added a simple ruby-script to stream gcode and made serial protocol more reprap-like

script/stream.rb

@@ -0,0 +1,38 @@
+require 'rubygems'
+require 'optparse'
+require 'serialport'
+
+
+options_parser = OptionParser.new do |opts|
+  opts.banner = "Usage: stream [options] gcode-file"
+  opts.on('-v', '--verbose', 'Output more information') do
+    $verbose = true
+  end   
+  
+  opts.on('-h', '--help', 'Display this screen') do
+    puts opts
+    exit
+  end
+end
+options_parser.parse!
+if ARGV.empty?
+  puts options_parser
+  exit
+end
+
+SerialPort.open('/dev/tty.usbserial-A4001o6L', 9600) do |sp|
+  ARGV.each do |file|
+    puts "Processing file #{file}"
+    prebuffer = 5
+    File.readlines(file).each do |line|
+      sp.write("#{line.strip}\r\n");
+      puts line.strip
+      if prebuffer == 0
+        result = sp.gets 
+        puts result unless result.strip == 'ok'
+      else
+        prebuffer -= 1
+      end
+    end
+  end
+end