Add VIA support to MxSS, plus minor tweaks (#7809)

* Add VIA support to mxss and general cleanup

* Add support for RGB test for FLEDs

* Add LAYOUT_all to allow for more configuration

* Remove blank layers

* Updated readme

* Improve use of EEPROM

* Credit where its due

* Use the latest iteration of rgblight code

* Keep the RGB timer running if the front LED is in RGB mode

* Fix RGB breathing animation

* Better supported RGB animation
Only thing not working is alternating, but that's not too important

* Abstract front LED handlers from main kb code

* Add support for indicator LED color changing

* Remove debug statement

* Persist indicator LED colors

* Mark custom sections in rgblight.c

* Light commenting

* Fix up keymaps

* Add/update comments

* Remove bloat from default hex

* Tidy a stray tab

* Out with the old, in with the new

* Out with the old, in with the new

* Add LAYER_STATE_8BIT for VIA keymap

14 files changed, 1687 insertions, 965 deletions

diff --git a/keyboards/mxss/config.h b/keyboards/mxss/config.h
index 812f301d6f..264caec970 100644
--- a/keyboards/mxss/config.h
+++ b/keyboards/mxss/config.h
@@ -21,12 +21,12 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "config_common.h"
 
 /* USB Device descriptor parameter */
-#define VENDOR_ID       0xFEED
-#define PRODUCT_ID      0x6060
+#define VENDOR_ID       0x4D78 // "Mx" -> MxBlue
+#define PRODUCT_ID      0x5353 // "SS" -> MxSS
 #define DEVICE_VER      0x0001
 #define MANUFACTURER    MxBlue
 #define PRODUCT         MxSS
-#define DESCRIPTION     Custom Polycarb Keyboard
+#define DESCRIPTION     MxSS Polycarb Keyboard
 
 /* key matrix size */
 #define MATRIX_ROWS 5
@@ -56,6 +56,13 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 /* Locking resynchronize hack */
 #define LOCKING_RESYNC_ENABLE
 
+// Just for posterity, define bootlite matrix pos
+#define BOOTMAGIC_LITE_ROW 0
+#define BOOTMAGIC_LITE_COLUMN 0
+
+// FLED config takes up 1 byte, stored color count takes 1, stored colors take up to 8
+#define VIA_EEPROM_CUSTOM_CONFIG_SIZE 10
+
 /* If defined, GRAVE_ESC will always act as ESC when CTRL is held.
  * This is userful for the Windows task manager shortcut (ctrl+shift+esc).
  */
diff --git a/keyboards/mxss/keymaps/default/keymap.c b/keyboards/mxss/keymaps/default/keymap.c
index 17cebe0c8f..b69d91df9d 100644
--- a/keyboards/mxss/keymaps/default/keymap.c
+++ b/keyboards/mxss/keymaps/default/keymap.c
@@ -15,31 +15,32 @@
  */
 #include QMK_KEYBOARD_H
 
+hs_set caps_color = { .hue = 0, .sat = 255 };
+
 // Colors for layers
 // Format: {hue, saturation}
 // {0, 0} to turn off the LED
 // Add additional rows to handle more layers
-const hs_set layer_colors[] = {
-    [0] = {0,     0},  // Color for Layer 0
-    [1] = {86,    255},  // Color for Layer 1
-    [2] = {36,    255},  // Color for Layer 2
-    [3] = {185,   255},  // Color for Layer 3
+hs_set layer_colors[4] = {
+    [0] = {.hue = 0,     .sat = 0},  // Color for Layer 0
+    [1] = {.hue = 86,    .sat = 255},  // Color for Layer 1
+    [2] = {.hue = 36,    .sat = 255},  // Color for Layer 2
+    [3] = {.hue = 185,   .sat = 255},  // Color for Layer 3
 };
-const size_t lc_size = sizeof(layer_colors) / sizeof(uint16_t);
+size_t lc_size = sizeof(layer_colors) / sizeof(uint16_t);
 
 // Use NEW_SAFE_RANGE to define new custom keycodes in order to not overwrite the ones used for front LED control
 enum custom_keycodes {
-  MY_KEYCODE = NEW_SAFE_RANGE, 
+  MY_KEYCODE = NEW_SAFE_RANGE,
 };
 
-
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
 	LAYOUT( /* Base */
 	KC_GESC, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_MINS, KC_EQL, KC_BSPC,
     KC_TAB, KC_Q, KC_W, KC_E, KC_R, KC_T, KC_Y, KC_U, KC_I, KC_O, KC_P, KC_LBRC, KC_RBRC, KC_BSLS, KC_DEL,
     KC_CAPSLOCK, KC_A, KC_S, KC_D, KC_F, KC_G, KC_H, KC_J, KC_K, KC_L, KC_SCLN, KC_QUOT, KC_ENT, KC_PGUP,
     KC_LSFT, KC_Z, KC_X, KC_C, KC_V, KC_B, KC_N, KC_M, KC_COMM, KC_DOT, KC_SLSH, KC_RSFT, KC_UP, KC_PGDN,
-    KC_LCTL, KC_LGUI, KC_LALT,           KC_SPACE,           KC_RALT, MO(1), KC_LEFT, KC_DOWN, KC_RGHT 
+    KC_LCTL, KC_LGUI, KC_LALT,           KC_SPACE,           KC_RALT, MO(1), KC_LEFT, KC_DOWN, KC_RGHT
 ),
 
     LAYOUT( /* L1 */
diff --git a/keyboards/mxss/keymaps/via/config.h b/keyboards/mxss/keymaps/via/config.h
new file mode 100644
index 0000000000..7451a7be4f
--- /dev/null
+++ b/keyboards/mxss/keymaps/via/config.h
@@ -0,0 +1,19 @@
+/* Copyright 2018 Jumail Mundekkat / MxBlue
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#define LAYER_STATE_8BIT
diff --git a/keyboards/mxss/keymaps/via/keymap.c b/keyboards/mxss/keymaps/via/keymap.c
new file mode 100644
index 0000000000..34e40592a6
--- /dev/null
+++ b/keyboards/mxss/keymaps/via/keymap.c
@@ -0,0 +1,33 @@
+/* Copyright 2018 Jumail Mundekkat / MxBlue
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+	LAYOUT_all( /* L0 */
+        KC_GESC, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_MINS, KC_EQL, KC_NO, KC_BSPC,
+        KC_TAB, KC_Q, KC_W, KC_E, KC_R, KC_T, KC_Y, KC_U, KC_I, KC_O, KC_P, KC_LBRC, KC_RBRC, KC_BSLS, KC_DEL,
+        KC_CAPSLOCK, KC_A, KC_S, KC_D, KC_F, KC_G, KC_H, KC_J, KC_K, KC_L, KC_SCLN, KC_QUOT, KC_NO, KC_ENT, KC_PGUP,
+        KC_LSFT, KC_NO, KC_Z, KC_X, KC_C, KC_V, KC_B, KC_N, KC_M, KC_COMM, KC_DOT, KC_SLSH, KC_RSFT, KC_UP, KC_PGDN,
+        KC_LCTL, KC_LGUI, KC_LALT, KC_SPACE, KC_SPACE, KC_SPACE, KC_RALT, MO(1), KC_LEFT, KC_DOWN, KC_RGHT
+    ),
+    LAYOUT_all( /* L1 */
+        KC_GRV, KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_F7, KC_F8, KC_F9, KC_F10, KC_F11, KC_F12, KC_TRNS, KC_TRNS,
+        KC_TRNS, KC_MPLY, KC_MPRV, KC_MNXT, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_HOME, KC_PSCR, FLED_VAD, FLED_VAI, FLED_MOD, RGB_VAI,
+        RESET, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_END, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, RGB_VAD,
+        KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_MUTE, KC_VOLD, KC_VOLU, KC_TRNS, RGB_MOD, RGB_SAI, RGB_TOG,
+        KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,  KC_TRNS, KC_TRNS,  KC_TRNS, KC_TRNS, RGB_HUD, RGB_SAD, RGB_HUI
+    )
+};
diff --git a/keyboards/mxss/keymaps/via/rules.mk b/keyboards/mxss/keymaps/via/rules.mk
new file mode 100644
index 0000000000..1e5b99807c
--- /dev/null
+++ b/keyboards/mxss/keymaps/via/rules.mk
@@ -0,0 +1 @@
+VIA_ENABLE = yes
diff --git a/keyboards/mxss/mxss.c b/keyboards/mxss/mxss.c
index 42ecdbc469..48ea466419 100644
--- a/keyboards/mxss/mxss.c
+++ b/keyboards/mxss/mxss.c
@@ -1,4 +1,4 @@
-/* Copyright 2018 Jumail Mundekkat / MxBlue
+/* Copyright 2020 Jumail Mundekkat / MxBlue
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -12,63 +12,29 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * EEPROM management code from ../cannonkeys/stm32f072/keyboard.c
  */
- 
+
 #include QMK_KEYBOARD_H
 #include "tmk_core/common/eeprom.h"
 #include "tmk_core/common/action_layer.h"
 #include "rgblight.h"
+#include "via.h"
+#include "version.h" // for QMK_BUILDDATE used in EEPROM magic
 
-// Variables for controlling front LED application
-uint8_t fled_mode;  // Mode for front LEDs
-uint8_t fled_val;   // Brightness for front leds (0 - 255)
-LED_TYPE fleds[2];  // Front LED rgb values for indicator mode use
-
-// Predefined colors for layers
-// Format: {hue, saturation}
-// {0, 0} to turn off the LED
-// Add additional rows to handle more layers
-__attribute__ ((weak))
-const hs_set layer_colors[] = {
-    [0] = {0,     0},  // Color for Layer 0
-    [1] = {86,    255},  // Color for Layer 1
-    [2] = {36,    255},  // Color for Layer 2
-    [3] = {185,   255},  // Color for Layer 3
-};
-
-__attribute__ ((weak))
-const size_t lc_size = sizeof(layer_colors) / sizeof(uint16_t);
+void via_init_kb(void) {
+	fled_init();
+}
 
 void matrix_init_kb(void) {
-    // If EEPROM config exists, load it
-    if (eeprom_is_valid()) {
-        fled_config fled_conf;
-        fled_conf.raw = eeprom_read_byte(EEPROM_FRONTLED_ADDR);
-        fled_mode = fled_conf.mode;
-        fled_val = fled_conf.val * FLED_VAL_STEP;
-    // Else, default config
-    } else {
-        fled_mode = FLED_RGB;
-        fled_val = 10 * FLED_VAL_STEP;
-        eeprom_update_conf();   // Store default config to EEPROM
-    }
-    
-    // Set default values for leds
-    setrgb(0, 0, 0, &fleds[0]);
-    setrgb(0, 0, 0, &fleds[1]);
-    
-    // Handle lighting for indicator mode
-    if (fled_mode == FLED_INDI) {
-        // Enable capslock led if enabled on host
-        if (host_keyboard_leds() & (1<<USB_LED_CAPS_LOCK))
-            sethsv(FLED_CAPS_H, FLED_CAPS_S, fled_val, &fleds[0]);
-        
-        // Determine and set colour of layer LED according to current layer
-        // if hue = sat = 0, leave LED off
-        uint8_t layer = biton32(layer_state);
-        if (layer < lc_size && !(layer_colors[layer].hue == 0 && layer_colors[layer].hue == 0))
-            sethsv(layer_colors[layer].hue, layer_colors[layer].sat, fled_val, &fleds[1]);
-    }
+    // If VIA is disabled, we still need to load settings
+	// Call via_init_kb() the same way as via_init(), with setting
+	// EEPROM valid afterwards.
+#ifndef VIA_ENABLE
+    fled_init();
+    via_eeprom_set_valid(true);
+#endif // VIA_ENABLE
 
 	matrix_init_user();
 }
@@ -82,132 +48,35 @@ void matrix_scan_kb(void) {
 
 bool process_record_kb(uint16_t keycode, keyrecord_t *record) {
     // Handle custom keycodes for front LED operation
-    switch (keycode) {
-        case FLED_MOD: // Change between front LED operation modes (off, indicator, RGB)
-        if (record->event.pressed)
-            fled_mode_cycle();
-        break;
-        
-        case FLED_VAI: // Increase the brightness of the front LEDs by FLED_VAL_STEP
-        if (record->event.pressed)
-            fled_val_increase();
-        break;
-        
-        case FLED_VAD: // Decrease the brightness of the front LEDs by FLED_VAL_STEP
-        if (record->event.pressed)
-            fled_val_decrease();
-        break;
-        
-        default:
-        break; // Process all other keycodes normally
-      }
-
+    process_record_fled(keycode, record);
 	return process_record_user(keycode, record);
 }
 
-void led_set_kb(uint8_t usb_led) {
-    // Set indicator LED appropriately, whether it is used or not
-    if (usb_led & (1 << USB_LED_CAPS_LOCK)) {
-        sethsv(FLED_CAPS_H, FLED_CAPS_S, fled_val, &fleds[0]);
-    } else {
-        setrgb(0, 0, 0, &fleds[0]);
-    }
-
-    rgblight_set();
-	led_set_user(usb_led);
-}
-
-uint32_t layer_state_set_kb(uint32_t state) {
-    // Determine and set colour of layer LED according to current layer
-    // if hue = sat = 0, leave LED off
-    uint8_t layer = biton32(state);
-    
-    if (layer < lc_size && !(layer_colors[layer].hue == 0 && layer_colors[layer].hue == 0))
-        sethsv(layer_colors[layer].hue, layer_colors[layer].sat, fled_val, &fleds[1]);
-    else
-        setrgb(0, 0, 0, &fleds[1]);
-    
-    return state;
-}
-
-// EEPROM Management
-
-// Test if magic value is present at expected location
-bool eeprom_is_valid(void)
-{
-	return (eeprom_read_word(EEPROM_MAGIC_ADDR) == EEPROM_MAGIC);
-}
-
-// Set magic value at expected location
-void eeprom_set_valid(bool valid)
-{
-	eeprom_update_word(EEPROM_MAGIC_ADDR, valid ? EEPROM_MAGIC : 0xFFFF);
+bool led_update_kb(led_t led_state) {
+    fled_lock_update(led_state);
+	return led_update_user(led_state);
 }
 
-// Store current front led config in EEPROM
-void eeprom_update_conf(void)
-{
-    // Create storage struct and set values
-    fled_config conf;
-    conf.mode = fled_mode;
-    
-    // Small hack to ensure max value is stored correctly
-    if (fled_val == 255)
-        conf.val = 256 / FLED_VAL_STEP;
-    else
-        conf.val = fled_val / FLED_VAL_STEP;
-    
-    // Set magic value and store config
-    eeprom_set_valid(true);
-	eeprom_update_byte(EEPROM_FRONTLED_ADDR, conf.raw);
+layer_state_t layer_state_set_kb(layer_state_t state) {
+    fled_layer_update(state);
+    return layer_state_set_user(state);
 }
 
-// Custom keycode functions
+// Fallback eeprom functions if VIA is not enabled
+#ifndef VIA_ENABLE
 
-void fled_mode_cycle(void)
+// Sets VIA/keyboard level usage of EEPROM to valid/invalid
+// Keyboard level code (eg. via_init_kb()) should not call this
+void via_eeprom_set_valid(bool valid)
 {
-    // FLED -> FLED_RGB -> FLED_INDI
-    switch (fled_mode) {
-        case FLED_OFF:
-        fled_mode = FLED_RGB;
-        break;
-        
-        case FLED_RGB:
-        fled_mode = FLED_INDI;
-        break;
-        
-        case FLED_INDI:
-        fled_mode = FLED_OFF;
-        break;
-    }
-    
-    // Update stored config
-    eeprom_update_conf();
-    rgblight_set();
+    char *p = QMK_BUILDDATE; // e.g. "2019-11-05-11:29:54"
+    uint8_t magic0 = ( ( p[2] & 0x0F ) << 4 ) | ( p[3]  & 0x0F );
+    uint8_t magic1 = ( ( p[5] & 0x0F ) << 4 ) | ( p[6]  & 0x0F );
+    uint8_t magic2 = ( ( p[8] & 0x0F ) << 4 ) | ( p[9]  & 0x0F );
+
+    eeprom_update_byte( (void*)VIA_EEPROM_MAGIC_ADDR+0, valid ? magic0 : 0xFF);
+    eeprom_update_byte( (void*)VIA_EEPROM_MAGIC_ADDR+1, valid ? magic1 : 0xFF);
+    eeprom_update_byte( (void*)VIA_EEPROM_MAGIC_ADDR+2, valid ? magic2 : 0xFF);
 }
 
-void fled_val_increase(void)
-{
-    // Increase val by FLED_VAL_STEP, handling the upper edge case
-    if (fled_val + FLED_VAL_STEP > 255)
-        fled_val = 255;
-    else
-        fled_val += FLED_VAL_STEP;
-    
-    // Update stored config
-    eeprom_update_conf();
-    rgblight_set();
-}
-
-void fled_val_decrease(void)
-{
-    // Decrease val by FLED_VAL_STEP, handling the lower edge case
-    if (fled_val - FLED_VAL_STEP > 255)
-        fled_val = 255;
-    else
-        fled_val -= FLED_VAL_STEP;
-    
-    // Update stored config
-    eeprom_update_conf();
-    rgblight_set();
-}
+#endif
diff --git a/keyboards/mxss/mxss.h b/keyboards/mxss/mxss.h
index 3572a19cdb..4074d411cc 100644
--- a/keyboards/mxss/mxss.h
+++ b/keyboards/mxss/mxss.h
@@ -13,8 +13,7 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
-#ifndef MXSS_H
-#define MXSS_H
+#pragma once
 
