Class: GPIO::Pin

Inherits:
Object
  • Object
show all
Includes:
Concurrent::Async
Defined in:
lib/ruby-gpio.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, number) ⇒ Pin

Returns a new instance of Pin.



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# File 'lib/ruby-gpio.rb', line 17

def initialize(name, number)
  init_mutex
  @name = name
  @number = number
end

Instance Attribute Details

#direction ⇒ Object

Returns the value of attribute direction.



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# File 'lib/ruby-gpio.rb', line 15

def direction
  @direction
end

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/ruby-gpio.rb', line 15

def name
  @name
end

#number ⇒ Object

Returns the value of attribute number.



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# File 'lib/ruby-gpio.rb', line 15

def number
  @number
end

Instance Method Details

#as(dir = :out) ⇒ Object

set input or output gpio_num is the GPIO pin number, dir is the direction - either :out or :in



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# File 'lib/ruby-gpio.rb', line 25

def as(dir=:out)
  @direction = dir.to_s
  GPIO.write "gpio#{@number}/direction", @direction
end

#off ⇒ Object

send a low value to the pin



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# File 'lib/ruby-gpio.rb', line 36

def off
  GPIO.write "gpio#{@number}/value", "0"
end

#on ⇒ Object

send a high value to the pin



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# File 'lib/ruby-gpio.rb', line 31

def on
  GPIO.write "gpio#{@number}/value", "1"
end

#pwm(value) ⇒ Object

send a PWM (pulse width modulation) signal to the pin



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# File 'lib/ruby-gpio.rb', line 41

def pwm(value)
  GPIO.write "gpio#{@number}/value", value
end

#read ⇒ Object

read from the pin



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# File 'lib/ruby-gpio.rb', line 46

def read
  GPIO.read @number
end

#watch_for(value, &block) ⇒ Object

watch the pin for change and trigger the block over and over again



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# File 'lib/ruby-gpio.rb', line 62

def watch_for(value, &block)
  while true        
    if read == value
      GPIO.instance_eval &block
    end
  end
end

#watch_once_for(value, &block) ⇒ Object

watch the pin for change and trigger the block once



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# File 'lib/ruby-gpio.rb', line 51

def watch_once_for(value, &block)
  watching = true
  while watching        
    if read == value
      GPIO.instance_eval &block
      watching = false
    end
  end
end