);