comedi_get_write_subdevice - find streaming output subdevice
#include <comedilib.h>
int comedi_get_write_subdevice (comedi_t * device);
The function comedi_get_write_subdevice() returns the subdevice that
allows streaming output for device dev. If no subdevice supports
streaming output, -1 is returned and the Comedilib error number is set
to XXX "subdevice not found".
28 October 2007