Class: Omega2Gpio::Gpio

Inherits:
Object
  • Object
show all
Defined in:
lib/omega2_gpio/gpio.rb

Direct Known Subclasses

Input, Output

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(gpio_number) ⇒ Gpio

Returns a new instance of Gpio.



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# File 'lib/omega2_gpio/gpio.rb', line 7

def initialize(gpio_number)
  @gpio_number = gpio_number
  @value = 0

  if Omega2Gpio.configuration.mock and gpio_number.between?(0, Omega2Gpio.configuration.highest_gpio_number)
    Omega2Gpio.messenger.debug "Init Fake-GPIO#{@gpio_number} and mock all interactions as valid"
  else
    set_direction('output')
  end

  self
end

Instance Attribute Details

#gpio_number ⇒ Object (readonly)

Returns the value of attribute gpio_number.



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# File 'lib/omega2_gpio/gpio.rb', line 4

def gpio_number
  @gpio_number
end

#value ⇒ Object (readonly)

Returns the value of attribute value.



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# File 'lib/omega2_gpio/gpio.rb', line 5

def value
  @value
end

Class Method Details

.is_mock? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/omega2_gpio/gpio.rb', line 20

def self.is_mock?
  Omega2Gpio.configuration.mock
end

Instance Method Details

#get ⇒ Object 



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# File 'lib/omega2_gpio/gpio.rb', line 43

def get
  read
end

#is_high? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/omega2_gpio/gpio.rb', line 47

def is_high?
  self.read == 1
end

#is_low? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/omega2_gpio/gpio.rb', line 51

def is_low?
  self.read == 0
end

#read ⇒ Object 



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# File 'lib/omega2_gpio/gpio.rb', line 28

def read
  if Omega2Gpio.configuration.mock
    Omega2Gpio.messenger.debug "Mocked GPIO#{self.gpio_number} value is '#{@value}'"
  else
    stdin, stdout, stderr = Open3.popen3("fast-gpio read #{@gpio_number}")
    if stderr.gets
      raise_error(stderr.gets)
    else
      @value = stdout.gets.to_s.split.last.to_i
    end
  end

  @value
end

#set_direction(direction) ⇒ Object 



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# File 'lib/omega2_gpio/gpio.rb', line 24

def set_direction(direction)
  execute_fast_gpio_command "fast-gpio set-#{direction} #{self.gpio_number}"
end