class RPiPinOut
Public Class Methods
new(id)
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Calls superclass method
# File lib/rpi_pinout.rb, line 10 def initialize(id) super(id) @id = id unexport() File.write '/sys/class/gpio/export', id File.write "/sys/class/gpio/gpio#{id}/direction", 'out' at_exit { unexport() } end
Protected Instance Methods
set_pin(val)
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Calls superclass method
# File lib/rpi_pinout.rb, line 26 def set_pin(val) super(val) File.write "/sys/class/gpio/gpio#{@id}/value", (val ? 1 : 0) end
Private Instance Methods
unexport()
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to avoid “Device or resource busy @ fptr_finalize - /sys/class/gpio/export” we unexport the pins we used
# File lib/rpi_pinout.rb, line 39 def unexport() return unless File.exists? '/sys/class/gpio/gpio' + @id.to_s File.write "/sys/class/gpio/unexport", @id end