ledky.pyx

# NeoPixel library strandtest example
# Author: Tony DiCola (tony@tonydicola.com)
#
# Direct port of the Arduino NeoPixel library strandtest example.  Showcases
# various animations on a strip of NeoPixels.
import time

from neopixel import *
from Queue import Queue


# LED strip configuration:
LED_COUNT   = 240      # 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_INVERT  = False   # True to invert the signal (when using NPN transistor level shift)

q = Queue()

# Define functions which animate LEDs in various ways.
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(((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)

import threading
class Anims(threading.Thread):
	def run(self):
		while True:
			j = q.get()
			if j == 'quit':
				q.task_done()
				break

			for i in range(strip.numPixels()):
				strip.setPixelColor(i, wheel(((i * 256 / strip.numPixels()) + j) & 255))
			strip.show()
			q.task_done()

#		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
#			# 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)	


# Main program logic follows:
strip = None
def main():
	global strip
	# Create NeoPixel object with appropriate configuration.
	strip = Adafruit_NeoPixel(LED_COUNT, LED_PIN, LED_FREQ_HZ, LED_DMA, LED_INVERT)
	# Intialize the library (must be called once before other functions).
	strip.begin()

	print 'Press Ctrl-C to quit.'
	a = Anims()
	a.start()
	import sys
	while True:
		l = sys.stdin.readline()
		l = l.split()
		if l[0] == 'quit':
			q.put('quit')
			a.join()
			exit(0)
		try:
			n = int(l[0])
			#print n
			q.put(n)
		except Exception as e:
			print e
			pass

if __name__ == '__main__':
	main()