Merged from upstream

31 files changed, 2378 insertions, 585 deletions

diff --git a/quantum/api.c b/quantum/api.c
new file mode 100644
index 0000000000..6a7c0a4332
--- /dev/null
+++ b/quantum/api.c
@@ -0,0 +1,179 @@
+#include "api.h"
+#include "quantum.h"
+
+void dword_to_bytes(uint32_t dword, uint8_t * bytes) {
+    bytes[0] = (dword >> 24) & 0xFF;
+    bytes[1] = (dword >> 16) & 0xFF; 
+    bytes[2] = (dword >> 8) & 0xFF; 
+    bytes[3] = (dword >> 0) & 0xFF; 
+}
+
+uint32_t bytes_to_dword(uint8_t * bytes, uint8_t index) {
+    return ((uint32_t)bytes[index + 0] << 24) | ((uint32_t)bytes[index + 1] << 16) | ((uint32_t)bytes[index + 2] << 8) | (uint32_t)bytes[index + 3];
+}
+
+__attribute__ ((weak))
+bool process_api_quantum(uint8_t length, uint8_t * data) {
+    return process_api_keyboard(length, data);
+}
+
+__attribute__ ((weak))
+bool process_api_keyboard(uint8_t length, uint8_t * data) {
+    return process_api_user(length, data);
+}
+
+__attribute__ ((weak))
+bool process_api_user(uint8_t length, uint8_t * data) {
+    return true;
+}
+
+void process_api(uint16_t length, uint8_t * data) {
+    // SEND_STRING("\nRX: ");
+    // for (uint8_t i = 0; i < length; i++) {
+    //     send_byte(data[i]);
+    //     SEND_STRING(" ");
+    // }
+    if (!process_api_quantum(length, data))
+        return;
+
+    switch (data[0]) {
+        case MT_SET_DATA:
+            switch (data[1]) {
+                case DT_DEFAULT_LAYER: {
+                    eeconfig_update_default_layer(data[2]);
+                    default_layer_set((uint32_t)(data[2]));
+                    break;
+                }
+                case DT_KEYMAP_OPTIONS: {
+                    eeconfig_update_keymap(data[2]);
+                    break;
+                }
+                case DT_RGBLIGHT: {
+                    #ifdef RGBLIGHT_ENABLE
+                        uint32_t rgblight = bytes_to_dword(data, 2);
+                        rgblight_update_dword(rgblight);
+                    #endif
+                    break;
+                }
+            }
+        case MT_GET_DATA:
+            switch (data[1]) {
+                case DT_HANDSHAKE: {
+                    MT_GET_DATA_ACK(DT_HANDSHAKE, NULL, 0);
+                    break;
+                }
+                case DT_DEBUG: {
+                    uint8_t debug_bytes[1] = { eeprom_read_byte(EECONFIG_DEBUG) };
+                    MT_GET_DATA_ACK(DT_DEBUG, debug_bytes, 1);
+                    break;
+                }
+                case DT_DEFAULT_LAYER: {
+                    uint8_t default_bytes[1] = { eeprom_read_byte(EECONFIG_DEFAULT_LAYER) };
+                    MT_GET_DATA_ACK(DT_DEFAULT_LAYER, default_bytes, 1);
+                    break;
+                }
+                case DT_CURRENT_LAYER: {
+                    uint8_t layer_state_bytes[4];
+                    dword_to_bytes(layer_state, layer_state_bytes);
+                    MT_GET_DATA_ACK(DT_CURRENT_LAYER, layer_state_bytes, 4);
+                    break;
+                }
+                case DT_AUDIO: {
+                    #ifdef AUDIO_ENABLE
+                        uint8_t audio_bytes[1] = { eeprom_read_byte(EECONFIG_AUDIO) };
+                        MT_GET_DATA_ACK(DT_AUDIO, audio_bytes, 1);
+                    #else
+                        MT_GET_DATA_ACK(DT_AUDIO, NULL, 0);
+                    #endif
+                    break;
+                }
+                case DT_BACKLIGHT: {
+                    #ifdef BACKLIGHT_ENABLE
+                        uint8_t backlight_bytes[1] = { eeprom_read_byte(EECONFIG_BACKLIGHT) };
+                        MT_GET_DATA_ACK(DT_BACKLIGHT, backlight_bytes, 1);
+                    #else
+                        MT_GET_DATA_ACK(DT_BACKLIGHT, NULL, 0);
+                    #endif
+                    break;
+                }
+                case DT_RGBLIGHT: {
+                    #ifdef RGBLIGHT_ENABLE
+                        uint8_t rgblight_bytes[4];
+                        dword_to_bytes(eeconfig_read_rgblight(), rgblight_bytes);
+                        MT_GET_DATA_ACK(DT_RGBLIGHT, rgblight_bytes, 4);
+                    #else
+                        MT_GET_DATA_ACK(DT_RGBLIGHT, NULL, 0);
+                    #endif
+                    break;
+                }
+                case DT_KEYMAP_OPTIONS: {
+                    uint8_t keymap_bytes[1] = { eeconfig_read_keymap() };
+                    MT_GET_DATA_ACK(DT_KEYMAP_OPTIONS, keymap_bytes, 1);
+                    break;
+                }
+                case DT_KEYMAP_SIZE: {
+                    uint8_t keymap_size[2] = {MATRIX_ROWS, MATRIX_COLS};
+                    MT_GET_DATA_ACK(DT_KEYMAP_SIZE, keymap_size, 2);
+                    break;
+                }
+                // This may be too much
+                // case DT_KEYMAP: {
+                //     uint8_t keymap_data[MATRIX_ROWS * MATRIX_COLS * 4 + 3];
+                //     keymap_data[0] = data[2];
+                //     keymap_data[1] = MATRIX_ROWS;
+                //     keymap_data[2] = MATRIX_COLS;
+                //     for (int i = 0; i < MATRIX_ROWS; i++) {
+                //         for (int j = 0; j < MATRIX_COLS; j++) {
+                //             keymap_data[3 + (i*MATRIX_COLS*2) + (j*2)] = pgm_read_word(&keymaps[data[2]][i][j]) >> 8;
+                //             keymap_data[3 + (i*MATRIX_COLS*2) + (j*2) + 1] = pgm_read_word(&keymaps[data[2]][i][j]) & 0xFF;
+                //         }
+                //     }
+                //     MT_GET_DATA_ACK(DT_KEYMAP, keymap_data, MATRIX_ROWS * MATRIX_COLS * 4 + 3);
+                //     // uint8_t keymap_data[5];
+                //     // keymap_data[0] = data[2];
+                //     // keymap_data[1] = data[3];
+                //     // keymap_data[2] = data[4];
+                //     // keymap_data[3] = pgm_read_word(&keymaps[data[2]][data[3]][data[4]]) >> 8;
+                //     // keymap_data[4] = pgm_read_word(&keymaps[data[2]][data[3]][data[4]]) & 0xFF;
+
+                //     // MT_GET_DATA_ACK(DT_KEYMAP, keymap_data, 5);
+                //     break;
+                // }
+                default:
+                    break;
+            }
+            break;
+        case MT_SET_DATA_ACK:
+        case MT_GET_DATA_ACK:
+            break;
+        case MT_SEND_DATA:
+            break;
+        case MT_SEND_DATA_ACK:
+            break;
+        case MT_EXE_ACTION:
+            break;
+        case MT_EXE_ACTION_ACK:
+            break;
+        case MT_TYPE_ERROR:
+            break;
+        default: ; // command not recognised
+            SEND_BYTES(MT_TYPE_ERROR, DT_NONE, data, length);
+            break;
+
+        // #ifdef RGBLIGHT_ENABLE
+        // case 0x27: ; // RGB LED functions
+        //     switch (*data++) {
+        //         case 0x00: ; // Update HSV
+        //             rgblight_sethsv((data[0] << 8 | data[1]) % 360, data[2], data[3]);
+        //             break;
+        //         case 0x01: ; // Update RGB
+        //             break;
+        //         case 0x02: ; // Update mode
+        //             rgblight_mode(data[0]);
+        //             break;
+        //     }
+        //     break;
+        // #endif
+    }
+
+}
\ No newline at end of file
diff --git a/quantum/api.h b/quantum/api.h
new file mode 100644
index 0000000000..00dcdb8954
--- /dev/null
+++ b/quantum/api.h
@@ -0,0 +1,59 @@
+#ifndef _API_H_
+#define _API_H_
+
+#include "lufa.h"
+
+enum MESSAGE_TYPE {
+    MT_GET_DATA =      0x10, // Get data from keyboard
+    MT_GET_DATA_ACK =  0x11, // returned data to process (ACK)
+    MT_SET_DATA =      0x20, // Set data on keyboard
+    MT_SET_DATA_ACK =  0x21, // returned data to confirm (ACK)
+    MT_SEND_DATA =     0x30, // Sending data/action from keyboard
+    MT_SEND_DATA_ACK = 0x31, // returned data/action confirmation (ACK)
+    MT_EXE_ACTION =    0x40, // executing actions on keyboard
+    MT_EXE_ACTION_ACK =0x41, // return confirmation/value (ACK)
+    MT_TYPE_ERROR =    0x80 // type not recofgnised (ACK)
+};
+
+enum DATA_TYPE {
+    DT_NONE = 0x00,
+    DT_HANDSHAKE,
+    DT_DEFAULT_LAYER,
+    DT_CURRENT_LAYER,
+    DT_KEYMAP_OPTIONS,
+    DT_BACKLIGHT,
+    DT_RGBLIGHT,
+    DT_UNICODE,
+    DT_DEBUG,
+    DT_AUDIO,
+    DT_QUANTUM_ACTION,
+    DT_KEYBOARD_ACTION,
+    DT_USER_ACTION,
+    DT_KEYMAP_SIZE,
+    DT_KEYMAP
+};
+
+void dword_to_bytes(uint32_t dword, uint8_t * bytes);
+uint32_t bytes_to_dword(uint8_t * bytes, uint8_t index);
+
+#define MT_GET_DATA(data_type, data, length) SEND_BYTES(MT_GET_DATA, data_type, data, length)
+#define MT_GET_DATA_ACK(data_type, data, length) SEND_BYTES(MT_GET_DATA_ACK, data_type, data, length)
+#define MT_SET_DATA(data_type, data, length) SEND_BYTES(MT_SET_DATA, data_type, data, length)
+#define MT_SET_DATA_ACK(data_type, data, length) SEND_BYTES(MT_SET_DATA_ACK, data_type, data, length)
+#define MT_SEND_DATA(data_type, data, length) SEND_BYTES(MT_SEND_DATA, data_type, data, length)
+#define MT_SEND_DATA_ACK(data_type, data, length) SEND_BYTES(MT_SEND_DATA_ACK, data_type, data, length)
+#define MT_EXE_ACTION(data_type, data, length) SEND_BYTES(MT_EXE_ACTION, data_type, data, length)
+#define MT_EXE_ACTION_ACK(data_type, data, length) SEND_BYTES(MT_EXE_ACTION_ACK, data_type, data, length)
+
+void process_api(uint16_t length, uint8_t * data);
+
+__attribute__ ((weak))
+bool process_api_quantum(uint8_t length, uint8_t * data);
+
+__attribute__ ((weak))
+bool process_api_keyboard(uint8_t length, uint8_t * data);
+
+__attribute__ ((weak))
+bool process_api_user(uint8_t length, uint8_t * data);
+
+#endif
\ No newline at end of file
diff --git a/quantum/api/api_sysex.c b/quantum/api/api_sysex.c
new file mode 100644
index 0000000000..868f854b92
--- /dev/null
+++ b/quantum/api/api_sysex.c
@@ -0,0 +1,57 @@
+#include "api_sysex.h"
+#include "sysex_tools.h"
+#include "print.h"
+
+void send_bytes_sysex(uint8_t message_type, uint8_t data_type, uint8_t * bytes, uint16_t length) {
+    // SEND_STRING("\nTX: ");
+    // for (uint8_t i = 0; i < length; i++) {
+    //     send_byte(bytes[i]);
+    //     SEND_STRING(" ");
+    // }
+    if (length > API_SYSEX_MAX_SIZE) {
+        xprintf("Sysex msg too big %d %d %d", message_type, data_type, length);
+        return;
+    }
+
+
+    // The buffer size required is calculated as the following
+    // API_SYSEX_MAX_SIZE is the maximum length
+    // In addition to that we have a two byte message header consisting of the message_type and data_type
+    // This has to be encoded with an additional overhead of one byte for every starting 7 bytes
+    // We just add one extra byte in case it's not divisible by 7
+    // Then we have an unencoded header consisting of 4 bytes
+    // Plus a one byte terminator
+    const unsigned message_header = 2;
+    const unsigned unencoded_message = API_SYSEX_MAX_SIZE + message_header;
+    const unsigned encoding_overhead = unencoded_message / 7 + 1;
+    const unsigned encoded_size = unencoded_message + encoding_overhead;
+    const unsigned unencoded_header = 4;
+    const unsigned terminator = 1;
+    const unsigned buffer_size = encoded_size + unencoded_header + terminator;
+    uint8_t buffer[encoded_size + unencoded_header + terminator];
+    // The unencoded header
+    buffer[0] = 0xF0;
+    buffer[1] = 0x00;
+    buffer[2] = 0x00;
+    buffer[3] = 0x00;
+
+    // We copy the message to the end of the array, this way we can do an inplace encoding, using the same
+    // buffer for both input and output
+    const unsigned message_size = length + message_header;
+    uint8_t* unencoded_start = buffer + buffer_size - message_size;
+    uint8_t* ptr = unencoded_start;
+    *(ptr++) = message_type;
+    *(ptr++) = data_type;
+    memcpy(ptr, bytes, length);
+
+    unsigned encoded_length = sysex_encode(buffer + unencoded_header, unencoded_start, message_size);
+    unsigned final_size = unencoded_header + encoded_length + terminator;
+    buffer[final_size - 1] = 0xF7;
+    midi_send_array(&midi_device, final_size, buffer);
+
+    // SEND_STRING("\nTD: ");
+    // for (uint8_t i = 0; i < encoded_length + 5; i++) {
+    //     send_byte(buffer[i]);
+    //     SEND_STRING(" ");
+    // }
+}
diff --git a/quantum/api/api_sysex.h b/quantum/api/api_sysex.h
new file mode 100644
index 0000000000..b947b60e54
--- /dev/null
+++ b/quantum/api/api_sysex.h
@@ -0,0 +1,10 @@
+#ifndef _API_SYSEX_H_
+#define _API_SYSEX_H_
+
+#include "api.h"
+
+void send_bytes_sysex(uint8_t message_type, uint8_t data_type, uint8_t * bytes, uint16_t length);
+
+#define SEND_BYTES(mt, dt, b, l) send_bytes_sysex(mt, dt, b, l)
+
+#endif
\ No newline at end of file
diff --git a/quantum/audio/audio.c b/quantum/audio/audio.c
index ead5fbf3e9..2a315fd168 100644
--- a/quantum/audio/audio.c
+++ b/quantum/audio/audio.c
@@ -77,6 +77,7 @@ static bool audio_initialized = false;
 audio_config_t audio_config;
 
