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Feature: Full-Duplex Wired Split (#2766)

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refactor(split): Refactor split code for extension

Extract central/peripheral code to allow for plugging in alternate
transports, instead of tying all split logic to BT.

feat(split): Add full-duplex wired split support

* Depends on full-duplex hardware UART for communication.
* Supports all existing central commands/peripheral events, including
  sensors/inputs from peripherals.
* Only one wired split peripheral supported (for now)
* Relies on chosen `zmk,split-uart` referencing the UART device.

docs: Add wired split config docs.

Migrate split to its own dedicated config file, and add details
on wired split config.

Co-authored-by: Nicolas Munnich <98408764+Nick-Munnich@users.noreply.github.com>

fix: Properly override stack size on RP2040

Move the system work queue stack size override on RP2040 ouf of
a `ZMK_BLE` conditional so it is properly applied generally for that
SoC.

---------

Co-authored-by: Nicolas Munnich <98408764+Nick-Munnich@users.noreply.github.com>
This commit is contained in:
Pete Johanson
2025-03-18 00:48:32 -06:00
committed by GitHub
parent 5ba7e260f4
commit 147c340c6e
44 changed files with 2201 additions and 373 deletions
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21
docs/docs/config/system.md
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@@ -115,27 +115,6 @@ Note that `CONFIG_BT_MAX_CONN` and `CONFIG_BT_MAX_PAIRED` should be set to the s
| `CONFIG_ZMK_USB_LOGGING` | bool | Enable USB CDC ACM logging for debugging | n |
| `CONFIG_ZMK_LOG_LEVEL` | int | Log level for ZMK debug messages | 4 |
### Split keyboards
Following [split keyboard](../features/split-keyboards.md) settings are defined in [zmk/app/src/split/Kconfig](https://github.com/zmkfirmware/zmk/blob/main/app/src/split/Kconfig) (generic) and [zmk/app/src/split/bluetooth/Kconfig](https://github.com/zmkfirmware/zmk/blob/main/app/src/split/bluetooth/Kconfig) (bluetooth).
| Config | Type | Description | Default |
| ------------------------------------------------------- | ---- | -------------------------------------------------------------------------- | ------------------------------------------ |
| `CONFIG_ZMK_SPLIT` | bool | Enable split keyboard support | n |
| `CONFIG_ZMK_SPLIT_ROLE_CENTRAL` | bool | `y` for central device, `n` for peripheral | |
| `CONFIG_ZMK_SPLIT_PERIPHERAL_HID_INDICATORS` | bool | Enable split keyboard support for passing indicator state to peripherals | n |
| `CONFIG_ZMK_SPLIT_BLE` | bool | Use BLE to communicate between split keyboard halves | y |
| `CONFIG_ZMK_SPLIT_BLE_CENTRAL_PERIPHERALS` | int | Number of peripherals that will connect to the central | 1 |
| `CONFIG_ZMK_SPLIT_BLE_CENTRAL_BATTERY_LEVEL_FETCHING` | bool | Enable fetching split peripheral battery levels to the central side | n |
| `CONFIG_ZMK_SPLIT_BLE_CENTRAL_BATTERY_LEVEL_PROXY` | bool | Enable central reporting of split battery levels to hosts | n |
| `CONFIG_ZMK_SPLIT_BLE_CENTRAL_BATTERY_LEVEL_QUEUE_SIZE` | int | Max number of battery level events to queue when received from peripherals | `CONFIG_ZMK_SPLIT_BLE_CENTRAL_PERIPHERALS` |
| `CONFIG_ZMK_SPLIT_BLE_CENTRAL_POSITION_QUEUE_SIZE` | int | Max number of key state events to queue when received from peripherals | 5 |
| `CONFIG_ZMK_SPLIT_BLE_CENTRAL_SPLIT_RUN_STACK_SIZE` | int | Stack size of the BLE split central write thread | 512 |
| `CONFIG_ZMK_SPLIT_BLE_CENTRAL_SPLIT_RUN_QUEUE_SIZE` | int | Max number of behavior run events to queue to send to the peripheral(s) | 5 |
| `CONFIG_ZMK_SPLIT_BLE_PERIPHERAL_STACK_SIZE` | int | Stack size of the BLE split peripheral notify thread | 756 |
| `CONFIG_ZMK_SPLIT_BLE_PERIPHERAL_PRIORITY` | int | Priority of the BLE split peripheral notify thread | 5 |
| `CONFIG_ZMK_SPLIT_BLE_PERIPHERAL_POSITION_QUEUE_SIZE` | int | Max number of key state events to queue to send to the central | 10 |
## Snippets
:::danger