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README.org Normal file
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# -*- mode: org; coding: utf-8; -*-
#+author: nik gaffney <nik@fo.am>
#+title: QMK config for Charybdis
Charybdis is an ergonomic keyboard using a split 4x6 layout (or 3x5) with 5+3 thumb keys and integrated trackball.
[[file:img/charybdis-4x6.jpg]]
The keyboard can be programmed using [[https://qmk.fm/][QMK]] firmware for the [[https://github.com/Bastardkb/charybdis][charybdis]] (which currently requires the CNano branch of QMK) With the help of [[https://github.com/mihaiolteanu/mugur][mugur]] (and org-mode) this file can be used as a literate config to generate a keymap and the relevant build files for the QMK firmware…
For reference, comparison and reading the [[https://github.com/manna-harbour/qmk_firmware/blob/crkbd/keyboards/crkbd/keymaps/manna-harbour/readme.org][Crkbd Keymap by Manna Harbour]] and [[https://github.com/qmk/qmk_firmware/tree/master/users/drashna][drashna]] provide good examples of detailed configs, and the [[https://github.com/qmk/qmk_firmware/tree/master/keyboards/crkbd/keymaps][QMK tree]] has further specifics with a wide range of examples.
#+caption: alphanumeric, movement and mouse layers
[[file:img/zzkt-charybdis-4x6.png]]
see also [[http://www.keyboard-layout-editor.com/#/gists/d94578d8f4d7e0b961b52790e8c3a367][KLE layers (pt.1)]] and KLE layers (pt.2) etc.
* general principles
This config uses a mulit-layer qwerty layout which has emerged from a combination of writing and programming using emacs (and emacs style keybindings) on macos and linux. The numeric layer has numbers on the home row and shifted symbols on the row above, with commonly used brackets on the lowest row symmetrically between sides. The emacs layer(s) provide both command and prefix keys. The movement layer provides arrows (as WASD and HJKL) and jump keys on the left. When the mouse layer is active the keys above the trackball can be used as mouse buttons. There is a QMK reset key on each half of the keyboard.
* specific mappings
Details of keyboard layout, layers, macros and general confusion can be found in the [[https://docs.qmk.fm/#/][QMK docs]]
*Layers*
- qwerty and modifiers
- numbers, symbols & brackets
- movement. arrows & jump
- emacs layers
- mouse layer
*Trackball*
- mounted on the right half
- uses keys above the trackball as mouse buttons (i.e. =M=, =comma=, and =dot= with qwerty layout)
- sniping, drag_scroll, etc
*Modifiers*
- Left thumb (base layer) Alt/Meta, space and GUI (held) or space (tap) on top row, with Emacs layer and =KC_LAPO= below
- Right thumb (base layer) Tap toggle numeric layer, Enter (tap) or Right GUI (held) on top row and =KC_RAPC= below
The =KC_LAPO= key is Left Alt when held and =(= when tapped, it can be used as =Meta=. The =KC_RAPC= key is Right Alt when held and =)= when tapped, it can be used for accents and non-ascii characters with the international macOS input sources.
The =emacs= layer is activated with Left-thumb (=k45=) and the =hypm= layer can be activated with (=k80=) and can be used to provide the =H-= prefix bindings defined in =.emacs= The =hyper= key seen by emacs can be mapped to =KC_RGUI= rather than the =KC_HYPR= modifier combination (see also the “[[https://github.com/qmk/qmk_firmware/issues/2179][the infamous Apple Fn key]]” for compatibility)
*QMK Reset*
- Left. =k45= & =k30=
- Right. =k70= & =k80=
To create a new layer, start with a blank layer.
