[tool] spi ws2812

tools/orangepi_rpi_ws2812.py

@@ -0,0 +1,36 @@
+from rpi_ws281x import PixelStrip, Color
+import time
+
+# LED strip configuration:
+LED_COUNT = 8      # Number of LED pixels.
+LED_PIN = 16      # 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 = 255  # 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 = 0     # set to '1' for GPIOs 13, 19, 41, 45 or 53
+
+# 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()
+
+def color_chase(color, wait):
+    """颜色追逐效果"""
+    for i in range(strip.numPixels()):
+        strip.setPixelColor(i, color)
+        strip.show()
+        time.sleep(wait)
+
+try:
+    while True:
+        # 渐变色追逐效果
+        for j in range(3):
+            color_chase(Color(255, 0, 0), 0.1)  # 红色
+            color_chase(Color(0, 255, 0), 0.1)  # 绿色
+            color_chase(Color(0, 0, 255), 0.1)  # 蓝色
+
+except KeyboardInterrupt:
+    color_chase(Color(0, 0, 0), 0.1)  # 关闭时变为黑色
+    exit(0)