xmas_tree/example_3.py

   1 import tree
   2
   3 # Some constants to identify each LED
   4 L0 = 1
   5 L1 = 2
   6 L2 = 4
   7 L3 = 8
   8 L4 = 16
   9 L5 = 32
  10 L6 = 64
  11 ALL = 1+2+4+8+16+32+64
  12 NO_LEDS = 0
  13
  14 tree.setup() # you must always call setup() first!
  15
  16 # Pattern: all LEDs illuminated except for one each time
  17
  18 for i in range(3): # repeat 3 times
  19   tree.leds_on_and_wait(ALL-L0, 0.5) # all on except for LED 0
  20   tree.leds_on_and_wait(ALL-L1, 0.5) # all on except for LED 1
  21   tree.leds_on_and_wait(ALL-L2, 0.5) # etc.
  22   tree.leds_on_and_wait(ALL-L3, 0.5)
  23   tree.leds_on_and_wait(ALL-L4, 0.5)
  24   tree.leds_on_and_wait(ALL-L5, 0.5)
  25   tree.leds_on_and_wait(ALL-L6, 0.5)
  26
  27
  28 tree.all_leds_off() # extinguish all LEDs
  29
  30 # All done!
  31 tree.cleanup() # call cleanup() at the end
  32