 #include "quantum.h"
 #include "mxss_frontled.h"
@@ -204,4 +203,18 @@
     { k40, k41, k42, k43, KC_NO, KC_NO, k46, KC_NO, k48, KC_NO, k4A, k4B, k4C, k4D, k4E }, \
 }
 
-#endif
+// All the gubs
+#define LAYOUT_all( \
+    k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k0A, k0B, k0C, k0D, k0E, \
+    k10, k11, k12, k13, k14, k15, k16, k17, k18, k19, k1A, k1B, k1C, k1D, k1E, \
+    k20, k21, k22, k23, k24, k25, k26, k27, k28, k29, k2A, k2B, k2C, k2D, k2E, \
+    k30, k31, k32, k33, k34, k35, k36, k37, k38, k39, k3A, k3B, k3C, k3D, k3E, \
+    k40, k41, k42,      k43,      k46,      k48,      k4A, k4B, k4C, k4D, k4E \
+) \
+{ \
+    { k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k0A, k0B, k0C, k0D, k0E }, \
+    { k10, k11, k12, k13, k14, k15, k16, k17, k18, k19, k1A, k1B, k1C, k1D, k1E }, \
+    { k20, k21, k22, k23, k24, k25, k26, k27, k28, k29, k2A, k2B, k2C, k2D, k2E }, \
+    { k30, k31, k32, k33, k34, k35, k36, k37, k38, k39, k3A, k3B, k3C, k3D, k3E }, \
+    { k40, k41, k42, k43, KC_NO, KC_NO, k46, KC_NO, k48, KC_NO, k4A, k4B, k4C, k4D, k4E }, \
+}
diff --git a/keyboards/mxss/mxss_frontled.c b/keyboards/mxss/mxss_frontled.c
new file mode 100644
index 0000000000..3f19747d28
--- /dev/null
+++ b/keyboards/mxss/mxss_frontled.c
@@ -0,0 +1,264 @@
+/* Copyright 2020 Jumail Mundekkat / MxBlue
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Extended from the work done by fcoury: https://github.com/qmk/qmk_firmware/pull/4915
+ */
+
+#include "mxss_frontled.h"
+#include "tmk_core/common/eeprom.h"
+#include "rgblight.h"
+#include "via.h"
+#include "version.h" // for QMK_BUILDDATE used in EEPROM magic
+
+// Variables for controlling front LED application
+uint8_t fled_mode;  // Mode for front LEDs
+uint8_t fled_val;   // Brightness for front leds (0 - 255)
+LED_TYPE fleds[2];  // Front LED rgb values for indicator mode use
+
+// Layer indicator colors
+__attribute__ ((weak))
+hs_set layer_colors[FRONTLED_COLOR_MAXCNT];
+
+// Caps lock indicator color
+__attribute__ ((weak))
+hs_set caps_color;
+
+__attribute__ ((weak))
+size_t lc_size = sizeof(layer_colors) / sizeof(hs_set);
+
+void fled_init(void) {
+    // If EEPROM config exists, load it
+    // If VIA EEPROM exists, FLED config should too
+    if (via_eeprom_is_valid()) {
+        fled_load_conf();
+    // Else, default config
+    } else {
+        // Default mode/brightness
+        fled_mode = FLED_RGB;
+        fled_val = 10 * FLED_VAL_STEP;
+
+        // Default colors
+        caps_color.hue = 0;
+        caps_color.sat = 255;
+        layer_colors[0].hue = 0;
+        layer_colors[0].sat = 0;
+        layer_colors[1].hue = 86;
+        layer_colors[1].sat = 255;
+        layer_colors[2].hue = 36;
+        layer_colors[2].sat = 255;
+        layer_colors[3].hue = 185;
+        layer_colors[3].sat = 255;
+
+        fled_update_conf();   // Store default config to EEPROM
+    }
+
+    // Set default values for leds
+    setrgb(0, 0, 0, &fleds[0]);
+    setrgb(0, 0, 0, &fleds[1]);
+
+    // Handle lighting for indicator mode
+    if (fled_mode == FLED_INDI) {
+        fled_lock_update(host_keyboard_led_state());
+        fled_layer_update(layer_state);
+    }
+}
+
+void  process_record_fled(uint16_t keycode, keyrecord_t *record) {
+    // Handle custom keycodes for front LED operation
+    switch (keycode) {
+        case FLED_MOD: // Change between front LED operation modes (off, indicator, RGB)
+        if (record->event.pressed)
+            fled_mode_cycle();
+        break;
+
+        case FLED_VAI: // Increase the brightness of the front LEDs by FLED_VAL_STEP
+        if (record->event.pressed)
+            fled_val_increase();
+        break;
+
+        case FLED_VAD: // Decrease the brightness of the front LEDs by FLED_VAL_STEP
+        if (record->event.pressed)
+            fled_val_decrease();
+        break;
+
+        default:
+        break; // Process all other keycodes normally
+      }
+
+	return;
+}
+
+void fled_load_conf(void) {
+    // Load config
+    fled_config fled_conf;
+    fled_conf.raw = eeprom_read_byte(FRONTLED_CONF_ADDR);
+    fled_mode = fled_conf.mode;
+    fled_val = fled_conf.val * FLED_VAL_STEP;
+
+    // Load color data
+    uint8_t stored_cnt = eeprom_read_byte(FRONTLED_COLOR_CNT_ADDR);
+    uint16_t *color_ptr = FRONTLED_COLOR_ADDR;
+    caps_color.raw = eeprom_read_word(color_ptr); // Should always store at least 1 color
+    for (uint8_t i = 1; i < stored_cnt; i++) {
+        if (i == lc_size) // Can't load more layers than we have available
+            break;
+        layer_colors[i].raw = eeprom_read_word(&color_ptr[i]);
+    }
+    layer_colors[0].raw = 0; // hue = sat = 0 for layer 0
+}
+
+// Store current front led config in EEPROM
+void fled_update_conf(void)
+{
+    // Create storage struct and set values
+    fled_config conf;
+    conf.mode = fled_mode;
+
+    // Small hack to ensure max value is stored correctly
+    if (fled_val == 255)
+        conf.val = 256 / FLED_VAL_STEP;
+    else
+        conf.val = fled_val / FLED_VAL_STEP;
+
+    // Store config
+    eeprom_update_byte(FRONTLED_CONF_ADDR, conf.raw);
+
+    // Store color data
+    uint16_t *color_ptr = FRONTLED_COLOR_ADDR;
+    eeprom_update_word(color_ptr, caps_color.raw);
+    // Start from 1, layer 0 is not modifiable and therefore not persisted
+    uint8_t i = 1;
+    for (; i < lc_size; i++) {
+        if (i == FRONTLED_COLOR_MAXCNT) // Can't store more than the EEPROM we have available
+            break;
+        eeprom_update_word(&color_ptr[i], layer_colors[i].raw);
+    }
+    eeprom_update_byte(FRONTLED_COLOR_CNT_ADDR, i); // For safety, store the count of colors stored
+}
+
+// Custom keycode functions
+
+void fled_mode_cycle(void)
+{
+    // FLED -> FLED_RGB -> FLED_INDI
+    switch (fled_mode) {
+        case FLED_OFF:
+        fled_mode = FLED_RGB;
+        rgblight_timer_enable();
+        break;
+
+        case FLED_RGB:
+        fled_mode = FLED_INDI;
+        break;
+
+        case FLED_INDI:
+        fled_mode = FLED_OFF;
+        break;
+    }
+
+    // Update stored config
+    fled_update_conf();
+    rgblight_set();
+}
+
+void fled_val_increase(void)
+{
+    // Increase val by FLED_VAL_STEP, handling the upper edge case
+    if (fled_val + FLED_VAL_STEP > 255)
+        fled_val = 255;
+    else
+        fled_val += FLED_VAL_STEP;
+
+    // Update stored config
+    fled_update_conf();
+    rgblight_set();
+}
+
+void fled_val_decrease(void)
+{
+    // Decrease val by FLED_VAL_STEP, handling the lower edge case
+    if (fled_val - FLED_VAL_STEP > 255)
+        fled_val = 255;
+    else
+        fled_val -= FLED_VAL_STEP;
+
+    // Update stored config
+    fled_update_conf();
+    rgblight_set();
+}
+
+void fled_layer_update(layer_state_t state) {
+    // Determine and set colour of layer LED according to current layer
+    // if hue = sat = 0, leave LED off
+    uint8_t layer = get_highest_layer(state);
+
+    if (layer < lc_size && !(layer_colors[layer].hue == 0 && layer_colors[layer].sat == 0)) {
+        sethsv(layer_colors[layer].hue, layer_colors[layer].sat, fled_val, &fleds[1]);
+    } else {
+        setrgb(0, 0, 0, &fleds[1]);
+    }
+}
+
+void fled_lock_update(led_t led_state) {
+    // Set indicator LED appropriately, whether it is used or not
+    if (led_state.caps_lock) {
+        sethsv(caps_color.hue, caps_color.sat, fled_val, &fleds[0]);
+    } else {
+        setrgb(0, 0, 0, &fleds[0]);
+    }
+
+    rgblight_set();
+}
+
+void set_fled_layer_color(uint8_t layer, hs_set hs) {
+    // Update layer colors and refresh LEDs
+    layer_colors[layer] = hs;
+    fled_layer_update(layer_state);
+    fled_update_conf();
+}
+
+hs_set get_fled_layer_color(uint8_t layer) {
+    return layer_colors[layer];
+}
+
+void set_fled_caps_color(hs_set hs) {
+    // Update caplock color and refresh LEDs
+    caps_color = hs;
+    fled_lock_update(host_keyboard_led_state());
+    fled_update_conf();
+}
+
+hs_set get_fled_caps_color(void) {
+    return caps_color;
+}
+
+// Fallback eeprom functions if VIA is not enabled
+#ifndef VIA_ENABLE
+
+// Can be called in an overriding via_init_kb() to test if keyboard level code usage of
+// EEPROM is invalid and use/save defaults.
+bool via_eeprom_is_valid(void)
+{
+    char *p = QMK_BUILDDATE; // e.g. "2019-11-05-11:29:54"
+    uint8_t magic0 = ( ( p[2] & 0x0F ) << 4 ) | ( p[3]  & 0x0F );
+    uint8_t magic1 = ( ( p[5] & 0x0F ) << 4 ) | ( p[6]  & 0x0F );
+    uint8_t magic2 = ( ( p[8] & 0x0F ) << 4 ) | ( p[9]  & 0x0F );
+
+    return (eeprom_read_byte( (void*)VIA_EEPROM_MAGIC_ADDR+0 ) == magic0 &&
+            eeprom_read_byte( (void*)VIA_EEPROM_MAGIC_ADDR+1 ) == magic1 &&
+            eeprom_read_byte( (void*)VIA_EEPROM_MAGIC_ADDR+2 ) == magic2 );
+}
+
+#endif
diff --git a/keyboards/mxss/mxss_frontled.h b/keyboards/mxss/mxss_frontled.h
index 1350266ba9..3660668655 100644
--- a/keyboards/mxss/mxss_frontled.h
+++ b/keyboards/mxss/mxss_frontled.h
@@ -1,4 +1,4 @@
-/* Copyright 2018 Jumail Mundekkat / MxBlue
+/* Copyright 2020 Jumail Mundekkat / MxBlue
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -16,11 +16,12 @@
 
 // EEPROM management code taken from Wilba6582
 // https://github.com/Wilba6582/qmk_firmware/blob/zeal60/keyboards/zeal60/zeal_eeprom.h
- 
-#ifndef MXSS_FRONTLED_H
-#define MXSS_FRONTLED_H
 
+#pragma once
+
+#include "quantum.h"
 #include "quantum_keycodes.h"
+#include "via.h"
 
 // RGBLED index for front LEDs
 #define RGBLIGHT_FLED1 14
@@ -29,13 +30,13 @@
 // Brightness increase step for front LEDs
 #define FLED_VAL_STEP 8
 
-// QMK never uses more then 32bytes of EEPROM, so our region starts there
-// Magic value to verify the state of the EEPROM
-#define EEPROM_MAGIC 0xC3E7
-#define EEPROM_MAGIC_ADDR ((void*)32)
-
 // Front LED settings
-#define EEPROM_FRONTLED_ADDR ((void*)34)
+#define FRONTLED_CONF_ADDR ((uint8_t*) VIA_EEPROM_CUSTOM_CONFIG_ADDR)
+#define FRONTLED_COLOR_CNT_ADDR (FRONTLED_CONF_ADDR + 1)
+#define FRONTLED_COLOR_ADDR ((uint16_t*)(FRONTLED_COLOR_CNT_ADDR + 1))
+
+// No point persisting more 4, VIA only allows editing of 3 + 1 for caps
+#define FRONTLED_COLOR_MAXCNT 4
 
 // Modes for front LEDs
 #define FLED_OFF    0b00
@@ -43,10 +44,6 @@
 #define FLED_RGB    0b10
 #define FLED_UNDEF  0b11
 
-// Hard-coded color for capslock indicator in FLED_INDI mode, H:0% S:100% = Red
-#define FLED_CAPS_H 0
-#define FLED_CAPS_S 255
-
 // Config storage format for EEPROM
 typedef union {
   uint8_t raw;
@@ -57,25 +54,35 @@ typedef union {
 } fled_config;
 
 // Structure to store hue and saturation values
-typedef struct _hs_set {
-    uint16_t hue; 
-    uint8_t sat;
+typedef union {
+    uint16_t raw;
+    struct {
+        uint8_t hue;
+        uint8_t sat;
+    };
 } hs_set;
 
 // Custom keycodes for front LED control
 enum fled_keycodes {
-  FLED_MOD = SAFE_RANGE,
-  FLED_VAI,
-  FLED_VAD,
-  NEW_SAFE_RANGE // define a new safe range
+    FLED_MOD = USER00, // USER00 = VIA custom keycode start
+    FLED_VAI,
+    FLED_VAD,
+    NEW_SAFE_RANGE // define a new safe range
 };
 
-bool eeprom_is_valid(void);         // Check if EEPROM has been set up
-void eeprom_set_valid(bool valid);  // Change validity state of EEPROM
-void eeprom_update_conf(void);      // Store current front LED config to EEPROM
+void fled_init(void);                // Run init functions for front LEDs
+void process_record_fled(uint16_t keycode, keyrecord_t* record); // Process keycodes for front LEDs
+void fled_load_conf(void);          // Load front LED config from EEPROM
+void fled_update_conf(void);        // Store current front LED config to EEPROM
 
 void fled_mode_cycle(void);         // Cycle between the 3 modes for the front LEDs
 void fled_val_increase(void);       // Increase the brightness of the front LEDs
 void fled_val_decrease(void);       // Decrease the brightness of the front LEDs
 
-#endif //MXSS_FRONTLED_H
\ No newline at end of file
+void fled_layer_update(layer_state_t state);   // Process layer update for front LEDs
+void fled_lock_update(led_t led_state);     // Process lock update for front LEDs
+
+void set_fled_layer_color(uint8_t layer, hs_set hs); // Set color for a given layer
+void set_fled_caps_color(hs_set hs);        // Set color for the capslock indicator
+hs_set get_fled_caps_color(void);           // Get color for the capslock indicator
+hs_set get_fled_layer_color(uint8_t layer);       // Get color for a given layer
diff --git a/keyboards/mxss/readme.md b/keyboards/mxss/readme.md
index 181b6366a0..f35709adee 100644
--- a/keyboards/mxss/readme.md
+++ b/keyboards/mxss/readme.md
@@ -2,6 +2,11 @@
 
 ![MxSS - Polycarb 65% Kit for MX/SMK](https://i.imgur.com/WDTWcmU.jpg)
 
+### Important Note:
+**This PCB supports the VIA configurator, and this is the recommended way to configure the keymap on this keyboard. Building the firmware should only be necessary if you would like to change the colours of the front LEDs in indicator mode.**
+
+**For more information about the VIA configurator, [see here](https://caniusevia.com/).**
+
 ### Information:
 
  - Case: Frosted Polycarbonate, CNC milled
@@ -51,4 +56,4 @@ Colors for FLED_INDI mode are hardcoded as hue/saturation values, the caps lock
  
  # Further Notes
  
- As SAFE_RANGE is used for defining the custom keycodes seen above, please use NEW_SAFE_RANGE as the starting value for any custom keycodes in keymap.c, as per the example.
\ No newline at end of file
+ As SAFE_RANGE is used for defining the custom keycodes seen above, please use NEW_SAFE_RANGE as the starting value for any custom keycodes in keymap.c, as per the example.
diff --git a/keyboards/mxss/rgblight.c b/keyboards/mxss/rgblight.c
index 73f94f3ab0..9e17510b59 100644
--- a/keyboards/mxss/rgblight.c
+++ b/keyboards/mxss/rgblight.c
@@ -14,814 +14,1166 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include <math.h>
-#include <avr/eeprom.h>
-#include <avr/interrupt.h>
-#include <util/delay.h>
+#include <string.h>
+#ifdef __AVR__
+#    include <avr/eeprom.h>
+#    include <avr/interrupt.h>
+#endif
+#ifdef STM32_EEPROM_ENABLE
+#    include "hal.h"
+#    include "eeprom.h"
+#    include "eeprom_stm32.h"
+#endif
+#include "wait.h"
 #include "progmem.h"
 #include "timer.h"
 #include "rgblight.h"
+#include "color.h"
 #include "debug.h"
 #include "led_tables.h"
+#include "lib/lib8tion/lib8tion.h"
+#ifdef VELOCIKEY_ENABLE
+#    include "velocikey.h"
+#endif
+// MxSS custom
 #include "mxss_frontled.h"
 
