comedi_set_read_subdevice — set streaming input subdevice


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


Works for Linux "in-tree" Comedi since kernel version 3.19.


The function comedi_set_read_subdevice sets subdevice as the current read subdevice if the subdevice supports streaming input commands.

No action is performed if subdevice is already the current read subdevice.

Changes are local to the open file description for this device and have no effect on other open file descriptions for the underlying device node.

Return value

On success, 0 is returned. On failure, -1 is returned.