 uint16_t envelope_index = 0;
+bool glissando = true;
 
 void audio_init()
 {
@@ -205,13 +206,17 @@ ISR(TIMER3_COMPA_vect)
 					freq = frequencies[voice_place];
 				#endif
 			} else {
-				if (frequency != 0 && frequency < frequencies[voices - 1] && frequency < frequencies[voices - 1] * pow(2, -440/frequencies[voices - 1]/12/2)) {
-					frequency = frequency * pow(2, 440/frequency/12/2);
-				} else if (frequency != 0 && frequency > frequencies[voices - 1] && frequency > frequencies[voices - 1] * pow(2, 440/frequencies[voices - 1]/12/2)) {
-					frequency = frequency * pow(2, -440/frequency/12/2);
+				if (glissando) {
+					if (frequency != 0 && frequency < frequencies[voices - 1] && frequency < frequencies[voices - 1] * pow(2, -440/frequencies[voices - 1]/12/2)) {
+						frequency = frequency * pow(2, 440/frequency/12/2);
+					} else if (frequency != 0 && frequency > frequencies[voices - 1] && frequency > frequencies[voices - 1] * pow(2, 440/frequencies[voices - 1]/12/2)) {
+						frequency = frequency * pow(2, -440/frequency/12/2);
+					} else {
+						frequency = frequencies[voices - 1];
+					}
 				} else {
 					frequency = frequencies[voices - 1];
-				}
+				}				
 
 				#ifdef VIBRATO_ENABLE
 					if (vibrato_strength > 0) {
diff --git a/quantum/audio/voices.c b/quantum/audio/voices.c
index 6d4172a06c..8326e91eaa 100644
--- a/quantum/audio/voices.c
+++ b/quantum/audio/voices.c
@@ -6,6 +6,7 @@
 extern uint16_t envelope_index;
 extern float note_timbre;
 extern float polyphony_rate;
+extern bool glissando;
 
 voice_type voice = default_voice;
 
@@ -18,7 +19,7 @@ void voice_iterate() {
 }
 
 void voice_deiterate() {
-    voice = (voice - 1) % number_of_voices;
+    voice = (voice - 1 + number_of_voices) % number_of_voices;
 }
 
 float voice_envelope(float frequency) {
@@ -27,11 +28,122 @@ float voice_envelope(float frequency) {
 
     switch (voice) {
         case default_voice:
+            glissando = true;
             note_timbre = TIMBRE_50;
             polyphony_rate = 0;
 	        break;
 
+    #ifdef AUDIO_VOICES
+
+        case something:
+            glissando = false;
+            polyphony_rate = 0;
+            switch (compensated_index) {
+                case 0 ... 9:
+                    note_timbre = TIMBRE_12;
+                    break;
+
+                case 10 ... 19:
+                    note_timbre = TIMBRE_25;
+                    break;
+
+                case 20 ... 200:
+                    note_timbre = .125 + .125;
+                    break;
+
+                default:
+                    note_timbre = .125;
+                    break;
+            }
+            break;
+
+        case drums:
+            glissando = false;
+            polyphony_rate = 0;
+                // switch (compensated_index) {
+                //     case 0 ... 10:
+                //         note_timbre = 0.5;
+                //         break;
+                //     case 11 ... 20:
+                //         note_timbre = 0.5 * (21 - compensated_index) / 10;
+                //         break;
+                //     default:
+                //         note_timbre = 0;
+                //         break;
+                // }
+                // frequency = (rand() % (int)(frequency * 1.2 - frequency)) + (frequency * 0.8);
+
+            if (frequency < 80.0) {
+
+            } else if (frequency < 160.0) {
+
+                // Bass drum: 60 - 100 Hz
+                frequency = (rand() % (int)(40)) + 60;
+                switch (envelope_index) {
+                    case 0 ... 10:
+                        note_timbre = 0.5;
+                        break;
+                    case 11 ... 20:
+                        note_timbre = 0.5 * (21 - envelope_index) / 10;
+                        break;
+                    default:
+                        note_timbre = 0;
+                        break;
+                }
+
+            } else if (frequency < 320.0) {
+
+
+                // Snare drum: 1 - 2 KHz
+                frequency = (rand() % (int)(1000)) + 1000;
+                switch (envelope_index) {
+                    case 0 ... 5:
+                        note_timbre = 0.5;
+                        break;
+                    case 6 ... 20:
+                        note_timbre = 0.5 * (21 - envelope_index) / 15;
+                        break;
+                    default:
+                        note_timbre = 0;
+                        break;
+                }
+
+            } else if (frequency < 640.0) {
+
+                // Closed Hi-hat: 3 - 5 KHz
+                frequency = (rand() % (int)(2000)) + 3000;
+                switch (envelope_index) {
+                    case 0 ... 15:
+                        note_timbre = 0.5;
+                        break;
+                    case 16 ... 20:
+                        note_timbre = 0.5 * (21 - envelope_index) / 5;
+                        break;
+                    default:
+                        note_timbre = 0;
+                        break;
+                }
+
+            } else if (frequency < 1280.0) {
+
+                // Open Hi-hat: 3 - 5 KHz
+                frequency = (rand() % (int)(2000)) + 3000;
+                switch (envelope_index) {
+                    case 0 ... 35:
+                        note_timbre = 0.5;
+                        break;
+                    case 36 ... 50:
+                        note_timbre = 0.5 * (51 - envelope_index) / 15;
+                        break;
+                    default:
+                        note_timbre = 0;
+                        break;
+                }
+
+            }
+            break;
         case butts_fader:
+            glissando = true;
             polyphony_rate = 0;
             switch (compensated_index) {
                 case 0 ... 9:
@@ -79,6 +191,7 @@ float voice_envelope(float frequency) {
 
         case duty_osc:
             // This slows the loop down a substantial amount, so higher notes may freeze
+            glissando = true;
             polyphony_rate = 0;
             switch (compensated_index) {
                 default:
@@ -93,6 +206,7 @@ float voice_envelope(float frequency) {
 	        break;
 
         case duty_octave_down:
+            glissando = true;
             polyphony_rate = 0;
             note_timbre = (envelope_index % 2) * .125 + .375 * 2;
             if ((envelope_index % 4) == 0)
@@ -101,6 +215,7 @@ float voice_envelope(float frequency) {
                 note_timbre = 0;
             break;
         case delayed_vibrato:
+            glissando = true;
             polyphony_rate = 0;
             note_timbre = TIMBRE_50;
             #define VOICE_VIBRATO_DELAY 150
@@ -155,11 +270,11 @@ float voice_envelope(float frequency) {
         //         note_timbre = 0.25;
         //     break;
 
