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test.py
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test.py
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# NeoPixel library strandtest example
# Author: Tony DiCola ([email protected])
#
# Direct port of the Arduino NeoPixel library strandtest example. Showcases
# various animations on a strip of NeoPixels.
import time
from neopixel import *
# LED strip configuration:
LED_COUNT = 60 # Number of LED pixels.
LED_PIN = 18 # GPIO pin connected to the pixels (must support PWM!).
LED_FREQ_HZ = 800000 # LED signal frequency in hertz (usually 800khz)
LED_DMA = 5 # DMA channel to use for generating signal (try 5)
LED_BRIGHTNESS = 255 # Set to 0 for darkest and 255 for brightest
LED_INVERT = False # True to invert the signal (when using NPN transistor level shift)
# Define functions which animate LEDs in various ways.
def colorOnePixel(strip, color):
for i in range(0,strip.numPixels()): # all pixel
strip.setPixelColor(i, color) # set pixel i to color
# for j in range(i-1, 0,-1): # set all pixel behind pixel i to color zero
strip.setPixelColor(i-1,0)
strip.show()
time.sleep(0.05)
strip.setPixelColor(strip.numPixels()-1, 0)
def colorTwoPixel(strip, color):
for i in range(1, strip.numPixels()):
strip.setPixelColor(i, color)
strip.setPixelColor(i-1, color)
strip.setPixelColor(i-2, Color(255,0,0))
strip.show()
time.sleep(0.05)
strip.setPixelColor(strip.numPixels()-1, Color(255,0,0))
strip.setPixelColor(strip.numPixels()-2, Color(255,0,0))
def colorTwoPixelTwoColors(strip, color, color2):
for i in range(1, strip.numPixels()):
strip.setPixelColor(i, color)
strip.setPixelColor(i-1, color)
strip.setPixelColor(i-2, color2)
strip.show()
time.sleep(0.05)
strip.setPixelColor(strip.numPixels()-1, color2)
strip.setPixelColor(strip.numPixels()-2, color2)
def colorThreePixel(strip, color):
for i in range(3, strip.numPixels()):
strip.setPixelColor(i, color)
strip.setPixelColor(i-1, color)
strip.setPixelColor(i-2, color)
strip.setPixelColor(i-3, 0) # set the pixel behind again to black
strip.show()
time.sleep(0.05)
strip.setPixelColor(strip.numPixels()-1, 0)
strip.setPixelColor(strip.numPixels()-2, 0)
strip.setPixelColor(strip.numPixels()-3, 0)
def colorLampTwoColors(strip, color, color2, numPixel):
for i in range(numPixel-1, strip.numPixels()):
strip.setPixelColor(i, color)
for j in range(i-1, i-numPixel, -1):
strip.setPixelColor(j, color)
strip.setPixelColor(i-numPixel, color2)
strip.show()
time.sleep(0.0125)
for k in range(strip.numPixels()-numPixel-1, strip.numPixels()):
strip.setPixelColor(k, color2)
strip.setPixelColor((strip.numPixels()-k-numPixel)*-1, color)
strip.show()
time.sleep(0.0125)
# for l in range(0, numPixel):
# strip.setPixelColor(l, color)
# strip.show()
# time.sleep(0.015)
def colorLampOneColor(strip, color, numPixel):
for i in range(numPixel-1, strip.numPixels()):
strip.setPixelColor(i, color)
for j in range(i-1, i-numPixel, -1):
strip.setPixelColor(j, color)
strip.setPixelColor(i-numPixel, Color(255,255,255))
strip.show()
time.sleep(0.115)
for k in range(strip.numPixels(), strip.numPixels()-numPixel-1, -1):
strip.setPixelColor(k, Color(255,255,255))
def colorHalfHalf(strip, color1, color2):
"""Wipe color across display a pixel at a time."""
for i in range(strip.numPixels()/2):
strip.setPixelColor(i, color1)
strip.show()
for j in range(strip.numPixels()/2,strip.numPixels()):
strip.setPixelColor(j,color2)
strip.show()
def colorWipe(strip, color, wait_ms=50):
"""Wipe color across display a pixel at a time."""
for i in range(strip.numPixels()):
strip.setPixelColor(i, color)
strip.show()
# time.sleep(wait_ms/1000.0)
def theaterChase(strip, color, wait_ms=500, iterations=1):
"""Movie theater light style chaser animation."""
for j in range(iterations):
for q in range(3):
for i in range(0, strip.numPixels(), 3):
strip.setPixelColor(i+q, color)
strip.show()
time.sleep(wait_ms/1000.0)
for i in range(0, strip.numPixels(), 3):
strip.setPixelColor(i+q, 0)
def wheel(pos):
"""Generate rainbow colors across 0-255 positions."""
if pos < 85:
return Color(pos * 3, 255 - pos * 3, 0)
elif pos < 170:
pos -= 85
return Color(255 - pos * 3, 0, pos * 3)
else:
pos -= 170
return Color(0, pos * 3, 255 - pos * 3)
def rainbow(strip, wait_ms=20, iterations=1):
"""Draw rainbow that fades across all pixels at once."""
for j in range(256*iterations):
for i in range(strip.numPixels()):
strip.setPixelColor(i, wheel((i+j) & 255))
strip.show()
time.sleep(wait_ms/1000.0)
def rainbowCycle(strip, wait_ms=20, iterations=5):
"""Draw rainbow that uniformly distributes itself across all pixels."""
for j in range(256*iterations):
for i in range(strip.numPixels()):
strip.setPixelColor(i, wheel((int(i * 256 / strip.numPixels()) + j) & 255))
strip.show()
time.sleep(wait_ms/1000.0)
def theaterChaseRainbow(strip, wait_ms=50):
"""Rainbow movie theater light style chaser animation."""
for j in range(256):
for q in range(3):
for i in range(0, strip.numPixels(), 3):
strip.setPixelColor(i+q, wheel((i+j) % 255))
strip.show()
time.sleep(wait_ms/1000.0)
for i in range(0, strip.numPixels(), 3):
strip.setPixelColor(i+q, 0)
# Main program logic follows:
if __name__ == '__main__':
# Create NeoPixel object with appropriate configuration.
strip = Adafruit_NeoPixel(LED_COUNT, LED_PIN, LED_FREQ_HZ, LED_DMA, LED_INVERT, LED_BRIGHTNESS)
# Intialize the library (must be called once before other functions).
strip.begin()
print ('Press Ctrl-C to quit.')
while True:
# Color wipe animations.
# colorWipe(strip, Color(255, 0, 0)) # Red wipe
# colorWipe(strip, Color(0, 255, 0)) # Blue wipe
# colorWipe(strip, Color(0, 0, 255)) # Green wipe
# colorHalfHalf(strip, Color(0,0,255), Color(255,255,255))
# colorOnePixel(strip, Color(0,0,155))
# colorTwoPixel(strip, Color(0,0,255))
# colorTwoPixelTwoColors(strip, Color(0,0,255), Color(0,255,0))
# colorThreePixel(strip, Color(0,0,255))
# colorLampOneColor(strip, Color(0,0,255), 6)
colorLampTwoColors(strip, Color(0,255,0), Color(0,0,255), 30)
# Theater chase animations.
# theaterChase(strip, Color(127, 127, 127)) # White theater chase
# theaterChase(strip, Color(127, 0, 0)) # Red theater chase
# theaterChase(strip, Color( 0, 0, 127)) # Blue theater chase
# Rainbow animations.
# rainbow(strip)
# rainbowCycle(strip)
# theaterChaseRainbow(strip)