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Port to Ruby #1

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Port to Ruby #1

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39 changes: 39 additions & 0 deletions rotary_encoder.rb
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Original file line number Diff line number Diff line change
@@ -0,0 +1,39 @@
require 'rpi_gpio'

RPi::GPIO.set_numbering :bcm

CLOCK = 17
DATA = 18

RPi::GPIO.setup(CLOCK, as: :input)
RPi::GPIO.setup(DATA, as: :input)

def dtState
RPi::GPIO.high?(DATA) ? 1 : 0
end

def clock_state
RPi::GPIO.high?(CLOCK) ? 1 : 0
end

counter = 0
clock_last_state = clock_state

loop do
if clock_state != clock_last_state
if dtState != clock_state
counter += 1
else
counter -= 1
end

puts counter
end

clock_last_state = clock_state
sleep 0.01
end

at_exit do
RPi::GPIO.clean_up
end