led_matrix_test.py

from rpi_ws281x import PixelStrip, Color
import time

# LED strip configuration:
LED_COUNT = 1536        # Number of LED pixels.
LED_PIN = 13          # GPIO pin connected to the pixels (18 uses PWM!).
#LED_PIN = 10        # GPIO pin connected to the pixels (10 uses SPI /dev/spidev0.0).
LED_FREQ_HZ = 800000  # LED signal frequency in hertz (usually 800khz)
LED_DMA = 10          # DMA channel to use for generating signal (try 10)
LED_BRIGHTNESS = 8  # Set to 0 for darkest and 255 for brightest
LED_INVERT = False    # True to invert the signal (when using NPN transistor level shift)
LED_CHANNEL = 1       # set to '1' for GPIOs 13, 19, 41, 45 or 53

if __name__ == "__main__":
    # Create NeoPixel object with appropriate configuration.
    strip = PixelStrip(LED_COUNT, LED_PIN, LED_FREQ_HZ, LED_DMA, LED_INVERT, LED_BRIGHTNESS, LED_CHANNEL)
    # Intialize the library (must be called once before other functions).
    strip.begin()

    try: 
        while True:
            for i in range(0, LED_COUNT):
                strip.setPixelColor(i, Color(255, 0, 0))
            strip.show()            
            time.sleep(1.5)

            for i in range(0, LED_COUNT):
                strip.setPixelColor(i, Color(0, 255, 0))
            strip.show()            
            time.sleep(1.5)

            for i in range(0, LED_COUNT):
                strip.setPixelColor(i, Color(0, 0, 255))
            strip.show()
            time.sleep(1.5)

            for i in range(0, LED_COUNT):
                strip.setPixelColor(i, Color(255, 255, 255))        
            strip.show()
            time.sleep(1.5)
            

    except KeyboardInterrupt:
        for i in range(0, LED_COUNT):
            strip.setPixelColor(i, Color(0,0,0))        
        strip.show()