int comedi_get_clock_source(comedi_t * device, unsigned int subdevice, unsigned int channel, unsigned int * clock, unsigned int * period_ns);
Status
alpha
Overview
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.
Return value
0 on success, -1 on error.
Releases
7 releases since Debian 7 (Wheezy); the text changed 6 times.