add example for using this library with the pca9685, useful for Pi, etc!

Author: brentru

examples/rgbled_pca9685.py

@@ -0,0 +1,67 @@
+import time
+import board
+import busio
+import adafruit_pca9685
+import adafruit_rgbled
+
+# PCA9685 Initialization
+i2c = busio.I2C(board.SCL, board.SDA)
+pca = adafruit_pca9685.PCA9685(i2c)
+pca.frequency=60
+
+# PCA9685 LED Channels
+RED_LED = pca.channels[0]
+GREEN_LED = pca.channels[1]
+BLUE_LED = pca.channels[2]
+
+# Create the RGB LED object
+led = adafruit_rgbled.RGBLED(RED_LED, GREEN_LED, BLUE_LED, invert_pwm=True)
+
+# Optionally, you can also create the RGB LED object with inverted PWM
+# led = adafruit_rgbled.RGBLED(RED_LED, GREEN_LED, BLUE_LED, invert_pwm=True)
+
+def wheel(pos):
+    # Input a value 0 to 255 to get a color value.
+    # The colours are a transition r - g - b - back to r.
+    if pos < 0 or pos > 255:
+        return 0, 0, 0
+    if pos < 85:
+        return int(255 - pos * 3), int(pos * 3), 0
+    if pos < 170:
+        pos -= 85
+        return 0, int(255 - pos * 3), int(pos * 3)
+    pos -= 170
+    return int(pos * 3), 0, int(255 - (pos * 3))
+
+def rainbow_cycle(wait):
+    for i in range(255):
+        i = (i + 1) % 256
+        led.color = wheel(i)
+        time.sleep(wait)
+
+while True:
+    # setting RGB LED color to RGB Tuples (R, G, B)
+    print('setting color 1')
+    led.color = (255, 0, 0)
+    time.sleep(1)
+
+    print('setting color 2')
+    led.color = (0, 255, 0)
+    time.sleep(1)
+
+    print('setting color 3')
+    led.color = (0, 0, 255)
+    time.sleep(1)
+
+    # setting RGB LED color to 24-bit integer values
+    led.color = 0xFF0000
+    time.sleep(1)
+
+    led.color = 0x00FF00
+    time.sleep(1)
+
+    led.color = 0x0000FF
+    time.sleep(1)
+
+    # rainbow cycle the RGB LED
+    rainbow_cycle(0.01)