demoRGB.py

   1 import machine, neopixel, time
   2 np=neopixel.NeoPixel(machine.Pin(0), 96)
   3
   4 def demo(np):
   5     n = np.n
   6
   7     # cycle
   8     for i in range(4 * n):
   9         for j in range(n):
  10             np[j] = (0, 0, 0)
  11         np[i % n] = (255, 255, 255)
  12         np.write()
  13         time.sleep_ms(25)
  14
  15     # bounce
  16     for i in range(4 * n):
  17         for j in range(n):
  18             np[j] = (0, 128, 128)
  19         if (i // n) % 2 == 0:
  20             np[i % n] = (0, 0, 0)
  21         else:
  22             np[n - 1 - (i % n)] = (0, 0, 0)
  23         np.write()
  24         time.sleep_ms(60)
  25
  26     # fade in/out
  27     for i in range(0, 4 * 256, 8):
  28         for j in range(n):
  29             if (i // 256) % 2 == 0:
  30                 val = i & 0xff
  31             else:
  32                 val = 255 - (i & 0xff)
  33             np[j] = (val, 0, 0)
  34         np.write()
  35
  36     # clear
  37     for i in range(n):
  38         np[i] = (0, 0, 0)
  39     np.write()
  40
  41
  42 while True:
  43     demo(np)