# File /home/oliver/dev/powermate/PowerMate.rb, line 226
    def each_event( &block )
      while data = @device.read( EVENT_SIZE ) do
        rawevent = data.unpack( "l!l!s!s!i") # tv_sec, tv_nsec, type, code, value
        event = Input_event.new
	rawevent[0] += 1 if rawevent[0] = 0    # sometimes time is not set
        event.time = Time.at( rawevent[0], rawevent[1])
        event.type = rawevent[2]
        event.code = rawevent[3]
        event.value = rawevent[4]
        yield event
      end
    end