+    #endif
+
 		default:
    			break;
     }
 
     return frequency;
 }
-
-
diff --git a/quantum/audio/voices.h b/quantum/audio/voices.h
index b2495b23b5..52f7e006d6 100644
--- a/quantum/audio/voices.h
+++ b/quantum/audio/voices.h
@@ -11,6 +11,9 @@ float voice_envelope(float frequency);
 
 typedef enum {
     default_voice,
+    #ifdef AUDIO_VOICES
+    something,
+    drums,
     butts_fader,
     octave_crunch,
     duty_osc,
@@ -21,6 +24,7 @@ typedef enum {
     // duty_fourth_down,
     // duty_third_down,
     // duty_fifth_third_down,
+    #endif
     number_of_voices // important that this is last
 } voice_type;
 
diff --git a/quantum/config_common.h b/quantum/config_common.h
index 8ed5f4a106..4bdb2065d9 100644
--- a/quantum/config_common.h
+++ b/quantum/config_common.h
@@ -5,55 +5,56 @@
 #define COL2ROW 0
 #define ROW2COL 1
 /* I/O pins */
-#define B0 0x30
-#define B1 0x31
-#define B2 0x32
-#define B3 0x33
-#define B4 0x34
-#define B5 0x35
-#define B6 0x36
-#define B7 0x37
-#define C0 0x60
-#define C1 0x61
-#define C2 0x62
-#define C3 0x63
-#define C4 0x64
-#define C5 0x65
-#define C6 0x66
-#define C7 0x67
-#define D0 0x90
-#define D1 0x91
-#define D2 0x92
-#define D3 0x93
-#define D4 0x94
-#define D5 0x95
-#define D6 0x96
-#define D7 0x97
-#define E0 0xC0
-#define E1 0xC1
-#define E2 0xC2
-#define E3 0xC3
-#define E4 0xC4
-#define E5 0xC5
-#define E6 0xC6
-#define E7 0xC7
-#define F0 0xF0
-#define F1 0xF1
-#define F2 0xF2
-#define F3 0xF3
-#define F4 0xF4
-#define F5 0xF5
-#define F6 0xF6
-#define F7 0xF7
-#define A0 0x00
-#define A1 0x01
-#define A2 0x02
-#define A3 0x03
-#define A4 0x04
-#define A5 0x05
-#define A6 0x06
-#define A7 0x07
-
+#ifndef F0
+    #define B0 0x30
+    #define B1 0x31
+    #define B2 0x32
+    #define B3 0x33
+    #define B4 0x34
+    #define B5 0x35
+    #define B6 0x36
+    #define B7 0x37
+    #define C0 0x60
+    #define C1 0x61
+    #define C2 0x62
+    #define C3 0x63
+    #define C4 0x64
+    #define C5 0x65
+    #define C6 0x66
+    #define C7 0x67
+    #define D0 0x90
+    #define D1 0x91
+    #define D2 0x92
+    #define D3 0x93
+    #define D4 0x94
+    #define D5 0x95
+    #define D6 0x96
+    #define D7 0x97
+    #define E0 0xC0
+    #define E1 0xC1
+    #define E2 0xC2
+    #define E3 0xC3
+    #define E4 0xC4
+    #define E5 0xC5
+    #define E6 0xC6
+    #define E7 0xC7
+    #define F0 0xF0
+    #define F1 0xF1
+    #define F2 0xF2
+    #define F3 0xF3
+    #define F4 0xF4
+    #define F5 0xF5
+    #define F6 0xF6
+    #define F7 0xF7
+    #define A0 0x00
+    #define A1 0x01
+    #define A2 0x02
+    #define A3 0x03
+    #define A4 0x04
+    #define A5 0x05
+    #define A6 0x06
+    #define A7 0x07
+#endif
 
 /* USART configuration */
 #ifdef BLUETOOTH_ENABLE
@@ -76,53 +77,9 @@
         } while(0)
 #   else
 #       error "USART configuration is needed."
+#   endif
 #endif
 
-// I'm fairly sure these aren't needed, but oh well - Jack
-
-/*
- * PS/2 Interrupt configuration
- */
-#ifdef PS2_USE_INT
-/* uses INT1 for clock line(ATMega32U4) */
-#define PS2_CLOCK_PORT  PORTD
-#define PS2_CLOCK_PIN   PIND
-#define PS2_CLOCK_DDR   DDRD
-#define PS2_CLOCK_BIT   1
-
-#define PS2_DATA_PORT   PORTD
-#define PS2_DATA_PIN    PIND
-#define PS2_DATA_DDR    DDRD
-#define PS2_DATA_BIT    0
-
-#define PS2_INT_INIT()  do {    \
-    EICRA |= ((1<<ISC11) |      \
-              (0<<ISC10));      \
-} while (0)
-#define PS2_INT_ON()  do {      \
-    EIMSK |= (1<<INT1);         \
-} while (0)
-#define PS2_INT_OFF() do {      \
-    EIMSK &= ~(1<<INT1);        \
-} while (0)
-#define PS2_INT_VECT    INT1_vect
-#endif
-
-/*
- * PS/2 Busywait configuration
- */
-#ifdef PS2_USE_BUSYWAIT
-#define PS2_CLOCK_PORT  PORTD
-#define PS2_CLOCK_PIN   PIND
-#define PS2_CLOCK_DDR   DDRD
-#define PS2_CLOCK_BIT   1
-
-#define PS2_DATA_PORT   PORTD
-#define PS2_DATA_PIN    PIND
-#define PS2_DATA_DDR    DDRD
-#define PS2_DATA_BIT    0
-#endif
-
-#endif
+#define API_SYSEX_MAX_SIZE 32
 
 #endif
diff --git a/quantum/keymap.h b/quantum/keymap.h
index 85c090972d..c000d2da8e 100644
--- a/quantum/keymap.h
+++ b/quantum/keymap.h
@@ -38,306 +38,16 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define RESET QK_RESET
 #endif
 
-/* translates key to keycode */
+#include "quantum_keycodes.h"
+
+// translates key to keycode
 uint16_t keymap_key_to_keycode(uint8_t layer, keypos_t key);
 
+// translates function id to action
+uint16_t keymap_function_id_to_action( uint16_t function_id );
+
 extern const uint16_t keymaps[][MATRIX_ROWS][MATRIX_COLS];
 extern const uint16_t fn_actions[];
 
