Merge branch 'master' into feature/unicode_map_improvements

24 files changed, 350 insertions, 241 deletions

diff --git a/.travis.yml b/.travis.yml
index 194c469b22..66b79139e6 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,10 +13,14 @@ env:
   - MAKEFLAGS="-j3 --output-sync"
 before_install:
   - wget http://ww1.microchip.com/downloads/en/DeviceDoc/avr8-gnu-toolchain-3.5.4.1709-linux.any.x86_64.tar.gz || wget http://qmk.fm/avr8-gnu-toolchain-3.5.4.1709-linux.any.x86_64.tar.gz
+  # Need DFU > .5 for dfu-suffix
+  - sudo add-apt-repository --yes ppa:tormodvolden/ppa
+  - sudo apt-get update -qq
 install:
   - tar -zxf avr8-gnu-toolchain-3.5.4.1709-linux.any.x86_64.tar.gz
   - export PATH="$PATH:$TRAVIS_BUILD_DIR/avr8-gnu-toolchain-linux_x86_64/bin"
   - npm install -g moxygen
+  - sudo apt-get -y --force-yes install dfu-util
 before_script:
   - avr-gcc --version
 script:
diff --git a/build_keyboard.mk b/build_keyboard.mk
index 5d633f2716..469a947f5e 100644
--- a/build_keyboard.mk
+++ b/build_keyboard.mk
@@ -324,7 +324,6 @@ ifneq ("$(wildcard $(KEYMAP_PATH)/config.h)","")
 endif
 
 # # project specific files
-SRC += $(patsubst %.c,%.clib,$(LIB_SRC))
 SRC += $(KEYBOARD_SRC) \
     $(KEYMAP_C) \
     $(QUANTUM_SRC)
@@ -343,6 +342,7 @@ include $(TMK_PATH)/protocol.mk
 include $(TMK_PATH)/common.mk
 include bootloader.mk
 
+SRC += $(patsubst %.c,%.clib,$(LIB_SRC))
 SRC += $(patsubst %.c,%.clib,$(QUANTUM_LIB_SRC))
 SRC += $(TMK_COMMON_SRC)
 OPT_DEFS += $(TMK_COMMON_DEFS)
diff --git a/changelog.md b/changelog.md
index b8e73b1422..cdebe64f43 100644
--- a/changelog.md
+++ b/changelog.md
@@ -13,4 +13,6 @@
 04-22-2019 - Add Split RGB support  
 04-24-2019 - fix LIB_SRC and QUANTUM_LIB_SRC for ARM  
 04-24-2019 - Add RGB Split fixes and RGB Names  
-05-05-2019 - New keycode macro (XP) for shifted character pairs using UNICODEMAP, and bugfixes/improvements
+05-05-2019 - New keycode macro (XP) for shifted character pairs using UNICODEMAP, and bugfixes/improvements  
+05-05-2019 - Add `LINK_TIME_OPTIMIZATION_ENABLE` to enable LTO and disable problematic features that cause LTO to fail  
+05-05-2019 - Fix issue with Space Cadet  
diff --git a/common_features.mk b/common_features.mk
index 6dffe31ff8..7c35f07d52 100644
--- a/common_features.mk
+++ b/common_features.mk
@@ -105,6 +105,7 @@ endif
 ifeq ($(strip $(RGBLIGHT_ENABLE)), yes)
     POST_CONFIG_H += $(QUANTUM_DIR)/rgblight_post_config.h
     OPT_DEFS += -DRGBLIGHT_ENABLE
+    SRC += $(QUANTUM_DIR)/color.c
     SRC += $(QUANTUM_DIR)/rgblight.c
     CIE1931_CURVE = yes
     LED_BREATHING_TABLE = yes
diff --git a/drivers/avr/ws2812.c b/drivers/avr/ws2812.c
index b3ed4fd0b0..7c3cb5174d 100644
--- a/drivers/avr/ws2812.c
+++ b/drivers/avr/ws2812.c
@@ -158,7 +158,7 @@ void inline ws2812_setled(int i, uint8_t r, uint8_t g, uint8_t b)
 
 void ws2812_setled_all  (uint8_t r, uint8_t g, uint8_t b)
 {
-  for (int i = 0; i < RGBLED_NUM; i++) {
+  for (int i = 0; i < sizeof(led)/sizeof(led[0]); i++) {
     led[i].r = r;
     led[i].g = g;
     led[i].b = b;
diff --git a/quantum/color.c b/quantum/color.c
index c49877592e..466e6edacb 100644
--- a/quantum/color.c
+++ b/quantum/color.c
@@ -22,8 +22,8 @@
 RGB hsv_to_rgb( HSV hsv )
 {
 	RGB rgb;
-	uint8_t region, p, q, t;
-	uint16_t h, s, v, remainder;
+	uint8_t region, remainder, p, q, t;
+	uint16_t h, s, v;
 
 	if ( hsv.s == 0 )
 	{
@@ -37,8 +37,8 @@ RGB hsv_to_rgb( HSV hsv )
 	s = hsv.s;
 	v = hsv.v;
 
-	region = h / 43;
-	remainder = (h - (region * 43)) * 6;
+	region = h * 6 / 255;
+	remainder = (h * 2 - region * 85) * 3;
 
 	p = (v * (255 - s)) >> 8;
 	q = (v * (255 - ((s * remainder) >> 8))) >> 8;
@@ -46,6 +46,7 @@ RGB hsv_to_rgb( HSV hsv )
 
