Class: BlinkStick

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

Constant Summary collapse

@@VENDOR_ID = 
0X20A0
@@PRODUCT_ID = 
0x41E5

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.find_all ⇒ Object 



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# File 'lib/blinkstick.rb', line 22

def self.find_all
  @@usb ||= LIBUSB::Context.new

  result = []

  @@usb.devices(:idVendor => @@VENDOR_ID, :idProduct => @@PRODUCT_ID).each { | device |
    b = BlinkStick.new
    b.open(device)

    result.push(b)
  }

  result
end

.find_by_serial(serial) ⇒ Object 



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# File 'lib/blinkstick.rb', line 37

def self.find_by_serial(serial)
  @@usb ||= LIBUSB::Context.new

  @@usb.devices(:idVendor => @@VENDOR_ID, :idProduct => @@PRODUCT_ID).each { | device |
    if device.serial_number == serial
      b = BlinkStick.new
      b.open(device)
      return b
    end
  }

  nil
end

Instance Method Details

#color ⇒ Object 



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# File 'lib/blinkstick.rb', line 55

def color
  result = @handle.control_transfer(:bmRequestType => 0x80 | 0x20, :bRequest => 0x1, :wValue => 0x1, :wIndex => 0x0000, :dataIn => 4)
  Color::RGB.new(result[1].ord, result[2].ord, result[3].ord)
end

#color=(value) ⇒ Object 



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# File 'lib/blinkstick.rb', line 51

def color=(value)
  @handle.control_transfer(:bmRequestType => 0x20, :bRequest => 0x9, :wValue => 0x1, :wIndex => 0x0000, :dataOut => 1.chr + value.red.to_i.chr + value.green.to_i.chr + value.blue.to_i.chr)
end

#description ⇒ Object 



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# File 'lib/blinkstick.rb', line 167

def description
  @device.product
end

#get_info_block(id) ⇒ Object 



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# File 'lib/blinkstick.rb', line 134

def get_info_block(id)
  bytes = @handle.control_transfer(:bmRequestType => 0x80 | 0x20, :bRequest => 0x1, :wValue => id + 1, :wIndex => 0x0000, :dataIn => 33)

  result = ""
  for i in 1..(bytes.length-1)
    if i == "\x00"
      break
    end
    result += bytes[i]
  end

  result
end

#info_block1 ⇒ Object 



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# File 'lib/blinkstick.rb', line 171

def info_block1
  get_info_block(1)
end

#info_block1=(value) ⇒ Object 



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# File 'lib/blinkstick.rb', line 175

def info_block1=(value)
  set_info_block(1, value)
end

#info_block2 ⇒ Object 



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# File 'lib/blinkstick.rb', line 179

def info_block2
  get_info_block(2)
end

#info_block2=(value) ⇒ Object 



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# File 'lib/blinkstick.rb', line 183

def info_block2=(value)
  set_info_block(2, value)
end

#manufacturer ⇒ Object 



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# File 'lib/blinkstick.rb', line 163

def manufacturer
  @device.manufacturer
end

#off ⇒ Object 



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# File 'lib/blinkstick.rb', line 130

def off
  self.color = Color::RGB.new(0, 0, 0)
end

#open(device = nil) ⇒ Object 



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# File 'lib/blinkstick.rb', line 10

def open(device = nil)
  @@usb ||= LIBUSB::Context.new

  if (device)
    @device = device
  else
    @device = @@usb.devices(:idVendor => @@VENDOR_ID, :idProduct => @@PRODUCT_ID).first
  end

  @handle = @device.open
end

#random_color ⇒ Object 



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# File 'lib/blinkstick.rb', line 154

def random_color
  r = Random.new
  self.color = Color::RGB.new(r.rand(255), r.rand(255), r.rand(255))
end

#serial ⇒ Object 



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# File 'lib/blinkstick.rb', line 159

def serial
  @device.serial_number
end

#set_color(channel, index, value) ⇒ Object 



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

def set_color(channel, index, value)
  attempts = 0
  while attempts < 5
    attempts += 1

    begin
      @handle.control_transfer(:bmRequestType => 0x20,
                               :bRequest => 0x9,
                               :wValue => 0x5,
                               :wIndex => 0x0000,
                               :dataOut => 1.chr + channel.to_i.chr + index.to_i.chr + value.red.to_i.chr + value.green.to_i.chr + value.blue.to_i.chr)
      break
    rescue
      if attempts == 5
        raise
      end
    end
  end
end

#set_colors(channel, data) ⇒ Object 



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# File 'lib/blinkstick.rb', line 80

def set_colors(channel, data)
  report_id = 9
  max_leds = 64

  if data.size <= 8 * 3
      max_leds = 8
      report_id = 6
  elsif data.size <= 16 * 3
      max_leds = 16
      report_id = 7
  elsif data.size <= 32 * 3
      max_leds = 32
      report_id = 8
  elsif data.size <= 64 * 3
      max_leds = 64
      report_id = 9
  end

  report = report_id.chr + channel.to_i.chr

  (0..max_leds * 3 - 1).each do | i |
    if data.size > i
      report += data[i].to_i.chr
    else
      report += 0.chr
    end
  end

  #Debug code
  #puts report.unpack('U'*report.length).collect {|x| x.to_s 16}.join(" ")

  attempts = 0
  while attempts < 5
    attempts += 1

    begin
      @handle.control_transfer(:bmRequestType => 0x20,
                               :bRequest => 0x9,
                               :wValue => report_id,
                               :wIndex => 0,
                               :dataOut => report)
      break
    rescue
      if attempts == 5
        raise
      end
    end
  end
end

#set_info_block(id, data) ⇒ Object 



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# File 'lib/blinkstick.rb', line 148

def set_info_block(id, data)
  data = (id + 1).chr + data
  data = data + 0.chr while data.length < 33
  @handle.control_transfer(:bmRequestType => 0x20, :bRequest => 0x9, :wValue => id + 1, :wIndex => 0x0000, :dataOut => data)
end