-#ifndef RGBLIGHT_LIMIT_VAL
-#define RGBLIGHT_LIMIT_VAL 255
+#ifdef RGBLIGHT_SPLIT
+/* for split keyboard */
+#    define RGBLIGHT_SPLIT_SET_CHANGE_MODE rgblight_status.change_flags |= RGBLIGHT_STATUS_CHANGE_MODE
+#    define RGBLIGHT_SPLIT_SET_CHANGE_HSVS rgblight_status.change_flags |= RGBLIGHT_STATUS_CHANGE_HSVS
+#    define RGBLIGHT_SPLIT_SET_CHANGE_MODEHSVS rgblight_status.change_flags |= (RGBLIGHT_STATUS_CHANGE_MODE | RGBLIGHT_STATUS_CHANGE_HSVS)
+#    define RGBLIGHT_SPLIT_SET_CHANGE_TIMER_ENABLE rgblight_status.change_flags |= RGBLIGHT_STATUS_CHANGE_TIMER
+#    define RGBLIGHT_SPLIT_ANIMATION_TICK rgblight_status.change_flags |= RGBLIGHT_STATUS_ANIMATION_TICK
+#else
+#    define RGBLIGHT_SPLIT_SET_CHANGE_MODE
+#    define RGBLIGHT_SPLIT_SET_CHANGE_HSVS
+#    define RGBLIGHT_SPLIT_SET_CHANGE_MODEHSVS
+#    define RGBLIGHT_SPLIT_SET_CHANGE_TIMER_ENABLE
+#    define RGBLIGHT_SPLIT_ANIMATION_TICK
 #endif
 
-#define MIN(a,b) (((a)<(b))?(a):(b))
-#define MAX(a,b) (((a)>(b))?(a):(b))
-
-#define LED_PTRTOIND(ptr) ((uint32_t) (ptr - led)/sizeof(LED_TYPE))
-
-void copyrgb(LED_TYPE *src, LED_TYPE *dst);
+#define _RGBM_SINGLE_STATIC(sym) RGBLIGHT_MODE_##sym,
+#define _RGBM_SINGLE_DYNAMIC(sym)
+#define _RGBM_MULTI_STATIC(sym) RGBLIGHT_MODE_##sym,
+#define _RGBM_MULTI_DYNAMIC(sym)
+#define _RGBM_TMP_STATIC(sym, msym) RGBLIGHT_MODE_##sym,
+#define _RGBM_TMP_DYNAMIC(sym, msym)
+static uint8_t static_effect_table[] = {
+#include "rgblight_modes.h"
+};
+
+#define _RGBM_SINGLE_STATIC(sym) RGBLIGHT_MODE_##sym,
+#define _RGBM_SINGLE_DYNAMIC(sym) RGBLIGHT_MODE_##sym,
+#define _RGBM_MULTI_STATIC(sym) RGBLIGHT_MODE_##sym,
+#define _RGBM_MULTI_DYNAMIC(sym) RGBLIGHT_MODE_##sym,
+#define _RGBM_TMP_STATIC(sym, msym) RGBLIGHT_MODE_##msym,
+#define _RGBM_TMP_DYNAMIC(sym, msym) RGBLIGHT_MODE_##msym,
+static uint8_t mode_base_table[] = {
+    0,  // RGBLIGHT_MODE_zero
+#include "rgblight_modes.h"
+};
+
+static inline int is_static_effect(uint8_t mode) { return memchr(static_effect_table, mode, sizeof(static_effect_table)) != NULL; }
+
+#ifdef RGBLIGHT_LED_MAP
+const uint8_t led_map[] PROGMEM = RGBLIGHT_LED_MAP;
+#endif
 
-__attribute__ ((weak))
-const uint8_t RGBLED_BREATHING_INTERVALS[] PROGMEM = {30, 20, 10, 5};
-__attribute__ ((weak))
-const uint8_t RGBLED_RAINBOW_MOOD_INTERVALS[] PROGMEM = {120, 60, 30};
-__attribute__ ((weak))
-const uint8_t RGBLED_RAINBOW_SWIRL_INTERVALS[] PROGMEM = {100, 50, 20};
-__attribute__ ((weak))
-const uint8_t RGBLED_SNAKE_INTERVALS[] PROGMEM = {100, 50, 20};
-__attribute__ ((weak))
-const uint8_t RGBLED_KNIGHT_INTERVALS[] PROGMEM = {127, 63, 31};
-__attribute__ ((weak))
-const uint16_t RGBLED_GRADIENT_RANGES[] PROGMEM = {360, 240, 180, 120, 90};
-__attribute__ ((weak))
-const uint16_t RGBLED_RGBTEST_INTERVALS[] PROGMEM = {1024};
+#ifdef RGBLIGHT_EFFECT_STATIC_GRADIENT
+__attribute__((weak)) const uint8_t RGBLED_GRADIENT_RANGES[] PROGMEM = {255, 170, 127, 85, 64};
+#endif
 
 rgblight_config_t rgblight_config;
+rgblight_status_t rgblight_status         = {.timer_enabled = false};
+bool              is_rgblight_initialized = false;
+
+#ifdef RGBLIGHT_USE_TIMER
+animation_status_t animation_status = {};
+#endif
 
+#ifndef LED_ARRAY
 LED_TYPE led[RGBLED_NUM];
+#    define LED_ARRAY led
+#endif
 
-bool rgblight_timer_enabled = false;
+static uint8_t clipping_start_pos = 0;
+static uint8_t clipping_num_leds  = RGBLED_NUM;
+static uint8_t effect_start_pos   = 0;
+static uint8_t effect_end_pos     = RGBLED_NUM;
+static uint8_t effect_num_leds    = RGBLED_NUM;
 
+// MxSS custom
 extern uint8_t fled_mode;
 extern uint8_t fled_val;
 extern LED_TYPE fleds[2];
 hs_set fled_hs[2];
 
-void sethsv(uint16_t hue, uint8_t sat, uint8_t val, LED_TYPE *led1) {
-  uint8_t r = 0, g = 0, b = 0, base, color;
-  
-  // if led is front leds, cache the hue and sat values
-  if (led1 == &led[RGBLIGHT_FLED1]) {
-      fled_hs[0].hue = hue;
-      fled_hs[0].sat = sat;
-  } else if (led1 == &led[RGBLIGHT_FLED2]) {
-      fled_hs[1].hue = hue;
-      fled_hs[1].sat = sat;
-  }
+void copyrgb(LED_TYPE *src, LED_TYPE *dst) {
+  (*dst).r = (*src).r;
+  (*dst).g = (*src).g;
+  (*dst).b = (*src).b;
+}
 
-  if (val > RGBLIGHT_LIMIT_VAL) {
-      val=RGBLIGHT_LIMIT_VAL; // limit the val
-  }
+void rgblight_set_clipping_range(uint8_t start_pos, uint8_t num_leds) {
+    clipping_start_pos = start_pos;
+    clipping_num_leds  = num_leds;
+}
 
-  if (sat == 0) { // Acromatic color (gray). Hue doesn't mind.
-    r = val;
-    g = val;
-    b = val;
-  } else {
-    base = ((255 - sat) * val) >> 8;
-    color = (val - base) * (hue % 60) / 60;
-
-    switch (hue / 60) {
-      case 0:
-        r = val;
-        g = base + color;
-        b = base;
-        break;
-      case 1:
-        r = val - color;
-        g = val;
-        b = base;
-        break;
-      case 2:
-        r = base;
-        g = val;
-        b = base + color;
-        break;
-      case 3:
-        r = base;
-        g = val - color;
-        b = val;
-        break;
-      case 4:
-        r = base + color;
-        g = base;
-        b = val;
-        break;
-      case 5:
-        r = val;
-        g = base;
-        b = val - color;
-        break;
-    }
-  }
-  r = pgm_read_byte(&CIE1931_CURVE[r]);
-  g = pgm_read_byte(&CIE1931_CURVE[g]);
-  b = pgm_read_byte(&CIE1931_CURVE[b]);
+void rgblight_set_effect_range(uint8_t start_pos, uint8_t num_leds) {
+    if (start_pos >= RGBLED_NUM) return;
+    if (start_pos + num_leds > RGBLED_NUM) return;
+    effect_start_pos = start_pos;
+    effect_end_pos   = start_pos + num_leds;
+    effect_num_leds  = num_leds;
+}
 
-  setrgb(r, g, b, led1);
+void sethsv_raw(uint8_t hue, uint8_t sat, uint8_t val, LED_TYPE *led1) {
+    HSV hsv = {hue, sat, val};
+    // MxSS custom
+    // if led is front leds, cache the hue and sat values
+    if (led1 == &led[RGBLIGHT_FLED1]) {
+        fled_hs[0].hue = hue;
+        fled_hs[0].sat = sat;
+    } else if (led1 == &led[RGBLIGHT_FLED2]) {
+        fled_hs[1].hue = hue;
+        fled_hs[1].sat = sat;
+    }  RGB rgb = hsv_to_rgb(hsv);
+    setrgb(rgb.r, rgb.g, rgb.b, led1);
 }
 
+void sethsv(uint8_t hue, uint8_t sat, uint8_t val, LED_TYPE *led1) { sethsv_raw(hue, sat, val > RGBLIGHT_LIMIT_VAL ? RGBLIGHT_LIMIT_VAL : val, led1); }
+
 void setrgb(uint8_t r, uint8_t g, uint8_t b, LED_TYPE *led1) {
-  (*led1).r = r;
-  (*led1).g = g;
-  (*led1).b = b;
+    (*led1).r = r;
+    (*led1).g = g;
+    (*led1).b = b;
+#ifdef RGBW
+    (*led1).w = 0;
+#endif
 }
 
-void copyrgb(LED_TYPE *src, LED_TYPE *dst) {
-  (*dst).r = (*src).r;
-  (*dst).g = (*src).g;
-  (*dst).b = (*src).b;
+void rgblight_check_config(void) {
+    /* Add some out of bound checks for RGB light config */
+
+    if (rgblight_config.mode < RGBLIGHT_MODE_STATIC_LIGHT) {
+        rgblight_config.mode = RGBLIGHT_MODE_STATIC_LIGHT;
+    } else if (rgblight_config.mode > RGBLIGHT_MODES) {
+        rgblight_config.mode = RGBLIGHT_MODES;
+    }
+
+    if (rgblight_config.val > RGBLIGHT_LIMIT_VAL) {
+        rgblight_config.val = RGBLIGHT_LIMIT_VAL;
+    }
 }
 
 uint32_t eeconfig_read_rgblight(void) {
-  return eeprom_read_dword(EECONFIG_RGBLIGHT);
+#if defined(__AVR__) || defined(STM32_EEPROM_ENABLE) || defined(PROTOCOL_ARM_ATSAM) || defined(EEPROM_SIZE)
+    return eeprom_read_dword(EECONFIG_RGBLIGHT);
+#else
+    return 0;
+#endif
 }
+
 void eeconfig_update_rgblight(uint32_t val) {
-  eeprom_update_dword(EECONFIG_RGBLIGHT, val);
+#if defined(__AVR__) || defined(STM32_EEPROM_ENABLE) || defined(PROTOCOL_ARM_ATSAM) || defined(EEPROM_SIZE)
+    rgblight_check_config();
+    eeprom_update_dword(EECONFIG_RGBLIGHT, val);
+#endif
 }
+
 void eeconfig_update_rgblight_default(void) {
-  dprintf("eeconfig_update_rgblight_default\n");
-  rgblight_config.enable = 1;
-  rgblight_config.mode = 1;
-  rgblight_config.hue = 0;
-  rgblight_config.sat = 255;
-  rgblight_config.val = RGBLIGHT_LIMIT_VAL;
-  rgblight_config.speed = 0;
-  eeconfig_update_rgblight(rgblight_config.raw);
+    rgblight_config.enable = 1;
+    rgblight_config.mode   = RGBLIGHT_MODE_STATIC_LIGHT;
+    rgblight_config.hue    = 0;
+    rgblight_config.sat    = UINT8_MAX;
+    rgblight_config.val    = RGBLIGHT_LIMIT_VAL;
+    rgblight_config.speed  = 0;
+    RGBLIGHT_SPLIT_SET_CHANGE_MODEHSVS;
+    eeconfig_update_rgblight(rgblight_config.raw);
 }
+
 void eeconfig_debug_rgblight(void) {
-  dprintf("rgblight_config eprom\n");
-  dprintf("rgblight_config.enable = %d\n", rgblight_config.enable);
-  dprintf("rghlight_config.mode = %d\n", rgblight_config.mode);
-  dprintf("rgblight_config.hue = %d\n", rgblight_config.hue);
-  dprintf("rgblight_config.sat = %d\n", rgblight_config.sat);
-  dprintf("rgblight_config.val = %d\n", rgblight_config.val);
-  dprintf("rgblight_config.speed = %d\n", rgblight_config.speed);
+    dprintf("rgblight_config EEPROM:\n");
+    dprintf("rgblight_config.enable = %d\n", rgblight_config.enable);
+    dprintf("rghlight_config.mode = %d\n", rgblight_config.mode);
+    dprintf("rgblight_config.hue = %d\n", rgblight_config.hue);
+    dprintf("rgblight_config.sat = %d\n", rgblight_config.sat);
+    dprintf("rgblight_config.val = %d\n", rgblight_config.val);
+    dprintf("rgblight_config.speed = %d\n", rgblight_config.speed);
 }
 
 void rgblight_init(void) {
-  debug_enable = 1; // Debug ON!
-  dprintf("rgblight_init called.\n");
-  dprintf("rgblight_init start!\n");
-  if (!eeconfig_is_enabled()) {
-    dprintf("rgblight_init eeconfig is not enabled.\n");
-    eeconfig_init();
-    eeconfig_update_rgblight_default();
-  }
-  rgblight_config.raw = eeconfig_read_rgblight();
-  if (!rgblight_config.mode) {
-    dprintf("rgblight_init rgblight_config.mode = 0. Write default values to EEPROM.\n");
-    eeconfig_update_rgblight_default();
+    /* if already initialized, don't do it again.
+       If you must do it again, extern this and set to false, first.
+       This is a dirty, dirty hack until proper hooks can be added for keyboard startup. */
+    if (is_rgblight_initialized) {
+        return;
+    }
+
+    dprintf("rgblight_init called.\n");
+    dprintf("rgblight_init start!\n");
+    if (!eeconfig_is_enabled()) {
+        dprintf("rgblight_init eeconfig is not enabled.\n");
+        eeconfig_init();
+        eeconfig_update_rgblight_default();
+    }
     rgblight_config.raw = eeconfig_read_rgblight();
-  }
-  eeconfig_debug_rgblight(); // display current eeprom values
+    RGBLIGHT_SPLIT_SET_CHANGE_MODEHSVS;
+    if (!rgblight_config.mode) {
+        dprintf("rgblight_init rgblight_config.mode = 0. Write default values to EEPROM.\n");
+        eeconfig_update_rgblight_default();
+        rgblight_config.raw = eeconfig_read_rgblight();
+    }
+    rgblight_check_config();
 
-  #ifdef RGBLIGHT_ANIMATIONS
-    rgblight_timer_init(); // setup the timer
-  #endif
+    eeconfig_debug_rgblight();  // display current eeprom values
 
-  if (rgblight_config.enable) {
-    rgblight_mode_noeeprom(rgblight_config.mode);
-  }
+#ifdef RGBLIGHT_USE_TIMER
+    rgblight_timer_init();  // setup the timer
+#endif
+
+    if (rgblight_config.enable) {
+        rgblight_mode_noeeprom(rgblight_config.mode);
+    }
+
+    is_rgblight_initialized = true;
 }
 
+uint32_t rgblight_read_dword(void) { return rgblight_config.raw; }
+
 void rgblight_update_dword(uint32_t dword) {
-  rgblight_config.raw = dword;
-  eeconfig_update_rgblight(rgblight_config.raw);
-  if (rgblight_config.enable)
-    rgblight_mode(rgblight_config.mode);
-  else {
-    #ifdef RGBLIGHT_ANIMATIONS
-      rgblight_timer_disable();
-    #endif
-      rgblight_set();
-  }
+    RGBLIGHT_SPLIT_SET_CHANGE_MODEHSVS;
+    rgblight_config.raw = dword;
+    if (rgblight_config.enable)
+        rgblight_mode_noeeprom(rgblight_config.mode);
+    else {
+#ifdef RGBLIGHT_USE_TIMER
+        rgblight_timer_disable();
+#endif
+        rgblight_set();
+    }
 }
 
 void rgblight_increase(void) {
-  uint8_t mode = 0;
-  if (rgblight_config.mode < RGBLIGHT_MODES) {
-    mode = rgblight_config.mode + 1;
-  }
-  rgblight_mode(mode);
+    uint8_t mode = 0;
+    if (rgblight_config.mode < RGBLIGHT_MODES) {
+        mode = rgblight_config.mode + 1;
+    }
+    rgblight_mode(mode);
 }
 void rgblight_decrease(void) {
-  uint8_t mode = 0;
-  // Mode will never be < 1. If it ever is, eeprom needs to be initialized.
-  if (rgblight_config.mode > 1) {
-    mode = rgblight_config.mode - 1;
-  }
-  rgblight_mode(mode);
+    uint8_t mode = 0;
+    // Mode will never be < 1. If it ever is, eeprom needs to be initialized.
+    if (rgblight_config.mode > RGBLIGHT_MODE_STATIC_LIGHT) {
+        mode = rgblight_config.mode - 1;
+    }
+    rgblight_mode(mode);
 }
-void rgblight_step(void) {
-  uint8_t mode = 0;
-  mode = rgblight_config.mode + 1;
-  if (mode > RGBLIGHT_MODES) {
-    mode = 1;
-  }
-  rgblight_mode(mode);
+void rgblight_step_helper(bool write_to_eeprom) {
+    uint8_t mode = 0;
+    mode         = rgblight_config.mode + 1;
+    if (mode > RGBLIGHT_MODES) {
+        mode = 1;
+    }
+    rgblight_mode_eeprom_helper(mode, write_to_eeprom);
 }
-void rgblight_step_reverse(void) {
-  uint8_t mode = 0;
-  mode = rgblight_config.mode - 1;
-  if (mode < 1) {
-    mode = RGBLIGHT_MODES;
-  }
-  rgblight_mode(mode);
+void rgblight_step_noeeprom(void) { rgblight_step_helper(false); }
+void rgblight_step(void) { rgblight_step_helper(true); }
+void rgblight_step_reverse_helper(bool write_to_eeprom) {
+    uint8_t mode = 0;
+    mode         = rgblight_config.mode - 1;
+    if (mode < 1) {
+        mode = RGBLIGHT_MODES;
+    }
+    rgblight_mode_eeprom_helper(mode, write_to_eeprom);
 }
+void rgblight_step_reverse_noeeprom(void) { rgblight_step_reverse_helper(false); }
+void rgblight_step_reverse(void) { rgblight_step_reverse_helper(true); }
 
 uint8_t rgblight_get_mode(void) {
-  if (!rgblight_config.enable) {
-    return false;
-  }
+    if (!rgblight_config.enable) {
+        return false;
+    }
 
