Add support for encoder mapping. (#13286)

2 files changed, 35 insertions, 1 deletions

diff --git a/docs/feature_encoders.md b/docs/feature_encoders.md
index f71c7e7325..a3d56fd5ef 100644
--- a/docs/feature_encoders.md
+++ b/docs/feature_encoders.md
@@ -67,9 +67,30 @@ Additionally, if one side does not have an encoder, you can specify `{}` for the
 #define ENCODER_RESOLUTIONS_RIGHT { 4 }
 ```
 
+## Encoder map
+
+Encoder mapping may be added to your `keymap.c`, which replicates the normal keyswitch layer handling functionality, but with encoders. Add this to your `rules.mk`:
+
+```make
+ENCODER_MAP_ENABLE = yes
+```
+
+Your `keymap.c` will then need an encoder mapping defined (for four layers and two encoders):
+
+```c
+#if defined(ENCODER_MAP_ENABLE)
+const uint16_t PROGMEM encoder_map[][NUM_ENCODERS][2] = {
+    [_BASE] =   { ENCODER_CCW_CW(KC_MS_WH_UP, KC_MS_WH_DOWN), ENCODER_CCW_CW(KC_VOLD, KC_VOLU)  },
+    [_LOWER] =  { ENCODER_CCW_CW(RGB_HUD, RGB_HUI),           ENCODER_CCW_CW(RGB_SAD, RGB_SAI)  },
+    [_RAISE] =  { ENCODER_CCW_CW(RGB_VAD, RGB_VAI),           ENCODER_CCW_CW(RGB_SPD, RGB_SPI)  },
+    [_ADJUST] = { ENCODER_CCW_CW(RGB_RMOD, RGB_MOD),          ENCODER_CCW_CW(KC_RIGHT, KC_LEFT) },
+};
+#endif
+```
+
 ## Callbacks
 
-The callback functions can be inserted into your `<keyboard>.c`:
+When not using `ENCODER_MAP_ENABLE = yes`, the callback functions can be inserted into your `<keyboard>.c`:
 
 ```c
 bool encoder_update_kb(uint8_t index, bool clockwise) {
diff --git a/docs/feature_swap_hands.md b/docs/feature_swap_hands.md
index 654108ae70..6768020f12 100644
--- a/docs/feature_swap_hands.md
+++ b/docs/feature_swap_hands.md
@@ -31,3 +31,16 @@ Note that the array indices are reversed same as the matrix and the values are o
 |`SH_OS`    |One shot swap hands: toggles while pressed or until next key press.      |
 
 `SH_TT` swap-hands tap-toggle key is similar to [layer tap-toggle](feature_layers.md?id=switching-and-toggling-layers). Tapping repeatedly (5 taps by default) will toggle swap-hands on or off, like `SH_TG`. Tap-toggle count can be changed by defining a value for `TAPPING_TOGGLE`.
+
+## Encoder Mapping
+
+When using an encoder mapping, it's also able to handle swapping encoders between sides, too.
+
+Encoder indexes are defined as left-to-right, and the extent of the array needs to match the number of encoders on the keyboard.
+
+As an example, if a split keyboard has a single encoder per side, you can swap the order by using the following code in your keymap:
+```c
+#if defined(SWAP_HANDS_ENABLE) && defined(ENCODER_MAP_ENABLE)
+const uint8_t PROGMEM encoder_hand_swap_config[NUM_ENCODERS] = { 1, 0 };
+#endif
+```