SONGetADCData

  SONGETADCDATA returns data for Adc, AdcMark, RealWave ( and RealMark?)
  data channels

  Implemented through SONGetADCData.dll

  [npoints, bTime, data]=SONGETADCDATA(fh, chan,...
                maxpoints, sTime, eTime{, FilterMask})

             INPUTS: FH = file handle
                     CHAN = channel number 0 to SONMAXCHANS-1
                     MAXPOINTS = Maximum number of data points to return
                                    The routine will calculate MAXPOINTS
                                    if this is passed as zero or less.
                     STIME  = the start time for the data search
                                    (in clock ticks)
                     ETIME = the end time for teh search
                                     (in clock ticks)
                     FILTERMASK  if present is  a filter mask structure
                                    There will be no filtering if this is
                                    absent.
            OUTPUTS: NPOINTS= number of data points returned
                                or a negative error
                     BTIME = the time for the first sample returned in
                                data (in clock ticks)
                     DATA = the output data array

  Alternative call:
  [npoints, bTime]=SONGETADCDATA(fh, chan,...
                data, sTime, eTime{, FilterMask})
  Here, DATA must be a pre-allocated int16 column vector. SON32.DLL will
  place data directly into this array in the matlab workspace. For repeated
  calls, this can be faster but it breaks normal matlab conventions.

  For error codes returned in NPOINTS see the CED documentation

  Author:Malcolm Lidierth
  Matlab SON library:
  Copyright © The Author & King's College London 2005-2006