1  # SPDX-FileCopyrightText: 2021 Erin St Blaine for Adafruit Industries
  2  #
  3  # SPDX-License-Identifier: MIT
  4  
  5  """
  6  Crystal Chandelier with Circuit Playground BlueFruit
  7  Adafruit invests time and resources providing this open source code.
  8  Please support Adafruit and open source hardware by purchasing
  9  products from Adafruit!
 10  Written by Erin St Blaine & Limor Fried for Adafruit Industries
 11  Copyright (c) 2020-2021 Adafruit Industries
 12  Licensed under the MIT license.
 13  All text above must be included in any redistribution.
 14  """
 15  
 16  # pylint: disable=import-error
 17  # pylint: disable=no-member
 18  import board
 19  import digitalio
 20  import rotaryio
 21  import neopixel
 22  from adafruit_circuitplayground import cp
 23  
 24  from adafruit_led_animation.group import AnimationGroup
 25  from adafruit_led_animation.animation.comet import Comet
 26  from adafruit_led_animation.animation.solid import Solid
 27  from adafruit_led_animation.color import (
 28      BLACK,
 29      PURPLE,
 30  )
 31  
 32  NEOPIXEL_PIN = board.A1 # NeoPixels connected here (crystals + rings)
 33  NUM_PIXELS = 92        # Number of pixels in the crystals and rings
 34  
 35  MIN_BRIGHTNESS = 1   # Minimum LED brightness as a percentage (0 to 100)
 36  MAX_BRIGHTNESS = 25 # Maximum LED brighrness as a percentage (0 to 100)
 37  MIN_FPS = 2         # Minimum animation speed in frames per second (>0)
 38  MAX_FPS = 8        # Maximum animation speed in frames per second (>0)
 39  
 40  # Set initial brightness and speed to center values
 41  BRIGHTNESS = (MIN_BRIGHTNESS + MAX_BRIGHTNESS) // 2
 42  FPS = (MIN_FPS + MAX_FPS) // 2
 43  SPEED = 1 / FPS         # Integer frames-per-second to seconds interval
 44  LEVEL = BRIGHTNESS * 0.01 # Integer brightness percentage to 0.0-1.0 coeff.
 45  
 46  button = digitalio.DigitalInOut(board.A5)
 47  button.direction = digitalio.Direction.INPUT
 48  button.pull = digitalio.Pull.UP
 49  BUTTON_STATE = None
 50  BUTTON_VALUE = None
 51  
 52  PIXELS = neopixel.NeoPixel(NEOPIXEL_PIN, NUM_PIXELS, brightness=LEVEL,
 53                             auto_write=False)
 54  
 55  # NeoPixels off ASAP on startup
 56  cp.pixels.fill(0) # Onboard pixels
 57  cp.pixels.show()
 58  PIXELS.fill(0) # NeoPixel strip
 59  PIXELS.show()
 60  
 61  ENCODER = rotaryio.IncrementalEncoder(board.A2, board.A3)
 62  
 63  # LED ANIMATIONS -----------------------------------------------------------
 64  
 65  COMET = Comet(PIXELS, speed=SPEED, tail_length=8,
 66                color=PURPLE, bounce=True)
 67  CP_COMET = Comet(cp.pixels, speed=SPEED, tail_length=8,
 68                   color=PURPLE, bounce=True)
 69  DARK_RINGS = Solid(PIXELS, color=BLACK)
 70  DARK_CPB = Solid(cp.pixels, color=BLACK)
 71  DARK = AnimationGroup(
 72          DARK_RINGS,
 73          DARK_CPB,
 74          )
 75  
 76  # Animations Playlist, reorder as desired. AnimationGroups play at same time
 77  ANIMATIONS = AnimationGroup(
 78          COMET,
 79          CP_COMET,
 80          )
 81  
 82  
 83  # MAIN LOOP ----------------------------------------------------------------
 84  
 85  LAST_POSITION = ENCODER.position
 86  MODE = 1
 87  while True:
 88  
 89      POSITION = ENCODER.position
 90      if POSITION != LAST_POSITION:
 91          MOVE = POSITION - LAST_POSITION
 92          if cp.switch:
 93  
 94              FPS = max(MIN_FPS, min(FPS + MOVE, MAX_FPS))
 95              SPEED = 1.0 / FPS
 96              COMET.speed = SPEED
 97              print("comet speed = ", SPEED)
 98          else:
 99              BRIGHTNESS = max(MIN_BRIGHTNESS, min(BRIGHTNESS + MOVE,
100                                                   MAX_BRIGHTNESS))
101              LEVEL = BRIGHTNESS * 0.1
102              if LEVEL > 1:
103                  LEVEL = 1
104              cp.pixels.brightness = LEVEL
105              PIXELS.brightness = LEVEL
106              print("brightness = ", LEVEL)
107          LAST_POSITION = POSITION
108      if not BUTTON_VALUE and BUTTON_STATE is None:
109          BUTTON_STATE = "pressed"
110      if BUTTON_VALUE and BUTTON_STATE == "pressed":
111          print("Button pressed.")
112          if MODE == 1:
113              MODE = 2
114          else:
115              MODE = 1
116          BUTTON_STATE = None
117      if MODE == 1:
118          ANIMATIONS.animate()
119      else:
120          DARK.animate()