Implement Gemma IO demo for iCade Pinball

Revert commit of GitHub error code replacing the CircuitPython code

Author: TheKitty

Gemma/GemmaM0_Pinball/code.py

@@ -1,2 +1,75 @@
-429: Too Many Requests
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+# SPDX-FileCopyrightText: 2022 john park & tod kurt for Adafruit Industries
+# SPDX-License-Identifier: MIT
+# Gemma IO demo - Keyboard emu
+# iCade Pinball Edition
+
+import board
+from digitalio import DigitalInOut, Pull
+from adafruit_debouncer import Debouncer
+import usb_hid
+from adafruit_hid.keyboard import Keyboard
+from adafruit_hid.keycode import Keycode
+
+# Allows three buttons on a Gemma M0 to control iCade standard Pinball Arcade
+# game on iOS using USB to Lightning "camera connector"
+
+# iCade keyboard mappings
+# See developer doc at: http://www.ionaudio.com/products/details/icade
+
+#    WE     YT UF IM OG
+# AQ< -->DC
+#    XZ     HR JN KP LV
+
+#control key is triggered by a press, doesn't repeat, second control key is
+#triggered by a release
+
+# define buttons
+num_keys = 3
+pins = (
+    board.D0, # D0
+    board.D1, # D1
+    board.D2 # D2
+)
+
+keys = []
+
+# The keycode pair sent for each button:
+# D0 is left flipper -  iCade key sequence (hold, release) is "hr"
+# D1 is right flipper - iCade key sequence (hold, release) is "lv"
+# D2 is plunger -       iCade key sequence (hold, release) is "xz"
+
+for pin in pins:
+    tmp_pin = DigitalInOut(pin)
+    tmp_pin.pull = Pull.UP
+    keys.append(Debouncer(tmp_pin))
+
+keymap_pressed = {
+    (0): ("Left Paddle", [Keycode.H]),
+    (1): ("Right Paddle", [Keycode.L]),
+    (2): ("Plunger", [Keycode.X])
+}
+keymap_released = {
+    (0): ("Left Paddle", [Keycode.R]),
+    (1): ("Right Paddle", [Keycode.V]),
+    (2): ("Plunger", [Keycode.Z])
+}
+
+# the keyboard object
+kbd = Keyboard(usb_hid.devices)
+
+print("\nWelcome to keypad")
+print("keymap:")
+for k in range(num_keys):
+    print("\t", (keymap_pressed[k][0]))
+print("Waiting for button presses")
+
+
+while True:
+    for i in range(num_keys):
+        keys[i].update()
+        if keys[i].fell:
+            print(keymap_pressed[i][0])
+            kbd.send(*keymap_pressed[i][1])
+        if keys[i].rose:
+            print(keymap_released[i][0])
+            kbd.send(*keymap_released[i][1])