125 lines
5.1 KiB
Python
125 lines
5.1 KiB
Python
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# -*-coding: utf-8 -*-
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import time
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from rpi_ws281x import *
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# LED strip configuration:
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LED_COUNT = 8 # Number of LED pixels.
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LED_PIN = 18 # GPIO pin connected to the pixels (18 uses PWM!).
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LED_FREQ_HZ = 800000 # LED signal frequency in hertz (usually 800khz)
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LED_DMA = 10 # DMA channel to use for generating signal (try 10)
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LED_BRIGHTNESS = 255 # Set to 0 for darkest and 255 for brightest
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LED_INVERT = False # True to invert the signal (when using NPN transistor level shift)
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LED_CHANNEL = 0 # set to '1' for GPIOs 13, 19, 41, 45 or 53
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# Define functions which animate LEDs in various ways.
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class Led:
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def __init__(self):
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# Create NeoPixel object with appropriate configuration.
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self.strip = Adafruit_NeoPixel(LED_COUNT, LED_PIN, LED_FREQ_HZ, LED_DMA, LED_INVERT, LED_BRIGHTNESS, LED_CHANNEL)
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# Intialize the library (must be called once before other functions).
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self.strip.begin()
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self.number='0'
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def colorWipe(self,strip, color, wait_ms=50):
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"""Wipe color across display a pixel at a time."""
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for i in range(self.strip.numPixels()):
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self.strip.setPixelColor(i, color)
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self.strip.show()
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time.sleep(wait_ms/1000.0)
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def theaterChase(self,strip, color, wait_ms=50, iterations=10):
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"""Movie theater light style chaser animation."""
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for j in range(iterations):
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for q in range(3):
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for i in range(0,self.strip.numPixels(), 3):
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self.strip.setPixelColor(i+q, color)
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self.strip.show()
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time.sleep(wait_ms/1000.0)
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for i in range(0, self.strip.numPixels(), 3):
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self.strip.setPixelColor(i+q, 0)
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def wheel(self,pos):
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"""Generate rainbow colors across 0-255 positions."""
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if pos < 85:
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return Color(pos * 3, 255 - pos * 3, 0)
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elif pos < 170:
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pos -= 85
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return Color(255 - pos * 3, 0, pos * 3)
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else:
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pos -= 170
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return Color(0, pos * 3, 255 - pos * 3)
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def rainbow(self,strip, wait_ms=20, iterations=1):
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"""Draw rainbow that fades across all pixels at once."""
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for j in range(256*iterations):
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for i in range(self.strip.numPixels()):
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self.strip.setPixelColor(i, self.wheel((i+j) & 255))
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self.strip.show()
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time.sleep(wait_ms/1000.0)
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def rainbowCycle(self,strip, wait_ms=20, iterations=5):
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"""Draw rainbow that uniformly distributes itself across all pixels."""
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for j in range(256*iterations):
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for i in range(self.strip.numPixels()):
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self.strip.setPixelColor(i, self.wheel((int(i * 256 / self.strip.numPixels()) + j) & 255))
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self.strip.show()
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time.sleep(wait_ms/1000.0)
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def theaterChaseRainbow(self,strip, wait_ms=50):
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"""Rainbow movie theater light style chaser animation."""
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for j in range(256):
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for q in range(3):
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for i in range(0, self.strip.numPixels(), 3):
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self.strip.setPixelColor(i+q, self.wheel((i+j) % 255))
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self.strip.show()
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time.sleep(wait_ms/1000.0)
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for i in range(0, strip.numPixels(), 3):
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strip.setPixelColor(i+q, 0)
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def ledIndex(self,index,R,G,B):
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self.strip.setPixelColor(index, Color(R,G,B))
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self.strip.show()
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def ledMode(self,n):
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self.mode=n
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while True:
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if self.mode=='one':
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self.colorWipe(self.strip, Color(255, 0, 0)) # Red wipe
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self.colorWipe(self.strip, Color(0, 255, 0)) # Green wipe
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self.colorWipe(self.strip, Color(0, 0, 255)) # Blue wipe
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self.colorWipe(self.strip, Color(0,0,0),10)
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elif self.mode=='two':
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self.theaterChaseRainbow(self.strip)
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self.colorWipe(self.strip, Color(0,0,0),10)
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elif self.mode=='three':
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self.rainbow(self.strip)
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self.colorWipe(self.strip, Color(0,0,0),10)
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elif self.mode=='four':
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self.rainbowCycle(self.strip)
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self.colorWipe(self.strip, Color(0,0,0),10)
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else:
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self.colorWipe(self.strip, Color(0,0,0),10)
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break
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led=Led()
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# Main program logic follows:
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if __name__ == '__main__':
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print ('Program is starting ... ')
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try:
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while True:
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print "Chaser animation"
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led.colorWipe(led.strip, Color(255, 0, 0)) # Red wipe
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led.colorWipe(led.strip, Color(0, 255, 0)) # Green wipe
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led.colorWipe(led.strip, Color(0, 0, 255)) # Blue wipe
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led.theaterChaseRainbow(led.strip)
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print "Rainbow animation"
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led.rainbow(led.strip)
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led.rainbowCycle(led.strip)
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led.colorWipe(led.strip, Color(0,0,0),10)
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except KeyboardInterrupt: # When 'Ctrl+C' is pressed, the child program destroy() will be executed.
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led.colorWipe(led.strip, Color(0,0,0),10)
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