python/rotor-test2.py

   1 from RPi import GPIO
   2 from time import sleep
   3
   4 clk = 23
   5 dt = 24
   6 sw = 27
   7
   8 GPIO.setmode(GPIO.BCM)
   9 GPIO.setup(clk, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
  10 GPIO.setup(dt, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
  11 GPIO.setup(sw, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
  12
  13 counter = 0
  14 clkLastState = GPIO.input(clk)
  15 swLastState = GPIO.input(sw)
  16
  17 try:
  18
  19         while True:
  20                 clkState = GPIO.input(clk)
  21                 dtState = GPIO.input(dt)
  22                 swState = GPIO.input(sw)
  23                 if clkState != clkLastState:
  24                         if dtState != clkState:
  25                                 counter += 1
  26                         else:
  27                                 counter -= 1
  28                         print counter
  29                 clkLastState = clkState
  30                 if swState != swLastState:
  31                         print "Pushed"
  32                 swLastState = swState
  33                 sleep(0.01)
  34 finally:
  35         GPIO.cleanup()