#+BEGIN_SRC emacs-lisp :tangle no :results silent :eval no
("blank"
--- --- --- --- --- --- --- --- --- --- --- ---
--- --- --- --- --- --- --- --- --- --- --- ---
--- --- --- --- --- --- --- --- --- --- --- ---
--- --- --- --- --- --- --- --- --- --- --- ---
--- --- --- --- --- -x-
--- --- --- -x-)
#+END_SRC
Details of the =mugur= keycode naming can be found in the documentation of =mugur--symbol=
#+BEGIN_SRC emacs-lisp :tangle no :results silent
(find-function 'mugur--symbol)
#+END_SRC
A complete keymap can be defined within =mugur-mugur= which will generate the required files to build the firmware.
#+name: keymap
#+BEGIN_SRC emacs-lisp :tangle no :results silent :eval query
(require 'mugur)
(let ((mugur-qmk-path "~/code/keyboards/Charybdis/qmk")
(mugur-keyboard-name "bastardkb/charybdis/4x6")
(mugur-layout-name "LAYOUT_split_4x6_5")
(mugur-keymap-name "zzkt")
(mugur-tapping-term 175))
(mugur-mugur
'(("base"
esc 1 2 3 4 5 6 7 8 9 0 bspace
tab q w e r t y u i o p -
C a s d f g h j k l scolon (LT move ?\')
(S up) (LT mouse z) x c v b n m comma dot (LT mouse slash) (LT hypm down)
M space (G spc) (TT numeric) (G ent) -x-
(MO emacs) lapo rapc -x-)
("numeric"
"~" ?\! ?\@ ?\# ?\$ ?\% ?\^ ?\& ?\* _ + bspace
tab ?\! ?\@ ?\# ?\$ ?\% ?\^ ?\& ?\* - = ---
0 1 2 3 4 5 6 7 8 9 0 (LT move ent)
(S left) "`" ?\\ ?\\ ?\{ ?\[ ?\] ?\} comma dot | (S right)
--- --- --- --- enter -x-
(TG mouse) lapo rapc -x-)
("move"
--- M-< --- --- --- --- --- --- --- --- --- ---
--- M-v up --- --- --- --- --- --- --- --- ---
C-a left down right C-e --- left up down right -x- ---
--- M-< C-v M-> --- --- --- --- --- --- --- ---
C S --- --- --- -x-
--- --- --- -x-)
("emacs"
esc --- --- (C-x 0) (C-x 2) (C-x 3) (C-x 4 t) --- --- --- --- ---
--- --- --- (C-x 0) (C-x 2) (C-x 3) (C-x 4 t) --- --- (C-M o) --- ---
--- --- M-% --- --- (H-t) (C-x b) --- --- "λ" --- ---
reset --- M-x C-c --- ?\( ?\) (M-x "magit" ent) --- --- --- ---
--- --- (H-i e) (C-x 8) (MO hypm) -x-
--- --- --- -x-)
("hypm"
x --- --- --- --- ( C-a "* " ) --- --- --- --- --- ---
x --- --- --- --- " - [ ] " --- --- H-i (H-i o) (H-i l) ---
--- --- --- H-d --- " - " --- --- --- --- --- reset
--- --- --- --- --- --- (H-m n) (H-m m) (H-m s) --- --- ---
--- --- --- --- --- -x-
--- --- --- -x-)
("mouse"
--- --- --- --- --- --- --- --- --- --- --- ---
--- "SNIPER_CONFIG" --- --- --- --- --- --- --- --- --- ---
--- "DPI_CONFIG" "DRAG_SCROLL" --- --- --- --- --- "DRAG_SCROLL" --- --- ---
--- --- --- --- --- --- --- btn1 btn2 btn3 --- ---
btn2 btn1 G --- --- -x-
C S --- -x-)
)))
#+END_SRC
an optional base config for Colemak
#+BEGIN_SRC emacs-lisp
("colemak"
esc 1 2 3 4 5 6 7 8 9 0 bspace
tab q w f p g j l u y scolon -
C a r s t d h n e i o (LT move ?\')
(LT S up) z x c v b k m comma dot slash (LT hypm down)
(MO emacs) lapo (G space) ent rapc (TT numeric))
#+END_SRC
** keymap.c
This will generate a =keymap.c= file with =org-babel-tangle= and should be run before the elisp code block for the keymap described above.