-enum quantum_keycodes {
-    // Ranges used in shortucuts - not to be used directly
-    QK_TMK                = 0x0000,
-    QK_TMK_MAX            = 0x00FF,
-    QK_MODS               = 0x0100,
-    QK_LCTL               = 0x0100,
-    QK_LSFT               = 0x0200,
-    QK_LALT               = 0x0400,
-    QK_LGUI               = 0x0800,
-    QK_RCTL               = 0x1100,
-    QK_RSFT               = 0x1200,
-    QK_RALT               = 0x1400,
-    QK_RGUI               = 0x1800,
-    QK_MODS_MAX           = 0x1FFF,
-    QK_FUNCTION           = 0x2000,
-    QK_FUNCTION_MAX       = 0x2FFF,
-    QK_MACRO              = 0x3000,
-    QK_MACRO_MAX          = 0x3FFF,
-    QK_LAYER_TAP          = 0x4000,
-    QK_LAYER_TAP_MAX      = 0x4FFF,
-    QK_TO                 = 0x5000,
-    QK_TO_MAX             = 0x50FF,
-    QK_MOMENTARY          = 0x5100,
-    QK_MOMENTARY_MAX      = 0x51FF,
-    QK_DEF_LAYER          = 0x5200,
-    QK_DEF_LAYER_MAX      = 0x52FF,
-    QK_TOGGLE_LAYER       = 0x5300,
-    QK_TOGGLE_LAYER_MAX   = 0x53FF,
-    QK_ONE_SHOT_LAYER     = 0x5400,
-    QK_ONE_SHOT_LAYER_MAX = 0x54FF,
-    QK_ONE_SHOT_MOD       = 0x5500,
-    QK_ONE_SHOT_MOD_MAX   = 0x55FF,
-#ifndef DISABLE_CHORDING
-    QK_CHORDING           = 0x5600,
-    QK_CHORDING_MAX       = 0x56FF,
-#endif
-    QK_MOD_TAP            = 0x6000,
-    QK_MOD_TAP_MAX        = 0x6FFF,
-    QK_TAP_DANCE          = 0x7100,
-    QK_TAP_DANCE_MAX      = 0x71FF,
-#ifdef UNICODE_ENABLE
-    QK_UNICODE            = 0x8000,
-    QK_UNICODE_MAX        = 0xFFFF,
-#endif
-
-    // Loose keycodes - to be used directly
-
-    RESET = 0x7000,
-    DEBUG,
-    MAGIC_SWAP_CONTROL_CAPSLOCK,
-    MAGIC_CAPSLOCK_TO_CONTROL,
-    MAGIC_SWAP_LALT_LGUI,
-    MAGIC_SWAP_RALT_RGUI,
-    MAGIC_NO_GUI,
-    MAGIC_SWAP_GRAVE_ESC,
-    MAGIC_SWAP_BACKSLASH_BACKSPACE,
-    MAGIC_HOST_NKRO,
-    MAGIC_SWAP_ALT_GUI,
-    MAGIC_UNSWAP_CONTROL_CAPSLOCK,
-    MAGIC_UNCAPSLOCK_TO_CONTROL,
-    MAGIC_UNSWAP_LALT_LGUI,
-    MAGIC_UNSWAP_RALT_RGUI,
-    MAGIC_UNNO_GUI,
-    MAGIC_UNSWAP_GRAVE_ESC,
-    MAGIC_UNSWAP_BACKSLASH_BACKSPACE,
-    MAGIC_UNHOST_NKRO,
-    MAGIC_UNSWAP_ALT_GUI,
-    MAGIC_TOGGLE_NKRO,
-
-    // Leader key
-#ifndef DISABLE_LEADER
-    KC_LEAD,
-#endif
-
-    // Audio on/off/toggle
-    AU_ON,
-    AU_OFF,
-    AU_TOG,
-
-    // Music mode on/off/toggle
-    MU_ON,
-    MU_OFF,
-    MU_TOG,
-
-    // Music voice iterate
-    MUV_IN,
-    MUV_DE,
-
-    // Midi mode on/off
-    MIDI_ON,
-    MIDI_OFF,
-
-    // Backlight functionality
-    BL_0,
-    BL_1,
-    BL_2,
-    BL_3,
-    BL_4,
-    BL_5,
-    BL_6,
-    BL_7,
-    BL_8,
-    BL_9,
-    BL_10,
-    BL_11,
-    BL_12,
-    BL_13,
-    BL_14,
-    BL_15,
-    BL_DEC,
-    BL_INC,
-    BL_TOGG,
-    BL_STEP,
-
-    // RGB functionality
-    RGB_TOG,
-    RGB_MOD,
-    RGB_HUI,
-    RGB_HUD,
-    RGB_SAI,
-    RGB_SAD,
-    RGB_VAI,
-    RGB_VAD,
-
-    // Left shift, open paren
-    KC_LSPO,
-
-    // Right shift, close paren
-    KC_RSPC,
-
-    // always leave at the end
-    SAFE_RANGE
-};
-
-// Ability to use mods in layouts
-#define LCTL(kc) (kc | QK_LCTL)
-#define LSFT(kc) (kc | QK_LSFT)
-#define LALT(kc) (kc | QK_LALT)
-#define LGUI(kc) (kc | QK_LGUI)
-#define RCTL(kc) (kc | QK_RCTL)
-#define RSFT(kc) (kc | QK_RSFT)
-#define RALT(kc) (kc | QK_RALT)
-#define RGUI(kc) (kc | QK_RGUI)
-
-#define HYPR(kc) (kc | QK_LCTL | QK_LSFT | QK_LALT | QK_LGUI)
-#define MEH(kc)  (kc | QK_LCTL | QK_LSFT | QK_LALT)
-#define LCAG(kc) (kc | QK_LCTL | QK_LALT | QK_LGUI)
-#define ALTG(kc) (kc | QK_RCTL | QK_RALT)
-
-#define MOD_HYPR 0xf
-#define MOD_MEH 0x7
-
-
-// Aliases for shifted symbols
-// Each key has a 4-letter code, and some have longer aliases too.
-// While the long aliases are descriptive, the 4-letter codes
-// make for nicer grid layouts (everything lines up), and are
-// the preferred style for Quantum.
-#define KC_TILD LSFT(KC_GRV)    // ~
-#define KC_TILDE    KC_TILD
-
-#define KC_EXLM LSFT(KC_1)      // !
-#define KC_EXCLAIM  KC_EXLM
-
-#define KC_AT   LSFT(KC_2)      // @
-
-#define KC_HASH LSFT(KC_3)      // #
-
-#define KC_DLR  LSFT(KC_4)      // $
-#define KC_DOLLAR   KC_DLR
-
-#define KC_PERC LSFT(KC_5)      // %
-#define KC_PERCENT  KC_PERC
-
-#define KC_CIRC LSFT(KC_6)      // ^
-#define KC_CIRCUMFLEX   KC_CIRC
-
-#define KC_AMPR LSFT(KC_7)      // &
-#define KC_AMPERSAND    KC_AMPR
-
-#define KC_ASTR LSFT(KC_8)      // *
-#define KC_ASTERISK KC_ASTR
-
-#define KC_LPRN LSFT(KC_9)      // (
-#define KC_LEFT_PAREN   KC_LPRN
-
-#define KC_RPRN LSFT(KC_0)      // )
-#define KC_RIGHT_PAREN  KC_RPRN
-
-#define KC_UNDS LSFT(KC_MINS)   // _
-#define KC_UNDERSCORE   KC_UNDS
-
-#define KC_PLUS LSFT(KC_EQL)    // +
-
-#define KC_LCBR LSFT(KC_LBRC)   // {
-#define KC_LEFT_CURLY_BRACE KC_LCBR
-
-#define KC_RCBR LSFT(KC_RBRC)   // }
-#define KC_RIGHT_CURLY_BRACE    KC_RCBR
-
-#define KC_LABK LSFT(KC_COMM)   // <
-#define KC_LEFT_ANGLE_BRACKET   KC_LABK
-
-#define KC_RABK LSFT(KC_DOT)    // >
-#define KC_RIGHT_ANGLE_BRACKET  KC_RABK
-
-#define KC_COLN LSFT(KC_SCLN)   // :
-#define KC_COLON    KC_COLN
-
-#define KC_PIPE LSFT(KC_BSLS)   // |
-
-#define KC_LT LSFT(KC_COMM)     // <
-
-#define KC_GT LSFT(KC_DOT)      // >
-
-#define KC_QUES LSFT(KC_SLSH)   // ?
-#define KC_QUESTION KC_QUES
-
-#define KC_DQT LSFT(KC_QUOT)   // "
-#define KC_DOUBLE_QUOTE KC_DQT
-#define KC_DQUO KC_DQT
-
-#define KC_DELT KC_DELETE // Del key (four letter code)
-
-// Alias for function layers than expand past FN31
-#define FUNC(kc) (kc | QK_FUNCTION)
-
-// Aliases
-#define S(kc) LSFT(kc)
-#define F(kc) FUNC(kc)
-
-#define M(kc) (kc | QK_MACRO)
-
-#define MACRODOWN(...) (record->event.pressed ? MACRO(__VA_ARGS__) : MACRO_NONE)
-
-// L-ayer, T-ap - 256 keycode max, 16 layer max
-#define LT(layer, kc) (kc | QK_LAYER_TAP | ((layer & 0xF) << 8))
-
-#define AG_SWAP MAGIC_SWAP_ALT_GUI
-#define AG_NORM MAGIC_UNSWAP_ALT_GUI
-
-#define BL_ON  BL_9
-#define BL_OFF BL_0
-
-#define MI_ON MIDI_ON
-#define MI_OFF MIDI_OFF
-
-// GOTO layer - 16 layers max
-// when:
-// ON_PRESS    = 1
-// ON_RELEASE  = 2
-// Unless you have a good reason not to do so, prefer  ON_PRESS (1) as your default.
-// In fact, we changed it to assume ON_PRESS for sanity/simplicity. If needed, you can add your own
-// keycode modeled after the old version, kept below for this.
-/* #define TO(layer, when) (layer | QK_TO | (when << 0x4)) */
-#define TO(layer) (layer | QK_TO | (ON_PRESS << 0x4))
-
-// Momentary switch layer - 256 layer max
-#define MO(layer) (layer | QK_MOMENTARY)
-
-// Set default layer - 256 layer max
-#define DF(layer) (layer | QK_DEF_LAYER)
-
-// Toggle to layer - 256 layer max
-#define TG(layer) (layer | QK_TOGGLE_LAYER)
-
-// One-shot layer - 256 layer max
-#define OSL(layer) (layer | QK_ONE_SHOT_LAYER)
-
-// One-shot mod
-#define OSM(mod) (mod | QK_ONE_SHOT_MOD)
-
-// M-od, T-ap - 256 keycode max
-#define MT(mod, kc) (kc | QK_MOD_TAP | ((mod & 0xF) << 8))
-#define CTL_T(kc) MT(MOD_LCTL, kc)
-#define SFT_T(kc) MT(MOD_LSFT, kc)
-#define ALT_T(kc) MT(MOD_LALT, kc)
-#define GUI_T(kc) MT(MOD_LGUI, kc)
-#define C_S_T(kc) MT((MOD_LCTL | MOD_LSFT), kc) // Control + Shift e.g. for gnome-terminal
-#define MEH_T(kc) MT((MOD_LCTL | MOD_LSFT | MOD_LALT), kc) // Meh is a less hyper version of the Hyper key -- doesn't include Win or Cmd, so just alt+shift+ctrl
-#define LCAG_T(kc) MT((MOD_LCTL | MOD_LALT | MOD_LGUI), kc) // Left control alt and gui
-#define ALL_T(kc) MT((MOD_LCTL | MOD_LSFT | MOD_LALT | MOD_LGUI), kc) // see http://brettterpstra.com/2012/12/08/a-useful-caps-lock-key/
-
-// Dedicated keycode versions for Hyper and Meh, if you want to use them as standalone keys rather than mod-tap
-#define KC_HYPR HYPR(KC_NO)
-#define KC_MEH  MEH(KC_NO)
-
-#ifdef UNICODE_ENABLE
-    // For sending unicode codes.
-    // You may not send codes over 7FFF -- this supports most of UTF8.
-    // To have a key that sends out Œ, go UC(0x0152)
-    #define UNICODE(n) (n | QK_UNICODE)
-    #define UC(n) UNICODE(n)
-#endif
-
 
 #endif
diff --git a/quantum/keymap_common.c b/quantum/keymap_common.c
index 833e5a8f8d..eced3d2bba 100644
--- a/quantum/keymap_common.c
+++ b/quantum/keymap_common.c
@@ -48,12 +48,10 @@ action_t action_for_key(uint8_t layer, keypos_t key)
 
     action_t action;
     uint8_t action_layer, when, mod;
-    // The arm-none-eabi compiler generates out of bounds warnings when using the fn_actions directly for some reason
-    const uint16_t* actions = fn_actions;
 
     switch (keycode) {
         case KC_FN0 ... KC_FN31:
-            action.code = pgm_read_word(&actions[FN_INDEX(keycode)]);
+            action.code = keymap_function_id_to_action(FN_INDEX(keycode));
             break;
         case KC_A ... KC_EXSEL:
         case KC_LCTRL ... KC_RGUI:
@@ -79,7 +77,7 @@ action_t action_for_key(uint8_t layer, keypos_t key)
         case QK_FUNCTION ... QK_FUNCTION_MAX: ;
             // Is a shortcut for function action_layer, pull last 12bits
             // This means we have 4,096 FN macros at our disposal
-            action.code = pgm_read_word(&actions[(int)keycode & 0xFFF]);
+            action.code = keymap_function_id_to_action( (int)keycode & 0xFFF );
             break;
         case QK_MACRO ... QK_MACRO_MAX:
             action.code = ACTION_MACRO(keycode & 0xFF);
@@ -163,9 +161,17 @@ void action_function(keyrecord_t *record, uint8_t id, uint8_t opt)
 {
 }
 
