Decorator key test example

This example allows you to test each key and LED in turn.

1. At startup all LEDs should be white
2. Press a key and it will turn blue
3. Release that key and it will turn white
4. *Hold* a key and it will turn red
5. Release a *held* key and it will turn green

If you can turn all your keys blue -> red -> green, they're good!

examples/decorator-key-test.py

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+# SPDX-FileCopyrightText: 2021 Philip Howard
+#
+# SPDX-License-Identifier: MIT
+
+# This example allows you to test each key and LED in turn
+# 1. At startup all LEDs should be white
+# 2. Press a key and it will turn blue
+# 3. Release that key and it will turn white
+# 4. *Hold* a key and it will turn red
+# 5. Release a *held* key and it will turn green.
+# If you can turn all your keys blue -> red -> green, they're good!
+
+# Drop the keybow2040.py file into your `lib` folder on your `CIRCUITPY` drive.
+
+import board
+from keybow2040 import Keybow2040
+import time
+
+i2c = board.I2C()
+keybow = Keybow2040(i2c)
+keys = keybow.keys
+
+keybow.set_all(64, 64, 64)
+
+for key in keys:
+    @keybow.on_press(key)
+    def press_handler(key):
+        print("Key {} pressed".format(key.number))
+        key.set_led(0, 0, 255)
+
+    @keybow.on_release(key)
+    def release_handler(key):
+        print("Key {} released".format(key.number))
+        if key.rgb == [255, 0, 0]:
+            key.set_led(0, 255, 0)
+        else:
+            key.set_led(64, 64, 64)
+
+    @keybow.on_hold(key)
+    def hold_handler(key):
+        print("Key {} held".format(key.number))
+        key.set_led(255, 0, 0)
+
+while True:
+    keybow.update()
+    time.sleep(1.0 / 60)