comedi_arm_channel — arm a subdevice channel


#include <comedilib.h>
int comedi_arm_channel(comedi_t * device,
 unsigned int subdevice,
 unsigned int channel,
 unsigned int source);




This function arms a specified channel of a subdevice. It may, for example, arm a counter to begin counting. The source parameter specifies what source should trigger the subdevice to begin. The possible sources are driver-dependant. This function is only useable on subdevices that provide support for the INSN_CONFIG_ARM configuration instruction. Some subdevices treat this as an instruction to arm the whole subdevice and ignore the specified channel. For such subdevices, comedi_arm is normally called instead.

Return value

0 on success, -1 on error.