Class: Trixter

Inherits:
EventHandler show all
Defined in:
lib/trixter/trixter.rb

Instance Method Summary collapse

Methods inherited from EventHandler

#handleEvent, #leftControlDown, #leftControlLeft, #leftControlRight, #leftControlUp, #leftGearDown, #leftGearUp, #rightControlLeft, #rightControlRight, #rightControlUp, #seatingChanged

Constructor Details

#initialize(port) ⇒ Trixter

Returns a new instance of Trixter.



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# File 'lib/trixter/trixter.rb', line 9

def initialize(port)
  super()

  @port = SerialPort.new(port, 115200, 8, 1)
  @status_thread = nil
  @control_thread = nil
  @current_difficulty = 0
  @saved_difficulty = 0
  @right_brake = false
  @left_brake = false

  @should_run = false
end

Instance Method Details

#applyBrake(pressure) ⇒ Object 



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# File 'lib/trixter/trixter.rb', line 100

def applyBrake(pressure)
  span = Difficulties.size - @saved_difficulty - 1
  units = 100.0/span
  new_difficulty = (pressure/units).to_i + @saved_difficulty
  @current_difficulty = [new_difficulty, Difficulties.size - 1].min
end

#control ⇒ Object 



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# File 'lib/trixter/trixter.rb', line 129

def control
  while @should_run
    sleep 0.01
    @port.write([Difficulties[@current_difficulty]].pack("H*"))
  end
end

#crankPositionChanged(event) ⇒ Object 



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# File 'lib/trixter/trixter.rb', line 107

def crankPositionChanged(event)
  # pass
end

#join ⇒ Object 



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# File 'lib/trixter/trixter.rb', line 136

def join
  if @status_thread != nil
    @status_thread.join
  end
  if @control_thread != nil
    @control_thread.join
  end
end

#leftBrakeChanged(strength) ⇒ Object 



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# File 'lib/trixter/trixter.rb', line 56

def leftBrakeChanged(strength)
  pressure = 240 - strength.hex
  if pressure > 10
    if !@left_brake and !@right_brake
      puts "Left brake engaged"
      @saved_difficulty = @current_difficulty
    end

    @left_brake = true
    applyBrake(pressure)
  else
    if @left_brake
      puts "Left brake disengaged"
      # restore selected difficulty
      @left_brake = false
      if !@right_brake
        @current_difficulty = @saved_difficulty
      end
    end
  end
end

#rightBrakeChanged(strength) ⇒ Object 



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# File 'lib/trixter/trixter.rb', line 78

def rightBrakeChanged(strength)
  pressure = 240 - strength.hex
  if pressure > 10
    if !@left_brake and !@right_brake
      puts "Right brake engaged"
      @saved_difficulty = @current_difficulty
    end

    @right_brake = true
    applyBrake(pressure)
  else
    if @right_brake
      puts "Right brake disengaged"
      # restore selected difficulty
      @right_brake = false
      if !@left_brake
        @current_difficulty = @saved_difficulty
      end
    end
  end
end

#rightGearDown ⇒ Object 



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# File 'lib/trixter/trixter.rb', line 48

def rightGearDown
  @current_difficulty -= 1
  if @current_difficulty < 0
    @current_difficulty = 0
  end
  puts "Decreased difficulty to level #{@current_difficulty}"
end

#rightGearUp ⇒ Object 



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# File 'lib/trixter/trixter.rb', line 40

def rightGearUp
  @current_difficulty += 1
  if @current_difficulty >= Difficulties.size
    @current_difficulty = Difficulties.size - 1
  end
  puts "Increased difficulty to level #{@current_difficulty}"
end

#run ⇒ Object 



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# File 'lib/trixter/trixter.rb', line 23

def run
  return if @should_run or @status_thread != nil
  return if @should_run or @control_thread != nil

  @should_run = true
  @status_thread = Thread.new do
    status
  end
  @control_thread = Thread.new do
    control
  end
end

#status ⇒ Object 



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# File 'lib/trixter/trixter.rb', line 111

def status
  while @should_run
    raw_event = ""
    while true
      raw_event << @port.read(1).strip
      if raw_event.size == 1
        raw_event = "" unless raw_event[0] == '6'
      elsif raw_event.size == 2
        raw_event == "" unless raw_event[1] == 'a'
      elsif raw_event.size > 2
        raw_event == "" unless raw_event[0..1] == '6a'
      end
      break if raw_event.size == 32
    end
    handleEvent(Event.new(raw_event))
  end
end

#stop ⇒ Object 



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# File 'lib/trixter/trixter.rb', line 36

def stop
  @should_run = false
end