jordan
/
qmk_firmware
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
master
rgb_matrix
planck_rev6
error_log_cleanup
info_json_docs
info_json_updates
keycode_versioning
readme-update
cb2x1800
new_project_fix
moxygen
clueboard_hotswap
handwire
twi2c
arm_audio_fixes
xmega_support
audio_out
gb_port
clueboard_1
info_json_populate
pjrc_hid
subvendor_ids
stm32l476
docs
matrix_update
ps2avrgb
travis_phases
dz_support
make_autocomplete
hid_api
clueboard_arm
sid
keyboards_json
keyboard_identifiers
pp_definitions
teensy_lc_synth
eeprom_update
process_keycode_update
b6_b7_audio
example_keyboards
preonic-1.0
planck-4.0
preonic-2.0
planck-5.0
planck-4.2
planck-4.1
ergodox_ez-161205
0.6.9
0.6.8
0.6.7
0.6.6
0.6.5
0.6.4
0.6.3
0.6.20
0.6.2
0.6.19
0.6.18
0.6.17
0.6.16
0.6.15
0.6.14
0.6.13
0.6.12
0.6.11
0.6.10
0.6.1
0.6.0
0.5.99
0.5.98
0.5.97
0.5.96
0.5.95
0.5.94
0.5.93
0.5.92
0.5.91
0.5.90
0.5.9
0.5.89
0.5.88
0.5.87
0.5.86
0.5.85
0.5.84
0.5.83
0.5.82
0.5.81
0.5.80
0.5.8
0.5.79
0.5.78
0.5.77
0.5.76
0.5.75
0.5.74
0.5.73
0.5.72
0.5.71
0.5.70
0.5.7
0.5.69
0.5.68
0.5.67
0.5.66
0.5.65
0.5.64
0.5.63
0.5.62
0.5.61
0.5.60
0.5.6
0.5.59
0.5.58
0.5.57
0.5.56
0.5.55
0.5.54
0.5.53
0.5.52
0.5.51
0.5.50
0.5.5
0.5.49
0.5.48
0.5.47
0.5.46
0.5.45
0.5.44
0.5.43
0.5.42
0.5.41
0.5.40
0.5.4
0.5.39
0.5.38
0.5.37
0.5.36
0.5.35
0.5.34
0.5.33
0.5.32
0.5.31
0.5.30
0.5.3
0.5.29
0.5.28
0.5.27
0.5.264
0.5.263
0.5.262
0.5.261
0.5.260
0.5.26
0.5.259
0.5.258
0.5.257
0.5.256
0.5.255
0.5.254
0.5.253
0.5.252
0.5.251
0.5.250
0.5.25
0.5.249
0.5.248
0.5.247
0.5.246
0.5.245
0.5.244
0.5.243
0.5.242
0.5.241
0.5.240
0.5.24
0.5.239
0.5.238
0.5.237
0.5.236
0.5.235
0.5.234
0.5.233
0.5.232
0.5.231
0.5.230
0.5.23
0.5.229
0.5.228
0.5.227
0.5.226
0.5.225
0.5.224
0.5.223
0.5.222
0.5.221
0.5.220
0.5.22
0.5.219
0.5.218
0.5.217
0.5.216
0.5.215
0.5.214
0.5.213
0.5.212
0.5.211
0.5.210
0.5.21
0.5.209
0.5.208
0.5.207
0.5.206
0.5.205
0.5.204
0.5.203
0.5.202
0.5.201
0.5.200
0.5.20
0.5.2
0.5.199
0.5.198
0.5.197
0.5.196
0.5.195
0.5.194
0.5.193
0.5.192
0.5.191
0.5.190
0.5.189
0.5.188
0.5.187
0.5.186
0.5.185
0.5.184
0.5.183
0.5.182
0.5.181
0.5.180
0.5.179
0.5.178
0.5.177
0.5.176
0.5.175
0.5.174
0.5.173
0.5.172
0.5.171
0.5.170
0.5.17
0.5.169
0.5.168
0.5.167
0.5.166
0.5.165
0.5.164
0.5.163
0.5.162
0.5.161
0.5.160
0.5.16
0.5.159
0.5.158
0.5.157
0.5.156
0.5.155
0.5.154
0.5.153
0.5.152
0.5.151
0.5.150
0.5.15
0.5.149
0.5.148
0.5.147
0.5.146
0.5.145
0.5.144
0.5.143
0.5.142
0.5.141
0.5.140
0.5.14
0.5.139
0.5.138
0.5.137
0.5.136
0.5.135
0.5.134
0.5.133
0.5.132
0.5.131
0.5.130
0.5.13
0.5.129
0.5.128
0.5.127
0.5.126
0.5.125
0.5.124
0.5.123
0.5.122
0.5.121
0.5.120
0.5.12
0.5.119
0.5.118
0.5.117
0.5.116
0.5.115
0.5.114
0.5.113
0.5.112
0.5.111
0.5.110
0.5.11
0.5.109
0.5.108
0.5.107
0.5.106
0.5.105
0.5.104
0.5.103
0.5.102
0.5.101
0.5.100
0.5.10
0.5.1
0.5.0
Branches Tags
${ item.name }
Create tag ${ searchTerm }
Create branch ${ searchTerm }
from 'b26ded3ab1'
${ noResults }
qmk_firmware/keyboards/lets_split
History
Fred Sundvik 44441de8ca Split keyboard makefiles into rules and Makefile 8 years ago
..
imgs images, docks, clean-up [skip ci] 9 years ago
keymaps/default default keymap, reset sorted out for now, added serial to makefile 9 years ago
Makefile Split keyboard makefiles into rules and Makefile 8 years ago
config.h Fixes midi functionality 9 years ago
eeprom-lefthand.eep adds eep, removes usbconfig.h 9 years ago
eeprom-righthand.eep adds eep, removes usbconfig.h 9 years ago
i2c.c i2c working 9 years ago
i2c.h i2c working 9 years ago
lets_split.c default keymap, reset sorted out for now, added serial to makefile 9 years ago
lets_split.h default keymap, reset sorted out for now, added serial to makefile 9 years ago
matrix.c images, docks, clean-up [skip ci] 9 years ago
pro_micro.h i2c working 9 years ago
readme.md images, docks, clean-up [skip ci] 9 years ago
rules.mk Split keyboard makefiles into rules and Makefile 8 years ago
serial.c images, docks, clean-up [skip ci] 9 years ago
serial.h images, docks, clean-up [skip ci] 9 years ago
split_util.c images, docks, clean-up [skip ci] 9 years ago
split_util.h images, docks, clean-up [skip ci] 9 years ago

