From c255174cf3e55483f14351a69689e24e849445a0 Mon Sep 17 00:00:00 2001
From: Dasky <32983009+daskygit@users.noreply.github.com>
Date: Thu, 6 Oct 2022 10:52:42 +0100
Subject: Implement split comms watchdog (#18599)

---
 docs/config_options.md         |  7 +++++++
 docs/feature_split_keyboard.md | 11 +++++++++++
 2 files changed, 18 insertions(+)

(limited to 'docs')

diff --git a/docs/config_options.md b/docs/config_options.md
index 3e322e590a..a6ceb199de 100644
--- a/docs/config_options.md
+++ b/docs/config_options.md
@@ -325,6 +325,13 @@ There are a few different ways to set handedness for split keyboards (listed in
 
 * `#define SPLIT_USB_TIMEOUT_POLL 10`
   * Poll frequency when detecting master/slave when using `SPLIT_USB_DETECT`
+  
+* `#define SPLIT_WATCHDOG_ENABLE`
+  * Reboot slave if no communication from master within timeout.
+  * Helps resolve issue where both sides detect as slave using `SPLIT_USB_DETECT`
+
+* `#define SPLIT_WATCHDOG_TIMEOUT 3000`
+  * Maximum slave timeout when waiting for communication from master when using `SPLIT_WATCHDOG_ENABLE`
 
 * `#define FORCED_SYNC_THROTTLE_MS 100`
   * Deadline for synchronizing data from master to slave when using the QMK-provided split transport.
diff --git a/docs/feature_split_keyboard.md b/docs/feature_split_keyboard.md
index e53b3525cb..7d194284d6 100644
--- a/docs/feature_split_keyboard.md
+++ b/docs/feature_split_keyboard.md
@@ -422,6 +422,17 @@ This sets the maximum timeout when detecting master/slave when using `SPLIT_USB_
 ```
 This sets the poll frequency when detecting master/slave when using `SPLIT_USB_DETECT`
 
+```c
+#define SPLIT_WATCHDOG_ENABLE
+```
+
+This will enable a software watchdog on any side delegated as slave and will reboot the keyboard if no successful communication occurs within `SPLIT_WATCHDOG_TIMEOUT`. This can be particularly helpful when `SPLIT_USB_DETECT` delegates both sides as slave in some circumstances.
+
+```c
+#define SPLIT_WATCHDOG_TIMEOUT 3000
+```
+This set the maximum slave timeout when waiting for communication from master when using `SPLIT_WATCHDOG_ENABLE`
+
 ## Hardware Considerations and Mods
 
 Master/slave delegation is made either by detecting voltage on VBUS connection or waiting for USB communication (`SPLIT_USB_DETECT`). Pro Micro boards can use VBUS detection out of the box and be used with or without `SPLIT_USB_DETECT`.
-- 
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