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| from __future__ import print_function
# Simple demo of of the WS2801/SPI-like addressable RGB LED lights.
import time
import math
import RPi.GPIO as GPIO
# Import the WS2801 module.
import Adafruit_WS2801
import Adafruit_GPIO.SPI as SPI
# Configure the count of pixels:
PIXEL_COUNT = 160
# Alternatively specify a hardware SPI connection on /dev/spidev0.0:
SPI_PORT = 0
SPI_DEVICE = 0
pixels = Adafruit_WS2801.WS2801Pixels(PIXEL_COUNT, spi=SPI.SpiDev(SPI_PORT, SPI_DEVICE), gpio=GPIO)
white = (255, 255, 255)
green = (0, 0, 255)
red = (255, 0, 0)
# Define the wheel function to interpolate between different hues.
def wheel(pos):
if pos < 85:
return Adafruit_WS2801.RGB_to_color(pos * 3, 255 - pos * 3, 0)
elif pos < 170:
pos -= 85
return Adafruit_WS2801.RGB_to_color(255 - pos * 3, 0, pos * 3)
else:
pos -= 170
return Adafruit_WS2801.RGB_to_color(0, pos * 3, 255 - pos * 3)
# Define rainbow cycle function to do a cycle of all hues.
def rainbow_cycle_successive(pixels, wait=0.1):
for i in range(pixels.count()):
pixels.set_pixel(i, wheel(((i * 256 // pixels.count())) % 256))
pixels.show()
if wait > 0:
time.sleep(wait)
def rainbow_cycle(pixels, wait=0.05):
for j in range(256):
for i in range(pixels.count()):
pixels.set_pixel(i, wheel(((i * 256 // pixels.count()) + j) % 256))
pixels.show()
if wait > 0:
time.sleep(wait)
def rainbow_colors(pixels, wait=0.05):
for j in range(256):
for i in range(pixels.count()):
pixels.set_pixel(i, wheel(((256 // pixels.count() + j)) % 256))
pixels.show()
if wait > 0:
time.sleep(wait)
def brightness_decrease(pixels, wait=0.01, step=3):
for j in range(int(256 // step)):
rSum = 0
gSum = 0
bSum = 0
for i in range(pixels.count()):
r, g, b = pixels.get_pixel_rgb(i)
r = int(max(0, r - step))
g = int(max(0, g - step))
b = int(max(0, b - step))
rSum += r
gSum += g
bSum += b
pixels.set_pixel(i, Adafruit_WS2801.RGB_to_color(r, g, b))
pixels.show()
if rSum == 0 and bSum == 0 and gSum == 0:
return
if wait > 0:
time.sleep(wait)
def brightness_fast_decrease(pixels, t=16, step=32):
for j in range(step):
rSum = 0
gSum = 0
bSum = 0
for i in range(pixels.count()):
frac = float(j)/float(step)
r, g, b = pixels.get_pixel_rgb(i)
r = int(max(0, r - math.ceil(r*frac)))
g = int(max(0, g - math.ceil(g*frac)))
b = int(max(0, b - math.ceil(b*frac)))
rSum += r
gSum += g
bSum += b
pixels.set_pixel(i, Adafruit_WS2801.RGB_to_color(r, g, b))
pixels.show()
if rSum == 0 and bSum == 0 and gSum == 0:
return
time.sleep(t / step)
def brightness_increase(pixels, wait=0.01, step=3):
for j in range(int(256 // step)):
for i in range(pixels.count()):
r, g, b = pixels.get_pixel_rgb(i)
if r > 0:
r = int(min(255, r + step))
if g > 0:
g = int(min(255, g + step))
if b > 0:
b = int(min(255, b + step))
pixels.set_pixel(i, Adafruit_WS2801.RGB_to_color(r, g, b))
pixels.show()
if wait > 0:
time.sleep(wait)
def brightness_increase_to_color(pixels, color, step=8, t=0.5):
pixels.clear()
for j in range(step):
for i in range(pixels.count()):
r = min(255, int((float(color[0])/float(step))*j))
g = min(255, int((float(color[1])/float(step))*j))
b = min(255, int((float(color[2])/float(step))*j))
pixels.set_pixel(i, Adafruit_WS2801.RGB_to_color(r, g, b))
pixels.show()
time.sleep(t/float(step))
def set_color(pixels, color, mod, n):
for k in range(pixels.count()):
if k % mod == n:
pixels.set_pixel(k, Adafruit_WS2801.RGB_to_color(color[0], color[1], color[2]))
def blink_rwg(pixels, blink_times=3):
white = (1, 1, 1)
green = (0, 0, 1)
red = (1, 0, 0)
for k in range(blink_times):
brightness_decrease(pixels)
pixels.clear()
set_color(pixels, green, 3, k%3)
set_color(pixels, red, 3, (k+1)%3)
set_color(pixels, white, 3, (k+2)%3)
pixels.show()
brightness_increase(pixels)
time.sleep(0.15)
def roll_rwg(pixels, blink_times=20, wait=0.25):