-  return rgblight_config.mode;
+    return rgblight_config.mode;
 }
 
 void rgblight_mode_eeprom_helper(uint8_t mode, bool write_to_eeprom) {
-  if (!rgblight_config.enable) {
-    return;
-  }
-  if (mode < 1) {
-    rgblight_config.mode = 1;
-  } else if (mode > RGBLIGHT_MODES) {
-    rgblight_config.mode = RGBLIGHT_MODES;
-  } else {
-    rgblight_config.mode = mode;
-  }
-  if (write_to_eeprom) {
-    eeconfig_update_rgblight(rgblight_config.raw);
-    xprintf("rgblight mode [EEPROM]: %u\n", rgblight_config.mode);
-  } else {
-    xprintf("rgblight mode [NOEEPROM]: %u\n", rgblight_config.mode);
-  }
-  if (rgblight_config.mode == 1) {
-    #ifdef RGBLIGHT_ANIMATIONS
-      rgblight_timer_disable();
-    #endif
-  } else if ((rgblight_config.mode >= 2 && rgblight_config.mode <= 24) ||
-	     rgblight_config.mode == 35 ) {
-    // MODE 2-5, breathing
-    // MODE 6-8, rainbow mood
-    // MODE 9-14, rainbow swirl
-    // MODE 15-20, snake
-    // MODE 21-23, knight
-    // MODE 24, xmas
-    // MODE 35  RGB test
-
-    #ifdef RGBLIGHT_ANIMATIONS
-      rgblight_timer_enable();
-    #endif
-  } else if (rgblight_config.mode >= 25 && rgblight_config.mode <= 34) {
-    // MODE 25-34, static gradient
-
-    #ifdef RGBLIGHT_ANIMATIONS
-      rgblight_timer_disable();
-    #endif
-  }
-  rgblight_sethsv_noeeprom(rgblight_config.hue, rgblight_config.sat, rgblight_config.val);
-}
-
-void rgblight_mode(uint8_t mode) {
-  rgblight_mode_eeprom_helper(mode, true);
+    if (!rgblight_config.enable) {
+        return;
+    }
+    if (mode < RGBLIGHT_MODE_STATIC_LIGHT) {
+        rgblight_config.mode = RGBLIGHT_MODE_STATIC_LIGHT;
+    } else if (mode > RGBLIGHT_MODES) {
+        rgblight_config.mode = RGBLIGHT_MODES;
+    } else {
+        rgblight_config.mode = mode;
+    }
+    RGBLIGHT_SPLIT_SET_CHANGE_MODE;
+    if (write_to_eeprom) {
+        eeconfig_update_rgblight(rgblight_config.raw);
+        dprintf("rgblight mode [EEPROM]: %u\n", rgblight_config.mode);
+    } else {
+        dprintf("rgblight mode [NOEEPROM]: %u\n", rgblight_config.mode);
+    }
+    if (is_static_effect(rgblight_config.mode)) {
+#ifdef RGBLIGHT_USE_TIMER
+        rgblight_timer_disable();
+#endif
+    } else {
+#ifdef RGBLIGHT_USE_TIMER
+        rgblight_timer_enable();
+#endif
+    }
+#ifdef RGBLIGHT_USE_TIMER
+    animation_status.restart = true;
+#endif
+    rgblight_sethsv_noeeprom(rgblight_config.hue, rgblight_config.sat, rgblight_config.val);
 }
 
-void rgblight_mode_noeeprom(uint8_t mode) {
-  rgblight_mode_eeprom_helper(mode, false);
-}
+void rgblight_mode(uint8_t mode) { rgblight_mode_eeprom_helper(mode, true); }
 
+void rgblight_mode_noeeprom(uint8_t mode) { rgblight_mode_eeprom_helper(mode, false); }
 
 void rgblight_toggle(void) {
-  xprintf("rgblight toggle [EEPROM]: rgblight_config.enable = %u\n", !rgblight_config.enable);
-  if (rgblight_config.enable) {
-    rgblight_disable();
-  }
-  else {
-    rgblight_enable();
-  }
+    dprintf("rgblight toggle [EEPROM]: rgblight_config.enable = %u\n", !rgblight_config.enable);
+    if (rgblight_config.enable) {
+        rgblight_disable();
+    } else {
+        rgblight_enable();
+    }
 }
 
 void rgblight_toggle_noeeprom(void) {
-  xprintf("rgblight toggle [NOEEPROM]: rgblight_config.enable = %u\n", !rgblight_config.enable);
-  if (rgblight_config.enable) {
-    rgblight_disable_noeeprom();
-  }
-  else {
-    rgblight_enable_noeeprom();
-  }
+    dprintf("rgblight toggle [NOEEPROM]: rgblight_config.enable = %u\n", !rgblight_config.enable);
+    if (rgblight_config.enable) {
+        rgblight_disable_noeeprom();
+    } else {
+        rgblight_enable_noeeprom();
+    }
 }
 
 void rgblight_enable(void) {
-  rgblight_config.enable = 1;
-  // No need to update EEPROM here. rgblight_mode() will do that, actually
-  //eeconfig_update_rgblight(rgblight_config.raw);
-  xprintf("rgblight enable [EEPROM]: rgblight_config.enable = %u\n", rgblight_config.enable);
-  rgblight_mode(rgblight_config.mode);
+    rgblight_config.enable = 1;
+    // No need to update EEPROM here. rgblight_mode() will do that, actually
+    // eeconfig_update_rgblight(rgblight_config.raw);
+    dprintf("rgblight enable [EEPROM]: rgblight_config.enable = %u\n", rgblight_config.enable);
+    rgblight_mode(rgblight_config.mode);
 }
 
 void rgblight_enable_noeeprom(void) {
-  rgblight_config.enable = 1;
-  xprintf("rgblight enable [NOEEPROM]: rgblight_config.enable = %u\n", rgblight_config.enable);
-  rgblight_mode_noeeprom(rgblight_config.mode);
+    rgblight_config.enable = 1;
+    dprintf("rgblight enable [NOEEPROM]: rgblight_config.enable = %u\n", rgblight_config.enable);
+    rgblight_mode_noeeprom(rgblight_config.mode);
 }
 
 void rgblight_disable(void) {
-  rgblight_config.enable = 0;
-  eeconfig_update_rgblight(rgblight_config.raw);
-  xprintf("rgblight disable [EEPROM]: rgblight_config.enable = %u\n", rgblight_config.enable);
-  #ifdef RGBLIGHT_ANIMATIONS
-    //rgblight_timer_disable();
-  #endif
-  _delay_ms(50);
-  rgblight_set();
+    rgblight_config.enable = 0;
+    eeconfig_update_rgblight(rgblight_config.raw);
+    dprintf("rgblight disable [EEPROM]: rgblight_config.enable = %u\n", rgblight_config.enable);
+#ifdef RGBLIGHT_USE_TIMER
+    rgblight_timer_disable();
+#endif
+    RGBLIGHT_SPLIT_SET_CHANGE_MODE;
+    wait_ms(50);
+    rgblight_set();
 }
 
 void rgblight_disable_noeeprom(void) {
-  rgblight_config.enable = 0;
-  xprintf("rgblight disable [noEEPROM]: rgblight_config.enable = %u\n", rgblight_config.enable);
-  #ifdef RGBLIGHT_ANIMATIONS
+    rgblight_config.enable = 0;
+    dprintf("rgblight disable [NOEEPROM]: rgblight_config.enable = %u\n", rgblight_config.enable);
+#ifdef RGBLIGHT_USE_TIMER
     rgblight_timer_disable();
-  #endif
-  _delay_ms(50);
-  rgblight_set();
+#endif
+    RGBLIGHT_SPLIT_SET_CHANGE_MODE;
+    wait_ms(50);
+    rgblight_set();
 }
 
-
-// Deals with the messy details of incrementing an integer
-uint8_t increment( uint8_t value, uint8_t step, uint8_t min, uint8_t max ) {
-    int16_t new_value = value;
-    new_value += step;
-    return MIN( MAX( new_value, min ), max );
+void rgblight_increase_hue_helper(bool write_to_eeprom) {
+    uint8_t hue = rgblight_config.hue + RGBLIGHT_HUE_STEP;
+    rgblight_sethsv_eeprom_helper(hue, rgblight_config.sat, rgblight_config.val, write_to_eeprom);
 }
-
-uint8_t decrement( uint8_t value, uint8_t step, uint8_t min, uint8_t max ) {
-    int16_t new_value = value;
-    new_value -= step;
-    return MIN( MAX( new_value, min ), max );
+void rgblight_increase_hue_noeeprom(void) { rgblight_increase_hue_helper(false); }
+void rgblight_increase_hue(void) { rgblight_increase_hue_helper(true); }
+void rgblight_decrease_hue_helper(bool write_to_eeprom) {
+    uint8_t hue = rgblight_config.hue - RGBLIGHT_HUE_STEP;
+    rgblight_sethsv_eeprom_helper(hue, rgblight_config.sat, rgblight_config.val, write_to_eeprom);
 }
-
-void rgblight_increase_hue(void) {
-  uint16_t hue;
-  hue = (rgblight_config.hue+RGBLIGHT_HUE_STEP) % 360;
-  rgblight_sethsv(hue, rgblight_config.sat, rgblight_config.val);
+void rgblight_decrease_hue_noeeprom(void) { rgblight_decrease_hue_helper(false); }
+void rgblight_decrease_hue(void) { rgblight_decrease_hue_helper(true); }
+void rgblight_increase_sat_helper(bool write_to_eeprom) {
+    uint8_t sat = qadd8(rgblight_config.sat, RGBLIGHT_SAT_STEP);
+    rgblight_sethsv_eeprom_helper(rgblight_config.hue, sat, rgblight_config.val, write_to_eeprom);
 }
-void rgblight_decrease_hue(void) {
-  uint16_t hue;
-  if (rgblight_config.hue-RGBLIGHT_HUE_STEP < 0) {
-    hue = (rgblight_config.hue + 360 - RGBLIGHT_HUE_STEP) % 360;
-  } else {
-    hue = (rgblight_config.hue - RGBLIGHT_HUE_STEP) % 360;
-  }
-  rgblight_sethsv(hue, rgblight_config.sat, rgblight_config.val);
-}
-void rgblight_increase_sat(void) {
-  uint8_t sat;
-  if (rgblight_config.sat + RGBLIGHT_SAT_STEP > 255) {
-    sat = 255;
-  } else {
-    sat = rgblight_config.sat + RGBLIGHT_SAT_STEP;
-  }
-  rgblight_sethsv(rgblight_config.hue, sat, rgblight_config.val);
-}
-void rgblight_decrease_sat(void) {
-  uint8_t sat;
-  if (rgblight_config.sat - RGBLIGHT_SAT_STEP < 0) {
-    sat = 0;
-  } else {
-    sat = rgblight_config.sat - RGBLIGHT_SAT_STEP;
-  }
-  rgblight_sethsv(rgblight_config.hue, sat, rgblight_config.val);
-}
-void rgblight_increase_val(void) {
-  uint8_t val;
-  if (rgblight_config.val + RGBLIGHT_VAL_STEP > RGBLIGHT_LIMIT_VAL) {
-    val = RGBLIGHT_LIMIT_VAL;
-  } else {
-    val = rgblight_config.val + RGBLIGHT_VAL_STEP;
-  }
-  rgblight_sethsv(rgblight_config.hue, rgblight_config.sat, val);
-}
-void rgblight_decrease_val(void) {
-  uint8_t val;
-  if (rgblight_config.val - RGBLIGHT_VAL_STEP < 0) {
-    val = 0;
-  } else {
-    val = rgblight_config.val - RGBLIGHT_VAL_STEP;
-  }
-  rgblight_sethsv(rgblight_config.hue, rgblight_config.sat, val);
+void rgblight_increase_sat_noeeprom(void) { rgblight_increase_sat_helper(false); }
+void rgblight_increase_sat(void) { rgblight_increase_sat_helper(true); }
+void rgblight_decrease_sat_helper(bool write_to_eeprom) {
+    uint8_t sat = qsub8(rgblight_config.sat, RGBLIGHT_SAT_STEP);
+    rgblight_sethsv_eeprom_helper(rgblight_config.hue, sat, rgblight_config.val, write_to_eeprom);
+}
+void rgblight_decrease_sat_noeeprom(void) { rgblight_decrease_sat_helper(false); }
+void rgblight_decrease_sat(void) { rgblight_decrease_sat_helper(true); }
+void rgblight_increase_val_helper(bool write_to_eeprom) {
+    uint8_t val = qadd8(rgblight_config.val, RGBLIGHT_VAL_STEP);
+    rgblight_sethsv_eeprom_helper(rgblight_config.hue, rgblight_config.sat, val, write_to_eeprom);
+}
+void rgblight_increase_val_noeeprom(void) { rgblight_increase_val_helper(false); }
+void rgblight_increase_val(void) { rgblight_increase_val_helper(true); }
+void rgblight_decrease_val_helper(bool write_to_eeprom) {
+    uint8_t val = qsub8(rgblight_config.val, RGBLIGHT_VAL_STEP);
+    rgblight_sethsv_eeprom_helper(rgblight_config.hue, rgblight_config.sat, val, write_to_eeprom);
 }
+void rgblight_decrease_val_noeeprom(void) { rgblight_decrease_val_helper(false); }
+void rgblight_decrease_val(void) { rgblight_decrease_val_helper(true); }
 void rgblight_increase_speed(void) {
-    rgblight_config.speed = increment( rgblight_config.speed, 1, 0, 3 );
-    eeconfig_update_rgblight(rgblight_config.raw);//EECONFIG needs to be increased to support this
+    if (rgblight_config.speed < 3) rgblight_config.speed++;
+    // RGBLIGHT_SPLIT_SET_CHANGE_HSVS; // NEED?
+    eeconfig_update_rgblight(rgblight_config.raw);  // EECONFIG needs to be increased to support this
 }
 
 void rgblight_decrease_speed(void) {
-    rgblight_config.speed = decrement( rgblight_config.speed, 1, 0, 3 );
-    eeconfig_update_rgblight(rgblight_config.raw);//EECONFIG needs to be increased to support this
+    if (rgblight_config.speed > 0) rgblight_config.speed--;
+    // RGBLIGHT_SPLIT_SET_CHANGE_HSVS; // NEED??
+    eeconfig_update_rgblight(rgblight_config.raw);  // EECONFIG needs to be increased to support this
 }
 
-void rgblight_sethsv_noeeprom_old(uint16_t hue, uint8_t sat, uint8_t val) {
-  if (rgblight_config.enable) {
-    LED_TYPE tmp_led;
-    sethsv(hue, sat, val, &tmp_led);
-    fled_hs[0].hue = fled_hs[1].hue = hue;
-    fled_hs[0].sat = fled_hs[1].sat = sat;
-    // dprintf("rgblight set hue [MEMORY]: %u,%u,%u\n", inmem_config.hue, inmem_config.sat, inmem_config.val);
-    rgblight_setrgb(tmp_led.r, tmp_led.g, tmp_led.b);
-  }
+void rgblight_sethsv_noeeprom_old(uint8_t hue, uint8_t sat, uint8_t val) {
+    if (rgblight_config.enable) {
+        // MxSS custom code
+        fled_hs[0].hue = fled_hs[1].hue = hue;
+        fled_hs[0].sat = fled_hs[1].sat = sat;
+
+        LED_TYPE tmp_led;
+        sethsv(hue, sat, val, &tmp_led);
+        rgblight_setrgb(tmp_led.r, tmp_led.g, tmp_led.b);
+    }
 }
 
