Class: TrafficLight

Inherits:
Object
  • Object
show all
Defined in:
lib/traffic_light.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(port = "/dev/tty.usbmodemfd121") ⇒ TrafficLight

Returns a new instance of TrafficLight.



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# File 'lib/traffic_light.rb', line 6

def initialize(port="/dev/tty.usbmodemfd121")
  @port_str = port
  @baud_rate = 9600
  @data_bits = 8
  @stop_bits = 1
  @parity = SerialPort::NONE

  @sp = SerialPort.new(@port_str, @baud_rate, @data_bits, @stop_bits, @parity)
  @sp.read_timeout = 1000

  @opened = true

  clear
end

Instance Attribute Details

#message ⇒ Object (readonly)

Returns the value of attribute message.



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# File 'lib/traffic_light.rb', line 4

def message
  @message
end

Instance Method Details

#all ⇒ Object 



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# File 'lib/traffic_light.rb', line 68

def all
  setColors(7)
end

#clear ⇒ Object 



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

def clear
  setColors(0)
end

#close! ⇒ Object 



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# File 'lib/traffic_light.rb', line 25

def close!
  @sp.close
  @opened = false
end

#green ⇒ Object 



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# File 'lib/traffic_light.rb', line 44

def green
  setColors(1)
end

#green_orange ⇒ Object 



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# File 'lib/traffic_light.rb', line 52

def green_orange
  setColors(3)
end

#green_red ⇒ Object 



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# File 'lib/traffic_light.rb', line 60

def green_red
  setColors(5)
end

#open? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/traffic_light.rb', line 21

def open?
  @opened
end

#orange ⇒ Object 



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

def orange
  setColors(2)
end

#orange_red ⇒ Object 



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# File 'lib/traffic_light.rb', line 64

def orange_red
  setColors(6)
end

#read ⇒ Object 



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# File 'lib/traffic_light.rb', line 30

def read
  @message = @sp.read.chomp
end

#red ⇒ Object 



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

def red
  setColors(4)
end

#setColors(colors) ⇒ Object 



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# File 'lib/traffic_light.rb', line 34

def setColors(colors)
  read
  @sp.write colors
  read
end