 	switch ( region )
 	{
+		case 6:
 		case 0:
 			rgb.r = v;
 			rgb.g = t;
diff --git a/quantum/led_tables.c b/quantum/led_tables.c
index b99f262097..0eeb5c44b6 100644
--- a/quantum/led_tables.c
+++ b/quantum/led_tables.c
@@ -19,38 +19,28 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifdef USE_CIE1931_CURVE
 // Lightness curve using the CIE 1931 lightness formula
 //Generated by the python script provided in http://jared.geek.nz/2013/feb/linear-led-pwm
-const uint8_t CIE1931_CURVE[] PROGMEM = {
-    0, 0, 0, 0, 0, 1, 1, 1, 1, 1,
-    1, 1, 1, 1, 2, 2, 2, 2, 2, 2,
-    2, 2, 2, 3, 3, 3, 3, 3, 3, 3,
-    3, 4, 4, 4, 4, 4, 4, 5, 5, 5,
-    5, 5, 6, 6, 6, 6, 6, 7, 7, 7,
-    7, 8, 8, 8, 8, 9, 9, 9, 10, 10,
-    10, 10, 11, 11, 11, 12, 12, 12, 13, 13,
-    13, 14, 14, 15, 15, 15, 16, 16, 17, 17,
-    17, 18, 18, 19, 19, 20, 20, 21, 21, 22,
-    22, 23, 23, 24, 24, 25, 25, 26, 26, 27,
-    28, 28, 29, 29, 30, 31, 31, 32, 32, 33,
-    34, 34, 35, 36, 37, 37, 38, 39, 39, 40,
-    41, 42, 43, 43, 44, 45, 46, 47, 47, 48,
-    49, 50, 51, 52, 53, 54, 54, 55, 56, 57,
-    58, 59, 60, 61, 62, 63, 64, 65, 66, 67,
-    68, 70, 71, 72, 73, 74, 75, 76, 77, 79,
-    80, 81, 82, 83, 85, 86, 87, 88, 90, 91,
-    92, 94, 95, 96, 98, 99, 100, 102, 103, 105,
-    106, 108, 109, 110, 112, 113, 115, 116, 118, 120,
-    121, 123, 124, 126, 128, 129, 131, 132, 134, 136,
-    138, 139, 141, 143, 145, 146, 148, 150, 152, 154,
-    155, 157, 159, 161, 163, 165, 167, 169, 171, 173,
-    175, 177, 179, 181, 183, 185, 187, 189, 191, 193,
-    196, 198, 200, 202, 204, 207, 209, 211, 214, 216,
-    218, 220, 223, 225, 228, 230, 232, 235, 237, 240,
-    242, 245, 247, 250, 252, 255,
-    };
+const uint8_t CIE1931_CURVE[256] PROGMEM = {
+  0,   0,   0,   0,   0,   0,   0,   0,   0,   0,   1,   1,   1,   1,   1,   1,
+  1,   1,   1,   2,   2,   2,   2,   2,   2,   2,   2,   3,   3,   3,   3,   3,
+  3,   3,   4,   4,   4,   4,   4,   5,   5,   5,   5,   5,   6,   6,   6,   6,
+  6,   7,   7,   7,   7,   8,   8,   8,   8,   9,   9,   9,  10,  10,  10,  11,
+ 11,  11,  12,  12,  12,  13,  13,  13,  14,  14,  14,  15,  15,  16,  16,  16,
+ 17,  17,  18,  18,  19,  19,  20,  20,  21,  21,  22,  22,  23,  23,  24,  24,
+ 25,  25,  26,  26,  27,  28,  28,  29,  29,  30,  31,  31,  32,  33,  33,  34,
+ 35,  35,  36,  37,  37,  38,  39,  40,  40,  41,  42,  43,  44,  44,  45,  46,
+ 47,  48,  49,  49,  50,  51,  52,  53,  54,  55,  56,  57,  58,  59,  60,  61,
+ 62,  63,  64,  65,  66,  67,  68,  69,  70,  71,  72,  73,  75,  76,  77,  78,
+ 79,  80,  82,  83,  84,  85,  87,  88,  89,  90,  92,  93,  94,  96,  97,  99,
+100, 101, 103, 104, 106, 107, 108, 110, 111, 113, 114, 116, 118, 119, 121, 122,
+124, 125, 127, 129, 130, 132, 134, 135, 137, 139, 141, 142, 144, 146, 148, 149,
+151, 153, 155, 157, 159, 161, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180,
+182, 185, 187, 189, 191, 193, 195, 197, 200, 202, 204, 206, 208, 211, 213, 215,
+218, 220, 222, 225, 227, 230, 232, 234, 237, 239, 242, 244, 247, 249, 252, 255
+};
 #endif
 
 #ifdef USE_LED_BREATHING_TABLE
-const uint8_t LED_BREATHING_TABLE[] PROGMEM = {
+const uint8_t LED_BREATHING_TABLE[256] PROGMEM = {
   0, 0, 0, 0, 1, 1, 1, 2, 2, 3, 4, 5, 5, 6, 7, 9,
   10, 11, 12, 14, 15, 17, 18, 20, 21, 23, 25, 27, 29, 31, 33, 35,
   37, 40, 42, 44, 47, 49, 52, 54, 57, 59, 62, 65, 67, 70, 73, 76,
diff --git a/quantum/mcu_selection.mk b/quantum/mcu_selection.mk
index 209b578ea5..fa6dc8b53c 100644
--- a/quantum/mcu_selection.mk
+++ b/quantum/mcu_selection.mk
@@ -34,6 +34,7 @@ ifneq ($(findstring STM32F303, $(MCU)),)
 
   # Options to pass to dfu-util when flashing
   DFU_ARGS ?= -d 0483:df11 -a 0 -s 0x08000000:leave
+  DFU_SUFFIX_ARGS = -p DF11 -v 0483
 endif
 
 ifneq (,$(filter $(MCU),atmega32u4 at90usb1286))
diff --git a/quantum/process_keycode/process_space_cadet.c b/quantum/process_keycode/process_space_cadet.c
index a9c506168d..ac39df8089 100644
--- a/quantum/process_keycode/process_space_cadet.c
+++ b/quantum/process_keycode/process_space_cadet.c
@@ -62,16 +62,16 @@
 #ifndef LCPO_KEYS
   #define LCPO_KEYS KC_LCTL, KC_LCTL, KC_9
 #endif
-#ifndef RCPO_KEYS
-  #define RCPO_KEYS KC_RCTL, KC_RCTL, KC_0
+#ifndef RCPC_KEYS
+  #define RCPC_KEYS KC_RCTL, KC_RCTL, KC_0
 #endif
 
 // Alt / paren setup
 #ifndef LAPO_KEYS
   #define LAPO_KEYS KC_LALT, KC_LALT, KC_9
 #endif
-#ifndef RAPO_KEYS
-  #define RAPO_KEYS KC_RALT, KC_RALT, KC_0
+#ifndef RAPC_KEYS
+  #define RAPC_KEYS KC_RALT, KC_RALT, KC_0
 #endif
 
 // Shift / Enter setup
@@ -82,27 +82,32 @@
 static uint8_t sc_last = 0;
 static uint16_t sc_timer = 0;
 