#+BEGIN_SRC c :tangle keymap.c
#include QMK_KEYBOARD_H
#include "version.h"
#include "split_util.h"
#+END_SRC
=mugur= will write the keymap and only overwrite the region between these comments.
#+BEGIN_SRC c :tangle keymap.c
// START-MUGUR-REGION
// END-MUGUR-REGION
#+END_SRC
turn on (or off) debug info (check that =CONSOLE_ENABLE= is set accordingly in =rules.mk= )
#+BEGIN_SRC c :tangle keymap.c
void keyboard_post_init_user(void) {
// debug_enable=true;
// debug_matrix=true;
// debug_keyboard=true;
// debug_mouse=true;
}
#+END_SRC
** rules.mk
this will create a =rules.mk= file with some specifics for the Charybdis
#+BEGIN_SRC makefile :tangle rules.mk
# START-MUGUR-REGION
# END-MUGUR-REGION
# MCU name
MCU = atmega32u4
# Bootloader selection
BOOTLOADER = atmel-dfu
SPLIT_KEYBOARD = yes
# uncode
UNICODE_ENABLE = yes
# Build Options
BOOTMAGIC_ENABLE = no # Bootmagic Lite
EXTRAKEY_ENABLE = yes # Audio control and System control
CONSOLE_ENABLE = yes # Console for debug
COMMAND_ENABLE = no # Commands for debug and configuration
NKRO_ENABLE = no # USB Nkey Rollover
# trackball & mousekeys
MOUSEKEY_ENABLE = yes
POINTING_DEVICE_ENABLE = yes
MOUSE_SHARED_EP = no
# enable configuraiton with VIA
VIA_ENABLE = no
# No lighting or audio
SLEEP_LED_ENABLE = no # Breathing sleep LED during USB suspend
BACKLIGHT_ENABLE = no # Enable keyboard backlight functionality
RGBLIGHT_ENABLE = no # Enable keyboard RGB underglow
AUDIO_ENABLE = no # Audio output
RGB_MATRIX_ENABLE = no
# trackpad driver
SRC += drivers/sensors/pmw3360.c
QUANTUM_LIB_SRC += spi_master.c
# enable Link Time Optimization to reduce firmware size
# see also https://thomasbaart.nl/2018/12/01/reducing-firmware-size-in-qmk/
EXTRAFLAGS += -flto
#+END_SRC
** config.h
This will generate a =config.h= file
#+BEGIN_SRC c :tangle config.h
// START-MUGUR-REGION
// END-MUGUR-REGION
#+END_SRC
#+BEGIN_SRC c :tangle config.h
#define EE_HANDS
#+END_SRC
…and some layers
#+BEGIN_SRC c :tangle config.h
#define DYNAMIC_KEYMAP_LAYER_COUNT 6
#+END_SRC
taping timing and tap/hold (as seen in the [[https://beta.docs.qmk.fm/using-qmk/software-features/tap_hold][QMK docs]])
#+BEGIN_SRC c :tangle config.h
#define TAPPING_TERM 175
#define COMBO_TERM 300
#define PERMISSIVE_HOLD
#+END_SRC
Unicode input method (tangle as required)
#+BEGIN_SRC c :tangle config.h
#define UNICODE_SELECTED_MODES UC_MAC
#+END_SRC
#+BEGIN_SRC c :tangle no
#define UNICODE_SELECTED_MODES UC_LNX, UC_MAC
#+END_SRC
The mouse layer can activate auotosniping
#+BEGIN_SRC c :tangle config.h
#undef CHARYBDIS_AUTO_SNIPER_LAYER
#define CHARYBDIS_AUTO_SNIPER_LAYER 5
#+END_SRC
for VIA compatibility (if needed)
#+BEGIN_SRC text
VENDOR_ID 0x43256
PRODUCT_ID 0x6195
#+END_SRC
** build (generate, compile and flash cycle)
first tangle this file
#+BEGIN_SRC emacs-lisp :tangle no :results silent
(org-babel-tangle)
#+END_SRC
then write the keymap as defined above
#+BEGIN_SRC emacs-lisp :noweb yes :tangle no :results silent
<<keymap()>>
#+END_SRC
then compile and/or write to the keyboard
#+name: qmk
#+BEGIN_SRC shell :dir ~/qmk_firmware :wrap SRC text :results raw :tangle no
qmk compile -kb bastardkb/charybdis/4x6 -km zzkt
#+END_SRC
flash the firmware one side at a time. if =EE_HANDS= is enabled, the same command can be used for both sides.