-/* translates key to keycode */
+// translates key to keycode
+__attribute__ ((weak))
 uint16_t keymap_key_to_keycode(uint8_t layer, keypos_t key)
 {
     // Read entire word (16bits)
     return pgm_read_word(&keymaps[(layer)][(key.row)][(key.col)]);
 }
+
+// translates function id to action
+__attribute__ ((weak))
+uint16_t keymap_function_id_to_action( uint16_t function_id )
+{
+	return pgm_read_word(&fn_actions[function_id]);
+}
diff --git a/quantum/keymap_extras/keymap_br_abnt2.h b/quantum/keymap_extras/keymap_br_abnt2.h
new file mode 100644
index 0000000000..0df177721d
--- /dev/null
+++ b/quantum/keymap_extras/keymap_br_abnt2.h
@@ -0,0 +1,58 @@
+#ifndef KEYMAP_BR_ABNT2_H
+#define KEYMAP_BR_ABNT2_H
+
+#include "keymap_common.h"
+
+/* Scan codes for the Brazilian ABNT2 keyboard layout */
+
+#define BR_CCDL KC_SCLN      //  Ç   same scancode as ;: on US layout
+#define BR_SCLN KC_SLSH      //  ;:  same scancode as /? on US layout
+#define BR_QUOT KC_GRV       //  '"  same scancode as `~ on US layout
+#define BR_TILD KC_QUOT      //  ~^  dead keys, same scancode as '" on US layout
+#define BR_ACUT KC_LBRC      //  ´`  dead keys, same scancode as [{ on US layout
+#define BR_LBRC KC_RBRC      //  [{  same scancode as ]} on US layout
+#define BR_RBRC KC_BSLS      //  ]}  same scancode as \| on US layout
+#define BR_BSLS KC_NUBS      //  \|  uses the non-US hash scancode (#~, sometimes §±)
+#define BR_SLSH KC_INT1      //  /?  uses the INTL1 scancode
+
+#define BR_COLN LSFT(BR_SCLN)   // shifted :
+#define BR_DQT  LSFT(BR_QUOT)   // shifted "
+#define BR_CIRC LSFT(BR_TILD)   // shifted ^ (dead key)
+#define BR_GRAV LSFT(BR_ACUT)   // shifted ` (dead key)
+#define BR_LCBR LSFT(BR_LBRC)   // shifted {
+#define BR_RCBR LSFT(BR_RBRC)   // shifted }
+#define BR_PIPE LSFT(BR_BSLS)   // shifted |
+#define BR_QUES LSFT(BR_SLSH)   // shifted ?
+#define BR_TRMA LSFT(KC_6)      // shifted ¨ (dead key - trema accent)
+
+// On the ABNT2 the keypad comma and the keypad dot scancodes are switched
+// (presumably because in Brazil comma is used as the decimal separator)
+#define BR_KPDT KC_KP_COMMA  //  keypad .
+#define BR_KPCM KC_KP_DOT    //  keypad ,
+
+#define BR_1UP    LALT(KC_1)      // 1 superscript                    ¹   alt+1
+#define BR_2UP    LALT(KC_2)      // 2 superscript                    ²   alt+2
+#define BR_3UP    LALT(KC_3)      // 3 superscript                    ³   alt+3
+#define BR_PND    LALT(KC_4)      // Pound sign                       £   alt+4
+#define BR_CENT   LALT(KC_5)      // Cent sign                        ¢   alt+5
+#define BR_NOT    LALT(KC_6)      // Not sign                         ¬   alt+6
+#define BR_SECT   LALT(KC_EQL)    // Section sign                     §   alt+=
+#define BR_FORD   LALT(BR_LBRC)   // Feminine Ordinal Sign            ª   alt+[
+#define BR_MORD   LALT(BR_RBRC)   // Masculine Ordinal Sign           º   alt+]
+#define BR_DGRE   LALT(BR_SLSH)   // Degree sign                      °   alt+/
+
+#define BR_EURO   LALT(KC_E)      // Euro sign                        €   alt+e
+#define BR_NDTD   LALT(BR_TILD)   // Non-dead key tilde               ~   alt+~
+#define BR_NDAC   LALT(BR_ACUT)   // Non-dead key acute accent        ´   alt+´
+#define BR_NDGV   LALT(BR_QUOT)   // Non-dead key grave accent        `   alt+'
+#define BR_NDCR   LALT(BR_CIRC)   // Non-dead key circumflex accent   ^   alt+^ (alt+shift+~)
+#define BR_NDTR   LALT(BR_TRMA)   // Non-dead key trema accent        ¨   alt+¨ (alt+shift+6)
+
+// For 101-key keyboard layouts, the ABNT2 layout allows
+// the slash and question mark to be typed using alt+q and alt+w.
+// The shortcuts are provided here for completeness' sake,
+// but it's recommended to use BR_SLSH and BR_QUES instead
+#define BR_ASLS   LALT(KC_Q)
+#define BR_AQST   LALT(KC_W)
+
+#endif
diff --git a/quantum/keymap_extras/keymap_dvp.h b/quantum/keymap_extras/keymap_dvp.h
new file mode 100644
index 0000000000..83f49a52b5
--- /dev/null
+++ b/quantum/keymap_extras/keymap_dvp.h
@@ -0,0 +1,82 @@
+#ifndef KEYMAP_DVP_H
+#define KEYMAP_DVP_H
+
+#include "keymap.h"
+
+// Normal characters
+#define DP_DLR	KC_GRV
+#define DP_AMPR	KC_1
+#define DP_LBRC	KC_2
+#define DP_LCBR	KC_3
+#define DP_RCBR	KC_4
+#define DP_LPRN	KC_5
+#define DP_EQL	KC_6
+#define DP_ASTR	KC_7
+#define DP_RPRN	KC_8
+#define DP_PLUS	KC_9
+#define DP_RBRC	KC_0
+#define DP_EXLM	KC_MINS
+#define DP_HASH	KC_EQL
+
+#define DP_SCLN	KC_Q
+#define DP_COMM	KC_W
+#define DP_DOT	KC_E
+#define DP_P	KC_R
+#define DP_Y	KC_T
+#define DP_F	KC_Y
+#define DP_G	KC_U
+#define DP_C	KC_I
+#define DP_R	KC_O
+#define DP_L	KC_P
+#define DP_SLSH	KC_LBRC
+#define DP_AT	KC_RBRC
+#define DP_BSLS	KC_BSLS
+
+#define DP_A	KC_A
+#define DP_O	KC_S
+#define DP_E	KC_D
+#define DP_U	KC_F
+#define DP_I	KC_G
+#define DP_D	KC_H
+#define DP_H	KC_J
+#define DP_T	KC_K
+#define DP_N	KC_L
+#define DP_S	KC_SCLN
+#define DP_MINS	KC_QUOT
+
+#define DP_QUOT	KC_Z
+#define DP_Q	KC_X
+#define DP_J	KC_C
+#define DP_K	KC_V
+#define DP_X	KC_B
+#define DP_B	KC_N
+#define DP_M	KC_M
+#define DP_W	KC_COMM
+#define DP_V	KC_DOT
+#define DP_Z	KC_SLSH
+
+// Shifted characters
+#define DP_TILD	LSFT(DP_DLR)
+#define DP_PERC	LSFT(DP_AMPR)
+#define DP_7	LSFT(DP_LBRC)
+#define DP_5	LSFT(DP_LCBR)
+#define DP_3	LSFT(DP_RCBR)
+#define DP_1	LSFT(DP_LPRN)
+#define DP_9	LSFT(DP_EQL)
+#define DP_0	LSFT(DP_ASTR)
+#define DP_2	LSFT(DP_RPRN)
+#define DP_4	LSFT(DP_PLUS)
+#define DP_6	LSFT(DP_RBRC)
+#define DP_8	LSFT(DP_EXLM)
+#define DP_GRV	LSFT(DP_HASH)
+
+#define DP_COLN	LSFT(DP_SCLN)
+#define DP_LABK	LSFT(DP_COMM)
+#define DP_RABK	LSFT(DP_DOT)
+#define DP_QUES	LSFT(DP_SLSH)
+#define DP_CIRC	LSFT(DP_AT)
+#define DP_PIPE	LSFT(DP_BSLS)
+#define DP_UNDS	LSFT(DP_MINS)
+#define DP_DQUO	LSFT(DP_QUOT)
+
+#endif
diff --git a/quantum/keymap_extras/keymap_jp.h b/quantum/keymap_extras/keymap_jp.h
new file mode 100644
index 0000000000..e81b5952e0
--- /dev/null
+++ b/quantum/keymap_extras/keymap_jp.h
@@ -0,0 +1,62 @@
+/* JP106-layout (Japanese Standard)
+ *
+ * For more information, see
+ * http://www2d.biglobe.ne.jp/~msyk/keyboard/layout/usbkeycode.html
+ * note: This website is written in Japanese.
+ */
+
+
+#ifndef KEYMAP_JP_H
+#define KEYMAP_JP_H
+
+
+#include "keymap.h"
+
+
+#define JP_ZHTG KC_GRV  // hankaku/zenkaku|kanzi
+#define JP_YEN  KC_INT3 // yen, |
+#define JP_CIRC KC_EQL  // ^, ~
+#define JP_AT   KC_LBRC // @, `
+#define JP_LBRC KC_RBRC // [, {
+#define JP_COLN KC_QUOT // :, *
+#define JP_RBRC KC_NUHS // ], }
+#define JP_BSLS KC_INT1 // \, _
+#define JP_MHEN KC_INT5 // muhenkan
+#define JP_HENK KC_INT4 // henkan
+#define JP_KANA KC_INT2 // katakana/hiragana|ro-mazi
+
+
+//Aliases for shifted symbols
+#define JP_DQT  LSFT(KC_2)    // "
+#define JP_AMPR LSFT(KC_6)    // &
+#define JP_QUOT LSFT(KC_7)    // '
+#define JP_LPRN LSFT(KC_8)    // (
+#define JP_RPRN LSFT(KC_9)    // )
+#define JP_EQL  LSFT(KC_MINS) // =
+#define JP_TILD LSFT(JP_CIRC) // ~
+#define JP_PIPE LSFT(JP_YEN)  // |
+#define JP_GRV  LSFT(JP_AT)   // `
+#define JP_LCBR LSFT(JP_LBRC) // {
+#define JP_PLUS LSFT(KC_SCLN) // +
+#define JP_ASTR LSFT(JP_COLN) // *
+#define JP_RCBR LSFT(JP_RBRC) // }
+#define JP_UNDS LSFT(JP_BSLS) // _
+
+
+// These symbols are correspond to US101-layout.
+#define JP_MINS KC_MINS // -
+#define JP_SCLN KC_SCLN // ;
+#define JP_COMM KC_COMM // ,
+#define JP_DOT  KC_DOT  // .
+#define JP_SLSH KC_SLSH // /
+// shifted
+#define JP_EXLM KC_EXLM // !
+#define JP_HASH KC_HASH // #
+#define JP_DLR  KC_DLR  // $
+#define JP_PERC KC_PERC // %
+#define JP_LT   KC_LT   // <
+#define JP_GT   KC_GT   // >
+#define JP_QUES KC_QUES // ?
+
+
+#endif
diff --git a/quantum/keymap_extras/keymap_nordic.h b/quantum/keymap_extras/keymap_nordic.h
index da5c829757..9b0ef35ca9 100644
--- a/quantum/keymap_extras/keymap_nordic.h
+++ b/quantum/keymap_extras/keymap_nordic.h
@@ -13,7 +13,7 @@
 #define NO_ACUT	KC_EQL
 
 #define NO_AM	KC_LBRC
-#define NO_QUOT	KC_RBRC
+#define NO_QUOT	KC_RBRC // this is the "umlaut" char on Nordic keyboards, Apple layout
 #define NO_AE	KC_SCLN
 #define NO_OSLH	KC_QUOT
 #define	NO_APOS	KC_NUHS
diff --git a/quantum/light_ws2812.c b/quantum/light_ws2812.c
index 401845e855..a883b13884 100755
--- a/quantum/light_ws2812.c
+++ b/quantum/light_ws2812.c
@@ -16,14 +16,128 @@
 #include <util/delay.h>
 #include "debug.h"
 
