Gemma LED Crown

Adding code for GEMMA LED Crown

BowsetteCrown/LED_GEMMA_Crown.py

@@ -0,0 +1,38 @@
+import time
+
+import board
+import pulseio
+from digitalio import DigitalInOut, Direction
+
+# PWM (fading) LEDs are connected on D0, D2 (PWM not avail on D1)
+pwm_leds = board.D2
+pwm = pulseio.PWMOut(pwm_leds, frequency=1000, duty_cycle=0)
+
+pwm2_leds = board.D0
+pwm2 = pulseio.PWMOut(pwm2_leds, frequency=1000, duty_cycle=0)
+
+brightness = 0  # how bright the LED is
+fade_amount = 1285  # 2% steping of 2^16
+counter = 0  # counter to keep track of cycles
+
+while True:
+
+    # And send to LED as PWM level
+    pwm.duty_cycle = brightness
+    pwm2.duty_cycle = brightness    
+
+    # change the brightness for next time through the loop:
+    brightness = brightness + fade_amount
+
+    print(brightness)
+
+    # reverse the direction of the fading at the ends of the fade:
+    if brightness <= 0:
+        fade_amount = -fade_amount
+        counter += 1
+    elif brightness >= 65535:
+        fade_amount = -fade_amount
+        counter += 1
+
+    # wait for 15 ms to see the dimming effect
+    time.sleep(.015)