-void rgblight_sethsv_eeprom_helper(uint16_t hue, uint8_t sat, uint8_t val, bool write_to_eeprom) {
-  if (rgblight_config.enable) {
-    if (rgblight_config.mode == 1) {
-      // same static color
-      LED_TYPE tmp_led;
-      sethsv(hue, sat, val, &tmp_led);
-      
-      fled_hs[0].hue = fled_hs[1].hue = hue;
-      fled_hs[0].sat = fled_hs[1].sat = sat;
-      
-      rgblight_setrgb(tmp_led.r, tmp_led.g, tmp_led.b);
-    } else {
-      // all LEDs in same color
-      if (rgblight_config.mode >= 2 && rgblight_config.mode <= 5) {
-        // breathing mode, ignore the change of val, use in memory value instead
-        val = rgblight_config.val;
-      } else if (rgblight_config.mode >= 6 && rgblight_config.mode <= 14) {
-        // rainbow mood and rainbow swirl, ignore the change of hue
-        hue = rgblight_config.hue;
-      } else if (rgblight_config.mode >= 25 && rgblight_config.mode <= 34) {
-        // static gradient
-        uint16_t _hue;
-        int8_t direction = ((rgblight_config.mode - 25) % 2) ? -1 : 1;
-        uint16_t range = pgm_read_word(&RGBLED_GRADIENT_RANGES[(rgblight_config.mode - 25) / 2]);
-        for (uint8_t i = 0; i < RGBLED_NUM; i++) {
-          _hue = (range / RGBLED_NUM * i * direction + hue + 360) % 360;
-          dprintf("rgblight rainbow set hsv: %u,%u,%d,%u\n", i, _hue, direction, range);
-          sethsv(_hue, sat, val, (LED_TYPE *)&led[i]);
+void rgblight_sethsv_eeprom_helper(uint8_t hue, uint8_t sat, uint8_t val, bool write_to_eeprom) {
+    if (rgblight_config.enable) {
+        rgblight_status.base_mode = mode_base_table[rgblight_config.mode];
+        if (rgblight_config.mode == RGBLIGHT_MODE_STATIC_LIGHT) {
+            // same static color
+            LED_TYPE tmp_led;
+            sethsv(hue, sat, val, &tmp_led);
+
+            // MxSS custom
+            // Cache hue/sat for rgb
+            fled_hs[0].hue = fled_hs[1].hue = hue;
+            fled_hs[0].sat = fled_hs[1].sat = sat;
+
+            rgblight_setrgb(tmp_led.r, tmp_led.g, tmp_led.b);
+        } else {
+            // all LEDs in same color
+            if (1 == 0) {  // dummy
+            }
+#ifdef RGBLIGHT_EFFECT_BREATHING
+            else if (rgblight_status.base_mode == RGBLIGHT_MODE_BREATHING) {
+                // breathing mode, ignore the change of val, use in memory value instead
+                val = rgblight_config.val;
+            }
+#endif
+#ifdef RGBLIGHT_EFFECT_RAINBOW_MOOD
+            else if (rgblight_status.base_mode == RGBLIGHT_MODE_RAINBOW_MOOD) {
+                // rainbow mood, ignore the change of hue
+                hue = rgblight_config.hue;
+            }
+#endif
+#ifdef RGBLIGHT_EFFECT_RAINBOW_SWIRL
+            else if (rgblight_status.base_mode == RGBLIGHT_MODE_RAINBOW_SWIRL) {
+                // rainbow swirl, ignore the change of hue
+                hue = rgblight_config.hue;
+            }
+#endif
+#ifdef RGBLIGHT_EFFECT_STATIC_GRADIENT
+            else if (rgblight_status.base_mode == RGBLIGHT_MODE_STATIC_GRADIENT) {
+                // static gradient
+                uint8_t delta     = rgblight_config.mode - rgblight_status.base_mode;
+                bool    direction = (delta % 2) == 0;
+#    ifdef __AVR__
+                // probably due to how pgm_read_word is defined for ARM, but the ARM compiler really hates this line
+                uint8_t range = pgm_read_word(&RGBLED_GRADIENT_RANGES[delta / 2]);
+#    else
+                uint8_t range = RGBLED_GRADIENT_RANGES[delta / 2];
+#    endif
+                for (uint8_t i = 0; i < effect_num_leds; i++) {
+                    uint8_t _hue = ((uint16_t)i * (uint16_t)range) / effect_num_leds;
+                    if (direction) {
+                        _hue = hue + _hue;
+                    } else {
+                        _hue = hue - _hue;
+                    }
+                    dprintf("rgblight rainbow set hsv: %d,%d,%d,%u\n", i, _hue, direction, range);
+                    sethsv(_hue, sat, val, (LED_TYPE *)&led[i + effect_start_pos]);
+                }
+                rgblight_set();
+            }
+#endif
+        }
+#ifdef RGBLIGHT_SPLIT
+        if (rgblight_config.hue != hue || rgblight_config.sat != sat || rgblight_config.val != val) {
+            RGBLIGHT_SPLIT_SET_CHANGE_HSVS;
+        }
+#endif
+        rgblight_config.hue = hue;
+        rgblight_config.sat = sat;
+        rgblight_config.val = val;
+        if (write_to_eeprom) {
+            eeconfig_update_rgblight(rgblight_config.raw);
+            dprintf("rgblight set hsv [EEPROM]: %u,%u,%u\n", rgblight_config.hue, rgblight_config.sat, rgblight_config.val);
+        } else {
+            dprintf("rgblight set hsv [NOEEPROM]: %u,%u,%u\n", rgblight_config.hue, rgblight_config.sat, rgblight_config.val);
         }
-        rgblight_set();
-      }
-    }
-    rgblight_config.hue = hue;
-    rgblight_config.sat = sat;
-    rgblight_config.val = val;
-    if (write_to_eeprom) {
-      eeconfig_update_rgblight(rgblight_config.raw);
-      xprintf("rgblight set hsv [EEPROM]: %u,%u,%u\n", rgblight_config.hue, rgblight_config.sat, rgblight_config.val);
-    } else {
-      xprintf("rgblight set hsv [NOEEPROM]: %u,%u,%u\n", rgblight_config.hue, rgblight_config.sat, rgblight_config.val);
     }
-  }
 }
 
-void rgblight_sethsv(uint16_t hue, uint8_t sat, uint8_t val) {
-  rgblight_sethsv_eeprom_helper(hue, sat, val, true);
-}
+void rgblight_sethsv(uint8_t hue, uint8_t sat, uint8_t val) { rgblight_sethsv_eeprom_helper(hue, sat, val, true); }
 
-void rgblight_sethsv_noeeprom(uint16_t hue, uint8_t sat, uint8_t val) {
-  rgblight_sethsv_eeprom_helper(hue, sat, val, false);
-}
+void rgblight_sethsv_noeeprom(uint8_t hue, uint8_t sat, uint8_t val) { rgblight_sethsv_eeprom_helper(hue, sat, val, false); }
 
-uint16_t rgblight_get_hue(void) {
-  return rgblight_config.hue;
+uint8_t rgblight_get_hue(void) { return rgblight_config.hue; }
+
+uint8_t rgblight_get_sat(void) { return rgblight_config.sat; }
+
+uint8_t rgblight_get_val(void) { return rgblight_config.val; }
+
+void rgblight_setrgb(uint8_t r, uint8_t g, uint8_t b) {
+    if (!rgblight_config.enable) {
+        return;
+    }
+
+    for (uint8_t i = effect_start_pos; i < effect_end_pos; i++) {
+        led[i].r = r;
+        led[i].g = g;
+        led[i].b = b;
+#ifdef RGBW
+        led[i].w = 0;
+#endif
+    }
+    rgblight_set();
 }
 
-uint8_t rgblight_get_sat(void) {
-  return rgblight_config.sat;
+void rgblight_setrgb_at(uint8_t r, uint8_t g, uint8_t b, uint8_t index) {
+    if (!rgblight_config.enable || index >= RGBLED_NUM) {
+        return;
+    }
+
+    led[index].r = r;
+    led[index].g = g;
+    led[index].b = b;
+#ifdef RGBW
+    led[index].w = 0;
+#endif
+    rgblight_set();
 }
 
-uint8_t rgblight_get_val(void) {
-  return rgblight_config.val;
+void rgblight_sethsv_at(uint8_t hue, uint8_t sat, uint8_t val, uint8_t index) {
+    if (!rgblight_config.enable) {
+        return;
+    }
+
+    LED_TYPE tmp_led;
+    sethsv(hue, sat, val, &tmp_led);
+    rgblight_setrgb_at(tmp_led.r, tmp_led.g, tmp_led.b, index);
 }
 
-void rgblight_setrgb(uint8_t r, uint8_t g, uint8_t b) {
-  if (!rgblight_config.enable) { return; }
+#if defined(RGBLIGHT_EFFECT_BREATHING) || defined(RGBLIGHT_EFFECT_RAINBOW_MOOD) || defined(RGBLIGHT_EFFECT_RAINBOW_SWIRL) || defined(RGBLIGHT_EFFECT_SNAKE) || defined(RGBLIGHT_EFFECT_KNIGHT)
 
-  for (uint8_t i = 0; i < RGBLED_NUM; i++) {
-    led[i].r = r;
-    led[i].g = g;
-    led[i].b = b;
-  }
-  rgblight_set();
+static uint8_t get_interval_time(const uint8_t *default_interval_address, uint8_t velocikey_min, uint8_t velocikey_max) {
+    return
+#    ifdef VELOCIKEY_ENABLE
+        velocikey_enabled() ? velocikey_match_speed(velocikey_min, velocikey_max) :
+#    endif
+                            pgm_read_byte(default_interval_address);
 }
 
-void rgblight_setrgb_at(uint8_t r, uint8_t g, uint8_t b, uint8_t index) {
-  if (!rgblight_config.enable || index >= RGBLED_NUM) { return; }
+#endif
+
+void rgblight_setrgb_range(uint8_t r, uint8_t g, uint8_t b, uint8_t start, uint8_t end) {
+    if (!rgblight_config.enable || start < 0 || start >= end || end > RGBLED_NUM) {
+        return;
+    }
 
-  led[index].r = r;
-  led[index].g = g;
-  led[index].b = b;
-  rgblight_set();
+    for (uint8_t i = start; i < end; i++) {
+        led[i].r = r;
+        led[i].g = g;
+        led[i].b = b;
+#ifdef RGBW
+        led[i].w = 0;
+#endif
+    }
+    rgblight_set();
+    wait_ms(1);
 }
 
-void rgblight_sethsv_at(uint16_t hue, uint8_t sat, uint8_t val, uint8_t index) {
-  if (!rgblight_config.enable) { return; }
+void rgblight_sethsv_range(uint8_t hue, uint8_t sat, uint8_t val, uint8_t start, uint8_t end) {
+    if (!rgblight_config.enable) {
+        return;
+    }
 
-  LED_TYPE tmp_led;
-  sethsv(hue, sat, val, &tmp_led);
-  rgblight_setrgb_at(tmp_led.r, tmp_led.g, tmp_led.b, index);
+    LED_TYPE tmp_led;
+    sethsv(hue, sat, val, &tmp_led);
+    rgblight_setrgb_range(tmp_led.r, tmp_led.g, tmp_led.b, start, end);
 }
 
+#ifndef RGBLIGHT_SPLIT
+void rgblight_setrgb_master(uint8_t r, uint8_t g, uint8_t b) { rgblight_setrgb_range(r, g, b, 0, (uint8_t)RGBLED_NUM / 2); }
+
+void rgblight_setrgb_slave(uint8_t r, uint8_t g, uint8_t b) { rgblight_setrgb_range(r, g, b, (uint8_t)RGBLED_NUM / 2, (uint8_t)RGBLED_NUM); }
+
+void rgblight_sethsv_master(uint8_t hue, uint8_t sat, uint8_t val) { rgblight_sethsv_range(hue, sat, val, 0, (uint8_t)RGBLED_NUM / 2); }
+
+void rgblight_sethsv_slave(uint8_t hue, uint8_t sat, uint8_t val) { rgblight_sethsv_range(hue, sat, val, (uint8_t)RGBLED_NUM / 2, (uint8_t)RGBLED_NUM); }
+#endif  // ifndef RGBLIGHT_SPLIT
+
+#ifndef RGBLIGHT_CUSTOM_DRIVER
 void rgblight_set(void) {
-  if (!rgblight_config.enable) {
+    LED_TYPE *start_led;
+    uint16_t  num_leds = clipping_num_leds;
+
+    if (!rgblight_config.enable) {
+        for (uint8_t i = effect_start_pos; i < effect_end_pos; i++) {
+            if (i == RGBLIGHT_FLED1 && i == RGBLIGHT_FLED2)
+                continue;
+
+            led[i].r = 0;
+            led[i].g = 0;
+            led[i].b = 0;
+#    ifdef RGBW
+            led[i].w = 0;
+#    endif
+        }
+    }
+
+#    ifdef RGBLIGHT_LED_MAP
+    LED_TYPE led0[RGBLED_NUM];
     for (uint8_t i = 0; i < RGBLED_NUM; i++) {
-      if (i == RGBLIGHT_FLED1 && i == RGBLIGHT_FLED2)
-          continue;
-      
-      led[i].r = 0;
-      led[i].g = 0;
-      led[i].b = 0;
+        led0[i] = led[pgm_read_byte(&led_map[i])];
     }
-  }
-  
-  switch (fled_mode) {
+    start_led = led0 + clipping_start_pos;
+#    else
+    start_led = led + clipping_start_pos;
+#    endif
+
+#ifdef RGBW
+    for (uint8_t i = 0; i < num_leds; i++) {
+        convert_rgb_to_rgbw(&start_led[i]);
+    }
+#endif
+    // MxSS custom
+    switch (fled_mode) {
       case FLED_OFF:
-      setrgb(0, 0, 0, &led[RGBLIGHT_FLED1]);
-      setrgb(0, 0, 0, &led[RGBLIGHT_FLED2]);
+        setrgb(0, 0, 0, &led[RGBLIGHT_FLED1]);
+        setrgb(0, 0, 0, &led[RGBLIGHT_FLED2]);
       break;
-      
+
       case FLED_INDI:
-      copyrgb(&fleds[0], &led[RGBLIGHT_FLED1]);
-      copyrgb(&fleds[1], &led[RGBLIGHT_FLED2]);
+        copyrgb(&fleds[0], &led[RGBLIGHT_FLED1]);
+        copyrgb(&fleds[1], &led[RGBLIGHT_FLED2]);
       break;
-      
+
       case FLED_RGB:
-      if (fled_hs[0].hue == 0 && fled_hs[0].hue == 0 && (rgblight_config.mode >= 15 && rgblight_config.mode <= 23))
-          setrgb(0, 0, 0, &led[RGBLIGHT_FLED1]);
-      else
-        sethsv(fled_hs[0].hue, fled_hs[0].sat, fled_val, &led[RGBLIGHT_FLED1]);
-      
-      if (fled_hs[1].hue == 0 && fled_hs[1].hue == 0 && (rgblight_config.mode >= 15 && rgblight_config.mode <= 23))
-          setrgb(0, 0, 0, &led[RGBLIGHT_FLED2]);
-      else
-          sethsv(fled_hs[1].hue, fled_hs[1].sat, fled_val, &led[RGBLIGHT_FLED2]);
+        if (fled_hs[0].hue == 0 && fled_hs[0].hue == 0 &&
+                (rgblight_status.base_mode == RGBLIGHT_MODE_SNAKE ||
+                rgblight_status.base_mode == RGBLIGHT_MODE_KNIGHT))
+            setrgb(0, 0, 0, &led[RGBLIGHT_FLED1]);
+        else
+            sethsv(fled_hs[0].hue, fled_hs[0].sat, fled_val, &led[RGBLIGHT_FLED1]);
+
+        if (fled_hs[1].hue == 0 && fled_hs[1].hue == 0 &&
+                (rgblight_status.base_mode == RGBLIGHT_MODE_SNAKE ||
+                rgblight_status.base_mode == RGBLIGHT_MODE_KNIGHT))
+            setrgb(0, 0, 0, &led[RGBLIGHT_FLED2]);
+        else
+            sethsv(fled_hs[1].hue, fled_hs[1].sat, fled_val, &led[RGBLIGHT_FLED2]);
       break;
-      
+
       default:
       break;
   }
 
-   ws2812_setleds(led, RGBLED_NUM);
+   ws2812_setleds(start_led, num_leds);
+}
+#endif
+
+#ifdef RGBLIGHT_SPLIT
+/* for split keyboard master side */
+uint8_t rgblight_get_change_flags(void) { return rgblight_status.change_flags; }
+
+void rgblight_clear_change_flags(void) { rgblight_status.change_flags = 0; }
+
+void rgblight_get_syncinfo(rgblight_syncinfo_t *syncinfo) {
+    syncinfo->config = rgblight_config;
+    syncinfo->status = rgblight_status;
+}
+
+/* for split keyboard slave side */
+void rgblight_update_sync(rgblight_syncinfo_t *syncinfo, bool write_to_eeprom) {
+    if (syncinfo->status.change_flags & RGBLIGHT_STATUS_CHANGE_MODE) {
+        if (syncinfo->config.enable) {
+            rgblight_config.enable = 1;  // == rgblight_enable_noeeprom();
+            rgblight_mode_eeprom_helper(syncinfo->config.mode, write_to_eeprom);
+        } else {
+            rgblight_disable_noeeprom();
+        }
+    }
+    if (syncinfo->status.change_flags & RGBLIGHT_STATUS_CHANGE_HSVS) {
+        rgblight_sethsv_eeprom_helper(syncinfo->config.hue, syncinfo->config.sat, syncinfo->config.val, write_to_eeprom);
+        // rgblight_config.speed = config->speed; // NEED???
+    }
+#    ifdef RGBLIGHT_USE_TIMER
+    if (syncinfo->status.change_flags & RGBLIGHT_STATUS_CHANGE_TIMER) {
+        if (syncinfo->status.timer_enabled) {
+            rgblight_timer_enable();
+        } else {
+            rgblight_timer_disable();
+        }
+    }
+#        ifndef RGBLIGHT_SPLIT_NO_ANIMATION_SYNC
+    if (syncinfo->status.change_flags & RGBLIGHT_STATUS_ANIMATION_TICK) {
+        animation_status.restart = true;
+    }
+#        endif /* RGBLIGHT_SPLIT_NO_ANIMATION_SYNC */
+#    endif     /* RGBLIGHT_USE_TIMER */
 }
+#endif /* RGBLIGHT_SPLIT */
 
