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jedgarparkjedgarpark
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first commit code and keymap config file
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‎Split_Ortho_Keyboard/code.py‎

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# SPDX-FileCopyrightText: Copyright (c) 2022 John Park & Tod Kurt for Adafruit Industries
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#
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# SPDX-License-Identifier: MIT
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# Ortho split keyboard
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import time
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import board
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from adafruit_tca8418 import TCA8418
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import usb_hid
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from adafruit_hid.keyboard import Keyboard
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from adafruit_hid.keycode import Keycode
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from keymaps import layer_keymaps # keymaps are saved in keymaps.py file
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kbd = Keyboard(usb_hid.devices)
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num_layers = len(layer_keymaps)
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current_layer = 1
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i2c_left = board.STEMMA_I2C() # uses QT Py RP2040 STEMMA QT port
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i2c_right = board.I2C() # I2C channel on the QT Py RP2040 pads broken out on board
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tca_left = TCA8418(i2c_left)
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tca_right = TCA8418(i2c_right)
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tcas = (tca_left, tca_right) # put the TCA objects in a list for easy iteration later
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# set up a R0-R7 pins and C0-C4 pins as keypads
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KEYPADPINS = (
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TCA8418.R0, TCA8418.R1, TCA8418.R2, TCA8418.R3, TCA8418.R4,
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TCA8418.C0, TCA8418.C1, TCA8418.C2, TCA8418.C3, TCA8418.C4, TCA8418.C5
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)
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for tca in tcas:
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for pin in KEYPADPINS:
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tca.keypad_mode[pin] = True
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tca.enable_int[pin] = True
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tca.event_mode_fifo[pin] = True
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tca.key_intenable = True
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print("Ortho Split Keyboard")
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while True:
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for i in range(len(tcas)):
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tca = tcas[i] # get the TCA we're working with
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keymap = layer_keymaps[current_layer][i] # get the corresponding keymap for it
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if tca.key_int:
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events = tca.events_count
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for _ in range(events):
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keyevent = tca.next_event
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keymap_number = (keyevent & 0x7F)
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(modifier, keycode) = keymap[keymap_number] # get keycode & modifer from keymap
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# print("\tKey event: 0x%02X - key #%d " % (keyevent, keyevent & 0x7F))
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if keycode is None:
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pass
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else:
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if keyevent & 0x80: # if key is pressed
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if modifier == 0: # normal keypress
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kbd.press(keycode)
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elif modifier == 1: # lower
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current_layer = min(max((current_layer-1), 0), num_layers-1)
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elif modifier == 2: # raise
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current_layer = min(max((current_layer+1), 0), num_layers-1)
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elif modifier == 7: # cap mod
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kbd.press(Keycode.SHIFT, keycode)
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else: # key released
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if modifier == 7: # capped shifted key requires special handling
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kbd.release(Keycode.SHIFT, keycode)
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else:
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kbd.release(keycode)
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tca.key_int = True # clear the IRQ by writing 1 to it
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time.sleep(0.01)

