Add keybind to change RGB effect

keymaps/custom/config.h

@@ -0,0 +1,42 @@
+#pragma once
+
+// Enable framebuffer effects (typing heatmap, digital rain)
+#define RGB_MATRIX_FRAMEBUFFER_EFFECTS
+
+// Standard effects (no additional defines needed)
+#define ENABLE_RGB_MATRIX_ALPHAS_MODS
+#define ENABLE_RGB_MATRIX_GRADIENT_UP_DOWN
+#define ENABLE_RGB_MATRIX_GRADIENT_LEFT_RIGHT
+#define ENABLE_RGB_MATRIX_BREATHING
+#define ENABLE_RGB_MATRIX_BAND_SAT
+#define ENABLE_RGB_MATRIX_BAND_VAL
+#define ENABLE_RGB_MATRIX_BAND_PINWHEEL_SAT
+#define ENABLE_RGB_MATRIX_BAND_PINWHEEL_VAL
+#define ENABLE_RGB_MATRIX_BAND_SPIRAL_SAT
+#define ENABLE_RGB_MATRIX_BAND_SPIRAL_VAL
+#define ENABLE_RGB_MATRIX_DUAL_BEACON
+#define ENABLE_RGB_MATRIX_RAINBOW_BEACON
+#define ENABLE_RGB_MATRIX_RAINBOW_PINWHEELS
+#define ENABLE_RGB_MATRIX_JELLYBEAN_RAINDROPS
+#define ENABLE_RGB_MATRIX_HUE_BREATHING
+#define ENABLE_RGB_MATRIX_HUE_PENDULUM
+#define ENABLE_RGB_MATRIX_HUE_WAVE
+#define ENABLE_RGB_MATRIX_PIXEL_FRACTAL
+#define ENABLE_RGB_MATRIX_PIXEL_FLOW
+#define ENABLE_RGB_MATRIX_PIXEL_RAIN
+
+// Framebuffer effects (require RGB_MATRIX_FRAMEBUFFER_EFFECTS)
+#define ENABLE_RGB_MATRIX_TYPING_HEATMAP
+#define ENABLE_RGB_MATRIX_DIGITAL_RAIN
+
+// Reactive effects (require RGB_MATRIX_KEYPRESSES, already enabled in board config)
+#define ENABLE_RGB_MATRIX_SOLID_REACTIVE_SIMPLE
+#define ENABLE_RGB_MATRIX_SOLID_REACTIVE
+#define ENABLE_RGB_MATRIX_SOLID_REACTIVE_WIDE
+#define ENABLE_RGB_MATRIX_SOLID_REACTIVE_MULTIWIDE
+#define ENABLE_RGB_MATRIX_SOLID_REACTIVE_CROSS
+#define ENABLE_RGB_MATRIX_SOLID_REACTIVE_MULTICROSS
+#define ENABLE_RGB_MATRIX_SOLID_REACTIVE_NEXUS
+#define ENABLE_RGB_MATRIX_SOLID_REACTIVE_MULTINEXUS
+#define ENABLE_RGB_MATRIX_SOLID_SPLASH
+#define ENABLE_RGB_MATRIX_SOLID_MULTISPLASH

keymaps/custom/keymap.c

@@ -3,8 +3,13 @@
 #include "dynamic_keymap.h"
 #include "os_mode.h"
 
+// System76 per-layer RGB state (defined in system76_ec.c, declared in launch_3.c)
+extern rgb_config_t layer_rgb[];
+void system76_ec_rgb_eeprom(bool write);
+
 enum custom_keycodes {
     CK_OSMODE = SAFE_RANGE, // cycle OS mode
+    CK_RGBMOD,                // cycle RGB animation
 };
 
 typedef struct {
@@ -100,8 +105,8 @@ ________________________________________________________________________________
 | PRINT  |        |        |        |        |        |        |        |        |        |        |        |        |            ||        |
 | SCREEN |  MUTE  | VOL DN | VOL UP |        |        |        |        |        |        |        |        |        |  OS MODE   ||        |
 |________|________|________|________|________|________|________|________|________|________|________|________|________|____________||________|
-|        | PLAY/  |        |        |        |        |        |        |        |        |  LED   |  LED   |  LED   |            ||        |
+|        | PLAY/  |        |        |        |        |        |        |        |        |  LED   |  LED   |  LED   |    LED     ||        |
-|        | PAUSE  |  PREV  |  NEXT  |        |        |        |        |        |        | TOGGLE |  DOWN  |  UP    |            ||        |
+|        | PAUSE  |  PREV  |  NEXT  |        |        |        |        |        |        | TOGGLE |  DOWN  |  UP    |    MODE    ||        |
 |________|________|________|________|________|________|________|________|________|________|________|________|________|____________||________|
 |            |        |        |        |        |        |        |        |        |        |        |        |        |        ||        |
 |            |        |        |        |        |        |        |        |        |        |        |        |        |        ||        |
@@ -119,7 +124,7 @@ ________________________________________________________________________________
 
   [1] = LAYOUT(
     KC_PSCR, KC_MUTE, KC_VOLD, KC_VOLU, KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   CK_OSMODE, KC_NO,
-    KC_NO,   KC_MPLY, KC_MPRV, KC_MNXT, KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   RGB_TOG, RGB_VAD, RGB_VAI, KC_NO,       KC_NO,
+    KC_NO,   KC_MPLY, KC_MPRV, KC_MNXT, KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   RGB_TOG, RGB_VAD, RGB_VAI, CK_RGBMOD,   KC_NO,
         KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,
           KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,      KC_NO,       KC_NO,
               KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,   KC_NO,      KC_NO,    KC_PGUP,
@@ -172,6 +177,20 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
         return false;
     }
 
+    // Cycle RGB animation (FN+Backspace)
+    // Must update layer_rgb for all layers because system76_ec_rgb_layer()
+    // resets rgb_matrix_config from layer_rgb on every layer change.
+    if (keycode == CK_RGBMOD) {
+        if (record->event.pressed) {
+            uint8_t mode = layer_rgb[0].mode + 1;
+            if (mode >= RGB_MATRIX_EFFECT_MAX) mode = 1;
+            layer_rgb[0].mode = mode;
+            rgb_matrix_mode_noeeprom(mode);
+            system76_ec_rgb_eeprom(true);
+        }
+        return false;
+    }
+
     // No rewrites in none mode
     if (os_mode == OS_MODE_NONE) return true;
 

keymaps/custom/os_detect.c

@@ -4,6 +4,9 @@
 
 #include "os_mode.h"
 
+// System76 per-layer RGB state (no header available)
+void system76_ec_rgb_layer(layer_state_t layer_state);
+
 os_mode_t os_mode = OS_MODE_NONE;
 bool os_mode_manual = false;
 static bool os_detected = false;
@@ -45,6 +48,6 @@ void matrix_scan_user(void) {
     // Restore default RGB animation after 500ms indicator flash
     if (flash_start && timer_elapsed32(flash_start) > 500) {
         flash_start = 0;
-        rgb_matrix_reload_from_eeprom();
+        system76_ec_rgb_layer(layer_state);
     }
 }