mirror of
https://github.com/node-red/node-red-nodes.git
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207 lines
7.6 KiB
Python
Executable File
207 lines
7.6 KiB
Python
Executable File
#!/usr/bin/python
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# Import library functions we need
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import sys
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import time
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try:
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from rpi_ws281x import __version__, PixelStrip, Adafruit_NeoPixel, Color
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except ImportError:
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from neopixel import Adafruit_NeoPixel as PixelStrip, Color
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__version__ = "legacy"
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try:
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raw_input # Python 2
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except NameError:
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raw_input = input # Python 3
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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 (must support 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 # PWM channel
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LED_GAMMA = [
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2,
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2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5,
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6, 6, 6, 7, 7, 7, 8, 8, 8, 9, 9, 9, 10, 10, 11, 11,
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11, 12, 12, 13, 13, 13, 14, 14, 15, 15, 16, 16, 17, 17, 18, 18,
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19, 19, 20, 21, 21, 22, 22, 23, 23, 24, 25, 25, 26, 27, 27, 28,
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29, 29, 30, 31, 31, 32, 33, 34, 34, 35, 36, 37, 37, 38, 39, 40,
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40, 41, 42, 43, 44, 45, 46, 46, 47, 48, 49, 50, 51, 52, 53, 54,
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55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70,
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71, 72, 73, 74, 76, 77, 78, 79, 80, 81, 83, 84, 85, 86, 88, 89,
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90, 91, 93, 94, 95, 96, 98, 99,100,102,103,104,106,107,109,110,
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111,113,114,116,117,119,120,121,123,124,126,128,129,131,132,134,
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135,137,138,140,142,143,145,146,148,150,151,153,155,157,158,160,
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162,163,165,167,169,170,172,174,176,178,179,181,183,185,187,189,
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191,193,194,196,198,200,202,204,206,208,210,212,214,216,218,220,
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222,224,227,229,231,233,235,237,239,241,244,246,248,250,252,255]
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LED_COUNT = max(0,int(sys.argv[1]))
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WAIT_MS = max(0,int(sys.argv[2]))
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MODE = sys.argv[3]
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LED_BRIGHTNESS = min(255,int(max(0,float(sys.argv[4])) * 255 / 100))
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if (sys.argv[5].lower() != "true"):
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LED_GAMMA = range(256)
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LED_CHANNEL = int(sys.argv[6])
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LED_PIN = int(sys.argv[7])
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def getRGBfromI(RGBint):
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blue = RGBint & 255
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green = (RGBint >> 8) & 255
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red = (RGBint >> 16) & 255
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return red, green, blue
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# Define functions which animate LEDs in various ways.
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def setPixel(strip, i, color):
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"""Set a single pixel"""
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strip.setPixelColor(i, color)
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strip.show()
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def setPixels(strip, s, e, color, wait_ms=30):
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"""Set pixels from s(tart) to e(nd)"""
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if (wait_ms > 0):
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for i in range(s, e+1):
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strip.setPixelColor(i, color)
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strip.show()
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time.sleep(wait_ms/1000.0)
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else:
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for i in range(s, e+1):
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strip.setPixelColor(i, color)
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strip.show()
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def setBrightness(strip, brightness, wait_ms=30):
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"""Set overall brighness"""
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strip.setBrightness(brightness)
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strip.show()
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time.sleep(wait_ms/1000.0)
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def colorWipe(strip, color, wait_ms=30):
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"""Wipe color across display a pixel at a time."""
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if (wait_ms > 0):
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for i in range(strip.numPixels()):
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strip.setPixelColor(i, color)
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strip.show()
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time.sleep(wait_ms/1000.0)
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else:
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for i in range(strip.numPixels()):
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strip.setPixelColor(i, color)
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strip.show()
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def shiftUp(strip, color, wait_ms=30):
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"""Shift all pixels one way."""
