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       comedi_cancel - stop streaming input/output in progress


       #include <comedilib.h>

       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