Ruby with joystick

ppm.rb

require "rubygems"
require "rjoystick"
require "serialport"

#=begin
# example 1
#
#
# ARGV[0] => /dev/input/jsX


#rc-werte
rc_chan = Array.new(8,127) #create 8 channels and set them to 1500 [µs]

invert = 1
last_update = Time.now

k = Rjoystick::Device.new("/dev/input/js0")

	puts k.axes
	puts k.buttons
	puts k.name
	puts k.version
	puts k.axes_maps

while true

	now = Time.now
	if((now-last_update)*1000.0 >20.0) #check all 50ms (20Hz) to update signal
		puts "#{rc_chan}"
		last_update = Time.now
	end
			e = k.event
		if e.type == Rjoystick::Event::JSAXIS
			if(e.number==3 || e.number ==1) #invert axis 1 and 3
			invert = -1
			else
			invert = 1
			end
			rc_chan[e.number] = (128 + (128.000/32768.000)*invert*e.value).to_i
		end	
end