Merge pull request #94 from tekktrik/doc/add-pause-example

Add push button examples for pausing, resuming, and cycling animations

Author: ladyada

examples/led_animation_cycle_animations.py

@@ -0,0 +1,44 @@
+# SPDX-FileCopyrightText: 2021 Alec Delaney
+# SPDX-License-Identifier: MIT
+
+"""
+This example uses AnimationsSequence along with a connected push button to cycle through
+two animations
+
+For NeoPixel FeatherWing. Update pixel_pin and pixel_num to match your wiring if using
+a different form of NeoPixels.
+"""
+import time
+import board
+import neopixel
+from digitalio import DigitalInOut, Direction, Pull
+
+from adafruit_led_animation.animation.solid import Solid
+from adafruit_led_animation.sequence import AnimationSequence
+from adafruit_led_animation.color import RED, BLUE
+
+# Update to match the pin connected to your NeoPixels
+pixel_pin = board.D6
+# Update to match the number of NeoPixels you have connected
+pixel_num = 32
+
+# Update to matchpin connected to button that connect logic high when pushed
+button_pin = board.D3
+
+pixels = neopixel.NeoPixel(pixel_pin, pixel_num, brightness=0.5, auto_write=False)
+button = DigitalInOut(button_pin)
+button.direction = Direction.INPUT
+button.pull = Pull.UP
+
+solid_blue = Solid(pixels, color=BLUE)
+solid_red = Solid(pixels, color=RED)
+animation_sequence = AnimationSequence(solid_blue, solid_red, auto_clear=True)
+
+while True:
+    animation_sequence.animate()
+
+    # Pressing the button pauses the animation permanently
+    if not button.value:
+        animation_sequence.next()
+        while button.value:
+            time.sleep(0.1)  # Used for button debouncing

examples/led_animation_freeze_animation.py

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+# SPDX-FileCopyrightText: 2021 Alec Delaney
+# SPDX-License-Identifier: MIT
+
+"""
+This example uses Pulse animation along with a connected push button to freeze
+the animation permanently when pressed
+
+For NeoPixel FeatherWing. Update pixel_pin and pixel_num to match your wiring if using
+a different form of NeoPixels.
+"""
+import board
+import neopixel
+from digitalio import DigitalInOut, Direction, Pull
+
+from adafruit_led_animation.animation.pulse import Pulse
+from adafruit_led_animation.color import RED
+
+# Update to match the pin connected to your NeoPixels
+pixel_pin = board.D6
+# Update to match the number of NeoPixels you have connected
+pixel_num = 32
+
+# Update to matchpin connected to button that connect logic high when pushed
+button_pin = board.D3
+
+pixels = neopixel.NeoPixel(pixel_pin, pixel_num, brightness=0.5, auto_write=False)
+button = DigitalInOut(button_pin)
+button.direction = Direction.INPUT
+button.pull = Pull.UP
+
+pulse_animation = Pulse(pixels, speed=0.1, period=1, color=RED)
+
+while True:
+    pulse_animation.animate()
+
+    # Pressing the button pauses the animation permanently
+    if not button.value:
+        pulse_animation.freeze()

examples/led_animation_resume_animation.py

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+# SPDX-FileCopyrightText: 2021 Alec Delaney
+# SPDX-License-Identifier: MIT
+
+"""
+This example uses Pulse animation along with a connected push button to start
+the animation when pressed
+
+For NeoPixel FeatherWing. Update pixel_pin and pixel_num to match your wiring if using
+a different form of NeoPixels.
+"""
+import board
+import neopixel
+from digitalio import DigitalInOut, Direction, Pull
+
+from adafruit_led_animation.animation.pulse import Pulse
+from adafruit_led_animation.color import RED
+
+# Update to match the pin connected to your NeoPixels
+pixel_pin = board.D6
+# Update to match the number of NeoPixels you have connected
+pixel_num = 32
+
+# Update to matchpin connected to button that connect logic high when pushed
+button_pin = board.D3
+
+pixels = neopixel.NeoPixel(pixel_pin, pixel_num, brightness=0.5, auto_write=False)
+button = DigitalInOut(button_pin)
+button.direction = Direction.INPUT
+button.pull = Pull.UP
+
+# Create the animation and freeze it afterwards
+pulse_animation = Pulse(pixels, speed=0.1, period=1, color=RED)
+pulse_animation.freeze()
+
+while True:
+    pulse_animation.animate()
+
+    # Pressing the button resumes (or in this case starts) the animation permanently
+    if not button.value:
+        pulse_animation.resume()