color = white
for k in range(blink_times):
pixels.clear()
for j in range(pixels.count()):
if ((k+j) % 6) == 0 or ((k+j) % 6) == 1:
color = green
if ((k+j) % 6) == 2 or ((k+j) % 6) == 3:
color = red
if ((k+j) % 6) == 4 or ((k+j) % 6) == 5:
color = white
if ((k+j) % 3) == 0:
color = green
if ((k+j) % 3) == 1:
color = red
if ((k+j) % 3) == 2:
color = white
pixels.set_pixel(j, Adafruit_WS2801.RGB_to_color(color[0], color[1], color[2]))
pixels.show()
time.sleep(wait)
def appear_from_back(pixels, color=(255, 0, 0)):
pos = 0
for i in range(pixels.count()):
for j in reversed(range(i, pixels.count())):
pixels.clear()
# first set all pixels at the begin
for k in range(i):
pixels.set_pixel(k, Adafruit_WS2801.RGB_to_color(color[0], color[1], color[2]))
# set then the pixel at position j
pixels.set_pixel(j, Adafruit_WS2801.RGB_to_color(color[0], color[1], color[2]))
pixels.show()
time.sleep(0.02)
def runAround(pixels):
x = 32
dimColor = (x, 2*x, x)
brightness_decrease(pixels)
brightness_increase_to_color(pixels, dimColor, step=x)
for i in range(pixels.count() -5):
for k in range(pixels.count()):
pixels.set_pixel(k, Adafruit_WS2801.RGB_to_color(dimColor[0], dimColor[1], dimColor[2]))
pixels.set_pixel(i, Adafruit_WS2801.RGB_to_color(red[0], red[1], red[2]))
pixels.set_pixel(i+1, Adafruit_WS2801.RGB_to_color(red[0], red[1], red[2]))
pixels.set_pixel(i+2, Adafruit_WS2801.RGB_to_color(white[0], white[1], white[2]))
pixels.set_pixel(i+3, Adafruit_WS2801.RGB_to_color(white[0], white[1], white[2]))
pixels.set_pixel(i+4, Adafruit_WS2801.RGB_to_color(green[0], green[1], green[2]))
pixels.set_pixel(i+5, Adafruit_WS2801.RGB_to_color(green[0], green[1], green[2]))
pixels.show()
time.sleep(0.00625)
for i in reversed(range(pixels.count() -5)):
for k in range(pixels.count()):
pixels.set_pixel(k, Adafruit_WS2801.RGB_to_color(dimColor[0], dimColor[1], dimColor[2]))
pixels.set_pixel(i, Adafruit_WS2801.RGB_to_color(green[0], green[1], green[2]))
pixels.set_pixel(i+1, Adafruit_WS2801.RGB_to_color(green[0], green[1], green[2]))
pixels.set_pixel(i+2, Adafruit_WS2801.RGB_to_color(white[0], white[1], white[2]))
pixels.set_pixel(i+3, Adafruit_WS2801.RGB_to_color(white[0], white[1], white[2]))
pixels.set_pixel(i+4, Adafruit_WS2801.RGB_to_color(red[0], red[1], red[2]))
pixels.set_pixel(i+5, Adafruit_WS2801.RGB_to_color(red[0], red[1], red[2]))
pixels.show()
time.sleep(0.00625)
for k in range(pixels.count()):
pixels.set_pixel(k, Adafruit_WS2801.RGB_to_color(dimColor[0], dimColor[1], dimColor[2]))
def makeWheel(pixels, steps, j, i):
fraction = float((i+j) % 160)/float(pixels.count())
fracWith2Pi = fraction * 2 * math.pi
currSin = abs(math.sin(fracWith2Pi))
rgbCounter = int(currSin * 255)
return (rgbCounter, 255 - rgbCounter, 0)
def increase_color_for_Wheel(pixels):
steps = 256
pixels.clear()
for j in range(steps):
for i in range(pixels.count()):
color = makeWheel(pixels, 80, 0, i)
r = min(255, int((float(color[0])/float(steps))*j))
g = min(255, int((float(color[1])/float(steps))*j))
b = min(255, int((float(color[2])/float(steps))*j))
pixels.set_pixel(i, Adafruit_WS2801.RGB_to_color(r, g, b))
pixels.show()
time.sleep(0.75/float(steps))
def christmasWheel(pixels, t=3, revolutions=3):
brightness_fast_decrease(pixels)
increase_color_for_Wheel(pixels)
steps = 80
timeSleep = 0.03
color = (0,0,0)
for x in range(revolutions):
for j in range(steps):
pixels.clear()
for i in range(pixels.count()):
color = makeWheel(pixels, steps, j, i)
pixels.set_pixel(i, Adafruit_WS2801.RGB_to_color(color[0],color[1],color[2]))
pixels.show()
time.sleep(timeSleep)
brightness_decrease(pixels)
if __name__ == "__main__":
# Clear all the pixels to turn them off.
while True:
blink_rwg(pixels, 1)
roll_rwg(pixels)
blink_rwg(pixels)
roll_rwg(pixels)
runAround(pixels)
christmasWheel(pixels)
brightness_decrease(pixels)
|
