class Frankenpins::LED

Attributes

default_duration[RW]

Public Class Methods

new(options={}) click to toggle source
# File lib/frankenpins/led.rb, line 14
def initialize(options={})
  options[:direction] = :out
  @pin = Frankenpins::Pin.new(options)

  @using_pwm = false
  @pwm_max   = 100

  @is_on = false
  @brightness = 0

  # TODO: Should be 0?
  @default_duration = nil

  @queue = TransitionQueue.new
  @queue.start!
end

Public Instance Methods

brightness(value, opts={}) click to toggle source
# File lib/frankenpins/led.rb, line 41
def brightness(value, opts={})

  duration = opts[:duration] || @default_duration

  if value != 100 || value != 0 || duration
    use_pwm!
  end

  props = { :pin => @pin }

  if duration
    props[:type]     = :pwm
    props[:from]     = @brightness
    props[:to]       = value
    props[:duration] = duration
  elsif @using_pwm
    props[:type]  = :pwm
    props[:value] = value
  else
    props[:type]  = :digital
    props[:value] = false if @brightness == 0
    props[:value] = true  if @brightness == 100
  end

  @queue.push(LEDTransition.new(props))
  @brightness = value
end
off(opts={}) click to toggle source
# File lib/frankenpins/led.rb, line 36
def off(opts={})
  brightness(0, opts)
  @is_on = false
end
on(opts={}) click to toggle source
# File lib/frankenpins/led.rb, line 31
def on(opts={})
  brightness(100, opts)
  @is_on = true
end

Private Instance Methods

use_pwm!() click to toggle source
# File lib/frankenpins/led.rb, line 70
def use_pwm!
  if @using_pwm == false
    @pin.io.soft_pwm_create(@pin.wiring_pin, 0, @pwm_max)
    @using_pwm = true
  end
end