-void perform_space_cadet(keyrecord_t *record, uint8_t normalMod, uint8_t tapMod, uint8_t keycode) {
+void perform_space_cadet(keyrecord_t *record, uint8_t holdMod, uint8_t tapMod, uint8_t keycode) {
   if (record->event.pressed) {
-    sc_last = normalMod;
+    sc_last = holdMod;
     sc_timer = timer_read ();
-    if (IS_MOD(normalMod)) {
-      register_mods(MOD_BIT(normalMod));
+    if (IS_MOD(holdMod)) {
+      register_mods(MOD_BIT(holdMod));
     }
   }
   else {
-    if (IS_MOD(normalMod)) {
-      unregister_mods(MOD_BIT(normalMod));
-    }
-
-    if (sc_last == normalMod && timer_elapsed(sc_timer) < TAPPING_TERM) {
-      if (IS_MOD(tapMod)) {
-        register_mods(MOD_BIT(tapMod));
+    if (sc_last == holdMod && timer_elapsed(sc_timer) < TAPPING_TERM) {
+      if (holdMod != tapMod) {
+        if (IS_MOD(holdMod)) {
+          unregister_mods(MOD_BIT(holdMod));
+        }
+        if (IS_MOD(tapMod)) {
+          register_mods(MOD_BIT(tapMod));
+        }
       }
       tap_code(keycode);
       if (IS_MOD(tapMod)) {
         unregister_mods(MOD_BIT(tapMod));
       }
+    } else {
+      if (IS_MOD(holdMod)) {
+        unregister_mods(MOD_BIT(holdMod));
+      }
     }
   }
 }
@@ -122,7 +127,7 @@ bool process_space_cadet(uint16_t keycode, keyrecord_t *record) {
       return false;
     }
     case KC_RCPC: {
-      perform_space_cadet(record, RCPO_KEYS);
+      perform_space_cadet(record, RCPC_KEYS);
       return false;
     }
     case KC_LAPO: {
@@ -130,7 +135,7 @@ bool process_space_cadet(uint16_t keycode, keyrecord_t *record) {
       return false;
     }
     case KC_RAPC: {
-      perform_space_cadet(record, RAPO_KEYS);
+      perform_space_cadet(record, RAPC_KEYS);
       return false;
     }
     case KC_SFTENT: {
diff --git a/quantum/process_keycode/process_space_cadet.h b/quantum/process_keycode/process_space_cadet.h
index 3f08b8002a..c823143504 100644
--- a/quantum/process_keycode/process_space_cadet.h
+++ b/quantum/process_keycode/process_space_cadet.h
@@ -17,5 +17,5 @@
 
 #include "quantum.h"
 
-void perform_space_cadet(keyrecord_t *record, uint8_t normalMod, uint8_t tapMod, uint8_t keycode);
+void perform_space_cadet(keyrecord_t *record, uint8_t holdMod, uint8_t tapMod, uint8_t keycode);
 bool process_space_cadet(uint16_t keycode, keyrecord_t *record);
diff --git a/quantum/rgb_matrix.c b/quantum/rgb_matrix.c
index 1d27a620a2..3c83463146 100644
--- a/quantum/rgb_matrix.c
+++ b/quantum/rgb_matrix.c
@@ -144,9 +144,14 @@ void eeconfig_debug_rgb_matrix(void) {
   dprintf("rgb_matrix_config.speed = %d\n", rgb_matrix_config.speed);
 }
 
+__attribute__ ((weak))
+uint8_t rgb_matrix_map_row_column_to_led_kb(uint8_t row, uint8_t column, uint8_t *led_i) {
+  return 0;
+}
+
 uint8_t rgb_matrix_map_row_column_to_led(uint8_t row, uint8_t column, uint8_t *led_i) {
   // TODO: This is kinda expensive, fix this soonish
-  uint8_t led_count = 0;
+  uint8_t led_count = rgb_matrix_map_row_column_to_led_kb(row, column, led_i);
   for (uint8_t i = 0; i < DRIVER_LED_TOTAL && led_count < LED_HITS_TO_REMEMBER; i++) {
     matrix_co_t matrix_co = g_rgb_leds[i].matrix_co;
     if (row == matrix_co.row && column == matrix_co.col) {
diff --git a/quantum/rgb_matrix_animations/solid_reactive_anim.h b/quantum/rgb_matrix_animations/solid_reactive_anim.h
index 220e542331..1116bb055c 100644
--- a/quantum/rgb_matrix_animations/solid_reactive_anim.h
+++ b/quantum/rgb_matrix_animations/solid_reactive_anim.h
@@ -14,7 +14,8 @@ bool rgb_matrix_solid_reactive(effect_params_t* params) {
   // Relies on hue being 8-bit and wrapping
   for (uint8_t i = led_min; i < led_max; i++) {
     uint16_t tick = max_tick;
-    for(uint8_t j = 0; j < g_last_hit_tracker.count; j++) {
+    // Reverse search to find most recent key hit
+    for (int8_t j = g_last_hit_tracker.count - 1; j >= 0; j--) {
       if (g_last_hit_tracker.index[j] == i && g_last_hit_tracker.tick[j] < tick) {
         tick = g_last_hit_tracker.tick[j];
         break;
diff --git a/quantum/rgb_matrix_animations/solid_reactive_simple_anim.h b/quantum/rgb_matrix_animations/solid_reactive_simple_anim.h
index e84cd69392..a2d3f242c1 100644
--- a/quantum/rgb_matrix_animations/solid_reactive_simple_anim.h
+++ b/quantum/rgb_matrix_animations/solid_reactive_simple_anim.h
@@ -13,7 +13,8 @@ bool rgb_matrix_solid_reactive_simple(effect_params_t* params) {
   uint16_t max_tick = 65535 / rgb_matrix_config.speed;
   for (uint8_t i = led_min; i < led_max; i++) {
     uint16_t tick = max_tick;
-    for(uint8_t j = 0; j < g_last_hit_tracker.count; j++) {
+    // Reverse search to find most recent key hit
+    for (int8_t j = g_last_hit_tracker.count - 1; j >= 0; j--) {
       if (g_last_hit_tracker.index[j] == i && g_last_hit_tracker.tick[j] < tick) {
         tick = g_last_hit_tracker.tick[j];
         break;
diff --git a/quantum/rgb_matrix_drivers.c b/quantum/rgb_matrix_drivers.c
index 3814dd61fc..1d64dc9093 100644
--- a/quantum/rgb_matrix_drivers.c
+++ b/quantum/rgb_matrix_drivers.c
@@ -99,12 +99,12 @@ const rgb_matrix_driver_t rgb_matrix_driver = {
 
