Merge pull request adafruit#1891 from jedgarpark/four-key-keypad

first commit Pico four key keypad

Author: jedgarpark

Pico_Four_Keypad/code.py

@@ -0,0 +1,47 @@
+# SPDX-FileCopyrightText: 2021 john park for Adafruit Industries
+# SPDX-License-Identifier: MIT
+# Pico Four Key USB HID Keypad
+
+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
+
+kpd = Keyboard(usb_hid.devices)
+
+# define buttons
+num_keys = 4
+pins = (
+    board.GP0,
+    board.GP1,
+    board.GP2,
+    board.GP3
+)
+
+keys = []
+for pin in pins:
+    tmp_pin = DigitalInOut(pin)
+    tmp_pin.pull = Pull.UP
+    keys.append(Debouncer(tmp_pin))
+
+keymap = {
+    (0): ("Select all", [Keycode.GUI, Keycode.A]),
+    (1): ("Cut", [Keycode.GUI, Keycode.X]),
+    (2): ("Copy", [Keycode.GUI, Keycode.C]),
+    (3): ("Paste", [Keycode.GUI, Keycode.V])
+}
+
+print("\nWelcome to keypad")
+print("keymap:")
+for k in range(num_keys):
+    print("\t", (keymap[k][0]))
+
+
+while True:
+    for i in range(num_keys):
+        keys[i].update()
+        if keys[i].fell:
+            print(keymap[i][0])
+            kpd.send(*keymap[i][1])