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oldcolour = strip.getPixelColor(0)
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strip.setPixelColor(0, color)
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strip.show()
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if (wait_ms > 0):
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time.sleep(wait_ms/1000.0)
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for i in range(1,LED_COUNT):
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newcolour = oldcolour
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oldcolour = strip.getPixelColor(i)
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strip.setPixelColor(i, newcolour)
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strip.show()
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time.sleep(wait_ms/1000.0)
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else:
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for i in range(1,LED_COUNT):
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newcolour = oldcolour
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oldcolour = strip.getPixelColor(i)
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strip.setPixelColor(i, newcolour)
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strip.show()
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def shiftDown(strip, color, wait_ms=30):
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"""Shift all pixels the other way."""
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oldcolour = strip.getPixelColor(LED_COUNT-1)
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strip.setPixelColor(LED_COUNT-1, color)
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strip.show()
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if (wait_ms > 0):
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time.sleep(wait_ms/1000.0)
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for i in range(LED_COUNT-2,-1,-1):
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newcolour = oldcolour
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oldcolour = strip.getPixelColor(i)
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strip.setPixelColor(i, newcolour)
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strip.show()
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time.sleep(wait_ms/1000.0)
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else:
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for i in range(LED_COUNT-2,-1,-1):
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newcolour = oldcolour
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oldcolour = strip.getPixelColor(i)
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strip.setPixelColor(i, newcolour)
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strip.show()
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def wheel(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(strip, wait_ms=20, iterations=2):
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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(strip.numPixels()):
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strip.setPixelColor(i, wheel((i+j) & 255))
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strip.show()
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time.sleep(wait_ms/1000.0)
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def rainbowCycle(strip, wait_ms=20, iterations=2):
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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(strip.numPixels()):
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strip.setPixelColor(i, wheel(((i * 256 / strip.numPixels()) + j) & 255))
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strip.show()
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time.sleep(wait_ms/1000.0)
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# Main loop:
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if __name__ == '__main__':
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# Create NeoPixel object with appropriate configuration.
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#strip = Adafruit_NeoPixel(LED_COUNT, LED_PIN, LED_FREQ_HZ, LED_DMA, LED_INVERT, LED_BRIGHTNESS)
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if __version__ == "legacy":
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strip = PixelStrip(LED_COUNT, LED_PIN, LED_FREQ_HZ, LED_DMA, LED_INVERT, LED_BRIGHTNESS, LED_CHANNEL)
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else:
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strip = PixelStrip(LED_COUNT, LED_PIN, LED_FREQ_HZ, LED_DMA, LED_INVERT, LED_BRIGHTNESS, LED_CHANNEL, LED_GAMMA)# Intialize the library (must be called once before other functions).
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strip.begin()
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## Color wipe animations.
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colorWipe(strip, Color(127, 0, 0), WAIT_MS) # Red wipe
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colorWipe(strip, Color(0, 127, 0), WAIT_MS) # Green wipe
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colorWipe(strip, Color(0, 0, 127), WAIT_MS) # Blue wipe
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colorWipe(strip, Color(0, 0, 0), WAIT_MS) # Off wipe
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## Rainbow animations.
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#rainbow(strip)
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#rainbowCycle(strip)
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#colorWipe(strip, Color(0, 0, 0)) # Off wipe
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while True:
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try:
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data = raw_input()
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bits = data.split(',')
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if len(bits) == 2:
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if bits[0] == "brightness":
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setBrightness(strip, min(255,max(0,int(bits[1]))), WAIT_MS)
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if len(bits) == 3:
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if MODE == "shiftu":
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shiftUp(strip, Color(int(bits[0]), int(bits[1]), int(bits[2])), WAIT_MS)
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elif MODE == "shiftd":
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shiftDown(strip, Color(int(bits[0]), int(bits[1]), int(bits[2])), WAIT_MS)
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else:
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colorWipe(strip, Color(int(bits[0]), int(bits[1]), int(bits[2])), WAIT_MS)
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if (MODE[0] == 'p' and len(bits) == 4):
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setPixel(strip, int(bits[0]), Color(int(bits[1]), int(bits[2]), int(bits[3]) ))
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if (MODE[0] == 'p' and len(bits) == 5):
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setPixels(strip, int(bits[0]), int(bits[1]), Color(int(bits[2]), int(bits[3]), int(bits[4]) ), WAIT_MS)
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except (EOFError, SystemExit): # hopefully always caused by us sigint'ing the program
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sys.exit(0)
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except Exception as ex:
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print("bad data: "+data)
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print(ex)
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