 #elif defined(WS2812)
 
-extern LED_TYPE led[RGBLED_NUM];
+extern LED_TYPE led[DRIVER_LED_TOTAL];
 
   static void flush( void )
   {
     // Assumes use of RGB_DI_PIN
-    ws2812_setleds(led, RGBLED_NUM);
+    ws2812_setleds(led, DRIVER_LED_TOTAL);
   }
 
   static void init( void )
diff --git a/quantum/rgblight.c b/quantum/rgblight.c
index 2f23768ed7..77772e2925 100644
--- a/quantum/rgblight.c
+++ b/quantum/rgblight.c
@@ -28,8 +28,10 @@
 #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
@@ -74,16 +76,13 @@ static inline int is_static_effect(uint8_t mode) {
     return memchr(static_effect_table, mode, sizeof(static_effect_table)) != NULL;
 }
 
-#define MIN(a,b) (((a)<(b))?(a):(b))
-#define MAX(a,b) (((a)>(b))?(a):(b))
-
 #ifdef RGBLIGHT_LED_MAP
 const uint8_t led_map[] PROGMEM = RGBLIGHT_LED_MAP;
 #endif
 
 #ifdef RGBLIGHT_EFFECT_STATIC_GRADIENT
 __attribute__ ((weak))
-const uint16_t RGBLED_GRADIENT_RANGES[] PROGMEM = {360, 240, 180, 120, 90};
+const uint8_t RGBLED_GRADIENT_RANGES[] PROGMEM = {255, 170, 127, 85, 64};
 #endif
 
 rgblight_config_t rgblight_config;
@@ -109,59 +108,10 @@ void rgblight_set_clipping_range(uint8_t start_pos, uint8_t num_leds) {
 }
 
 
-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 (val > RGBLIGHT_LIMIT_VAL) {
-      val=RGBLIGHT_LIMIT_VAL; // limit the val
-  }
-
-  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]);
-
-  setrgb(r, g, b, led1);
+void sethsv(uint8_t hue, uint8_t sat, uint8_t val, LED_TYPE *led1) {
+  HSV hsv = { hue, sat, val > RGBLIGHT_LIMIT_VAL ? RGBLIGHT_LIMIT_VAL : val };
+  RGB rgb = hsv_to_rgb(hsv);
+  setrgb(rgb.r, rgb.g, rgb.b, led1);
 }
 
 void setrgb(uint8_t r, uint8_t g, uint8_t b, LED_TYPE *led1) {
@@ -180,24 +130,9 @@ void rgblight_check_config(void) {
     rgblight_config.mode = RGBLIGHT_MODES;
   }
 
-  if (rgblight_config.hue < 0) {
-    rgblight_config.hue = 0;
-  } else if (rgblight_config.hue > 360) {
-    rgblight_config.hue %= 360;
-  }
-
-  if (rgblight_config.sat < 0) {
-    rgblight_config.sat = 0;
-  } else if (rgblight_config.sat > 255) {
-    rgblight_config.sat = 255;
-  }
-
-  if (rgblight_config.val < 0) {
-    rgblight_config.val = 0;
-  } else if (rgblight_config.val > RGBLIGHT_LIMIT_VAL) {
+  if (rgblight_config.val > RGBLIGHT_LIMIT_VAL) {
     rgblight_config.val = RGBLIGHT_LIMIT_VAL;
   }
-
 }
 
 uint32_t eeconfig_read_rgblight(void) {
@@ -220,7 +155,7 @@ void eeconfig_update_rgblight_default(void) {
   rgblight_config.enable = 1;
   rgblight_config.mode = RGBLIGHT_MODE_STATIC_LIGHT;
   rgblight_config.hue = 0;
-  rgblight_config.sat = 255;
+  rgblight_config.sat = UINT8_MAX;
   rgblight_config.val = RGBLIGHT_LIMIT_VAL;
   rgblight_config.speed = 0;
   RGBLIGHT_SPLIT_SET_CHANGE_MODEHSVS;
@@ -442,23 +377,8 @@ void rgblight_disable_noeeprom(void) {
   rgblight_set();
 }
 
-
-// Deals with the messy details of incrementing an integer
-static 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 );
-}
-
-static 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_helper(bool write_to_eeprom) {
-  uint16_t hue;
-  hue = (rgblight_config.hue+RGBLIGHT_HUE_STEP) % 360;
+  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_noeeprom(void) {
@@ -468,12 +388,7 @@ void rgblight_increase_hue(void) {
   rgblight_increase_hue_helper(true);
 }
 void rgblight_decrease_hue_helper(bool write_to_eeprom) {
-  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;
-  }
+  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_decrease_hue_noeeprom(void) {
@@ -483,12 +398,7 @@ void rgblight_decrease_hue(void) {
   rgblight_decrease_hue_helper(true);
 }
 void rgblight_increase_sat_helper(bool write_to_eeprom) {
-  uint8_t sat;
-  if (rgblight_config.sat + RGBLIGHT_SAT_STEP > 255) {
-    sat = 255;
-  } else {
-    sat = rgblight_config.sat + RGBLIGHT_SAT_STEP;
-  }
+  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_increase_sat_noeeprom(void) {
@@ -498,12 +408,7 @@ void rgblight_increase_sat(void) {
   rgblight_increase_sat_helper(true);
 }
 void rgblight_decrease_sat_helper(bool write_to_eeprom) {
-  uint8_t sat;
-  if (rgblight_config.sat - RGBLIGHT_SAT_STEP < 0) {
-    sat = 0;
-  } else {
-    sat = rgblight_config.sat - RGBLIGHT_SAT_STEP;
-  }
+  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) {
@@ -513,12 +418,7 @@ void rgblight_decrease_sat(void) {
   rgblight_decrease_sat_helper(true);
 }
 void rgblight_increase_val_helper(bool write_to_eeprom) {
-  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;
-  }
+  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) {
@@ -528,12 +428,7 @@ void rgblight_increase_val(void) {
   rgblight_increase_val_helper(true);
 }
 void rgblight_decrease_val_helper(bool write_to_eeprom) {
-  uint8_t val;
-  if (rgblight_config.val - RGBLIGHT_VAL_STEP < 0) {
-    val = 0;
-  } else {
-    val = rgblight_config.val - RGBLIGHT_VAL_STEP;
-  }
+  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) {
@@ -543,18 +438,20 @@ 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 );
+    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 );
+    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) {
+void rgblight_sethsv_noeeprom_old(uint8_t hue, uint8_t sat, uint8_t val) {
   if (rgblight_config.enable) {
     LED_TYPE tmp_led;
     sethsv(hue, sat, val, &tmp_led);
@@ -563,7 +460,7 @@ void rgblight_sethsv_noeeprom_old(uint16_t hue, uint8_t sat, uint8_t val) {
   }
 }
 
