comedi_arm — arm a subdevice


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




This function arms 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 a specific channel. For those subdevices, this function will arm channel 0 and comedi_arm_channel should be called instead of this one to specify the channel.

Return value

0 on success, -1 on error.