module Apa102Rbpi

Constants

VERSION

Public Class Methods

base() click to toggle source

# File lib/apa102_rbpi.rb, line 15
def self.base
  @base ||= Apa102.new
end

clear_config!() click to toggle source

# File lib/apa102_rbpi.rb, line 19
def self.clear_config!
  @base = nil
  @strip = nil
end

configure() { |base| ... } click to toggle source

# File lib/apa102_rbpi.rb, line 9
def self.configure
  clear_config!
  yield base
  strip.clear!
end

strip() click to toggle source

# File lib/apa102_rbpi.rb, line 24
def self.strip
  @strip ||= Strip.new
end

Public Instance Methods

color_wheel(wheel_pos) click to toggle source

Input a 1-byte value to get a color Colors are from r->g->b->r

# File lib/apa102_rbpi/utils.rb, line 4
def color_wheel(wheel_pos)
  wheel_pos &= 255

  if wheel_pos < 85
    rgb_to_hex(255 - wheel_pos * 3, wheel_pos * 3, 0)
  elsif wheel_pos < 170
    wheel_pos -= 85
    rgb_to_hex(0, 255 - wheel_pos * 3, wheel_pos * 3)
  else
    wheel_pos -= 170
    rgb_to_hex(wheel_pos * 3, 0, 255 - wheel_pos * 3)
  end
end

hex_to_rgb(hex) click to toggle source

convert 3-byte hex color to [red, green, blue]

# File lib/apa102_rbpi/utils.rb, line 24
def hex_to_rgb(hex)
  [
    (hex & 0xFF0000) >> 16,
    (hex & 0x00FF00) >> 8,
    (hex & 0x0000FF)
  ]
end

rgb_to_hex(red, green, blue) click to toggle source

convert to a 3-byte hex color value

# File lib/apa102_rbpi/utils.rb, line 19
def rgb_to_hex(red, green, blue)
  (red << 16) + (green << 8) + blue
end