-#ifdef RGBLIGHT_ANIMATIONS
+#ifdef RGBLIGHT_USE_TIMER
 
-// Animation timer -- AVR Timer3
+typedef void (*effect_func_t)(animation_status_t *anim);
+
+// Animation timer -- use system timer (AVR Timer0)
 void rgblight_timer_init(void) {
-  // static uint8_t rgblight_timer_is_init = 0;
-  // if (rgblight_timer_is_init) {
-  //   return;
-  // }
-  // rgblight_timer_is_init = 1;
-  // /* Timer 3 setup */
-  // TCCR3B = _BV(WGM32) // CTC mode OCR3A as TOP
-  //       | _BV(CS30); // Clock selelct: clk/1
-  // /* Set TOP value */
-  // uint8_t sreg = SREG;
-  // cli();
-  // OCR3AH = (RGBLED_TIMER_TOP >> 8) & 0xff;
-  // OCR3AL = RGBLED_TIMER_TOP & 0xff;
-  // SREG = sreg;
-
-  rgblight_timer_enabled = true;
+    // OLD!!!! Animation timer -- AVR Timer3
+    // static uint8_t rgblight_timer_is_init = 0;
+    // if (rgblight_timer_is_init) {
+    //   return;
+    // }
+    // rgblight_timer_is_init = 1;
+    // /* Timer 3 setup */
+    // TCCR3B = _BV(WGM32) // CTC mode OCR3A as TOP
+    //       | _BV(CS30); // Clock selelct: clk/1
+    // /* Set TOP value */
+    // uint8_t sreg = SREG;
+    // cli();
+    // OCR3AH = (RGBLED_TIMER_TOP >> 8) & 0xff;
+    // OCR3AL = RGBLED_TIMER_TOP & 0xff;
+    // SREG = sreg;
+
+    rgblight_status.timer_enabled = false;
+    RGBLIGHT_SPLIT_SET_CHANGE_TIMER_ENABLE;
 }
 void rgblight_timer_enable(void) {
-  rgblight_timer_enabled = true;
-  dprintf("TIMER3 enabled.\n");
+    if (!is_static_effect(rgblight_config.mode)) {
+        rgblight_status.timer_enabled = true;
+    }
+    animation_status.last_timer = timer_read();
+    RGBLIGHT_SPLIT_SET_CHANGE_TIMER_ENABLE;
+    dprintf("rgblight timer enabled.\n");
 }
 void rgblight_timer_disable(void) {
-  rgblight_timer_enabled = false;
-  dprintf("TIMER3 disabled.\n");
+    // MxSS custom code
+    if (fled_mode != FLED_RGB) {
+        rgblight_status.timer_enabled = false;
+        RGBLIGHT_SPLIT_SET_CHANGE_TIMER_ENABLE;
+        dprintf("rgblight timer disable.\n");
+    }
 }
 void rgblight_timer_toggle(void) {
-  rgblight_timer_enabled ^= rgblight_timer_enabled;
-  dprintf("TIMER3 toggled.\n");
+    dprintf("rgblight timer toggle.\n");
+    if (rgblight_status.timer_enabled) {
+        rgblight_timer_disable();
+    } else {
+        rgblight_timer_enable();
+    }
 }
 
 void rgblight_show_solid_color(uint8_t r, uint8_t g, uint8_t b) {
-  rgblight_enable();
-  rgblight_mode(1);
-  rgblight_setrgb(r, g, b);
+    rgblight_enable();
+    rgblight_mode(RGBLIGHT_MODE_STATIC_LIGHT);
+    rgblight_setrgb(r, g, b);
+}
+
+static void rgblight_effect_dummy(animation_status_t *anim) {
+    // do nothing
+    /********
+    dprintf("rgblight_task() what happened?\n");
+    dprintf("is_static_effect %d\n", is_static_effect(rgblight_config.mode));
+    dprintf("mode = %d, base_mode = %d, timer_enabled %d, ",
+            rgblight_config.mode, rgblight_status.base_mode,
+            rgblight_status.timer_enabled);
+    dprintf("last_timer = %d\n",anim->last_timer);
+    **/
 }
 
 void rgblight_task(void) {
-  if (rgblight_timer_enabled) {
-    // mode = 1, static light, do nothing here
-    if (rgblight_config.mode >= 2 && rgblight_config.mode <= 5) {
-      // mode = 2 to 5, breathing mode
-      rgblight_effect_breathing(rgblight_config.mode - 2);
-    } else if (rgblight_config.mode >= 6 && rgblight_config.mode <= 8) {
-      // mode = 6 to 8, rainbow mood mod
-      rgblight_effect_rainbow_mood(rgblight_config.mode - 6);
-    } else if (rgblight_config.mode >= 9 && rgblight_config.mode <= 14) {
-      // mode = 9 to 14, rainbow swirl mode
-      rgblight_effect_rainbow_swirl(rgblight_config.mode - 9);
-    } else if (rgblight_config.mode >= 15 && rgblight_config.mode <= 20) {
-      // mode = 15 to 20, snake mode
-      rgblight_effect_snake(rgblight_config.mode - 15);
-    } else if (rgblight_config.mode >= 21 && rgblight_config.mode <= 23) {
-      // mode = 21 to 23, knight mode
-      rgblight_effect_knight(rgblight_config.mode - 21);
-    } else if (rgblight_config.mode == 24) {
-      // mode = 24, christmas mode
-      rgblight_effect_christmas();
-    } else if (rgblight_config.mode == 35) {
-      // mode = 35, RGB test
-      rgblight_effect_rgbtest();
+    if (rgblight_status.timer_enabled) {
+        effect_func_t effect_func   = rgblight_effect_dummy;
+        uint16_t      interval_time = 2000;  // dummy interval
+        uint8_t       delta         = rgblight_config.mode - rgblight_status.base_mode;
+        animation_status.delta      = delta;
+
+        // static light mode, do nothing here
+        if (1 == 0) {  // dummy
+        }
+#    ifdef RGBLIGHT_EFFECT_BREATHING
+        else if (rgblight_status.base_mode == RGBLIGHT_MODE_BREATHING) {
+            // breathing mode
+            interval_time = get_interval_time(&RGBLED_BREATHING_INTERVALS[delta], 1, 100);
+            effect_func   = rgblight_effect_breathing;
+        }
+#    endif
+#    ifdef RGBLIGHT_EFFECT_RAINBOW_MOOD
+        else if (rgblight_status.base_mode == RGBLIGHT_MODE_RAINBOW_MOOD) {
+            // rainbow mood mode
+            interval_time = get_interval_time(&RGBLED_RAINBOW_MOOD_INTERVALS[delta], 5, 100);
+            effect_func   = rgblight_effect_rainbow_mood;
+        }
+#    endif
+#    ifdef RGBLIGHT_EFFECT_RAINBOW_SWIRL
+        else if (rgblight_status.base_mode == RGBLIGHT_MODE_RAINBOW_SWIRL) {
+            // rainbow swirl mode
+            interval_time = get_interval_time(&RGBLED_RAINBOW_SWIRL_INTERVALS[delta / 2], 1, 100);
+            effect_func   = rgblight_effect_rainbow_swirl;
+        }
+#    endif
+#    ifdef RGBLIGHT_EFFECT_SNAKE
+        else if (rgblight_status.base_mode == RGBLIGHT_MODE_SNAKE) {
+            // snake mode
+            interval_time = get_interval_time(&RGBLED_SNAKE_INTERVALS[delta / 2], 1, 200);
+            effect_func   = rgblight_effect_snake;
+        }
+#    endif
+#    ifdef RGBLIGHT_EFFECT_KNIGHT
+        else if (rgblight_status.base_mode == RGBLIGHT_MODE_KNIGHT) {
+            // knight mode
+            interval_time = get_interval_time(&RGBLED_KNIGHT_INTERVALS[delta], 5, 100);
+            effect_func   = rgblight_effect_knight;
+        }
+#    endif
+#    ifdef RGBLIGHT_EFFECT_CHRISTMAS
+        else if (rgblight_status.base_mode == RGBLIGHT_MODE_CHRISTMAS) {
+            // christmas mode
+            interval_time = RGBLIGHT_EFFECT_CHRISTMAS_INTERVAL;
+            effect_func   = (effect_func_t)rgblight_effect_christmas;
+        }
+#    endif
+#    ifdef RGBLIGHT_EFFECT_RGB_TEST
+        else if (rgblight_status.base_mode == RGBLIGHT_MODE_RGB_TEST) {
+            // RGB test mode
+            interval_time = pgm_read_word(&RGBLED_RGBTEST_INTERVALS[0]);
+            effect_func   = (effect_func_t)rgblight_effect_rgbtest;
+        }
+#    endif
+#    ifdef RGBLIGHT_EFFECT_ALTERNATING
+        else if (rgblight_status.base_mode == RGBLIGHT_MODE_ALTERNATING) {
+            interval_time = 500;
+            effect_func   = (effect_func_t)rgblight_effect_alternating;
+        }
+#    endif
+        if (animation_status.restart) {
+            animation_status.restart    = false;
+            animation_status.last_timer = timer_read() - interval_time - 1;
+            animation_status.pos16      = 0;  // restart signal to local each effect
+        }
+        if (timer_elapsed(animation_status.last_timer) >= interval_time) {
+#    if defined(RGBLIGHT_SPLIT) && !defined(RGBLIGHT_SPLIT_NO_ANIMATION_SYNC)
+            static uint16_t report_last_timer = 0;
+            static bool     tick_flag         = false;
+            uint16_t        oldpos16;
+            if (tick_flag) {
+                tick_flag = false;
+                if (timer_elapsed(report_last_timer) >= 30000) {
+                    report_last_timer = timer_read();
+                    dprintf("rgblight animation tick report to slave\n");
+                    RGBLIGHT_SPLIT_ANIMATION_TICK;
+                }
+            }
+            oldpos16 = animation_status.pos16;
+#    endif
+            animation_status.last_timer += interval_time;
+            effect_func(&animation_status);
+#    if defined(RGBLIGHT_SPLIT) && !defined(RGBLIGHT_SPLIT_NO_ANIMATION_SYNC)
+            if (animation_status.pos16 == 0 && oldpos16 != 0) {
+                tick_flag = true;
+            }
+#    endif
+        }
     }
-  }
 }
 
-// Effects
-void rgblight_effect_breathing(uint8_t interval) {
-  static uint8_t pos = 0;
-  static uint16_t last_timer = 0;
-  float val;
+#endif /* RGBLIGHT_USE_TIMER */
 
-  if (timer_elapsed(last_timer) < pgm_read_byte(&RGBLED_BREATHING_INTERVALS[interval])) {
-    return;
-  }
-  last_timer = timer_read();
+// Effects
+#ifdef RGBLIGHT_EFFECT_BREATHING
+
+#    ifndef RGBLIGHT_EFFECT_BREATHE_CENTER
+#        ifndef RGBLIGHT_BREATHE_TABLE_SIZE
+#            define RGBLIGHT_BREATHE_TABLE_SIZE 256  // 256 or 128 or 64
+#        endif
+#        include <rgblight_breathe_table.h>
+#    endif
+
+__attribute__((weak)) const uint8_t RGBLED_BREATHING_INTERVALS[] PROGMEM = {30, 20, 10, 5};
+
+void rgblight_effect_breathing(animation_status_t *anim) {
+    float val;
+
+    // http://sean.voisen.org/blog/2011/10/breathing-led-with-arduino/
+#    ifdef RGBLIGHT_EFFECT_BREATHE_TABLE
+    val = pgm_read_byte(&rgblight_effect_breathe_table[anim->pos / table_scale]);
+#    else
+    val = (exp(sin((anim->pos / 255.0) * M_PI)) - RGBLIGHT_EFFECT_BREATHE_CENTER / M_E) * (RGBLIGHT_EFFECT_BREATHE_MAX / (M_E - 1 / M_E));
+#    endif
+    rgblight_sethsv_noeeprom_old(rgblight_config.hue, rgblight_config.sat, val);
+    anim->pos = (anim->pos + 1);
+}
+#endif
 
+#ifdef RGBLIGHT_EFFECT_RAINBOW_MOOD
+__attribute__((weak)) const uint8_t RGBLED_RAINBOW_MOOD_INTERVALS[] PROGMEM = {120, 60, 30};
 
-  // http://sean.voisen.org/blog/2011/10/breathing-led-with-arduino/
-  val = (exp(sin((pos/255.0)*M_PI)) - RGBLIGHT_EFFECT_BREATHE_CENTER/M_E)*(RGBLIGHT_EFFECT_BREATHE_MAX/(M_E-1/M_E));
-  rgblight_sethsv_noeeprom_old(rgblight_config.hue, rgblight_config.sat, val);
-  pos = (pos + 1) % 256;
+void rgblight_effect_rainbow_mood(animation_status_t *anim) {
+    rgblight_sethsv_noeeprom_old(anim->current_hue, rgblight_config.sat, rgblight_config.val);
+    anim->current_hue++;
 }
-void rgblight_effect_rainbow_mood(uint8_t interval) {
-  static uint16_t current_hue = 0;
-  static uint16_t last_timer = 0;
+#endif
 
-  if (timer_elapsed(last_timer) < pgm_read_byte(&RGBLED_RAINBOW_MOOD_INTERVALS[interval])) {
-    return;
-  }
-  last_timer = timer_read();
-  rgblight_sethsv_noeeprom_old(current_hue, rgblight_config.sat, rgblight_config.val);
-  current_hue = (current_hue + 1) % 360;
-}
-void rgblight_effect_rainbow_swirl(uint8_t interval) {
-  static uint16_t current_hue = 0;
-  static uint16_t last_timer = 0;
-  uint16_t hue;
-  uint8_t i;
-  if (timer_elapsed(last_timer) < pgm_read_byte(&RGBLED_RAINBOW_SWIRL_INTERVALS[interval / 2])) {
-    return;
-  }
-  last_timer = timer_read();
-  for (i = 0; i < RGBLED_NUM; i++) {
-    hue = (360 / RGBLED_NUM * i + current_hue) % 360;
-    sethsv(hue, rgblight_config.sat, rgblight_config.val, (LED_TYPE *)&led[i]);
-  }
-  rgblight_set();
+#ifdef RGBLIGHT_EFFECT_RAINBOW_SWIRL
+#    ifndef RGBLIGHT_RAINBOW_SWIRL_RANGE
+#        define RGBLIGHT_RAINBOW_SWIRL_RANGE 255
+#    endif
+
+__attribute__((weak)) const uint8_t RGBLED_RAINBOW_SWIRL_INTERVALS[] PROGMEM = {100, 50, 20};
+
+void rgblight_effect_rainbow_swirl(animation_status_t *anim) {
+    uint8_t hue;
+    uint8_t i;
+
+    for (i = 0; i < effect_num_leds; i++) {
+        hue = (RGBLIGHT_RAINBOW_SWIRL_RANGE / effect_num_leds * i + anim->current_hue);
+        sethsv(hue, rgblight_config.sat, rgblight_config.val, (LED_TYPE *)&led[i + effect_start_pos]);
+    }
+    rgblight_set();
 
