49 lines
1.5 KiB
Python
49 lines
1.5 KiB
Python
# SPDX-FileCopyrightText: 2017 John Park for Adafruit Industries
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#
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# SPDX-License-Identifier: MIT
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"""
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UFO Flying Saucer with Circuit Playground Express
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https://learn.adafruit.com/ufo-circuit-playground-express/
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Plays UFO lights and sounds if the board is upside down only,
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Tilt to change light color, cycle speed, tone pitch
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"""
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import time
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from adafruit_circuitplayground.express import cpx
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def simple_circle(wait, red, green, blue):
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"""timing, color values per channel"""
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baseFreq = int(20 + (green * 0.3)) # tone value derived from rotation
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for i in range(10):
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cpx.pixels[i] = ((0, 0, 0))
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cpx.start_tone(baseFreq + i) # increasing pitch sweep
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time.sleep(wait)
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for i in range(10):
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cpx.pixels[i] = ((red, green, blue))
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time.sleep(wait)
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# Main loop gets x, y and z axis acceleration, prints the values, and turns on
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# lights if the UFO is upside down, plays tones
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while True:
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R = 0
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G = 0
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B = 0
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x, y, z = cpx.acceleration # read the accelerometer values
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R = 10 * (R + abs(int(x))) # scale up the accel values into color values
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G = 10 * (G + abs(int(y)))
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B = 10 * (B + abs(int(z)))
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# check for upside down state on z axis
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if z < 0: # any negative number on z axis means it's upside down enough
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speed = (0.01 * (B * 0.025))
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simple_circle(speed, R, G, B) # speed based on tilt, .01 is good start
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else: # right side up means no colors or sound!
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cpx.pixels.fill((0, 0, 0))
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cpx.stop_tone()
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