This readme and most of the code are from https://github.com/ahtn/tmk_keyboard/
**Please note this guide is a heavy work in progress and is based heavily off of the Let's Split guide.
Split keyboard firmware for Arduino Pro Micro or other ATmega32u4
Split keyboard firmware for Arduino Pro Micro or other ATmega32u4
based boards.
based boards.
@ -9,23 +9,20 @@ based boards.
## Build Guide
## Build Guide
A build guide for putting together the Let's Split v2 can be found here: [An Overly Verbose Guide to Building a Let's Split Keyboard](https://github.com/nicinabox/lets-split-guide)
Coming soon!
There is additional information there about flashing and adding RGB underglow.
## First Time Setup
## First Time Setup
Download or clone the whole firmware and navigate to the keyboards/lets_split directory. Once your dev env is setup, you'll be able to generate the default .hex using:
Download or clone the whole firmware and navigate to the keyboards/orthodox directory. Once your dev env is setup, you'll be able to generate the default .hex using:
```
```
$ make rev2
$ make rev1
```
```
You will see a lot of output and if everything worked correctly you will see the built hex files:
You will see a lot of output and if everything worked correctly you will see the built hex files:
```
```
lets_split_rev2_serial.hex
orhtodox_rev1_serial.hex
lets_split_rev2_i2c.hex
```
```
If you would like to use one of the alternative keymaps, or create your own, copy one of the existing [keymaps](keymaps/) and run make like so:
If you would like to use one of the alternative keymaps, or create your own, copy one of the existing [keymaps](keymaps/) and run make like so:
@ -57,9 +54,7 @@ Some features supported by the firmware:
independently.
independently.
* You only need 3 wires to connect the two halves. Two for VCC and GND and one
* You only need 3 wires to connect the two halves. Two for VCC and GND and one
for serial communication.
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
Required Hardware
-----------------
-----------------
@ -71,34 +66,8 @@ will need:
* 2 TRRS sockets and 1 TRRS cable, or 2 TRS sockets and 1 TRS cable
* 2 TRRS sockets and 1 TRRS cable, or 2 TRS sockets and 1 TRS cable
Alternatively, you can use any sort of cable and socket that has at least 3
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
wires.
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/TRRS 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
8 years ago