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79 lines
3.1 KiB
79 lines
3.1 KiB
# NeoPixel library strandtest example
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# Author: Tony DiCola (tony@tonydicola.com)
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#
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# Direct port of the Arduino NeoPixel library strandtest example. Showcases
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# various animations on a strip of NeoPixels.
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import time
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from neopixel import *
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# LED strip configuration:
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LED_1_COUNT = 30 # Number of LED pixels.
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LED_1_PIN = 18 # GPIO pin connected to the pixels (must support PWM! GPIO 13 and 18 on RPi 3).
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LED_1_FREQ_HZ = 800000 # LED signal frequency in hertz (usually 800khz)
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LED_1_DMA = 10 # DMA channel to use for generating signal (Between 1 and 14)
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LED_1_BRIGHTNESS = 128 # Set to 0 for darkest and 255 for brightest
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LED_1_INVERT = False # True to invert the signal (when using NPN transistor level shift)
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LED_1_CHANNEL = 0 # 0 or 1
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LED_1_STRIP = ws.SK6812_STRIP_GRBW
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LED_2_COUNT = 15 # Number of LED pixels.
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LED_2_PIN = 13 # GPIO pin connected to the pixels (must support PWM! GPIO 13 or 18 on RPi 3).
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LED_2_FREQ_HZ = 800000 # LED signal frequency in hertz (usually 800khz)
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LED_2_DMA = 11 # DMA channel to use for generating signal (Between 1 and 14)
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LED_2_BRIGHTNESS = 128 # Set to 0 for darkest and 255 for brightest
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LED_2_INVERT = False # True to invert the signal (when using NPN transistor level shift)
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LED_2_CHANNEL = 1 # 0 or 1
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LED_2_STRIP = ws.WS2811_STRIP_GRB
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def multiColorWipe(color1, color2, wait_ms=5):
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global strip1
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global strip2
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"""Wipe color across multiple LED strips a pixel at a time."""
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for i in range(strip1.numPixels()):
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if i % 2:
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# even number
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strip1.setPixelColor(i, color1)
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strip2.setPixelColor(i / 2, color2)
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strip1.show()
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time.sleep(wait_ms/1000.0)
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strip2.show()
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time.sleep(wait_ms/1000.0)
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else:
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# odd number
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strip1.setPixelColor(i, color1)
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strip1.show()
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time.sleep(wait_ms/1000.0)
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time.sleep(1)
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def blackout(strip):
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for i in range(max(strip1.numPixels(), strip1.numPixels())):
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strip.setPixelColor(i, Color(0,0,0))
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strip.show()
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# Main program logic follows:
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if __name__ == '__main__':
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# Create NeoPixel objects with appropriate configuration for each strip.
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strip1 = Adafruit_NeoPixel(LED_1_COUNT, LED_1_PIN, LED_1_FREQ_HZ, LED_1_DMA, LED_1_INVERT, LED_1_BRIGHTNESS, LED_1_CHANNEL, LED_1_STRIP)
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strip2 = Adafruit_NeoPixel(LED_2_COUNT, LED_2_PIN, LED_2_FREQ_HZ, LED_2_DMA, LED_2_INVERT, LED_2_BRIGHTNESS, LED_2_CHANNEL, LED_2_STRIP)
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# Intialize the library (must be called once before other functions).
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strip1.begin()
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strip2.begin()
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print ('Press Ctrl-C to quit.')
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# Black out any LEDs that may be still on for the last run
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blackout(strip1)
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blackout(strip2)
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while True:
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# Multi Color wipe animations.
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multiColorWipe(Color(255, 0, 0), Color(255, 0, 0)) # Red wipe
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multiColorWipe(Color(0, 255, 0), Color(0, 255, 0)) # Blue wipe
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multiColorWipe(Color(0, 0, 255), Color(0, 0, 255)) # Green wipe
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multiColorWipe(Color(255, 255, 255), Color(255, 255, 255)) # Composite White wipe
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multiColorWipe(Color(0, 0, 0, 255), Color(0, 0, 0)) # White wipe
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multiColorWipe(Color(255, 255, 255, 255), Color(0, 0, 0)) # Composite White + White LED wipe
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