Class: FB::Status

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

Overview

A status register that caches the state of the Arduino into a struct. Also broadcasts changes that can be hooked into via the onchange() event. bot.status # => Returns bot X coordinate.

Constant Summary collapse

DEFAULT_INFO =

Map of informational status and default values for status within Arduino.

{X: 0, Y: 0, Z: 0, S: 10, BUSY: 1, LAST: 'none', PINS: {}}

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Status

Returns a new instance of Status.



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# File 'lib/arduino/status.rb', line 10

def initialize
  @changes = EM::Channel.new
  @info    = OpenStruct.new(DEFAULT_INFO)
end

Instance Method Details

#[](value) ⇒ Object 



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# File 'lib/arduino/status.rb', line 27

def [](value)
  @info[value.to_s.upcase] || :unknown
end

#[]=(register, value) ⇒ Object 



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# File 'lib/arduino/status.rb', line 23

def []=(register, value)
  transaction { @info[register.to_s.upcase] = value }
end

#gcode_update(gcode) ⇒ Object 



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# File 'lib/arduino/status.rb', line 35

def gcode_update(gcode)
  transaction do
    gcode.params.each { |p| @info[p.head] = p.tail }
  end
end

#get_pin(num) ⇒ Object 



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# File 'lib/arduino/status.rb', line 49

def get_pin(num)
  @info.PINS[num] || :unknown
end

#onchange ⇒ Object 



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# File 'lib/arduino/status.rb', line 41

def onchange
  @changes.subscribe { |diff| yield(diff) }
end

#ready? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/arduino/status.rb', line 45

def ready?
  self[:BUSY] == 0
end

#set_parameter(key, val) ⇒ Object 



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# File 'lib/arduino/status.rb', line 58

def set_parameter(key, val)
  transaction do |info|
    info[Gcode::PARAMETER_DICTIONARY.fetch(key,
      "UNKNOWN_PARAMETER_#{key}".to_sym)] = val
  end
end

#set_pin(num, val) ⇒ Object 



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# File 'lib/arduino/status.rb', line 53

def set_pin(num, val)
  val = [true, 1, '1'].include?(val) ? :on : :off
  transaction { |info| info.PINS[num] = val }
end

#to_h ⇒ Object 



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# File 'lib/arduino/status.rb', line 31

def to_h
  @info.to_h
end

#transaction {|@info| ... } ⇒ Object

Yields:

  • (@info) 


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# File 'lib/arduino/status.rb', line 15

def transaction(&blk)
  old = @info.to_h
  yield(@info)
  # Broadcast a diff between the old status and new status
  diff = (@info.to_h.to_a - old.to_a).to_h
  @changes << diff unless diff.empty?
end