1  # SPDX-FileCopyrightText: 2021 Kattni Rembor for Adafruit Industries
 2  #
 3  # SPDX-License-Identifier: MIT
 4  
 5  """Rotary Trinkey NeoPixel color picker example"""
 6  import rotaryio
 7  import digitalio
 8  import board
 9  from rainbowio import colorwheel
10  import neopixel
11  
12  print("Rotary Trinkey color picker example")
13  
14  pixel = neopixel.NeoPixel(board.NEOPIXEL, 1, brightness=0.5)
15  encoder = rotaryio.IncrementalEncoder(board.ROTA, board.ROTB)
16  switch = digitalio.DigitalInOut(board.SWITCH)
17  switch.switch_to_input(pull=digitalio.Pull.DOWN)
18  
19  last_position = -1
20  color = 0  # start at red
21  while True:
22      position = encoder.position
23      if last_position is None or position != last_position:
24          print(position)
25          if not switch.value:
26              # change the color
27              if position > last_position:  # increase
28                  color += 1
29              else:
30                  color -= 1
31              color = (color + 256) % 256  # wrap around to 0-256
32              pixel.fill(colorwheel(color))
33          else:
34              # change the brightness
35              if position > last_position:  # increase
36                  pixel.brightness = min(1.0, pixel.brightness + 0.1)
37              else:
38                  pixel.brightness = max(0, pixel.brightness - 0.1)
39      last_position = position