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neopixels.py
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neopixels.py
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# Modified from the NeoPixel library strandtest example
# Original author: Tony DiCola ([email protected])
# KnightRider sequence by Neil Lambeth @NeilRedRobotics
#
# Direct port of the Arduino NeoPixel library strandtest example. Showcases
# various animations on a strip of NeoPixels.
import time
from neopixel import *
print("neopixels loaded")
print('Change the number of pixels you are using in /RedBoard/neopixels.py')
print('')
# LED strip configuration:
LED_COUNT = 10 # Number of LED pixels.
LED_PIN = 12 # GPIO pin connected to the pixels (12 uses PWM!).
#LED_PIN = 10 # GPIO pin connected to the pixels (10 uses SPI /dev/spidev0.0).
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 = 127 # Set to 0 for darkest and 255 for brightest
LED_INVERT = False # True to invert the signal (when using NPN transistor level shift)
LED_CHANNEL = 0 # set to '1' for GPIOs 13, 19, 41, 45 or 53
LED_STRIP = ws.WS2811_STRIP_GRB # Strip type and colour ordering
red = 0
green = 0
blue = 0
# Set up LED brightness values for use with knightRider_fade
#f1,f2,f3,f4,f5,f6,f7,f8,f9,f10,f11,f12,f13,f14 = 255,22,20,18,16,14,12,10,8,6,4,2,1,0
f1,f2,f3,f4,f5,f6,f7,f8,f9,f10,f11,f12,f13,f14 = 255,30,20,10,9,8,7,6,5,4,3,2,1,0
fade0 = (f1,f1,f2,f2,f3,f3,f4,f4,f5,f5,f6,f6,f7,f7,f8,f8)
fade1 = (f2,f2,f1,f1,f4,f4,f5,f5,f6,f6,f7,f7,f8,f8,f9,f9)
fade2 = (f3,f3,f2,f2,f1,f1,f6,f6,f7,f7,f8,f8,f9,f9,f10,f10)
fade3 = (f4,f4,f3,f3,f2,f2,f1,f1,f8,f8,f9,f9,f10,f10,f11,f11)
fade4 = (f5,f5,f4,f4,f3,f3,f2,f2,f1,f1,f10,f10,f11,f11,f12,f12)
fade5 = (f6,f6,f5,f5,f4,f4,f3,f3,f2,f2,f1,f1,f12,f12,f13,f13)
fade6 = (f7,f7,f6,f6,f5,f5,f4,f4,f3,f3,f2,f2,f1,f1,f14,f14)
fade7 = (f8,f8,f7,f7,f6,f6,f5,f5,f4,f4,f3,f3,f2,f2,f1,f1)
fade8 = (f9,f9,f8,f8,f7,f7,f6,f6,f5,f5,f4,f4,f1,f1,f2,f2)
fade9 = (f10,f10,f9,f9,f8,f8,f7,f7,f6,f6,f1,f1,f2,f2,f3,f3)
fade10 = (f11,f11,f10,f10,f9,f9,f8,f8,f1,f1,f2,f2,f3,f3,f4,f4)
fade11 = (f12,f12,f11,f11,f10,f10,f1,f1,f2,f2,f3,f3,f4,f4,f5,f5)
fade12 = (f13,f13,f14,f14,f1,f1,f2,f2,f3,f3,f4,f4,f5,f5,f6,f6)
fade13 = (f14,f14,f1,f1,f2,f2,f3,f3,f4,f4,f5,f5,f6,f6,f7,f7)
f = (fade0,fade1,fade2,fade3,fade4,fade5,fade6,fade7,fade8,fade9,fade10,fade11,fade12,fade13)
# Define functions which animate LEDs in various ways.
def clear():
for i in range(strip.numPixels()):
strip.setPixelColor(i,0)
strip.show()
def knightRider_fade(): # Works with 16 neopixels
while True:
for a in range(0,14):
for i in range(0,16):
strip.setPixelColorRGB(i, f[a][i],0,0)
#print(i,f[a][i])
strip.show()
time.sleep(0.1)
#print('')
def knightRider():
while True:
for i in range(0,strip.numPixels()-2):
strip.setPixelColorRGB(i, 255,0,0)
strip.show()
time.sleep(0.1)
clear()
for i in range(strip.numPixels()-2,0,-1):
strip.setPixelColorRGB(i, 255,0,0)
strip.setPixelColorRGB(i+1, 255,0,0)
strip.show()
time.sleep(0.1)
clear()
def headLights():
for i in range(strip.numPixels()):
strip.setPixelColor(i,0xFFFFFF)
strip.show()
def setColour(P,R,G,B):
strip.setPixelColorRGB(P,R,G,B)
strip.show()
def heartBeat():
red = 0
while True:
#Fade up one red LED
for i in range(0, 255):# Count from 0 to 255 - 255 is the max brightness for the NeoPixels
red = red + 1 #Increase red brightness
strip.setPixelColorRGB(0, red,0,0)
strip.show()
time.sleep(0.01)
#Fade Down one red LED
for i in range(0, 255):# Count to 255
red = red - 1 #Decrease red brightness
strip.setPixelColorRGB(0, red,0,0)
strip.show()
time.sleep(0.01)
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=50, iterations=10):
"""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)
def demo():
print ('Press Ctrl-C to quit.')
while True:
print ('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
print ('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
print ('Rainbow animations.')
rainbow(strip)
rainbowCycle(strip)
theaterChaseRainbow(strip)
# 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, LED_CHANNEL, LED_STRIP)
# Intialize the library (must be called once before other functions).
strip.begin()