-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) {
   if (rgblight_config.enable) {
     rgblight_status.base_mode = mode_base_table[rgblight_config.mode];
     if (rgblight_config.mode == RGBLIGHT_MODE_STATIC_LIGHT) {
@@ -596,13 +493,22 @@ void rgblight_sethsv_eeprom_helper(uint16_t hue, uint8_t sat, uint8_t val, bool
 #ifdef RGBLIGHT_EFFECT_STATIC_GRADIENT
       else if (rgblight_status.base_mode == RGBLIGHT_MODE_STATIC_GRADIENT) {
         // static gradient
-        uint16_t _hue;
         uint8_t delta = rgblight_config.mode - rgblight_status.base_mode;
-        int8_t direction = (delta % 2) ? -1 : 1;
-        uint16_t range = pgm_read_word(&RGBLED_GRADIENT_RANGES[delta / 2]);
+        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 < 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);
+          uint8_t _hue = ((uint16_t)i * (uint16_t)range) / RGBLED_NUM;
+          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]);
         }
         rgblight_set();
@@ -628,15 +534,15 @@ void rgblight_sethsv_eeprom_helper(uint16_t hue, uint8_t sat, uint8_t val, bool
   }
 }
 
-void rgblight_sethsv(uint16_t hue, uint8_t sat, uint8_t val) {
+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) {
+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) {
+uint8_t rgblight_get_hue(void) {
   return rgblight_config.hue;
 }
 
@@ -668,7 +574,7 @@ void rgblight_setrgb_at(uint8_t r, uint8_t g, uint8_t b, uint8_t index) {
   rgblight_set();
 }
 
-void rgblight_sethsv_at(uint16_t hue, uint8_t sat, uint8_t val, uint8_t index) {
+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;
@@ -701,7 +607,7 @@ void rgblight_setrgb_range(uint8_t r, uint8_t g, uint8_t b, uint8_t start, uint8
   wait_ms(1);
 }
 
-void rgblight_sethsv_range(uint16_t hue, uint8_t sat, uint8_t val, 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) {
   if (!rgblight_config.enable) { return; }
 
   LED_TYPE tmp_led;
@@ -717,11 +623,11 @@ 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(uint16_t hue, uint8_t sat, uint8_t val) {
+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(uint16_t hue, uint8_t sat, uint8_t val) {
+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);
 }
 
@@ -973,6 +879,14 @@ void rgblight_task(void) {
 
 // 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};
 
@@ -980,9 +894,13 @@ 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) % 256;
+  anim->pos = (anim->pos + 1);
 }
 #endif
 
@@ -992,36 +910,32 @@ const uint8_t RGBLED_RAINBOW_MOOD_INTERVALS[] PROGMEM = {120, 60, 30};
 
 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 = (anim->current_hue + 1) % 360;
+  anim->current_hue++;
 }
 #endif
 
 #ifdef RGBLIGHT_EFFECT_RAINBOW_SWIRL
 #ifndef RGBLIGHT_RAINBOW_SWIRL_RANGE
-  #define RGBLIGHT_RAINBOW_SWIRL_RANGE 360
+  #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) {
-  uint16_t hue;
+  uint8_t hue;
   uint8_t i;
 
   for (i = 0; i < RGBLED_NUM; i++) {
-    hue = (RGBLIGHT_RAINBOW_SWIRL_RANGE / RGBLED_NUM * i + anim->current_hue) % 360;
+    hue = (RGBLIGHT_RAINBOW_SWIRL_RANGE / RGBLED_NUM * i + anim->current_hue);
     sethsv(hue, rgblight_config.sat, rgblight_config.val, (LED_TYPE *)&led[i]);
   }
   rgblight_set();
 
   if (anim->delta % 2) {
-    anim->current_hue = (anim->current_hue + 1) % 360;
+    anim->current_hue++;
   } else {
-    if (anim->current_hue - 1 < 0) {
-      anim->current_hue = 359;
-    } else {
-      anim->current_hue = anim->current_hue - 1;
-    }
+    anim->current_hue--;
   }
 }
 #endif
@@ -1146,12 +1060,12 @@ void rgblight_effect_knight(animation_status_t *anim) {
 
 #ifdef RGBLIGHT_EFFECT_CHRISTMAS
 void rgblight_effect_christmas(animation_status_t *anim) {
-  uint16_t hue;
+  uint8_t hue;
   uint8_t i;
 
   anim->current_offset = (anim->current_offset + 1) % 2;
   for (i = 0; i < RGBLED_NUM; i++) {
-    hue = 0 + ((i/RGBLIGHT_EFFECT_CHRISTMAS_STEP + anim->current_offset) % 2) * 120;
+    hue = 0 + ((i/RGBLIGHT_EFFECT_CHRISTMAS_STEP + anim->current_offset) % 2) * 85;
     sethsv(hue, rgblight_config.sat, rgblight_config.val, (LED_TYPE *)&led[i]);
   }
   rgblight_set();
diff --git a/quantum/rgblight.h b/quantum/rgblight.h
index 748d009dcf..35d7942ca6 100644
--- a/quantum/rgblight.h
+++ b/quantum/rgblight.h
@@ -80,9 +80,7 @@ enum RGBLIGHT_EFFECT_MODE {
 
 #define RGBLIGHT_MODES (RGBLIGHT_MODE_last-1)
 
-#ifndef RGBLIGHT_EFFECT_BREATHE_CENTER
-#define RGBLIGHT_EFFECT_BREATHE_CENTER 1.85  // 1-2.7
-#endif
+// sample: #define RGBLIGHT_EFFECT_BREATHE_CENTER   1.85
 
 #ifndef RGBLIGHT_EFFECT_BREATHE_MAX
 #define RGBLIGHT_EFFECT_BREATHE_MAX 255   // 0-255
@@ -113,7 +111,7 @@ enum RGBLIGHT_EFFECT_MODE {
 #endif
 
