Add RGB control via touch pads

Implement touch controls to adjust RGB values for the LED.

Author: TheKitty

Gemma/Gemma_LightTouch/red_green_blue/code.py

@@ -0,0 +1,29 @@
+# SPDX-FileCopyrightText: 2018 Kattni Rembor for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+
+"""Touch each pad to change red, green, and blue values on the LED"""
+import time
+
+import adafruit_dotstar
+import board
+import touchio
+
+led = adafruit_dotstar.DotStar(board.APA102_SCK, board.APA102_MOSI, 1)
+touch_A0 = touchio.TouchIn(board.A0)
+touch_A1 = touchio.TouchIn(board.A1)
+touch_A2 = touchio.TouchIn(board.A2)
+
+r = g = b = 0
+
+while True:
+    if touch_A0.value:
+        r = (r + 1) % 256
+    if touch_A1.value:
+        g = (g + 1) % 256
+    if touch_A2.value:
+        b = (b + 1) % 256
+
+    led[0] = (r, g, b)
+    print((r, g, b))
+    time.sleep(0.01)