#+name: qmk
#+BEGIN_SRC shell :dir ~/qmk_firmware :wrap SRC text :results raw :tangle no
qmk flash -kb bastardkb/charybdis/4x6 -km zzkt -bl dfu
#+END_SRC
without =EE_HANDS= or to set handedness the first time…
#+name: qmk
#+BEGIN_SRC shell :dir ~/qmk_firmware :wrap SRC text :results raw :tangle no
qmk flash -km zzkt -bl dfu-split-left
#+END_SRC
#+name: qmk
#+BEGIN_SRC shell :dir ~/qmk_firmware wrap SRC text :results raw :tangle no
qmk flash -km zzkt -bl dfu-split-right
#+END_SRC
* further
- [[https://config.qmk.fm/#/crkbd/rev1/common/LAYOUT_split_3x6_3][QMK Configurator]] (for crkbd)
- [[https://josef-adamcik.cz/electronics/corne-keyboard-build-log.html][Build log - Josef Adamčík]]
- [[https://thomasbaart.nl/2018/11/26/corne-keyboard-helidox-build-log/][Build log - Thomas Baart]]
- [[https://en.wikipedia.org/wiki/Keyboard_layout][Keyboard Layouts]] (wikipedia)

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#define EE_HANDS
#define DYNAMIC_KEYMAP_LAYER_COUNT 6
#define TAPPING_TERM 175
#define COMBO_TERM 300
#define PERMISSIVE_HOLD
#define UNICODE_SELECTED_MODES UC_MAC
#undef CHARYBDIS_AUTO_SNIPER_LAYER
#define CHARYBDIS_AUTO_SNIPER_LAYER 5

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data/zzkt-charybdis-4x6.json Normal file
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[
{
"name": "Charybdis 4x6",
"author": "https://github.com/zzkt/charybdis",
"notes": "layers\n0 - base layer. qwerty and modifiers\n1 - numbers, symbols & brackets\n2 - movement. arrows & jump\n3 - emacs layer\n4 - emacs layer (hypm)\n5 - mouse layer\n"
},
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{
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"$\n\n\n\n\n\n4",
{
"x": 5
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"&\n\n\n\n\n\n7",
{
"x": 1,
"t": "#000000\n\n\n#dd3c84",
"a": 4
},
"\n\n\n_\n\n\n\n\n(\n9"
],
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{
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{
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{
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{
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"\n\n\n+\n\n\n\n\n)\n0",
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{
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"\n\n\n&\n\n\n\n\n\nU",
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"\n\n\n%\n\n\n\n\n\nT",
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"fa": [
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"\n\n\n=\n\n\n\n+\n\nP",
{
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{
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[
{
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{
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{
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[
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{
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"\n◀︎\n\n1\nsniper\n\n\n\n\nA",
{
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[
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"\nM <\n\n\\\n\n\n\n\n\nC",
{
"x": 7,
"t": "#000000\n\n\n\n#2022e2",
"a": 5,
"f": 3
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"<\n\n\n\nMaus 2\n\n,"
],
[
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"a": 4,
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"\nC-v\n\n\\\n\n\n\n\n\nX",
{
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"t": "#000000\n\n\n#dd3c84",
"f": 3
},
"\n\n\n{\n\n\n\n\n\nV",
{
"x": 5,
"t": "#000000\n\n\n#dd3c84\n#2022e2",
"f": 3
},
"\n\n\n}\nMaus 1\n\n\n\n\nM",
{
"x": 1,
"t": "#000000\n\n\n\n#2022e2",
"a": 5,
"f": 3
},
">\n\n\n\nMaus 3\n\n."