 #ifndef RGBLIGHT_HUE_STEP
-#define RGBLIGHT_HUE_STEP 10
+#define RGBLIGHT_HUE_STEP 8
 #endif
 #ifndef RGBLIGHT_SAT_STEP
 #define RGBLIGHT_SAT_STEP 17
@@ -151,12 +149,13 @@ 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  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
@@ -211,19 +210,19 @@ void rgblight_increase_val(void);
 void rgblight_decrease_val(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);
+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);
+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(uint16_t hue, uint8_t sat, uint8_t val, 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_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(uint16_t hue, uint8_t sat, uint8_t val);
-void rgblight_sethsv_slave(uint16_t hue, uint8_t sat, uint8_t val);
+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);
 void rgblight_set_clipping_range(uint8_t start_pos, uint8_t num_leds);
 
 uint32_t eeconfig_read_rgblight(void);
@@ -234,10 +233,10 @@ 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 sethsv(uint8_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_sethsv_noeeprom(uint8_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);
@@ -251,7 +250,7 @@ void rgblight_decrease_sat_noeeprom(void);
 void rgblight_increase_val_noeeprom(void);
 void rgblight_decrease_val_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);
 
 
@@ -274,7 +273,7 @@ typedef struct _animation_status_t {
     union {
         uint16_t pos16;
         uint8_t  pos;
-        int16_t  current_hue;
+        int8_t   current_hue;
         uint16_t current_offset;
     };
 } animation_status_t;
diff --git a/quantum/rgblight_breathe_table.h b/quantum/rgblight_breathe_table.h
new file mode 100644
index 0000000000..7ab8cc9479
--- /dev/null
+++ b/quantum/rgblight_breathe_table.h
@@ -0,0 +1,116 @@
+#ifndef RGBLIGHT_EFFECT_BREATHE_TABLE
+#define RGBLIGHT_EFFECT_BREATHE_TABLE
+
+const uint8_t rgblight_effect_breathe_table[] PROGMEM = {
+  /* #define RGBLIGHT_EFFECT_BREATHE_CENTER   1.85 */
+  /* #define RGBLIGHT_EFFECT_BREATHE_MAX      255 */
+
+ #if RGBLIGHT_BREATHE_TABLE_SIZE == 256
+  0x22,  0x23,  0x25,  0x26,  0x28,  0x29,  0x2a,  0x2c,
+  0x2d,  0x2f,  0x30,  0x32,  0x33,  0x35,  0x36,  0x38,
+  0x3a,  0x3b,  0x3d,  0x3e,  0x40,  0x42,  0x43,  0x45,
+  0x47,  0x49,  0x4a,  0x4c,  0x4e,  0x50,  0x51,  0x53,
+  0x55,  0x57,  0x59,  0x5a,  0x5c,  0x5e,  0x60,  0x62,
+  0x64,  0x66,  0x68,  0x69,  0x6b,  0x6d,  0x6f,  0x71,
+  0x73,  0x75,  0x77,  0x79,  0x7b,  0x7d,  0x7f,  0x81,
+  0x83,  0x85,  0x87,  0x89,  0x8a,  0x8c,  0x8e,  0x90,
+  0x92,  0x94,  0x96,  0x98,  0x9a,  0x9c,  0x9e,  0x9f,
+  0xa1,  0xa3,  0xa5,  0xa7,  0xa8,  0xaa,  0xac,  0xae,
+  0xaf,  0xb1,  0xb3,  0xb4,  0xb6,  0xb8,  0xb9,  0xbb,
+  0xbc,  0xbe,  0xbf,  0xc1,  0xc2,  0xc3,  0xc5,  0xc6,
+  0xc7,  0xc9,  0xca,  0xcb,  0xcc,  0xcd,  0xce,  0xd0,
+  0xd1,  0xd2,  0xd2,  0xd3,  0xd4,  0xd5,  0xd6,  0xd7,
+  0xd7,  0xd8,  0xd9,  0xd9,  0xda,  0xda,  0xdb,  0xdb,
+  0xdb,  0xdc,  0xdc,  0xdc,  0xdc,  0xdc,  0xdd,  0xdd,
+  0xdd,  0xdd,  0xdc,  0xdc,  0xdc,  0xdc,  0xdc,  0xdb,
+  0xdb,  0xdb,  0xda,  0xda,  0xd9,  0xd9,  0xd8,  0xd7,
+  0xd7,  0xd6,  0xd5,  0xd4,  0xd3,  0xd2,  0xd2,  0xd1,
+  0xd0,  0xce,  0xcd,  0xcc,  0xcb,  0xca,  0xc9,  0xc7,
+  0xc6,  0xc5,  0xc3,  0xc2,  0xc1,  0xbf,  0xbe,  0xbc,
+  0xbb,  0xb9,  0xb8,  0xb6,  0xb4,  0xb3,  0xb1,  0xaf,
+  0xae,  0xac,  0xaa,  0xa8,  0xa7,  0xa5,  0xa3,  0xa1,
+  0x9f,  0x9e,  0x9c,  0x9a,  0x98,  0x96,  0x94,  0x92,
+  0x90,  0x8e,  0x8c,  0x8a,  0x89,  0x87,  0x85,  0x83,
+  0x81,  0x7f,  0x7d,  0x7b,  0x79,  0x77,  0x75,  0x73,
+  0x71,  0x6f,  0x6d,  0x6b,  0x69,  0x68,  0x66,  0x64,
+  0x62,  0x60,  0x5e,  0x5c,  0x5a,  0x59,  0x57,  0x55,
+  0x53,  0x51,  0x50,  0x4e,  0x4c,  0x4a,  0x49,  0x47,
+  0x45,  0x43,  0x42,  0x40,  0x3e,  0x3d,  0x3b,  0x3a,
+  0x38,  0x36,  0x35,  0x33,  0x32,  0x30,  0x2f,  0x2d,
+  0x2c,  0x2a,  0x29,  0x28,  0x26,  0x25,  0x23,  0x22
+ #endif /* 256 bytes table */
+
+ #if RGBLIGHT_BREATHE_TABLE_SIZE == 128
+  0x22,  0x25,  0x28,  0x2a,
+  0x2d,  0x30,  0x33,  0x36,
+  0x3a,  0x3d,  0x40,  0x43,
+  0x47,  0x4a,  0x4e,  0x51,
+  0x55,  0x59,  0x5c,  0x60,
+  0x64,  0x68,  0x6b,  0x6f,
+  0x73,  0x77,  0x7b,  0x7f,
+  0x83,  0x87,  0x8a,  0x8e,
+  0x92,  0x96,  0x9a,  0x9e,
+  0xa1,  0xa5,  0xa8,  0xac,
+  0xaf,  0xb3,  0xb6,  0xb9,
+  0xbc,  0xbf,  0xc2,  0xc5,
+  0xc7,  0xca,  0xcc,  0xce,
+  0xd1,  0xd2,  0xd4,  0xd6,
+  0xd7,  0xd9,  0xda,  0xdb,
+  0xdb,  0xdc,  0xdc,  0xdd,
+  0xdd,  0xdc,  0xdc,  0xdc,
+  0xdb,  0xda,  0xd9,  0xd8,
+  0xd7,  0xd5,  0xd3,  0xd2,
+  0xd0,  0xcd,  0xcb,  0xc9,
+  0xc6,  0xc3,  0xc1,  0xbe,
+  0xbb,  0xb8,  0xb4,  0xb1,
+  0xae,  0xaa,  0xa7,  0xa3,
+  0x9f,  0x9c,  0x98,  0x94,
+  0x90,  0x8c,  0x89,  0x85,
+  0x81,  0x7d,  0x79,  0x75,
+  0x71,  0x6d,  0x69,  0x66,
+  0x62,  0x5e,  0x5a,  0x57,
+  0x53,  0x50,  0x4c,  0x49,
+  0x45,  0x42,  0x3e,  0x3b,
+  0x38,  0x35,  0x32,  0x2f,
+  0x2c,  0x29,  0x26,  0x23
+ #endif /* 128 bytes table */
+
+ #if RGBLIGHT_BREATHE_TABLE_SIZE == 64
+  0x22,  0x28,
+  0x2d,  0x33,
+  0x3a,  0x40,
+  0x47,  0x4e,
+  0x55,  0x5c,
+  0x64,  0x6b,
+  0x73,  0x7b,
+  0x83,  0x8a,
+  0x92,  0x9a,
+  0xa1,  0xa8,
+  0xaf,  0xb6,
+  0xbc,  0xc2,
+  0xc7,  0xcc,
+  0xd1,  0xd4,
+  0xd7,  0xda,
+  0xdb,  0xdc,
+  0xdd,  0xdc,
+  0xdb,  0xd9,
+  0xd7,  0xd3,
+  0xd0,  0xcb,
+  0xc6,  0xc1,
+  0xbb,  0xb4,
+  0xae,  0xa7,
+  0x9f,  0x98,
+  0x90,  0x89,
+  0x81,  0x79,
+  0x71,  0x69,
+  0x62,  0x5a,
+  0x53,  0x4c,
+  0x45,  0x3e,
+  0x38,  0x32,
+  0x2c,  0x26
+ #endif /* 64 bytes table */
+};
+
+static const int table_scale = 256/sizeof(rgblight_effect_breathe_table);
+
+#endif /* RGBLIGHT_EFFECT_BREATHE_TABLE */
diff --git a/quantum/rgblight_list.h b/quantum/rgblight_list.h
index e024364f05..702e33e765 100644
--- a/quantum/rgblight_list.h
+++ b/quantum/rgblight_list.h
@@ -38,22 +38,22 @@
 /*            HSV COLORS            */
 #define HSV_WHITE          0,   0, 255
 #define HSV_RED            0, 255, 255
-#define HSV_CORAL         16, 176, 255
-#define HSV_ORANGE        39, 255, 255
-#define HSV_GOLDENROD     43, 218, 218
-#define HSV_GOLD          51, 255, 255
-#define HSV_YELLOW        60, 255, 255
-#define HSV_CHARTREUSE    90, 255, 255
-#define HSV_GREEN        120, 255, 255
-#define HSV_SPRINGGREEN  150, 255, 255
-#define HSV_TURQUOISE    174,  90, 112
-#define HSV_TEAL         180, 255, 128
-#define HSV_CYAN         180, 255, 255
-#define HSV_AZURE        186, 102, 255
-#define HSV_BLUE         240, 255, 255
-#define HSV_PURPLE       270, 255, 255
-#define HSV_MAGENTA      300, 255, 255
-#define HSV_PINK         330, 128, 255
+#define HSV_CORAL         11, 176, 255
+#define HSV_ORANGE        28, 255, 255
+#define HSV_GOLDENROD     30, 218, 218
+#define HSV_GOLD          36, 255, 255
+#define HSV_YELLOW        43, 255, 255
+#define HSV_CHARTREUSE    64, 255, 255
+#define HSV_GREEN         85, 255, 255
+#define HSV_SPRINGGREEN  106, 255, 255
+#define HSV_TURQUOISE    123,  90, 112
+#define HSV_TEAL         128, 255, 128
+#define HSV_CYAN         128, 255, 255
+#define HSV_AZURE        132, 102, 255
+#define HSV_BLUE         170, 255, 255
+#define HSV_PURPLE       191, 255, 255
+#define HSV_MAGENTA      213, 255, 255
+#define HSV_PINK         234, 128, 255
 
