def read_data_chunksize
      p = FFI::MemoryPointer.new(:uint, 1)
      check_result(Ftdi.ftdi_read_data_get_chunksize(ctx, p))
      p.read_uint
    end
def read_data_chunksize
      p = FFI::MemoryPointer.new(:uint, 1)
      check_result(Ftdi.ftdi_read_data_get_chunksize(ctx, p))
      p.read_uint
    end
Gets read buffer chunk size.
 @return [Fixnum] Read buffer chunk size.
 @raise [StatusCodeError] libftdi reports error.
 @see #read_data_chunksize=