+#ifdef RGBW_BB_TWI
+
+// Port for the I2C
+#define I2C_DDR DDRD
+#define I2C_PIN PIND
+#define I2C_PORT PORTD
+
+// Pins to be used in the bit banging
+#define I2C_CLK 0
+#define I2C_DAT 1
+
+#define I2C_DATA_HI()\
+I2C_DDR &= ~ (1 << I2C_DAT);\
+I2C_PORT |= (1 << I2C_DAT);
+#define I2C_DATA_LO()\
+I2C_DDR |= (1 << I2C_DAT);\
+I2C_PORT &= ~ (1 << I2C_DAT);
+
+#define I2C_CLOCK_HI()\
+I2C_DDR &= ~ (1 << I2C_CLK);\
+I2C_PORT |= (1 << I2C_CLK);
+#define I2C_CLOCK_LO()\
+I2C_DDR |= (1 << I2C_CLK);\
+I2C_PORT &= ~ (1 << I2C_CLK);
+
+#define I2C_DELAY 1
+
+void I2C_WriteBit(unsigned char c)
+{
+    if (c > 0)
+    {
+        I2C_DATA_HI();
+    }
+    else
+    {
+        I2C_DATA_LO();
+    }
+
+    I2C_CLOCK_HI();
+    _delay_us(I2C_DELAY);
+
+    I2C_CLOCK_LO();
+    _delay_us(I2C_DELAY);
+
+    if (c > 0)
+    {
+        I2C_DATA_LO();
+    }
+
+    _delay_us(I2C_DELAY);
+}
+
+// Inits bitbanging port, must be called before using the functions below
+//
+void I2C_Init()
+{
+    I2C_PORT &= ~ ((1 << I2C_DAT) | (1 << I2C_CLK));
+
+    I2C_CLOCK_HI();
+    I2C_DATA_HI();
+
+    _delay_us(I2C_DELAY);
+}
+
+// Send a START Condition
+//
+void I2C_Start()
+{
+    // set both to high at the same time
+    I2C_DDR &= ~ ((1 << I2C_DAT) | (1 << I2C_CLK));
+    _delay_us(I2C_DELAY);
+
+    I2C_DATA_LO();
+    _delay_us(I2C_DELAY);
+
+    I2C_CLOCK_LO();
+    _delay_us(I2C_DELAY);
+}
+
+// Send a STOP Condition
+//
+void I2C_Stop()
+{
+    I2C_CLOCK_HI();
+    _delay_us(I2C_DELAY);
+
+    I2C_DATA_HI();
+    _delay_us(I2C_DELAY);
+}
+
+// write a byte to the I2C slave device
+//
+unsigned char I2C_Write(unsigned char c)
+{
+    for (char i = 0; i < 8; i++)
+    {
+        I2C_WriteBit(c & 128);
+
+        c <<= 1;
+    }
+
+    
+    I2C_WriteBit(0);
+    _delay_us(I2C_DELAY);
+    _delay_us(I2C_DELAY);
+  
+    // _delay_us(I2C_DELAY);
+    //return I2C_ReadBit();
+    return 0;
+}
+
+
+#endif
+
 // Setleds for standard RGB
-void inline ws2812_setleds(struct cRGB *ledarray, uint16_t leds)
+void inline ws2812_setleds(LED_TYPE *ledarray, uint16_t leds)
 {
    // ws2812_setleds_pin(ledarray,leds, _BV(ws2812_pin));
    ws2812_setleds_pin(ledarray,leds, _BV(RGB_DI_PIN & 0xF));
 }
 
-void inline ws2812_setleds_pin(struct cRGB *ledarray, uint16_t leds, uint8_t pinmask)
+void inline ws2812_setleds_pin(LED_TYPE *ledarray, uint16_t leds, uint8_t pinmask)
 {
   // ws2812_DDRREG |= pinmask; // Enable DDR
   // new universal format (DDR)
@@ -34,14 +148,41 @@ void inline ws2812_setleds_pin(struct cRGB *ledarray, uint16_t leds, uint8_t pin
 }
 
 // Setleds for SK6812RGBW
-void inline ws2812_setleds_rgbw(struct cRGBW *ledarray, uint16_t leds)
+void inline ws2812_setleds_rgbw(LED_TYPE *ledarray, uint16_t leds)
 {
+
+  #ifdef RGBW_BB_TWI
+    uint8_t sreg_prev, twcr_prev;
+    sreg_prev=SREG;
+    twcr_prev=TWCR;
+    cli();
+    TWCR &= ~(1<<TWEN);
+    I2C_Init();
+    I2C_Start();
+    I2C_Write(0x84);
+    uint16_t datlen = leds<<2;
+    uint8_t curbyte;
+    uint8_t * data = (uint8_t*)ledarray;
+    while (datlen--) {
+      curbyte=*data++;
+      I2C_Write(curbyte);
+    }
+    I2C_Stop();
+    SREG=sreg_prev;
+    TWCR=twcr_prev;
+  #endif
+
+
   // ws2812_DDRREG |= _BV(ws2812_pin); // Enable DDR
   // new universal format (DDR)
   _SFR_IO8((RGB_DI_PIN >> 4) + 1) |= _BV(RGB_DI_PIN & 0xF);
 
   ws2812_sendarray_mask((uint8_t*)ledarray,leds<<2,_BV(RGB_DI_PIN & 0xF));
-  _delay_us(80);
+
+
+  #ifndef RGBW_BB_TWI
+    _delay_us(80);
+  #endif
 }
 
 void ws2812_sendarray(uint8_t *data,uint16_t datlen)
@@ -123,7 +264,7 @@ void inline ws2812_sendarray_mask(uint8_t *data,uint16_t datlen,uint8_t maskhi)
   cli();
 
   while (datlen--) {
-    curbyte=*data++;
+    curbyte=(*data++);
 
     asm volatile(
     "       ldi   %0,8  \n\t"
diff --git a/quantum/light_ws2812.h b/quantum/light_ws2812.h
index 54eef22d9e..2f78c20fc1 100755
--- a/quantum/light_ws2812.h
+++ b/quantum/light_ws2812.h
@@ -16,6 +16,14 @@
 #include <avr/io.h>
 #include <avr/interrupt.h>
 //#include "ws2812_config.h"
+//#include "i2cmaster.h"
+
+#ifdef RGBW
+  #define LED_TYPE struct cRGBW
+#else
+  #define LED_TYPE struct cRGB
+#endif
+
 
 /*
  *  Structure of the LED array
@@ -42,9 +50,9 @@ struct cRGBW { uint8_t g; uint8_t r; uint8_t b; uint8_t w;};
  *         - Wait 50�s to reset the LEDs
  */
 
-void ws2812_setleds     (struct cRGB  *ledarray, uint16_t number_of_leds);
-void ws2812_setleds_pin (struct cRGB  *ledarray, uint16_t number_of_leds,uint8_t pinmask);
-void ws2812_setleds_rgbw(struct cRGBW *ledarray, uint16_t number_of_leds);
+void ws2812_setleds     (LED_TYPE *ledarray, uint16_t number_of_leds);
+void ws2812_setleds_pin (LED_TYPE *ledarray, uint16_t number_of_leds,uint8_t pinmask);
+void ws2812_setleds_rgbw(LED_TYPE *ledarray, uint16_t number_of_leds);
 
 /*
  * Old interface / Internal functions
diff --git a/quantum/matrix.c b/quantum/matrix.c
index 3174e07390..07eb87bc36 100644
--- a/quantum/matrix.c
+++ b/quantum/matrix.c
@@ -25,37 +25,65 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "debug.h"
 #include "util.h"
 #include "matrix.h"
+#include "timer.h"
+
 
 /* Set 0 if debouncing isn't needed */
 
 #ifndef DEBOUNCING_DELAY
 #   define DEBOUNCING_DELAY 5
 #endif
-static uint8_t debouncing = DEBOUNCING_DELAY;
+
+#if (DEBOUNCING_DELAY > 0)
+    static uint16_t debouncing_time;
+    static bool debouncing = false;
+#endif
+
+#if (MATRIX_COLS <= 8)
+#    define print_matrix_header()  print("\nr/c 01234567\n")
+#    define print_matrix_row(row)  print_bin_reverse8(matrix_get_row(row))
+#    define matrix_bitpop(i)       bitpop(matrix[i])
+#    define ROW_SHIFTER ((uint8_t)1)
+#elif (MATRIX_COLS <= 16)
+#    define print_matrix_header()  print("\nr/c 0123456789ABCDEF\n")
+#    define print_matrix_row(row)  print_bin_reverse16(matrix_get_row(row))
+#    define matrix_bitpop(i)       bitpop16(matrix[i])
+#    define ROW_SHIFTER ((uint16_t)1)
+#elif (MATRIX_COLS <= 32)
+#    define print_matrix_header()  print("\nr/c 0123456789ABCDEF0123456789ABCDEF\n")
+#    define print_matrix_row(row)  print_bin_reverse32(matrix_get_row(row))
+#    define matrix_bitpop(i)       bitpop32(matrix[i])
+#    define ROW_SHIFTER  ((uint32_t)1)
+#endif
+
+#ifdef MATRIX_MASKED
+    extern const matrix_row_t matrix_mask[];
+#endif
 
 static const uint8_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
 static const uint8_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
 
 /* matrix state(1:on, 0:off) */
 static matrix_row_t matrix[MATRIX_ROWS];
+
+static matrix_row_t matrix_raw[MATRIX_ROWS];
 static matrix_row_t matrix_debouncing[MATRIX_ROWS];
 
-#if DIODE_DIRECTION == ROW2COL
-    static matrix_row_t matrix_reversed[MATRIX_COLS];
-    static matrix_row_t matrix_reversed_debouncing[MATRIX_COLS];
-#endif
 
-#if MATRIX_COLS > 16
-    #define SHIFTER 1UL
-#else
-    #define SHIFTER 1
+#if (DIODE_DIRECTION == COL2ROW)
+    static void init_cols(void);
+    static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row);
+    static void unselect_rows(void);
+    static void select_row(uint8_t row);
+    static void unselect_row(uint8_t row);
+#else // ROW2COL
+    static void init_rows(void);
+    static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col);
+    static void unselect_cols(void);
+    static void unselect_col(uint8_t col);
+    static void select_col(uint8_t col);
 #endif
 
-static matrix_row_t read_cols(void);
-static void init_cols(void);
-static void unselect_rows(void);
-static void select_row(uint8_t row);
-
 __attribute__ ((weak))
 void matrix_init_quantum(void) {
     matrix_init_kb();
@@ -95,7 +123,7 @@ uint8_t matrix_cols(void) {
 }
 
 // void matrix_power_up(void) {
-// #if DIODE_DIRECTION == COL2ROW
+// #if (DIODE_DIRECTION == COL2ROW)
 //     for (int8_t r = MATRIX_ROWS - 1; r >= 0; --r) {
 //         /* DDRxn */
 //         _SFR_IO8((row_pins[r] >> 4) + 1) |= _BV(row_pins[r] & 0xF);
@@ -119,19 +147,26 @@ uint8_t matrix_cols(void) {
 // }
 
 void matrix_init(void) {
+
     // To use PORTF disable JTAG with writing JTD bit twice within four cycles.
-    #ifdef __AVR_ATmega32U4__
+    #if  (defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__) || defined(__AVR_ATmega32U4__))
         MCUCR |= _BV(JTD);
         MCUCR |= _BV(JTD);
     #endif
 
     // initialize row and col
+#if (DIODE_DIRECTION == COL2ROW)
     unselect_rows();
     init_cols();
+#else // ROW2COL
+    unselect_cols();
+    init_rows();
+#endif
 