 
 /*
diff --git a/quantum/stm32/proton_c.mk b/quantum/stm32/proton_c.mk
index a0fa013736..a65e283d3f 100644
--- a/quantum/stm32/proton_c.mk
+++ b/quantum/stm32/proton_c.mk
@@ -42,3 +42,4 @@ OPT_DEFS =
 
 # Options to pass to dfu-util when flashing
 DFU_ARGS = -d 0483:df11 -a 0 -s 0x08000000:leave
+DFU_SUFFIX_ARGS = -p df11 -v 0483
diff --git a/quantum/template/avr/config.h b/quantum/template/avr/config.h
index a9bb754821..48d7afb149 100644
--- a/quantum/template/avr/config.h
+++ b/quantum/template/avr/config.h
@@ -77,6 +77,12 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 //   #define RGBLIGHT_EFFECT_STATIC_GRADIENT
 //   #define RGBLIGHT_EFFECT_RGB_TEST
 //   #define RGBLIGHT_EFFECT_ALTERNATING
+// /*== customize breathing effect ==*/
+//   /*==== (DEFAULT) use fixed table instead of exp() and sin() ====*/
+//   #define RGBLIGHT_BREATHE_TABLE_SIZE 256      // 256(default) or 128 or 64
+//   /*==== use exp() and sin() ====*/
+//   #define RGBLIGHT_EFFECT_BREATHE_CENTER 1.85  // 1 to 2.7
+//   #define RGBLIGHT_EFFECT_BREATHE_MAX    255   // 0 to 255
 // #endif
 
