Module: WS2801::Effects

Defined in:
lib/ws2801/effects.rb

Overview

Controller for: RGB Pixel with WS2801 Chip (Effects) build for Diffused Digital RGB LED Pixels from Adafruits on Raspberry Pi but should work on any device and the same led chip © 2013 Roman Pramberger ([email protected])

WS2801 user-space driver (effects)

Class Method Summary collapse

Class Method Details

.pulse(options = {}) ⇒ Object

keep: (Boolean) if pixels get blacked out [default: true]



73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
 
# File 'lib/ws2801/effects.rb', line 73

def self.pulse options = {}
       options[:pixel] = (0..(WS2801.length-1)).to_a if options[:pixel].nil? or options[:pixel] == :all
       options[:pixel] = [options[:pixel]] if options[:pixel].is_a? Numeric
       options[:r] = 0 if options[:r].nil?
       options[:g] = 0 if options[:g].nil?
       options[:b] = 0 if options[:b].nil?
  options[:direction] = :start if options[:direction].nil?
  options[:timeout] = 0.1 if options[:timeout].to_f == 0.0
  options[:keep] = true if options[:keep].nil?   

  WS2801.generate if !options[:keep]
  if options[:direction] == :start
    WS2801.length.times do |i|
      WS2801.generate if !options[:keep]
      WS2801.set({ :r => options[:r], :g => options[:g], :b => options[:b], :pixel => i })
      sleep(options[:timeout])
    end
  elsif options[:direction] == :end
    WS2801.length.times do |i|
      WS2801.generate if !options[:keep]
      WS2801.set({ :r => options[:r], :g => options[:g], :b => options[:b], :pixel => WS2801.length-i })
      sleep(options[:timeout])
    end
  elsif options[:direction] == :inner
    first = WS2801.length/2.0
    if first % 1 != 0
      first = first.to_i + 1
    end
    WS2801.generate if !options[:keep]
           ((WS2801.length/2)+1).times do |i|
      WS2801.generate if !options[:keep]
      WS2801.set({ :pixel => [first-i, first+i], :r => options[:r], :g => options[:g], :b => options[:b] })
      sleep(options[:timeout])
    end
  elsif options[:direction] == :outer
      WS2801.generate if !options[:keep]
    ((WS2801.length/2)+1).times do |i|
      WS2801.generate if !options[:keep]
      WS2801.set({ :pixel => [0+i, WS2801.length-i], :r => options[:r], :g => options[:g], :b => options[:b] })
      sleep(options[:timeout])
    end
  end
end

.stroboscope(options = {}) ⇒ Object

Stroboscope effect

Example:

>> WS2801E.stroboscope({ :timeout => 0.25, :times => 22, :r => 255 })
>> WS2801E.stroboscope({ :b => 255, :g => 255 })

Arguments (or nil):

pixel: (Number-Array|Integer|:all)
r: (Integer) 0-255 red
g: (Integer) 0-255 green
b: (Integer) 0-255 blue
timeout: (Float)
times: (Integer)



26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
 
# File 'lib/ws2801/effects.rb', line 26

def self.stroboscope options = {}
  options[:pixel] = (0..(WS2801.length-1)).to_a if options[:pixel].nil? or options[:pixel] == :all
  options[:pixel] = [options[:pixel]] if options[:pixel].is_a? Numeric
  options[:r] = 0 if options[:r].nil?
  options[:g] = 0 if options[:g].nil?
  options[:b] = 0 if options[:b].nil?
  options[:times] = options[:times].to_i if !options[:times].is_a? Numeric
  options[:times] = 40 if options[:times] == 0
  options[:timeout] = options[:timeout].to_f
  options[:timeout] = 0.03 if options[:timeout] == 0.0

  breakme = 0
  options[:times].times do |c|
    if c % 2 == 0
      r = 0
      g = 0
      b = 0
    else
      r = options[:r]
      g = options[:g]
      b = options[:b]
    end
    WS2801.set({ 
      :pixel => options[:pixel], 
      :r => r,
      :g => g,
      :b => b
    })
    sleep( options[:timeout] )
  end
end