Class: BeagleBoard::FreeBSD::Gpio

Inherits:
Base::Gpio show all
Extended by:
FFI::Library
Defined in:
lib/beagleboard/freebsd/gpio.rb

Constant Summary collapse

GPIO_PIN_LOW = 
0x00
GPIO_PIN_HIGH = 
0x01
GPIO_PIN_INPUT = 
0x001
GPIO_PIN_OUTPUT = 
0x002
GPIO_PIN_OPENDRAIN = 
0x004
GPIO_PIN_PUSHPULL = 
0x008
GPIO_PIN_TRISTATE = 
0x010
GPIO_PIN_PULLUP = 
0x020
GPIO_PIN_PULLDOWN = 
0x040
GPIO_PIN_INVIN = 
0x080
GPIO_PIN_INVOUT = 
0x100
GPIO_VALUE_INVALID = 
-1
GPIO_VALUE_LOW = 
GPIO_PIN_LOW
GPIO_VALUE_HIGH = 
GPIO_PIN_HIGH

Instance Method Summary collapse

Constructor Details

#initialize(bank, gpio) ⇒ Gpio

Returns a new instance of Gpio.



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# File 'lib/beagleboard/freebsd/gpio.rb', line 50

def initialize(bank, gpio)
  super
end

Instance Method Details

#close ⇒ Object 



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# File 'lib/beagleboard/freebsd/gpio.rb', line 58

def close
  gpio_close(@bank_fd)
end

#direction ⇒ Object 



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# File 'lib/beagleboard/freebsd/gpio.rb', line 66

def direction
  case gpio_pin_config(@bank_fd, @gpio)
  when GPIO_PIN_INPUT then :in
  when GPIO_PIN_OUTPUT then :out
  end
end

#direction=(direction) ⇒ Object 



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# File 'lib/beagleboard/freebsd/gpio.rb', line 73

def direction=(direction)
  send(direction_function(direction), @bank_fd, @gpio)
  self.value = direction_value(direction)
end

#open ⇒ Object 



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# File 'lib/beagleboard/freebsd/gpio.rb', line 54

def open
  @bank_fd = gpio_open(@bank)
end

#toggle ⇒ Object 



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# File 'lib/beagleboard/freebsd/gpio.rb', line 62

def toggle
  gpio_pin_toggle(@bank_fd, @gpio)
end

#value ⇒ Object 



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# File 'lib/beagleboard/freebsd/gpio.rb', line 78

def value
  res = Gpio.gpio_pin_get(@bank_fd, @gpio)

  raise 'Read error' if res < 0

  res
end

#value=(value) ⇒ Object

Raises:

  • (StandardError) 


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# File 'lib/beagleboard/freebsd/gpio.rb', line 86

def value=(value)
  return unless value
  res = send(value_function(value), @bank_fd, @gpio)
  raise StandardError, 'Write error' if res < 0
end