-  if (interval % 2) {
-    current_hue = (current_hue + 1) % 360;
-  } else {
-    if (current_hue - 1 < 0) {
-      current_hue = 359;
+    if (anim->delta % 2) {
+        anim->current_hue++;
     } else {
-      current_hue = current_hue - 1;
+        anim->current_hue--;
     }
-  }
 }
-void rgblight_effect_snake(uint8_t interval) {
-  static uint8_t pos = 0;
-  static uint16_t last_timer = 0;
-  uint8_t i, j;
-  int8_t k;
-  int8_t increment = 1;
-  if (interval % 2) {
-    increment = -1;
-  }
-  if (timer_elapsed(last_timer) < pgm_read_byte(&RGBLED_SNAKE_INTERVALS[interval / 2])) {
-    return;
-  }
-  last_timer = timer_read();
-  
-  fled_hs[0].hue = fled_hs[1].hue = 0;
-  fled_hs[0].sat = fled_hs[1].sat = 0;
-  
-  for (i = 0; i < RGBLED_NUM; i++) {
-    led[i].r = 0;
-    led[i].g = 0;
-    led[i].b = 0;
-
-    for (j = 0; j < RGBLIGHT_EFFECT_SNAKE_LENGTH; j++) {
-      k = pos + j * increment;
-      if (k < 0) {
-        k = k + RGBLED_NUM;
-      }
-      if (i == k) {
-        sethsv(rgblight_config.hue, rgblight_config.sat, (uint8_t)(rgblight_config.val*(RGBLIGHT_EFFECT_SNAKE_LENGTH-j)/RGBLIGHT_EFFECT_SNAKE_LENGTH), (LED_TYPE *)&led[i]);
-      }
+#endif
+
+#ifdef RGBLIGHT_EFFECT_SNAKE
+__attribute__((weak)) const uint8_t RGBLED_SNAKE_INTERVALS[] PROGMEM = {100, 50, 20};
+
+void rgblight_effect_snake(animation_status_t *anim) {
+    static uint8_t pos = 0;
+    uint8_t        i, j;
+    int8_t         k;
+    int8_t         increment = 1;
+
+    if (anim->delta % 2) {
+        increment = -1;
     }
-  }
-  rgblight_set();
-  if (increment == 1) {
-    if (pos - 1 < 0) {
-      pos = RGBLED_NUM - 1;
+
+#    if defined(RGBLIGHT_SPLIT) && !defined(RGBLIGHT_SPLIT_NO_ANIMATION_SYNC)
+    if (anim->pos == 0) {  // restart signal
+        if (increment == 1) {
+            pos = effect_num_leds - 1;
+        } else {
+            pos = 0;
+        }
+        anim->pos = 1;
+    }
+#    endif
+
+    // MxSS custom
+    fled_hs[0].hue = fled_hs[1].hue = 0;
+    fled_hs[0].sat = fled_hs[1].sat = 0;
+
+    for (i = 0; i < effect_num_leds; i++) {
+        LED_TYPE *ledp = led + i + effect_start_pos;
+        ledp->r        = 0;
+        ledp->g        = 0;
+        ledp->b        = 0;
+#    ifdef RGBW
+        ledp->w = 0;
+#    endif
+        for (j = 0; j < RGBLIGHT_EFFECT_SNAKE_LENGTH; j++) {
+            k = pos + j * increment;
+            if (k > RGBLED_NUM) {
+                k = k % RGBLED_NUM;
+            }
+            if (k < 0) {
+                k = k + effect_num_leds;
+            }
+            if (i == k) {
+                sethsv(rgblight_config.hue, rgblight_config.sat, (uint8_t)(rgblight_config.val * (RGBLIGHT_EFFECT_SNAKE_LENGTH - j) / RGBLIGHT_EFFECT_SNAKE_LENGTH), ledp);
+            }
+        }
+    }
+    rgblight_set();
+    if (increment == 1) {
+        if (pos - 1 < 0) {
+            pos = effect_num_leds - 1;
+#    if defined(RGBLIGHT_SPLIT) && !defined(RGBLIGHT_SPLIT_NO_ANIMATION_SYNC)
+            anim->pos = 0;
+#    endif
+        } else {
+            pos -= 1;
+#    if defined(RGBLIGHT_SPLIT) && !defined(RGBLIGHT_SPLIT_NO_ANIMATION_SYNC)
+            anim->pos = 1;
+#    endif
+        }
     } else {
-      pos -= 1;
+        pos = (pos + 1) % effect_num_leds;
+#    if defined(RGBLIGHT_SPLIT) && !defined(RGBLIGHT_SPLIT_NO_ANIMATION_SYNC)
+        anim->pos = pos;
+#    endif
     }
-  } else {
-    pos = (pos + 1) % RGBLED_NUM;
-  }
 }
-void rgblight_effect_knight(uint8_t interval) {
-  static uint16_t last_timer = 0;
-  if (timer_elapsed(last_timer) < pgm_read_byte(&RGBLED_KNIGHT_INTERVALS[interval])) {
-    return;
-  }
-  last_timer = timer_read();
-
-  static int8_t low_bound = 0;
-  static int8_t high_bound = RGBLIGHT_EFFECT_KNIGHT_LENGTH - 1;
-  static int8_t increment = 1;
-  uint8_t i, cur;
-
-  // Set all the LEDs to 0
-  for (i = 0; i < RGBLED_NUM; i++) {
-    led[i].r = 0;
-    led[i].g = 0;
-    led[i].b = 0;
-  }
-  // Determine which LEDs should be lit up
-  for (i = 0; i < RGBLIGHT_EFFECT_KNIGHT_LED_NUM; i++) {
-    cur = (i + RGBLIGHT_EFFECT_KNIGHT_OFFSET) % RGBLED_NUM;
+#endif
 
-    if (i >= low_bound && i <= high_bound) {
-      sethsv(rgblight_config.hue, rgblight_config.sat, rgblight_config.val, (LED_TYPE *)&led[cur]);
-    } else {
-      if (i == RGBLIGHT_FLED1 || i == RGBLIGHT_FLED2) {
-          fled_hs[0].hue = fled_hs[1].hue = 0;
-          fled_hs[0].sat = fled_hs[1].sat = 0;
-      }
-        
-      led[cur].r = 0;
-      led[cur].g = 0;
-      led[cur].b = 0;
+#ifdef RGBLIGHT_EFFECT_KNIGHT
+__attribute__((weak)) const uint8_t RGBLED_KNIGHT_INTERVALS[] PROGMEM = {127, 63, 31};
+
+void rgblight_effect_knight(animation_status_t *anim) {
+    static int8_t low_bound  = 0;
+    static int8_t high_bound = RGBLIGHT_EFFECT_KNIGHT_LENGTH - 1;
+    static int8_t increment  = 1;
+    uint8_t       i, cur;
+
+#    if defined(RGBLIGHT_SPLIT) && !defined(RGBLIGHT_SPLIT_NO_ANIMATION_SYNC)
+    if (anim->pos == 0) {  // restart signal
+        anim->pos  = 1;
+        low_bound  = 0;
+        high_bound = RGBLIGHT_EFFECT_KNIGHT_LENGTH - 1;
+        increment  = 1;
+    }
+#    endif
+    // Set all the LEDs to 0
+    for (i = effect_start_pos; i < effect_end_pos; i++) {
+        led[i].r = 0;
+        led[i].g = 0;
+        led[i].b = 0;
+#    ifdef RGBW
+        led[i].w = 0;
+#    endif
+    }
+    // Determine which LEDs should be lit up
+    for (i = 0; i < RGBLIGHT_EFFECT_KNIGHT_LED_NUM; i++) {
+        cur = (i + RGBLIGHT_EFFECT_KNIGHT_OFFSET) % effect_num_leds + effect_start_pos;
+
+        if (i >= low_bound && i <= high_bound) {
+            sethsv(rgblight_config.hue, rgblight_config.sat, rgblight_config.val, (LED_TYPE *)&led[cur]);
+        } else {
+            // MxSS custom code
+            if (cur == RGBLIGHT_FLED1) {
+                fled_hs[0].hue = fled_hs[0].sat = 0;
+            } else if (cur == RGBLIGHT_FLED2) {
+                fled_hs[1].hue = fled_hs[1].sat = 0;
+            }
+
+            led[cur].r = 0;
+            led[cur].g = 0;
+            led[cur].b = 0;
+#    ifdef RGBW
+            led[cur].w = 0;
+#    endif
+        }
+    }
+    rgblight_set();
+
+    // Move from low_bound to high_bound changing the direction we increment each
+    // time a boundary is hit.
+    low_bound += increment;
+    high_bound += increment;
+
+    if (high_bound <= 0 || low_bound >= RGBLIGHT_EFFECT_KNIGHT_LED_NUM - 1) {
+        increment = -increment;
+#    if defined(RGBLIGHT_SPLIT) && !defined(RGBLIGHT_SPLIT_NO_ANIMATION_SYNC)
+        if (increment == 1) {
+            anim->pos = 0;
+        }
+#    endif
     }
-  }
-  rgblight_set();
-
-  // Move from low_bound to high_bound changing the direction we increment each
-  // time a boundary is hit.
-  low_bound += increment;
-  high_bound += increment;
-
-  if (high_bound <= 0 || low_bound >= RGBLIGHT_EFFECT_KNIGHT_LED_NUM - 1) {
-    increment = -increment;
-  }
 }
+#endif
 
+#ifdef RGBLIGHT_EFFECT_CHRISTMAS
+void rgblight_effect_christmas(animation_status_t *anim) {
+    uint8_t hue;
+    uint8_t i;
 
-void rgblight_effect_christmas(void) {
-  static uint16_t current_offset = 0;
-  static uint16_t last_timer = 0;
-  uint16_t hue;
-  uint8_t i;
-  if (timer_elapsed(last_timer) < RGBLIGHT_EFFECT_CHRISTMAS_INTERVAL) {
-    return;
-  }
-  last_timer = timer_read();
-  current_offset = (current_offset + 1) % 2;
-  for (i = 0; i < RGBLED_NUM; i++) {
-    hue = 0 + ((i/RGBLIGHT_EFFECT_CHRISTMAS_STEP + current_offset) % 2) * 120;
-    sethsv(hue, rgblight_config.sat, rgblight_config.val, (LED_TYPE *)&led[i]);
-  }
-  rgblight_set();
+    anim->current_offset = (anim->current_offset + 1) % 2;
+    for (i = 0; i < effect_num_leds; i++) {
+        hue = 0 + ((i / RGBLIGHT_EFFECT_CHRISTMAS_STEP + anim->current_offset) % 2) * 85;
+        sethsv(hue, rgblight_config.sat, rgblight_config.val, (LED_TYPE *)&led[i + effect_start_pos]);
+    }
+    rgblight_set();
 }
+#endif
 
-void rgblight_effect_rgbtest(void) {
-  static uint8_t pos = 0;
-  static uint16_t last_timer = 0;
-  static uint8_t maxval = 0;
-  uint8_t g; uint8_t r; uint8_t b;
+#ifdef RGBLIGHT_EFFECT_RGB_TEST
+__attribute__((weak)) const uint16_t RGBLED_RGBTEST_INTERVALS[] PROGMEM = {1024};
 
-  if (timer_elapsed(last_timer) < pgm_read_word(&RGBLED_RGBTEST_INTERVALS[0])) {
-    return;
-  }
+void rgblight_effect_rgbtest(animation_status_t *anim) {
+    static uint8_t maxval = 0;
+    uint8_t        g;
+    uint8_t        r;
+    uint8_t        b;
 
-  if( maxval == 0 ) {
-      LED_TYPE tmp_led;
-      sethsv(0, 255, RGBLIGHT_LIMIT_VAL, &tmp_led);
-      maxval = tmp_led.r;
-  }
-  last_timer = timer_read();
-  g = r = b = 0;
-  switch( pos ) {
-    case 0: r = maxval; break;
-    case 1: g = maxval; break;
-    case 2: b = maxval; break;
-  }
-  rgblight_setrgb(r, g, b);
-  pos = (pos + 1) % 3;
+    if (maxval == 0) {
+        LED_TYPE tmp_led;
+        sethsv(0, 255, RGBLIGHT_LIMIT_VAL, &tmp_led);
+        maxval = tmp_led.r;
+    }
+    g = r = b = 0;
+    switch (anim->pos) {
+        // MxSS custom code
+        case 0:
+            r = maxval;
+            fled_hs[0].hue = 0;
+            fled_hs[0].sat = 255;
+            fled_hs[1].hue = 0;
+            fled_hs[1].sat = 255;
+            break;
+        case 1:
+            g = maxval;
+            fled_hs[0].hue = 85;
+            fled_hs[0].sat = 255;
+            fled_hs[1].hue = 85;
+            fled_hs[1].sat = 255;
+            break;
+        case 2:
+            b = maxval;
+            fled_hs[0].hue = 170;
+            fled_hs[0].sat = 255;
+            fled_hs[1].hue = 170;
+            fled_hs[1].sat = 255;
+            break;
+    }
+    rgblight_setrgb(r, g, b);
+    anim->pos = (anim->pos + 1) % 3;
 }
+#endif
 
-#endif /* RGBLIGHT_ANIMATIONS */
+#ifdef RGBLIGHT_EFFECT_ALTERNATING
+void rgblight_effect_alternating(animation_status_t *anim) {
+    for (int i = 0; i < effect_num_leds; i++) {
+        LED_TYPE *ledp = led + i + effect_start_pos;
+        if (i < effect_num_leds / 2 && anim->pos) {
+            sethsv(rgblight_config.hue, rgblight_config.sat, rgblight_config.val, ledp);
+        } else if (i >= effect_num_leds / 2 && !anim->pos) {
+            sethsv(rgblight_config.hue, rgblight_config.sat, rgblight_config.val, ledp);
+        } else {
+            sethsv(rgblight_config.hue, rgblight_config.sat, 0, ledp);
+        }
+    }
+    rgblight_set();
+    anim->pos = (anim->pos + 1) % 2;
+}
+#endif
diff --git a/keyboards/mxss/rgblight.h b/keyboards/mxss/rgblight.h
index 0013a34386..e3aa098e4d 100644
--- a/keyboards/mxss/rgblight.h
+++ b/keyboards/mxss/rgblight.h
@@ -16,137 +16,245 @@
 #ifndef RGBLIGHT_H
 #define RGBLIGHT_H
 
-#ifdef RGBLIGHT_ANIMATIONS
-	#define RGBLIGHT_MODES 35
-#else
-	#define RGBLIGHT_MODES 1
-#endif
-
-#ifndef RGBLIGHT_EFFECT_BREATHE_CENTER
-#define RGBLIGHT_EFFECT_BREATHE_CENTER 1.85  // 1-2.7
-#endif
-
-#ifndef RGBLIGHT_EFFECT_BREATHE_MAX
-#define RGBLIGHT_EFFECT_BREATHE_MAX 255   // 0-255
-#endif
-
-#ifndef RGBLIGHT_EFFECT_SNAKE_LENGTH
-#define RGBLIGHT_EFFECT_SNAKE_LENGTH 4
-#endif
-
-#ifndef RGBLIGHT_EFFECT_KNIGHT_LENGTH
-#define RGBLIGHT_EFFECT_KNIGHT_LENGTH 3
-#endif
-
-#ifndef RGBLIGHT_EFFECT_KNIGHT_OFFSET
-#define RGBLIGHT_EFFECT_KNIGHT_OFFSET 0
-#endif
-
-#ifndef RGBLIGHT_EFFECT_KNIGHT_LED_NUM
-#define RGBLIGHT_EFFECT_KNIGHT_LED_NUM RGBLED_NUM
-#endif
-
-#ifndef RGBLIGHT_EFFECT_CHRISTMAS_INTERVAL
-#define RGBLIGHT_EFFECT_CHRISTMAS_INTERVAL 1000
-#endif
-
-#ifndef RGBLIGHT_EFFECT_CHRISTMAS_STEP
-#define RGBLIGHT_EFFECT_CHRISTMAS_STEP 2
-#endif
-
-#ifndef RGBLIGHT_HUE_STEP
-#define RGBLIGHT_HUE_STEP 10
-#endif
-#ifndef RGBLIGHT_SAT_STEP
-#define RGBLIGHT_SAT_STEP 17
-#endif
-#ifndef RGBLIGHT_VAL_STEP
-#define RGBLIGHT_VAL_STEP 17
-#endif
-
-#define RGBLED_TIMER_TOP F_CPU/(256*64)
+#include "rgblight_reconfig.h"
+
+/***** rgblight_mode(mode)/rgblight_mode_noeeprom(mode) ****
+
+ old mode number (before 0.6.117) to new mode name table
+
+|-----------------|-----------------------------------|
+| old mode number | new mode name                     |
+|-----------------|-----------------------------------|
+|        1        | RGBLIGHT_MODE_STATIC_LIGHT        |
+|        2        | RGBLIGHT_MODE_BREATHING           |
+|        3        | RGBLIGHT_MODE_BREATHING + 1       |
+|        4        | RGBLIGHT_MODE_BREATHING + 2       |
+|        5        | RGBLIGHT_MODE_BREATHING + 3       |
+|        6        | RGBLIGHT_MODE_RAINBOW_MOOD        |
+|        7        | RGBLIGHT_MODE_RAINBOW_MOOD + 1    |
+|        8        | RGBLIGHT_MODE_RAINBOW_MOOD + 2    |
+|        9        | RGBLIGHT_MODE_RAINBOW_SWIRL       |
+|       10        | RGBLIGHT_MODE_RAINBOW_SWIRL + 1   |
+|       11        | RGBLIGHT_MODE_RAINBOW_SWIRL + 2   |
+|       12        | RGBLIGHT_MODE_RAINBOW_SWIRL + 3   |
+|       13        | RGBLIGHT_MODE_RAINBOW_SWIRL + 4   |
+|       14        | RGBLIGHT_MODE_RAINBOW_SWIRL + 5   |
+|       15        | RGBLIGHT_MODE_SNAKE               |
+|       16        | RGBLIGHT_MODE_SNAKE + 1           |
+|       17        | RGBLIGHT_MODE_SNAKE + 2           |
+|       18        | RGBLIGHT_MODE_SNAKE + 3           |
+|       19        | RGBLIGHT_MODE_SNAKE + 4           |
+|       20        | RGBLIGHT_MODE_SNAKE + 5           |
+|       21        | RGBLIGHT_MODE_KNIGHT              |
+|       22        | RGBLIGHT_MODE_KNIGHT + 1          |
+|       23        | RGBLIGHT_MODE_KNIGHT + 2          |
+|       24        | RGBLIGHT_MODE_CHRISTMAS           |
+|       25        | RGBLIGHT_MODE_STATIC_GRADIENT     |
+|       26        | RGBLIGHT_MODE_STATIC_GRADIENT + 1 |
+|       27        | RGBLIGHT_MODE_STATIC_GRADIENT + 2 |
+|       28        | RGBLIGHT_MODE_STATIC_GRADIENT + 3 |
+|       29        | RGBLIGHT_MODE_STATIC_GRADIENT + 4 |
+|       30        | RGBLIGHT_MODE_STATIC_GRADIENT + 5 |
+|       31        | RGBLIGHT_MODE_STATIC_GRADIENT + 6 |
+|       32        | RGBLIGHT_MODE_STATIC_GRADIENT + 7 |
+|       33        | RGBLIGHT_MODE_STATIC_GRADIENT + 8 |
+|       34        | RGBLIGHT_MODE_STATIC_GRADIENT + 9 |
+|       35        | RGBLIGHT_MODE_RGB_TEST            |
+|       36        | RGBLIGHT_MODE_ALTERNATING         |
+|-----------------|-----------------------------------|
+ *****/
+
+#define _RGBM_SINGLE_STATIC(sym) RGBLIGHT_MODE_##sym,
+#define _RGBM_SINGLE_DYNAMIC(sym) RGBLIGHT_MODE_##sym,
+#define _RGBM_MULTI_STATIC(sym) RGBLIGHT_MODE_##sym,
+#define _RGBM_MULTI_DYNAMIC(sym) RGBLIGHT_MODE_##sym,
+#define _RGBM_TMP_STATIC(sym, msym) RGBLIGHT_MODE_##sym,
+#define _RGBM_TMP_DYNAMIC(sym, msym) RGBLIGHT_MODE_##sym,
+enum RGBLIGHT_EFFECT_MODE {
+    RGBLIGHT_MODE_zero = 0,
+#include "rgblight_modes.h"
+    RGBLIGHT_MODE_last
+};
+
+#ifndef RGBLIGHT_H_DUMMY_DEFINE
+
+#    define RGBLIGHT_MODES (RGBLIGHT_MODE_last - 1)
+
+// sample: #define RGBLIGHT_EFFECT_BREATHE_CENTER   1.85
+
+#    ifndef RGBLIGHT_EFFECT_BREATHE_MAX
+#        define RGBLIGHT_EFFECT_BREATHE_MAX 255  // 0-255
+#    endif
+
+#    ifndef RGBLIGHT_EFFECT_SNAKE_LENGTH
+#        define RGBLIGHT_EFFECT_SNAKE_LENGTH 4
+#    endif
+
+#    ifndef RGBLIGHT_EFFECT_KNIGHT_LENGTH
+#        define RGBLIGHT_EFFECT_KNIGHT_LENGTH 3
+#    endif
+
+#    ifndef RGBLIGHT_EFFECT_KNIGHT_OFFSET
+#        define RGBLIGHT_EFFECT_KNIGHT_OFFSET 0
+#    endif
+
+#    ifndef RGBLIGHT_EFFECT_KNIGHT_LED_NUM
+#        define RGBLIGHT_EFFECT_KNIGHT_LED_NUM (effect_num_leds)
+#    endif
+
+#    ifndef RGBLIGHT_EFFECT_CHRISTMAS_INTERVAL
+#        define RGBLIGHT_EFFECT_CHRISTMAS_INTERVAL 1000
+#    endif
+
+#    ifndef RGBLIGHT_EFFECT_CHRISTMAS_STEP
+#        define RGBLIGHT_EFFECT_CHRISTMAS_STEP 2
+#    endif
+
+#    ifndef RGBLIGHT_HUE_STEP
+#        define RGBLIGHT_HUE_STEP 8
+#    endif
+#    ifndef RGBLIGHT_SAT_STEP
+#        define RGBLIGHT_SAT_STEP 17
+#    endif
+#    ifndef RGBLIGHT_VAL_STEP
+#        define RGBLIGHT_VAL_STEP 17
+#    endif
+#    ifndef RGBLIGHT_LIMIT_VAL
+#        define RGBLIGHT_LIMIT_VAL 255
+#    endif
+
+#    define RGBLED_TIMER_TOP F_CPU / (256 * 64)
 // #define RGBLED_TIMER_TOP 0xFF10
 