],
[
{
"y": -0.875,
"x": 5.5,
"t": "#000000\n\n\n#dd3c84",
"a": 4,
"f": 3
},
"\n\n\n[\n\n\n\n\n\nB",
{
"x": 3,
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},
"\n\n\n]\n\n\n\n\n\nN"
],
[
{
"y": -0.875,
"x": 0.5,
"t": "#000000",
"a": 5,
"f": 3
},
"\n▲\n\n\n\n\nShift",
{
"t": "#000000\n#1c937f\n\n#dd3c84\n\n#2022e2",
"a": 0,
"fa": [
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]
},
"\nM <\n\n`\n\n●\n\n\n\nZ",
{
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"t": "#000000\n\n\n#dd3c84\n\n#2022e2",
"f": 3
},
"\n\n\n|\n\n●\n\n\n?\n/",
{
"t": "#000000",
"a": 5,
"fa": [
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0,
4,
5,
0,
0,
2
]
},
"\n▼\n\n\n\n\n(LT 4)"
],
[
{
"y": 0.125,
"x": 11.25,
"c": "#f9f9f9",
"fa": [
4,
0,
4,
5,
0,
0,
9
],
"w": 1.25,
"h": 1.25,
"d": true
},
"\n(trackball)\n\n\n\n\n🔮"
],
[
{
"r": 30,
"rx": 6.5,
"ry": 4.25,
"y": 0.75,
"x": -1.25,
"c": "#cccccc",
"t": "#000000\n#1c937f\n\n\n#2022e2",
"a": 4,
"fa": [
4,
2
]
},
"\nctrl\n\n\nMaus 2\n\n\n\n\nmeta",
"\nshift\n\n\nMaus 1\n\n\n\n\nspc",
{
"t": "#000000\n\n\n\n#2022e2",
"a": 7,
"fa": [
2
]
},
"(⌘ spc)\n\n\n\nMaus 3"
],
[
{
"x": -0.25,
"t": "#000000"
},
"(MO 3)",
{
"f": 3
},
"lapo"
],
[
{
"r": -30,
"rx": 13,
"y": -1,
"x": -4.75,
"t": "#000000\n\n\n#dd3c84",
"a": 4,
"fa": [
2,
0,
0,
5
]
},
"\n\n\n●",
{
"t": "#000000",
"a": 7,
"f": 3
},
"(⌘ ↵)"
],
[
{
"x": -4.75,
"f": 3
},
"rapc"
]
]

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1
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37
rules.mk Normal file
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@ -0,0 +1,37 @@
# MCU name
MCU = atmega32u4
# Bootloader selection
BOOTLOADER = atmel-dfu
SPLIT_KEYBOARD = yes
# uncode
UNICODE_ENABLE = yes
# Build Options
BOOTMAGIC_ENABLE = no # Bootmagic Lite
EXTRAKEY_ENABLE = no # Audio control and System control
CONSOLE_ENABLE = no # Console for debug
COMMAND_ENABLE = no # Commands for debug and configuration
NKRO_ENABLE = no # USB Nkey Rollover
# trackball & mousekeys
MOUSEKEY_ENABLE = yes # Mouse keys
POINTING_DEVICE_ENABLE = yes
MOUSE_SHARED_EP = no
# enable configuraiton with VIA
VIA_ENABLE = no
# No lighting or audio
SLEEP_LED_ENABLE = no # Breathing sleep LED during USB suspend
BACKLIGHT_ENABLE = no # Enable keyboard backlight functionality
RGBLIGHT_ENABLE = no # Enable keyboard RGB underglow
AUDIO_ENABLE = no # Audio output
RGB_MATRIX_ENABLE = no
SRC += drivers/sensors/pmw3360.c
QUANTUM_LIB_SRC += spi_master.c
EXTRAFLAGS += -flto