‎Split_Ortho_Keyboard/keymaps.py‎

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# SPDX-FileCopyrightText: Copyright (c) 2022 John Park & Tod Kurt for Adafruit Industries
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#
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# SPDX-License-Identifier: MIT
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from adafruit_hid.keycode import Keycode
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# https://docs.circuitpython.org/projects/hid/en/latest/api.html#adafruit-hid-keycode-keycode
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# keymap is keynumber, (modifier, keycode)
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# lower keymap layer
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km_lf_0 = {
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(1) : (0, Keycode.F11),
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(2) : (0, Keycode.F1),
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(3) : (0, Keycode.F2),
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(4) : (0, Keycode.F3),
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(5) : (0, Keycode.F4),
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(6) : (0, Keycode.F5),
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(11) : (0, None),
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(12) : (0, None),
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(13) : (0, None),
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(14) : (0, None),
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(15) : (0, None),
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(16) : (0, None),
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(21) : (0, None),
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(22) : (0, None),
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(23) : (0, None),
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(24) : (0, None),
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(25) : (0, None),
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(26) : (0, None),
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(31) : (0, None),
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(32) : (0, None),
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(33) : (0, None),
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(34) : (0, None),
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(35) : (0, None),
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(36) : (0, None),
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(41) : (0, Keycode.CONTROL),
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(42) : (0, Keycode.GUI),
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(43) : (0, Keycode.ALT),
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(44) : (0, Keycode.GUI),
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(45) : (1, Keycode.L), # lower (the keycode doesn't matter here, it's never typed)
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(46) : (0, Keycode.SPACE)
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}
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km_rt_0 = {
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(1) : (0, Keycode.F6),
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(2) : (0, Keycode.F7),
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(3) : (0, Keycode.F8),
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(4) : (0, Keycode.F9),
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(5) : (0, Keycode.F10),
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(6) : (0, Keycode.F12),
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(11) : (0, Keycode.HOME),
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(12) : (0, Keycode.PAGE_DOWN),
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(13) : (0, Keycode.PAGE_UP),
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(14) : (0, Keycode.END),
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(15) : (0, Keycode.INSERT),
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(16) : (0, Keycode.DELETE),
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(21) : (0, None),
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(22) : (0, None),
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(23) : (0, None),
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(24) : (0, None),
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(25) : (0, None),
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(26) : (0, None),
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(31) : (0, None),
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(32) : (0, None),
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(33) : (0, None),
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(34) : (0, None),
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(35) : (0, None),
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(36) : (0, None),
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(41) : (0, Keycode.SPACE),
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(42) : (2, Keycode.R), # raise
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(43) : (0, Keycode.LEFT_ARROW),
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(44) : (0, Keycode.DOWN_ARROW),
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(45) : (0, Keycode.UP_ARROW),
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(46) : (0, Keycode.RIGHT_ARROW)
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}
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# main keymap layer
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km_lf_1 = {
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(1) : (0, Keycode.GRAVE_ACCENT),
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(2) : (0, Keycode.ONE),
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(3) : (0, Keycode.TWO),
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(4) : (0, Keycode.THREE),
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(5) : (0, Keycode.FOUR),
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(6) : (0, Keycode.FIVE),
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(11) : (0, Keycode.ESCAPE),
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(12) : (0, Keycode.Q),
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(13) : (0, Keycode.W),
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(14) : (0, Keycode.E),
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(15) : (0, Keycode.R),
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(16) : (0, Keycode.T),
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(21) : (0, Keycode.TAB),
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(22) : (0, Keycode.A),
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(23) : (0, Keycode.S),
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(24) : (0, Keycode.D),
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(25) : (0, Keycode.F),
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(26) : (0, Keycode.G),
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(31) : (0, Keycode.SHIFT),
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(32) : (0, Keycode.Z),
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(33) : (0, Keycode.X),
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(34) : (0, Keycode.C),
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(35) : (0, Keycode.V),
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(36) : (0, Keycode.B),
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(41) : (0, Keycode.CONTROL),
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(42) : (0, Keycode.GUI),
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(43) : (0, Keycode.ALT),
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(44) : (0, Keycode.GUI),
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(45) : (1, Keycode.L), # lower
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(46) : (0, Keycode.SPACE)
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}
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km_rt_1 = {
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(1) : (0, Keycode.SIX),
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(2) : (0, Keycode.SEVEN),
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(3) : (0, Keycode.EIGHT),
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(4) : (0, Keycode.NINE),
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(5) : (0, Keycode.ZERO),
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(6) : (0, Keycode.BACKSPACE),
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(11) : (0, Keycode.Y),
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(12) : (0, Keycode.U),
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(13) : (0, Keycode.I),
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(14) : (0, Keycode.O),
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(15) : (0, Keycode.P),
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(16) : (0, Keycode.BACKSLASH),
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(21) : (0, Keycode.H),
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(22) : (0, Keycode.J),
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(23) : (0, Keycode.K),
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(24) : (0, Keycode.L),
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(25) : (0, Keycode.SEMICOLON),
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(26) : (0, Keycode.QUOTE),
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(31) : (0, Keycode.N),
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(32) : (0, Keycode.M),
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(33) : (0, Keycode.COMMA),
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(34) : (0, Keycode.PERIOD),
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(35) : (0, Keycode.FORWARD_SLASH),
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(36) : (0, Keycode.ENTER),
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(41) : (0, Keycode.SPACE),
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(42) : (2, Keycode.R), # raise
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(43) : (0, Keycode.LEFT_ARROW),
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(44) : (0, Keycode.DOWN_ARROW),
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(45) : (0, Keycode.UP_ARROW),
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(46) : (0, Keycode.RIGHT_ARROW)
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}
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# upper keymap layer
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km_lf_2 = {
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(1) : (0, None),
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(2) : (0, None),
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(3) : (0, None),
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(4) : (0, None),
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(5) : (0, None),
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(6) : (0, None),
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(11) : (0, Keycode.ESCAPE),
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(12) : (0, None),
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(13) : (0, None),
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(14) : (0, None),
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(15) : (0, None),
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(16) : (0, None),
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(21) : (0, Keycode.TAB),
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(22) : (0, None),
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(23) : (0, None),
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(24) : (0, Keycode.MINUS),
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(25) : (0, Keycode.EQUALS),
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(26) : (7, Keycode.BACKSLASH), # PIPE '|'
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(31) : (0, Keycode.SHIFT),
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(32) : (0, None),
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(33) : (0, None),
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(34) : (7, Keycode.MINUS), # UNDERSCORE
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(35) : (0, Keycode.KEYPAD_PLUS),
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(36) : (0, Keycode.BACKSLASH),
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(41) : (0, Keycode.CONTROL),
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(42) : (0, Keycode.GUI),
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(43) : (0, Keycode.ALT),
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(44) : (0, Keycode.GUI),
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(45) : (1, Keycode.L), # lower
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(46) : (0, Keycode.SPACE)
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}
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km_rt_2 = {
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(1) : (0, None),
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(2) : (0, None),
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(3) : (0, None),
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(4) : (0, None),
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(5) : (0, None),
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(6) : (0, Keycode.BACKSPACE),
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(11) : (0, None),
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(12) : (0, None),
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(13) : (0, None),
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(14) : (0, None),
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(15) : (0, None),
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(16) : (0, Keycode.BACKSLASH),
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(21) : (0, None),
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(22) : (0, Keycode.LEFT_BRACKET),
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(23) : (0, Keycode.RIGHT_BRACKET),
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(24) : (0, None),
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(25) : (0, None),
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(26) : (0, Keycode.QUOTE),
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(31) : (0, None),
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(32) : (7, Keycode.LEFT_BRACKET),
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(33) : (7, Keycode.RIGHT_BRACKET),
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(34) : (0, None),
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(35) : (0, None),
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(36) : (0, Keycode.ENTER),
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(41) : (0, Keycode.SPACE),
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(42) : (2, Keycode.R), # raise
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(43) : (0, Keycode.LEFT_ARROW),
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(44) : (0, Keycode.DOWN_ARROW),
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(45) : (0, Keycode.UP_ARROW),
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(46) : (0, Keycode.RIGHT_ARROW)
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}
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# put the keymaps in layer lists for easy iteration later
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keymaps_1 = (km_lf_0, km_rt_0)
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keymaps_2 = (km_lf_1, km_rt_1)
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keymaps_3 = (km_lf_2, km_rt_2)
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layer_keymaps = (keymaps_1, keymaps_2, keymaps_3)

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