-#include <stdint.h>
-#include <stdbool.h>
-#include "eeconfig.h"
-#ifndef RGBLIGHT_CUSTOM_DRIVER
-#include "ws2812.h"
-#endif
-#include "color.h"
-#include "rgblight_list.h"
+#    include <stdint.h>
+#    include <stdbool.h>
+#    include "eeconfig.h"
+#    ifndef RGBLIGHT_CUSTOM_DRIVER
+#        include "ws2812.h"
+#    endif
+#    include "color.h"
+#    include "rgblight_list.h"
+
+#    if defined(__AVR__)
+#        include <avr/pgmspace.h>
+#    endif
 
 extern LED_TYPE led[RGBLED_NUM];
 
-extern const uint8_t RGBLED_BREATHING_INTERVALS[4] PROGMEM;
-extern const uint8_t RGBLED_RAINBOW_MOOD_INTERVALS[3] PROGMEM;
-extern const uint8_t RGBLED_RAINBOW_SWIRL_INTERVALS[3] PROGMEM;
-extern const uint8_t RGBLED_SNAKE_INTERVALS[3] PROGMEM;
-extern const uint8_t RGBLED_KNIGHT_INTERVALS[3] PROGMEM;
+extern const uint8_t  RGBLED_BREATHING_INTERVALS[4] PROGMEM;
+extern const uint8_t  RGBLED_RAINBOW_MOOD_INTERVALS[3] PROGMEM;
+extern const uint8_t  RGBLED_RAINBOW_SWIRL_INTERVALS[3] PROGMEM;
+extern const uint8_t  RGBLED_SNAKE_INTERVALS[3] PROGMEM;
+extern const uint8_t  RGBLED_KNIGHT_INTERVALS[3] PROGMEM;
 extern const uint16_t RGBLED_RGBTEST_INTERVALS[1] PROGMEM;
+extern bool           is_rgblight_initialized;
 
+// Should stay in sycn with rgb matrix config as we reuse eeprom storage for both (for now)
 typedef union {
-  uint32_t raw;
-  struct {
-    bool     enable  :1;
-    uint8_t  mode    :6;
-    uint16_t hue     :9;
-    uint8_t  sat     :8;
-    uint8_t  val     :8;
-    uint8_t  speed   :8;//EECONFIG needs to be increased to support this
-  };
+    uint32_t raw;
+    struct {
+        bool    enable : 1;
+        uint8_t mode : 7;
+        uint8_t hue : 8;
+        uint8_t sat : 8;
+        uint8_t val : 8;
+        uint8_t speed : 8;  // EECONFIG needs to be increased to support this
+    };
 } rgblight_config_t;
 
-void rgblight_init(void);
+typedef struct _rgblight_status_t {
+    uint8_t base_mode;
+    bool    timer_enabled;
+#    ifdef RGBLIGHT_SPLIT
+    uint8_t change_flags;
+#    endif
+} rgblight_status_t;
+
+/* === Utility Functions ===*/
+void sethsv(uint8_t hue, uint8_t sat, uint8_t val, LED_TYPE *led1);
+void sethsv_raw(uint8_t hue, uint8_t sat, uint8_t val, LED_TYPE *led1);  // without RGBLIGHT_LIMIT_VAL check
+void setrgb(uint8_t r, uint8_t g, uint8_t b, LED_TYPE *led1);
+
+/* === Low level Functions === */
+void rgblight_set(void);
+void rgblight_set_clipping_range(uint8_t start_pos, uint8_t num_leds);
+
+/* === Effects and Animations Functions === */
+/*   effect range setting */
+void rgblight_set_effect_range(uint8_t start_pos, uint8_t num_leds);
+
+/*   direct operation */
+void rgblight_setrgb_at(uint8_t r, uint8_t g, uint8_t b, uint8_t index);
+void rgblight_sethsv_at(uint8_t hue, uint8_t sat, uint8_t val, uint8_t index);
+void rgblight_setrgb_range(uint8_t r, uint8_t g, uint8_t b, uint8_t start, uint8_t end);
+void rgblight_sethsv_range(uint8_t hue, uint8_t sat, uint8_t val, uint8_t start, uint8_t end);
+void rgblight_setrgb(uint8_t r, uint8_t g, uint8_t b);
+
+#    ifndef RGBLIGHT_SPLIT
+void rgblight_setrgb_master(uint8_t r, uint8_t g, uint8_t b);
+void rgblight_setrgb_slave(uint8_t r, uint8_t g, uint8_t b);
+void rgblight_sethsv_master(uint8_t hue, uint8_t sat, uint8_t val);
+void rgblight_sethsv_slave(uint8_t hue, uint8_t sat, uint8_t val);
+#    endif
+
+/*   effect mode change */
+void rgblight_mode(uint8_t mode);
+void rgblight_mode_noeeprom(uint8_t mode);
 void rgblight_increase(void);
 void rgblight_decrease(void);
+void rgblight_step(void);
+void rgblight_step_noeeprom(void);
+void rgblight_step_reverse(void);
+void rgblight_step_reverse_noeeprom(void);
+
+/*   effects mode disable/enable */
 void rgblight_toggle(void);
+void rgblight_toggle_noeeprom(void);
 void rgblight_enable(void);
+void rgblight_enable_noeeprom(void);
 void rgblight_disable(void);
-void rgblight_step(void);
-void rgblight_step_reverse(void);
-uint8_t rgblight_get_mode(void);
-void rgblight_mode(uint8_t mode);
-void rgblight_set(void);
-void rgblight_update_dword(uint32_t dword);
+void rgblight_disable_noeeprom(void);
+
+/*   hue, sat, val change */
 void rgblight_increase_hue(void);
+void rgblight_increase_hue_noeeprom(void);
 void rgblight_decrease_hue(void);
+void rgblight_decrease_hue_noeeprom(void);
 void rgblight_increase_sat(void);
+void rgblight_increase_sat_noeeprom(void);
 void rgblight_decrease_sat(void);
+void rgblight_decrease_sat_noeeprom(void);
 void rgblight_increase_val(void);
+void rgblight_increase_val_noeeprom(void);
 void rgblight_decrease_val(void);
+void rgblight_decrease_val_noeeprom(void);
 void rgblight_increase_speed(void);
 void rgblight_decrease_speed(void);
-void rgblight_sethsv(uint16_t hue, uint8_t sat, uint8_t val);
-uint16_t rgblight_get_hue(void);
+void rgblight_sethsv(uint8_t hue, uint8_t sat, uint8_t val);
+void rgblight_sethsv_noeeprom(uint8_t hue, uint8_t sat, uint8_t val);
+
+/*       query */
+uint8_t rgblight_get_mode(void);
+uint8_t rgblight_get_hue(void);
 uint8_t rgblight_get_sat(void);
 uint8_t rgblight_get_val(void);
-void rgblight_setrgb(uint8_t r, uint8_t g, uint8_t b);
-void rgblight_setrgb_at(uint8_t r, uint8_t g, uint8_t b, uint8_t index);
-void rgblight_sethsv_at(uint16_t hue, uint8_t sat, uint8_t val, uint8_t index);
 
+/* === qmk_firmware (core)internal Functions === */
+void     rgblight_init(void);
+uint32_t rgblight_read_dword(void);
+void     rgblight_update_dword(uint32_t dword);
 uint32_t eeconfig_read_rgblight(void);
-void eeconfig_update_rgblight(uint32_t val);
-void eeconfig_update_rgblight_default(void);
-void eeconfig_debug_rgblight(void);
+void     eeconfig_update_rgblight(uint32_t val);
+void     eeconfig_update_rgblight_default(void);
+void     eeconfig_debug_rgblight(void);
 
 void rgb_matrix_increase(void);
 void rgb_matrix_decrease(void);
 
-void sethsv(uint16_t hue, uint8_t sat, uint8_t val, LED_TYPE *led1);
-void setrgb(uint8_t r, uint8_t g, uint8_t b, LED_TYPE *led1);
-
-void rgblight_sethsv_noeeprom(uint16_t hue, uint8_t sat, uint8_t val);
-void rgblight_mode_noeeprom(uint8_t mode);
-void rgblight_toggle_noeeprom(void);
-void rgblight_enable_noeeprom(void);
-void rgblight_disable_noeeprom(void);
-
-void rgblight_sethsv_eeprom_helper(uint16_t hue, uint8_t sat, uint8_t val, bool write_to_eeprom);
+void rgblight_sethsv_eeprom_helper(uint8_t hue, uint8_t sat, uint8_t val, bool write_to_eeprom);
 void rgblight_mode_eeprom_helper(uint8_t mode, bool write_to_eeprom);
 
-
-#define EZ_RGB(val) rgblight_show_solid_color((val >> 16) & 0xFF, (val >> 8) & 0xFF, val & 0xFF)
+#    define EZ_RGB(val) rgblight_show_solid_color((val >> 16) & 0xFF, (val >> 8) & 0xFF, val & 0xFF)
 void rgblight_show_solid_color(uint8_t r, uint8_t g, uint8_t b);
 
 void rgblight_task(void);
@@ -155,12 +263,52 @@ void rgblight_timer_init(void);
 void rgblight_timer_enable(void);
 void rgblight_timer_disable(void);
 void rgblight_timer_toggle(void);
-void rgblight_effect_breathing(uint8_t interval);
-void rgblight_effect_rainbow_mood(uint8_t interval);
-void rgblight_effect_rainbow_swirl(uint8_t interval);
-void rgblight_effect_snake(uint8_t interval);
-void rgblight_effect_knight(uint8_t interval);
-void rgblight_effect_christmas(void);
-void rgblight_effect_rgbtest(void);
-
-#endif
+
+#    ifdef RGBLIGHT_SPLIT
+#        define RGBLIGHT_STATUS_CHANGE_MODE (1 << 0)
+#        define RGBLIGHT_STATUS_CHANGE_HSVS (1 << 1)
+#        define RGBLIGHT_STATUS_CHANGE_TIMER (1 << 2)
+#        define RGBLIGHT_STATUS_ANIMATION_TICK (1 << 3)
+
+typedef struct _rgblight_syncinfo_t {
+    rgblight_config_t config;
+    rgblight_status_t status;
+} rgblight_syncinfo_t;
+
+/* for split keyboard master side */
+uint8_t rgblight_get_change_flags(void);
+void    rgblight_clear_change_flags(void);
+void    rgblight_get_syncinfo(rgblight_syncinfo_t *syncinfo);
+/* for split keyboard slave side */
+void rgblight_update_sync(rgblight_syncinfo_t *syncinfo, bool write_to_eeprom);
+#    endif
+
+#    ifdef RGBLIGHT_USE_TIMER
+
+typedef struct _animation_status_t {
+    uint16_t last_timer;
+    uint8_t  delta; /* mode - base_mode */
+    bool     restart;
+    union {
+        uint16_t pos16;
+        uint8_t  pos;
+        int8_t   current_hue;
+        uint16_t current_offset;
+    };
+} animation_status_t;
+
+extern animation_status_t animation_status;
+
+void rgblight_effect_breathing(animation_status_t *anim);
+void rgblight_effect_rainbow_mood(animation_status_t *anim);
+void rgblight_effect_rainbow_swirl(animation_status_t *anim);
+void rgblight_effect_snake(animation_status_t *anim);
+void rgblight_effect_knight(animation_status_t *anim);
+void rgblight_effect_christmas(animation_status_t *anim);
+void rgblight_effect_rgbtest(animation_status_t *anim);
+void rgblight_effect_alternating(animation_status_t *anim);
+
+#    endif
+
+#endif  // #ifndef RGBLIGHT_H_DUMMY_DEFINE
+#endif  // RGBLIGHT_H
diff --git a/keyboards/mxss/rules.mk b/keyboards/mxss/rules.mk
index f9210319e3..a1ca27ca46 100644
--- a/keyboards/mxss/rules.mk
+++ b/keyboards/mxss/rules.mk
@@ -14,7 +14,7 @@ BOOTLOADER = atmel-dfu
 # Build Options
 #   change yes to no to disable
 #
-BOOTMAGIC_ENABLE = no      # Virtual DIP switch configuration(+1000)
+BOOTMAGIC_ENABLE = lite      # Virtual DIP switch configuration(+1000)
 MOUSEKEY_ENABLE = yes       # Mouse keys(+4700)
 EXTRAKEY_ENABLE = yes       # Audio control and System control(+450)
 CONSOLE_ENABLE = no        # Console for debug(+400)
@@ -30,10 +30,12 @@ BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
 AUDIO_ENABLE = no           # Audio output on port C6
 FAUXCLICKY_ENABLE = no      # Use buzzer to emulate clicky switches
 
+SRC += mxss_frontled.c
+
 # Remove the common RGB light code and use my iteration instead
 OPT_DEFS += -DRGBLIGHT_ENABLE
 SRC += $(QUANTUM_DIR)/process_keycode/process_rgb.c
 SRC += rgblight.c
+SRC += color.c
 SRC += ws2812.c
 CIE1931_CURVE = yes
-LED_BREATHING_TABLE = yes
diff --git a/keyboards/mxss/templates/keymap.c b/keyboards/mxss/templates/keymap.c
index 13dbb7206c..a18cff77f0 100644
--- a/keyboards/mxss/templates/keymap.c
+++ b/keyboards/mxss/templates/keymap.c
@@ -14,23 +14,24 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include QMK_KEYBOARD_H
-#include "mxss_frontled.h"
 
-// Predefined colors for layers
+hs_set caps_color = { .hue = 0, .sat = 255 };
+
+// Colors for layers
 // Format: {hue, saturation}
 // {0, 0} to turn off the LED
 // Add additional rows to handle more layers
-hs_set layer_colors[] = {
-    [0] = {0,     0},  // Color for Layer 0
-    [1] = {86,    255},  // Color for Layer 1
-    [2] = {36,    255},  // Color for Layer 2
-    [3] = {185,   255},  // Color for Layer 3
+hs_set layer_colors[4] = {
+    [0] = {.hue = 0,     .sat = 0},  // Color for Layer 0
+    [1] = {.hue = 86,    .sat = 255},  // Color for Layer 1
+    [2] = {.hue = 36,    .sat = 255},  // Color for Layer 2
+    [3] = {.hue = 185,   .sat = 255},  // Color for Layer 3
 };
-const size_t lc_size = sizeof(layer_colors) / sizeof(uint16_t);
+size_t lc_size = sizeof(layer_colors) / sizeof(uint16_t);
 
 // Use NEW_SAFE_RANGE to define new custom keycodes in order to not overwrite the ones used for front LED control
 enum custom_keycodes {
-  MY_KEYCODE = NEW_SAFE_RANGE, 
+  MY_KEYCODE = NEW_SAFE_RANGE,
 };