Merge pull request #2321 from jepler/ibm-pc-keyboard-adapter

Ibm pc keyboard adapter

Author: TheKitty

CircuitPython_IBM_XT_Keyboard_QTPy_RP2040/code.py

@@ -0,0 +1,67 @@
+# SPDX-FileCopyrightText: 2022 Jeff Epler for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+# IBM Keyboard to USB Adapter
+import array
+import board
+import rp2pio
+import usb_hid
+from adafruit_hid.keyboard import Keyboard
+from adafruit_hid.keycode import Keycode as K
+import adafruit_pioasm
+
+# from https://www.scs.stanford.edu/10wi-cs140/pintos/specs/kbd/scancodes-9.html
+# translating from "Set 1" to USB using the adafruit_hid keycode names
+# fmt: off
+xt_keycodes = [
+    None, K.ESCAPE, K.ONE, K.TWO, K.THREE, K.FOUR, K.FIVE, K.SIX,
+    K.SEVEN, K.EIGHT, K.NINE, K.ZERO, K.MINUS, K.EQUALS, K.BACKSPACE, K.TAB, K.Q,
+    K.W, K.E, K.R, K.T, K.Y, K.U, K.I, K.O, K.P, K.LEFT_BRACKET, K.RIGHT_BRACKET,
+    K.RETURN, K.LEFT_CONTROL, K.A, K.S, K.D, K.F, K.G, K.H, K.J, K.K, K.L,
+    K.SEMICOLON, K.QUOTE, K.GRAVE_ACCENT, K.SHIFT, K.BACKSLASH, K.Z, K.X, K.C, K.V,
+    K.B, K.N, K.M, K.COMMA, K.PERIOD, K.FORWARD_SLASH, K.RIGHT_SHIFT,
+    K.KEYPAD_ASTERISK, K.OPTION, K.SPACEBAR, K.CAPS_LOCK, K.F1, K.F2, K.F3, K.F4,
+    K.F5, K.F6, K.F7, K.F8, K.F9, K.F10, K.KEYPAD_NUMLOCK, K.SCROLL_LOCK,
+    K.KEYPAD_SEVEN, K.KEYPAD_EIGHT, K.KEYPAD_NINE, K.KEYPAD_MINUS, K.KEYPAD_FOUR,
+    K.KEYPAD_FIVE, K.KEYPAD_SIX, K.KEYPAD_PLUS, K.KEYPAD_ONE, K.KEYPAD_TWO,
+    K.KEYPAD_THREE, K.KEYPAD_ZERO, K.KEYPAD_PERIOD, None, None, None, K.F11, K.F12
+]
+# fmt: on
+
+program = adafruit_pioasm.Program("""
+    wait 0 pin 2
+    in pins, 1
+    wait 1 pin 2
+""",
+build_debuginfo=True)
+
+sm = rp2pio.StateMachine(program.assembled,
+    first_in_pin = board.MISO,
+    in_pin_count = 3,
+    pull_in_pin_up = 0b111,
+    auto_push=True,
+    push_threshold=10,
+    in_shift_right=True,
+    frequency=8_000_000,
+    **program.pio_kwargs)
+
+buf = array.array('H', [0])
+
+print("Ready to type")
+kbd = Keyboard(usb_hid.devices)
+while True:
+    sm.readinto(buf, swap=False)
+    val = buf[0]
+    pressed = not val & 0x8000
+    key_number = (val >> 8) & 0x7f
+    if key_number > len(xt_keycodes):
+        print(f"invalid key number {key_number} pressed")
+        continue
+    keycode = xt_keycodes[key_number]
+    print(f"{keycode} {'PRESSED' if pressed else 'released'}")
+    if keycode is None:
+        continue
+    if pressed:
+        kbd.press(keycode)
+    else:
+        kbd.release(keycode)