comedi_cancel - stop streaming input/output in progress
int comedi_cancel (comedi_t * device, unsigned int subdevice);
The function comedi_cancel() can be used to stop a Comedi command
previously started by comedi_command() that is still in progress on the
subdevice indicated by the parameters device and subdevice. This may
not return the subdevice to a ready state, since there may be samples
in the buffer that need to be read.
If sucessful, 0 is returned, otherwise -1.
28 October 2007