comedi_set_other_source — 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_SRC
configuration instruction.