     // initialize matrix state: all keys off
     for (uint8_t i=0; i < MATRIX_ROWS; i++) {
         matrix[i] = 0;
+        matrix_raw[i] = 0;
         matrix_debouncing[i] = 0;
     }
 
@@ -141,71 +176,60 @@ void matrix_init(void) {
 uint8_t matrix_scan(void)
 {
 
-#if DIODE_DIRECTION == COL2ROW
-    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
-        select_row(i);
-        wait_us(30);  // without this wait read unstable value.
-        matrix_row_t cols = read_cols();
-        if (matrix_debouncing[i] != cols) {
-            matrix_debouncing[i] = cols;
-            if (debouncing) {
-                debug("bounce!: "); debug_hex(debouncing); debug("\n");
-            }
-            debouncing = DEBOUNCING_DELAY;
-        }
-        unselect_rows();
-    }
+#if (DIODE_DIRECTION == COL2ROW)
 
-    if (debouncing) {
-        if (--debouncing) {
-            wait_ms(1);
-        } else {
-            for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
-                matrix[i] = matrix_debouncing[i];
+    // Set row, read cols
+    for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
+#       if (DEBOUNCING_DELAY > 0)
+            bool matrix_changed = read_cols_on_row(matrix_debouncing, current_row);
+
+            if (matrix_changed) {
+                debouncing = true;
+                debouncing_time = timer_read();
             }
-        }
+
+#       else
+            read_cols_on_row(matrix, current_row);
+#       endif
+
     }
-#else
-    for (uint8_t i = 0; i < MATRIX_COLS; i++) {
-        select_row(i);
-        wait_us(30);  // without this wait read unstable value.
-        matrix_row_t rows = read_cols();
-        if (matrix_reversed_debouncing[i] != rows) {
-            matrix_reversed_debouncing[i] = rows;
-            if (debouncing) {
-                debug("bounce!: "); debug_hex(debouncing); debug("\n");
+
+#else // ROW2COL
+
+    // Set col, read rows
+    for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
+#       if (DEBOUNCING_DELAY > 0)
+            bool matrix_changed = read_rows_on_col(matrix_debouncing, current_col);
+            if (matrix_changed) {
+                debouncing = true;
+                debouncing_time = timer_read();
             }
-            debouncing = DEBOUNCING_DELAY;
-        }
-        unselect_rows();
+#       else
+             read_rows_on_col(matrix, current_col);
+#       endif
+
     }
 
-    if (debouncing) {
-        if (--debouncing) {
-            wait_ms(1);
-        } else {
-            for (uint8_t i = 0; i < MATRIX_COLS; i++) {
-                matrix_reversed[i] = matrix_reversed_debouncing[i];
+#endif
+
+#   if (DEBOUNCING_DELAY > 0)
+        if (debouncing && (timer_elapsed(debouncing_time) > DEBOUNCING_DELAY)) {
+            for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+                matrix[i] = matrix_debouncing[i];
             }
+            debouncing = false;
         }
-    }
-    for (uint8_t y = 0; y < MATRIX_ROWS; y++) {
-        matrix_row_t row = 0;
-        for (uint8_t x = 0; x < MATRIX_COLS; x++) {
-            row |= ((matrix_reversed[x] & (1<<y)) >> y) << x;
-        }
-        matrix[y] = row;
-    }
-#endif
+#   endif
 
     matrix_scan_quantum();
-
     return 1;
 }
 
 bool matrix_is_modified(void)
 {
+#if (DEBOUNCING_DELAY > 0)
     if (debouncing) return false;
+#endif
     return true;
 }
 
@@ -218,15 +242,22 @@ bool matrix_is_on(uint8_t row, uint8_t col)
 inline
 matrix_row_t matrix_get_row(uint8_t row)
 {
+    // Matrix mask lets you disable switches in the returned matrix data. For example, if you have a
+    // switch blocker installed and the switch is always pressed.
+#ifdef MATRIX_MASKED
+    return matrix[row] & matrix_mask[row];
+#else
     return matrix[row];
+#endif
 }
 
 void matrix_print(void)
 {
-    print("\nr/c 0123456789ABCDEF\n");
+    print_matrix_header();
+
     for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
         phex(row); print(": ");
-        pbin_reverse16(matrix_get_row(row));
+        print_matrix_row(row);
         print("\n");
     }
 }
@@ -235,63 +266,148 @@ uint8_t matrix_key_count(void)
 {
     uint8_t count = 0;
     for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
-        count += bitpop16(matrix[i]);
+        count += matrix_bitpop(i);
     }
     return count;
 }
 
+
+
+#if (DIODE_DIRECTION == COL2ROW)
+
 static void init_cols(void)
 {
-#if DIODE_DIRECTION == COL2ROW
-    for(int x = 0; x < MATRIX_COLS; x++) {
-        int pin = col_pins[x];
-#else
-    for(int x = 0; x < MATRIX_ROWS; x++) {
-        int pin = row_pins[x];
-#endif
-        _SFR_IO8((pin >> 4) + 1) &=  ~_BV(pin & 0xF);
-        _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF);
+    for(uint8_t x = 0; x < MATRIX_COLS; x++) {
+        uint8_t pin = col_pins[x];
+        _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
+        _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // HI
     }
 }
 
-static matrix_row_t read_cols(void)
+static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
 {
-    matrix_row_t result = 0;
+    // Store last value of row prior to reading
+    matrix_row_t last_row_value = current_matrix[current_row];
 
-#if DIODE_DIRECTION == COL2ROW
-    for(int x = 0; x < MATRIX_COLS; x++) {     
-        int pin = col_pins[x];
-#else
-    for(int x = 0; x < MATRIX_ROWS; x++) {
-        int pin = row_pins[x];
-#endif
-        result |= (_SFR_IO8(pin >> 4) & _BV(pin & 0xF)) ? 0 : (SHIFTER << x);
+    // Clear data in matrix row
+    current_matrix[current_row] = 0;
+
+    // Select row and wait for row selecton to stabilize
+    select_row(current_row);
+    wait_us(30);
+
+    // For each col...
+    for(uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
+
+        // Select the col pin to read (active low)
+        uint8_t pin = col_pins[col_index];
+        uint8_t pin_state = (_SFR_IO8(pin >> 4) & _BV(pin & 0xF));
+
+        // Populate the matrix row with the state of the col pin
+        current_matrix[current_row] |=  pin_state ? 0 : (ROW_SHIFTER << col_index);
     }
-    return result;
+
+    // Unselect row
+    unselect_row(current_row);
+
+    return (last_row_value != current_matrix[current_row]);
+}
+
+static void select_row(uint8_t row)
+{
+    uint8_t pin = row_pins[row];
+    _SFR_IO8((pin >> 4) + 1) |=  _BV(pin & 0xF); // OUT
+    _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
+}
+
+static void unselect_row(uint8_t row)
+{
+    uint8_t pin = row_pins[row];
+    _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
+    _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // HI
 }
 
 static void unselect_rows(void)
 {
-#if DIODE_DIRECTION == COL2ROW
-    for(int x = 0; x < MATRIX_ROWS; x++) { 
-        int pin = row_pins[x];
-#else
-    for(int x = 0; x < MATRIX_COLS; x++) { 
-        int pin = col_pins[x];
-#endif
-        _SFR_IO8((pin >> 4) + 1) &=  ~_BV(pin & 0xF);
-        _SFR_IO8((pin >> 4) + 2) |= _BV(pin & 0xF);
+    for(uint8_t x = 0; x < MATRIX_ROWS; x++) {
+        uint8_t pin = row_pins[x];
+        _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
+        _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // HI
     }
 }
 
-static void select_row(uint8_t row)
+#else // ROW2COL
+
+static void init_rows(void)
 {
+    for(uint8_t x = 0; x < MATRIX_ROWS; x++) {
+        uint8_t pin = row_pins[x];
+        _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
+        _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // HI
+    }
+}
 
-#if DIODE_DIRECTION == COL2ROW
-    int pin = row_pins[row];
-#else
-    int pin = col_pins[row];
-#endif
-    _SFR_IO8((pin >> 4) + 1) |=  _BV(pin & 0xF);
-    _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF);
+static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)
+{
+    bool matrix_changed = false;
+
+    // Select col and wait for col selecton to stabilize
+    select_col(current_col);
+    wait_us(30);
+
+    // For each row...
+    for(uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++)
+    {
+
+        // Store last value of row prior to reading
+        matrix_row_t last_row_value = current_matrix[row_index];
+
+        // Check row pin state
+        if ((_SFR_IO8(row_pins[row_index] >> 4) & _BV(row_pins[row_index] & 0xF)) == 0)
+        {
+            // Pin LO, set col bit
+            current_matrix[row_index] |= (ROW_SHIFTER << current_col);
+        }
+        else
+        {
+            // Pin HI, clear col bit
+            current_matrix[row_index] &= ~(ROW_SHIFTER << current_col);
+        }
+
+        // Determine if the matrix changed state
+        if ((last_row_value != current_matrix[row_index]) && !(matrix_changed))
+        {
+            matrix_changed = true;
+        }
+    }
+
+    // Unselect col
+    unselect_col(current_col);
+
+    return matrix_changed;
 }
+
+static void select_col(uint8_t col)
+{
+    uint8_t pin = col_pins[col];
+    _SFR_IO8((pin >> 4) + 1) |=  _BV(pin & 0xF); // OUT
+    _SFR_IO8((pin >> 4) + 2) &= ~_BV(pin & 0xF); // LOW
+}
+
+static void unselect_col(uint8_t col)
+{
+    uint8_t pin = col_pins[col];
+    _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
+    _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // HI
+}
+
+static void unselect_cols(void)
+{
+    for(uint8_t x = 0; x < MATRIX_COLS; x++) {
+        uint8_t pin = col_pins[x];
+        _SFR_IO8((pin >> 4) + 1) &= ~_BV(pin & 0xF); // IN
+        _SFR_IO8((pin >> 4) + 2) |=  _BV(pin & 0xF); // HI
+    }
+}
+
+#endif
diff --git a/quantum/pincontrol.h b/quantum/pincontrol.h
new file mode 100644
index 0000000000..36ce29ef22
--- /dev/null
+++ b/quantum/pincontrol.h
@@ -0,0 +1,37 @@
+#pragma once
+// Some helpers for controlling gpio pins
+#include <avr/io.h>
+
+enum {
+  PinDirectionInput = 0,
+  PinDirectionOutput = 1,
+  PinLevelHigh = 1,
+  PinLevelLow = 0,
+};
+
+// ex: pinMode(B0, PinDirectionOutput);
+static inline void pinMode(uint8_t pin, int mode) {
+  uint8_t bv = _BV(pin & 0xf);
+  if (mode == PinDirectionOutput) {
+    _SFR_IO8((pin >> 4) + 1) |= bv;
+  } else {
+    _SFR_IO8((pin >> 4) + 1) &= ~bv;
+    _SFR_IO8((pin >> 4) + 2) &= ~bv;
+  }
+}
+
+// ex: digitalWrite(B0, PinLevelHigh);
+static inline void digitalWrite(uint8_t pin, int mode) {
+  uint8_t bv = _BV(pin & 0xf);
+  if (mode == PinLevelHigh) {
+    _SFR_IO8((pin >> 4) + 2) |= bv;
+  } else {
+    _SFR_IO8((pin >> 4) + 2) &= ~bv;
+  }
+}
+
+// Return true if the pin is HIGH
+// digitalRead(B0)
+static inline bool digitalRead(uint8_t pin) {
+  return _SFR_IO8(pin >> 4) & _BV(pin & 0xf);
+}
diff --git a/quantum/process_keycode/process_music.c b/quantum/process_keycode/process_music.c
index 2d52e47a72..ca68bef6c8 100644
--- a/quantum/process_keycode/process_music.c
+++ b/quantum/process_keycode/process_music.c
@@ -1,8 +1,8 @@
 #include "process_music.h"
 
 bool music_activated = false;
-uint8_t starting_note = 0x0C;
-int offset = 7;
+uint8_t music_starting_note = 0x0C;
+int music_offset = 7;
 