readme.md

Let's Split

This readme and most of the code are from https://github.com/ahtn/tmk_keyboard/

Split keyboard firmware for Arduino Pro Micro or other ATmega32u4 based boards.

Features

Some features supported by the firmware:

  • Either half can connect to the computer via USB, or both halves can be used independently.
  • You only need 3 wires to connect the two halves. Two for VCC and GND and one for serial communication.
  • Optional support for I2C connection between the two halves if for some reason you require a faster connection between the two halves. Note this requires an extra wire between halves and pull-up resistors on the data lines.

Required Hardware

Apart from diodes and key switches for the keyboard matrix in each half, you will need:

  • 2 Arduino Pro Micro's. You can find theses on aliexpress for ≈3.50USD each.
  • 2 TRS sockets
  • 1 TRS cable.

Alternatively, you can use any sort of cable and socket that has at least 3 wires. If you want to use I2C to communicate between halves, you will need a cable with at least 4 wires and 2x 4.7kΩ pull-up resistors

Optional Hardware

A speaker can be hooked-up to either side to the 5 (C6) pin and GND, and turned on via AUDIO_ENABLE.

Wiring

The 3 wires of the TRS cable need to connect GND, VCC, and digital pin 3 (i.e. PD0 on the ATmega32u4) between the two Pro Micros.

Then wire your key matrix to any of the remaining 17 IO pins of the pro micro and modify the matrix.c accordingly.

The wiring for serial:

serial wiring

The wiring for i2c:

i2c wiring

The pull-up resistors may be placed on either half. It is also possible to use 4 resistors and have the pull-ups in both halves, but this is unnecessary in simple use cases.

Notes on Software Configuration

Configuring the firmware is similar to any other TMK project. One thing to note is that MATIX_ROWS in config.h is the total number of rows between the two halves, i.e. if your split keyboard has 4 rows in each half, then MATRIX_ROWS=8.

Also the current implementation assumes a maximum of 8 columns, but it would not be very difficult to adapt it to support more if required.

Flashing

If you define EE_HANDS in your config.h, you will need to set the EEPROM for the left and right halves. The EEPROM is used to store whether the half is left handed or right handed. This makes it so that the same firmware file will run on both hands instead of having to flash left and right handed versions of the firmware to each half. To flash the EEPROM file for the left half run:

make eeprom-left

and similarly for right half

make eeprom-right

After you have flashed the EEPROM for the first time, you then need to program the flash memory:

make program

Note that you need to program both halves, but you have the option of using different keymaps for each half. You could program the left half with a QWERTY layout and the right half with a Colemak layout. Then if you connect the left half to a computer by USB the keyboard will use QWERTY and Colemak when the right half is connected.