simplified code

adding a simplified version

NeoPixel_Crystal_Chandelier/code_simple.py

@@ -0,0 +1,116 @@
+"""
+Crystal Chandelier with Circuit Playground BlueFruit
+Adafruit invests time and resources providing this open source code.
+Please support Adafruit and open source hardware by purchasing
+products from Adafruit!
+Written by Erin St Blaine & Limor Fried for Adafruit Industries
+Copyright (c) 2020-2021 Adafruit Industries
+Licensed under the MIT license.
+All text above must be included in any redistribution.
+"""
+
+# pylint: disable=import-error
+# pylint: disable=no-member
+import board
+import digitalio
+import rotaryio
+import neopixel
+from adafruit_circuitplayground import cp
+
+from adafruit_led_animation.group import AnimationGroup
+from adafruit_led_animation.animation.comet import Comet
+from adafruit_led_animation.animation.solid import Solid
+from adafruit_led_animation.color import (
+    BLACK,
+    PURPLE,
+)
+
+NEOPIXEL_PIN = board.A1 # NeoPixels connected here (crystals + rings)
+NUM_PIXELS = 92        # Number of pixels in the crystals and rings
+
+MIN_BRIGHTNESS = 1   # Minimum LED brightness as a percentage (0 to 100)
+MAX_BRIGHTNESS = 25 # Maximum LED brighrness as a percentage (0 to 100)
+MIN_FPS = 2         # Minimum animation speed in frames per second (>0)
+MAX_FPS = 8        # Maximum animation speed in frames per second (>0)
+
+# Set initial brightness and speed to center values
+BRIGHTNESS = (MIN_BRIGHTNESS + MAX_BRIGHTNESS) // 2
+FPS = (MIN_FPS + MAX_FPS) // 2
+SPEED = 1 / FPS         # Integer frames-per-second to seconds interval
+LEVEL = BRIGHTNESS * 0.01 # Integer brightness percentage to 0.0-1.0 coeff.
+
+button = digitalio.DigitalInOut(board.A5)
+button.direction = digitalio.Direction.INPUT
+button.pull = digitalio.Pull.UP
+BUTTON_STATE = None
+BUTTON_VALUE = None
+
+PIXELS = neopixel.NeoPixel(NEOPIXEL_PIN, NUM_PIXELS, brightness=LEVEL,
+                           auto_write=False)
+
+# NeoPixels off ASAP on startup
+cp.pixels.fill(0) # Onboard pixels
+cp.pixels.show()
+PIXELS.fill(0) # NeoPixel strip
+PIXELS.show()
+
+ENCODER = rotaryio.IncrementalEncoder(board.A2, board.A3)
+
+# LED ANIMATIONS -----------------------------------------------------------
+
+COMET = Comet(PIXELS, speed=SPEED, tail_length=8,
+              color=PURPLE, bounce=True)
+CP_COMET = Comet(cp.pixels, speed=SPEED, tail_length=8,
+                 color=PURPLE, bounce=True)
+DARK_RINGS = Solid(PIXELS, color=BLACK)
+DARK_CPB = Solid(cp.pixels, color=BLACK)
+DARK = AnimationGroup(
+        DARK_RINGS,
+        DARK_CPB,
+        )
+
+# Animations Playlist, reorder as desired. AnimationGroups play at same time
+ANIMATIONS = AnimationGroup(
+        COMET,
+        CP_COMET,
+        )
+
+
+# MAIN LOOP ----------------------------------------------------------------
+
+LAST_POSITION = ENCODER.position
+MODE = 1
+while True:
+
+    POSITION = ENCODER.position
+    if POSITION != LAST_POSITION:
+        MOVE = POSITION - LAST_POSITION
+        if cp.switch:
+
+            FPS = max(MIN_FPS, min(FPS + MOVE, MAX_FPS))
+            SPEED = 1.0 / FPS
+            COMET.speed = SPEED
+            print("comet speed = ", SPEED)
+        else:
+            BRIGHTNESS = max(MIN_BRIGHTNESS, min(BRIGHTNESS + MOVE,
+                                                 MAX_BRIGHTNESS))
+            LEVEL = BRIGHTNESS * 0.1
+            if LEVEL > 1:
+                LEVEL = 1
+            cp.pixels.brightness = LEVEL
+            PIXELS.brightness = LEVEL
+            print("brightness = ", LEVEL)
+        LAST_POSITION = POSITION
+    if not BUTTON_VALUE and BUTTON_STATE is None:
+        BUTTON_STATE = "pressed"
+    if BUTTON_VALUE and BUTTON_STATE == "pressed":
+        print("Button pressed.")
+        if MODE == 1:
+            MODE = 2
+        else:
+            MODE = 1
+        BUTTON_STATE = None
+    if MODE == 1:
+        ANIMATIONS.animate()
+    else:
+        DARK.animate()