 /* Debounce reduces chatter (unintended double-presses) - set 0 if debouncing is not needed */
diff --git a/show_options.mk b/show_options.mk
index c72059118f..02e062a8d9 100644
--- a/show_options.mk
+++ b/show_options.mk
@@ -88,7 +88,8 @@ OTHER_OPTION_NAMES = \
   RGB_MATRIX_KEYPRESSES \
   LED_MIRRORED \
   RGBLIGHT_FULL_POWER \
-  Link_Time_Optimization
+  Link_Time_Optimization \
+  LINK_TIME_OPTIMIZATION_ENABLE
 
 define NAME_ECHO
 	@echo "  $1 = $($1)		# $(origin $1)"
diff --git a/tmk_core/chibios.mk b/tmk_core/chibios.mk
index 01edebfd74..44c00bdd15 100644
--- a/tmk_core/chibios.mk
+++ b/tmk_core/chibios.mk
@@ -201,6 +201,7 @@ DFU_ARGS ?=
 ifneq ("$(SERIAL)","")
 	DFU_ARGS += -S $(SERIAL)
 endif
+DFU_SUFFIX_ARGS ?=
 
 ST_LINK_ARGS ?=
 
@@ -208,6 +209,7 @@ ST_LINK_ARGS ?=
 EXTRALIBDIRS = $(RULESPATH)/ld
 
 DFU_UTIL ?= dfu-util
+DFU_SUFFIX ?= dfu-suffix
 ST_LINK_CLI ?= st-link_cli
 
 # Generate a .qmk for the QMK-FF
@@ -259,4 +261,7 @@ st-link-cli: $(BUILD_DIR)/$(TARGET).hex sizeafter
 	$(ST_LINK_CLI) $(ST_LINK_ARGS) -q -c SWD -p $(BUILD_DIR)/$(TARGET).hex -Rst
 
 bin: $(BUILD_DIR)/$(TARGET).bin sizeafter
+	if [ ! -z "$(DFU_SUFFIX_ARGS)" ]; then \
+		$(DFU_SUFFIX) $(DFU_SUFFIX_ARGS) -a $(BUILD_DIR)/$(TARGET).bin 1>/dev/null ;\
+	fi
 	$(COPY) $(BUILD_DIR)/$(TARGET).bin $(TARGET).bin;
diff --git a/tmk_core/common.mk b/tmk_core/common.mk
index 94f3c2380d..2216887555 100644
--- a/tmk_core/common.mk
+++ b/tmk_core/common.mk
@@ -208,6 +208,13 @@ ifeq ($(strip $(SHARED_EP_ENABLE)), yes)
     TMK_COMMON_DEFS += -DSHARED_EP_ENABLE
 endif
 
+
+ifeq ($(strip $(LINK_TIME_OPTIMIZATION_ENABLE)), yes)
+    EXTRAFLAGS += -flto
+    TMK_COMMON_DEFS += -DLINK_TIME_OPTIMIZATION_ENABLE
+    TMK_COMMON_DEFS += -DNO_ACTION_MACRO
+    TMK_COMMON_DEFS += -DNO_ACTION_FUNCTION
+endif
 # Bootloader address
 ifdef STM32_BOOTLOADER_ADDRESS
     TMK_COMMON_DEFS += -DSTM32_BOOTLOADER_ADDRESS=$(STM32_BOOTLOADER_ADDRESS)
diff --git a/util/rgblight_breathing_table_calc.c b/util/rgblight_breathing_table_calc.c
new file mode 100644
index 0000000000..fc4d49ea58
--- /dev/null
+++ b/util/rgblight_breathing_table_calc.c
@@ -0,0 +1,49 @@
+//
+// calculate rgblight_effect_breathe_table[] values
+//
+// this is host program for quantum/rgblight.c:void rgblight_effect_breathing();
+//
+// example:
+//  $ edit util/rgblight_breathing_table_calc.c
+//  $ cc -o util/rgblight_breathing_table_calc util/rgblight_breathing_table_calc.c
+//  $ ./util/rgblight_breathing_table_calc > keyboards/KEYBOARD_NAME/keymaps/KEYMAP_NAME/rgblight_breathe_table.h
+//
+#include <stdio.h>
+#include <math.h>
+#include <stdint.h>
+
+/// customize breeathing effect part ///////////////////////////
+#define RGBLIGHT_EFFECT_BREATHE_CENTER 1.85  // 1 to 2.7
+#define RGBLIGHT_EFFECT_BREATHE_MAX    255   // 0 to 255
+////////////////////////////////////////////////////////////////
+
+int main(void) {
+    int pos, step;
+    int table[256];
+    for (pos = 0; pos < 256; pos ++ ) {
+        table[pos] = (uint8_t)(
+              (exp(sin((pos/255.0)*M_PI))- RGBLIGHT_EFFECT_BREATHE_CENTER/M_E)
+              * (RGBLIGHT_EFFECT_BREATHE_MAX/(M_E-1/M_E))
+              );
+    }
+    printf("#ifndef RGBLIGHT_EFFECT_BREATHE_TABLE\n");
+    printf("#define RGBLIGHT_EFFECT_BREATHE_TABLE\n\n");
+    printf("const uint8_t rgblight_effect_breathe_table[] PROGMEM = {\n");
+    printf("  /* #define RGBLIGHT_EFFECT_BREATHE_CENTER   %.2f */\n", RGBLIGHT_EFFECT_BREATHE_CENTER);
+    printf("  /* #define RGBLIGHT_EFFECT_BREATHE_MAX      %d */\n", RGBLIGHT_EFFECT_BREATHE_MAX);
+
+    for (int s = 0, step = (1<<s); s < 3 ; s += 1, step = (1<<s) ) {
+        printf("\n #if RGBLIGHT_BREATHE_TABLE_SIZE == %d\n",
+               s == 0 ? 256:(s== 1 ? 128: 64));
+        for (pos = 0; pos < 256; pos += step ) {
+            printf("  0x%x%s", table[pos], (pos+step)>=256?"":"," );
+            if ((pos+step) % 8 == 0)
+                printf("\n");
+        }
+        printf(" #endif /* %d bytes table */\n", s == 0 ? 256:(s== 1 ? 128: 64));
+    }
+    printf("};\n");
+    printf("\nstatic const int table_scale = 256/sizeof(rgblight_effect_breathe_table);\n");
+    printf("\n#endif /* RGBLIGHT_EFFECT_BREATHE_TABLE */\n");
+    return 0;
+}