#!/usr/bin/env ruby
# encoding: utf-8
# ruby: 1.9
require 'serialport'

atmolight = SerialPort.open("/dev/ttyUSB0",{ baud: 19200, databits: 8, parity: SerialPort::NONE, stop_bit: 1, flow_control: SerialPort::NONE})

# reset arduino
atmolight.dtr = 1
sleep 0.5
atmolight.dtr = 0
sleep 0.5
atmolight.flush_output
atmolight.flush_input
atmolight.baud = 19200
  
puts "waiting for welcome message"
puts atmolight.gets

puts "sending test commands"
commands = [
  "\x00\x80\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", # start bootloader
  "\x00\x87\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", # start application
  "\x1b\x1b\x1b\x1b\x1b\x1b\x1b\x1b\x1b\x1b\x1b\x1b\x1b\x1b\x1b\x00", # sync sequence
  "\x1b\x1b\x1b\x1b\x1b\x1b\x1b\x1b\x1b\x1b\x1b\x1b\x1b\x1b\x1b\x1b\x1b\x00", # too long sync sequence
  "\x00\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" # unhandled command
]
commands.each do |command|
  sleep 0.5
  atmolight.write command
  atmolight.flush_output
end

# test all LEDs with red
puts "cycle LEDs"
50.times do |i|
  atmolight.write [i,0x01,0x00,0x00,0x0f,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00].pack("C*") # set LED to red
  atmolight.flush_output
  atmolight.write [0x00,0x08,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00].pack("C*") # flush
  atmolight.flush_output
  sleep 0.25
  atmolight.write [i,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00].pack("C*") # switch off LED
  atmolight.flush_output
end

# increase white
puts "white fading"
atmolight.write "\x00\x87\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
atmolight.flush_output
sleep 0.5
white = 0
while true do
  start = Time.now
  51.times do |i|
    atmolight.write [i,0x01,0x00,0x00,white,white,white,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00].pack("C*") # set LED to red
    atmolight.flush_output
  end
  white = (white+10)%256
  puts "set white #{white} in #{Time.now-start} s"
end