Class: PaPiRus::Display

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

Overview

The Display can be use to send image data to the epd fuse driver

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(epd_path: '/dev/epd', width: 200, height: 96, panel: 'EPD 2.0', cog: 0, film: 0, auto: false, inverse: false, rotation: 0) ⇒ Display

Returns a new instance of Display.



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# File 'lib/papirus.rb', line 8

def initialize(epd_path: '/dev/epd', width: 200, height: 96, panel: 'EPD 2.0', cog: 0, film: 0, auto: false, inverse: false, rotation: 0)
    #transver all vars to attr's
    method(__method__).parameters.each do |type, k|
        next unless type == :key
        v = eval(k.to_s)
        instance_variable_set("@#{k}", v) unless v.nil?
    end
    @allowed_commands = ['F', 'P', 'U', 'C']
    get_display_info_from_edp
end

Instance Attribute Details

#allowed_commands ⇒ Object (readonly)

Returns the value of attribute allowed_commands.



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# File 'lib/papirus.rb', line 5

def allowed_commands
  @allowed_commands
end

#auto ⇒ Object (readonly)

Returns the value of attribute auto.



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# File 'lib/papirus.rb', line 5

def auto
  @auto
end

#cog ⇒ Object (readonly)

Returns the value of attribute cog.



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# File 'lib/papirus.rb', line 5

def cog
  @cog
end

#display_path ⇒ Object (readonly)

Returns the value of attribute display_path.



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# File 'lib/papirus.rb', line 5

def display_path
  @display_path
end

#epd_path ⇒ Object (readonly)

Returns the value of attribute epd_path.



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# File 'lib/papirus.rb', line 5

def epd_path
  @epd_path
end

#film ⇒ Object (readonly)

Returns the value of attribute film.



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# File 'lib/papirus.rb', line 5

def film
  @film
end

#height ⇒ Object (readonly)

Returns the value of attribute height.



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# File 'lib/papirus.rb', line 5

def height
  @height
end

#image ⇒ Object

Returns the value of attribute image.



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

def image
  @image
end

#inverse ⇒ Object

Returns the value of attribute inverse.



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

def inverse
  @inverse
end

#panel ⇒ Object (readonly)

Returns the value of attribute panel.



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# File 'lib/papirus.rb', line 5

def panel
  @panel
end

#rotation ⇒ Object

Returns the value of attribute rotation.



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

def rotation
  @rotation
end

#width ⇒ Object (readonly)

Returns the value of attribute width.



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# File 'lib/papirus.rb', line 5

def width
  @width
end

Instance Method Details

#clear ⇒ Object 



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# File 'lib/papirus.rb', line 41

def clear()
    command('C')
end

#command(c) ⇒ Object 



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# File 'lib/papirus.rb', line 45

def command(c)
    raise "command #{c} does not exist" unless @allowed_commands.include?(c)
    File.open(File.join(@epd_path, "command"), "wb") do |io|
        io.write(c)
    end
end

#fast_update ⇒ Object 



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# File 'lib/papirus.rb', line 29

def fast_update()
    command('F')
end

#partial_update ⇒ Object 



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# File 'lib/papirus.rb', line 33

def partial_update()
    command('P')
end

#show(*args) ⇒ Object 



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# File 'lib/papirus.rb', line 19

def show(*args)
    raise 'you need to al least provide raw imagedata' if args.length == 0
    data = args[0]
    updatemethod = args[1] || 'U'
    File.open(File.join(@epd_path, "LE", "display#{@inverse ? '_inverse': ''}"), 'wb') do |io|
        io.write data
    end
    command(@allowed_commands.include?(updatemethod) ? updatemethod : 'U')
end

#update ⇒ Object 



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

def update()
    command('U')
end