comedi_set_other_source(3) select source signal for something other than a gate or clock


#include <comedilib.h>

int comedi_set_other_source(comedi_t * device, unsigned int subdevice, unsigned int channel, unsigned int other, unsigned int source);




This function allows selection of a source signal for something on a subdevice other than a gate (which uses comedi_set_gate_source) or a clock (which uses comedi_set_clock_source). The other parameter selects which "other" we are configuring, and is driver-dependent. The source parameter selects the source we which to use for the "other". If the subdevice does not support configuring its "other" sources on a per-channel basis, then the channel parameter will be ignored.

As an example, this function is used to select which PFI digital input channels should be used as the A/B/Z signals when running a counter on an NI M-Series board as a quadrature encoder. The other parameter selects either the A, B, or Z signal, and the source parameter is used to specify which PFI digital input channel the external A, B, or Z signal is physically connected to.

This function is only useable on subdevices that provide support for the INSN_CONFIG_SET_OTHER_SOURCE configuration instruction.


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.

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