 // music sequencer
 static bool music_sequence_recording = false;
@@ -115,7 +115,16 @@ bool process_music(uint16_t keycode, keyrecord_t *record) {
         return false;
       }
 
-      float freq = ((float)220.0)*pow(2.0, -5.0)*pow(2.0,(starting_note + SCALE[record->event.key.col + offset])/12.0+(MATRIX_ROWS - record->event.key.row));
+      #ifdef MUSIC_MODE_CHROMATIC
+      float freq = ((float)220.0)*pow(2.0, -5.0)*pow(2.0,(music_starting_note + record->event.key.col + music_offset)/12.0+(MATRIX_ROWS - record->event.key.row));
+      #elif defined(MUSIC_MODE_GUITAR)
+      float freq = ((float)220.0)*pow(2.0, -5.0)*pow(2.0,(music_starting_note + record->event.key.col + music_offset)/12.0+(float)(MATRIX_ROWS - record->event.key.row + 7)*5.0/12);
+      #elif defined(MUSIC_MODE_VIOLIN)
+      float freq = ((float)220.0)*pow(2.0, -5.0)*pow(2.0,(music_starting_note + record->event.key.col + music_offset)/12.0+(float)(MATRIX_ROWS - record->event.key.row + 5)*7.0/12);
+      #else
+      float freq = ((float)220.0)*pow(2.0, -5.0)*pow(2.0,(music_starting_note + SCALE[record->event.key.col + music_offset])/12.0+(MATRIX_ROWS - record->event.key.row));
+      #endif
+
       if (record->event.pressed) {
         play_note(freq, 0xF);
         if (music_sequence_recording) {
diff --git a/quantum/process_keycode/process_printer.c b/quantum/process_keycode/process_printer.c
new file mode 100644
index 0000000000..2e11dd366c
--- /dev/null
+++ b/quantum/process_keycode/process_printer.c
@@ -0,0 +1,254 @@
+#include "process_printer.h"
+#include "action_util.h"
+
+bool printing_enabled = false;
+uint8_t character_shift = 0;
+
+void enabled_printing() {
+	printing_enabled = true;
+	serial_init();
+}
+
+void disable_printing() {
+	printing_enabled = false;
+}
+
+uint8_t shifted_numbers[10] = {0x21, 0x40, 0x23, 0x24, 0x25, 0x5E, 0x26, 0x2A, 0x28, 0x29};
+
+// uint8_t keycode_to_ascii[0xFF][2];
+
+// keycode_to_ascii[KC_MINS] = {0x2D, 0x5F};
+
+void print_char(char c) {
+	USB_Disable();
+	serial_send(c);
+	USB_Init();
+}
+
+void print_box_string(uint8_t text[]) {
+	uint8_t len = strlen(text);
+	uint8_t out[len * 3 + 8];
+	out[0] = 0xDA;
+	for (uint8_t i = 0; i < len; i++) {
+		out[i+1] = 0xC4;
+	}
+	out[len + 1] = 0xBF;
+	out[len + 2] = '\n';
+
+	out[len + 3] = 0xB3;
+	for (uint8_t i = 0; i < len; i++) {
+		out[len + 4 + i] = text[i];
+	}
+	out[len * 2 + 4] = 0xB3;
+	out[len * 2 + 5] = '\n';
+
+
+	out[len * 2 + 6] = 0xC0;
+	for (uint8_t i = 0; i < len; i++) {
+		out[len * 2 + 7 + i] = 0xC4;
+	}
+	out[len * 3 + 7] = 0xD9;
+	out[len * 3 + 8] = '\n';
+
+	print_string(out); 
+}
+
+void print_string(char c[]) {
+	for(uint8_t i = 0; i < strlen(c); i++)
+		print_char(c[i]);
+}
+
+bool process_printer(uint16_t keycode, keyrecord_t *record) {
+	if (keycode == PRINT_ON) {
+		enabled_printing();
+		return false;
+	}
+	if (keycode == PRINT_OFF) {
+		disable_printing();
+		return false;
+	}
+
+	if (printing_enabled) {
+		switch(keycode) {
+			case KC_EXLM ... KC_RPRN:
+			case KC_UNDS:
+			case KC_PLUS:
+			case KC_LCBR:
+			case KC_RCBR:
+			case KC_PIPE:
+			case KC_TILD:
+				keycode &= 0xFF;
+			case KC_LSFT:
+			case KC_RSFT:
+				if (record->event.pressed) {
+					character_shift++;
+				} else {
+					character_shift--;
+				}
+				return false;
+			break;
+		}
+
+		switch(keycode) {
+			case KC_F1:
+				if (record->event.pressed) {
+					print_box_string("This is a line of text!");
+				}
+				return false;
+			case KC_ESC:
+				if (record->event.pressed) {
+					print_char(0x1B);
+				}
+				return false;
+			break;
+			case KC_SPC:
+				if (record->event.pressed) {
+					print_char(0x20);
+				}
+				return false;
+			break;
+			case KC_A ... KC_Z:
+				if (record->event.pressed) {
+					if (character_shift) {
+						print_char(0x41 + (keycode - KC_A));
+					} else {
+						print_char(0x61 + (keycode - KC_A));
+					}
+				}
+				return false;
+			break;
+			case KC_1 ... KC_0:
+				if (record->event.pressed) {
+					if (character_shift) {
+							print_char(shifted_numbers[keycode - KC_1]);
+					} else {
+							print_char(0x30 + ((keycode - KC_1 + 1) % 10));
+					}
+				}
+				return false;
+			break;
+			case KC_ENT:
+				if (record->event.pressed) {
+					if (character_shift) {
+						print_char(0x0C);
+					} else {
+						print_char(0x0A);
+					}
+				}
+				return false;
+			break;
+			case KC_BSPC:
+				if (record->event.pressed) {
+					if (character_shift) {
+						print_char(0x18);
+					} else {
+						print_char(0x1A);
+					}
+				}
+				return false;
+			break;
+			case KC_DOT:
+				if (record->event.pressed) {
+					if (character_shift) {
+						print_char(0x3E);
+					} else {
+						print_char(0x2E);
+					}
+				}
+				return false;
+			break;
+			case KC_COMM:
+				if (record->event.pressed) {
+					if (character_shift) {
+						print_char(0x3C);
+					} else {
+						print_char(0x2C);
+					}
+				}
+				return false;
+			break;
+			case KC_SLSH:
+				if (record->event.pressed) {
+					if (character_shift) {
+						print_char(0x3F);
+					} else {
+						print_char(0x2F);
+					}
+				}
+				return false;
+			break;
+			case KC_QUOT:
+				if (record->event.pressed) {
+					if (character_shift) {
+						print_char(0x22);
+					} else {
+						print_char(0x27);
+					}
+				}
+				return false;
+			break;
+			case KC_GRV:
+				if (record->event.pressed) {
+					if (character_shift) {
+						print_char(0x7E);
+					} else {
+						print_char(0x60);
+					}
+				}
+				return false;
+			break;
+			case KC_MINS:
+				if (record->event.pressed) {
+					if (character_shift) {
+						print_char(0x5F);
+					} else {
+						print_char(0x2D);
+					}
+				}
+				return false;
+			break;
+			case KC_EQL:
+				if (record->event.pressed) {
+					if (character_shift) {
+						print_char(0x2B);
+					} else {
+						print_char(0x3D);
+					}
+				}
+				return false;
+			break;
+			case KC_LBRC:
+				if (record->event.pressed) {
+					if (character_shift) {
+						print_char(0x7B);
+					} else {
+						print_char(0x5B);
+					}
+				}
+				return false;
+			break;
+			case KC_RBRC:
+				if (record->event.pressed) {
+					if (character_shift) {
+						print_char(0x7D);
+					} else {
+						print_char(0x5D);
+					}
+				}
+				return false;
+			break;
+			case KC_BSLS:
+				if (record->event.pressed) {
+					if (character_shift) {
+						print_char(0x7C);
+					} else {
+						print_char(0x5C);
+					}
+				}
+				return false;
+			break;
+		}
+	}
+	return true;
+
+}
\ No newline at end of file
diff --git a/quantum/process_keycode/process_printer.h b/quantum/process_keycode/process_printer.h
new file mode 100644
index 0000000000..fdd36d75a8
--- /dev/null
+++ b/quantum/process_keycode/process_printer.h
@@ -0,0 +1,8 @@
+#ifndef PROCESS_PRINTER_H
+#define PROCESS_PRINTER_H
+
+#include "quantum.h"
+
+#include "protocol/serial.h"
+
+#endif
\ No newline at end of file
diff --git a/quantum/process_keycode/process_printer_bb.c b/quantum/process_keycode/process_printer_bb.c
new file mode 100644
index 0000000000..1924d03774
--- /dev/null
+++ b/quantum/process_keycode/process_printer_bb.c
@@ -0,0 +1,260 @@
+#include "process_printer.h"
+#include "action_util.h"
+
+bool printing_enabled = false;
+uint8_t character_shift = 0;
+
+#define SERIAL_PIN_DDR DDRD
+#define SERIAL_PIN_PORT PORTD
+#define SERIAL_PIN_MASK _BV(PD3)
+#define SERIAL_DELAY 52
+
+inline static
+void serial_delay(void) {
+  _delay_us(SERIAL_DELAY);
+}
+
+inline static
+void serial_high(void) {
+  SERIAL_PIN_PORT |= SERIAL_PIN_MASK;
+}
+
+inline static
+void serial_low(void) {
+  SERIAL_PIN_PORT &= ~SERIAL_PIN_MASK;
+}
+
+inline static
+void serial_output(void) {
+  SERIAL_PIN_DDR |= SERIAL_PIN_MASK;
+}
+
+
+void enabled_printing() {
+	printing_enabled = true;
+	serial_output();
+	serial_high();
+}
+
+void disable_printing() {
+	printing_enabled = false;
+}
+
+uint8_t shifted_numbers[10] = {0x21, 0x40, 0x23, 0x24, 0x25, 0x5E, 0x26, 0x2A, 0x28, 0x29};
+
+// uint8_t keycode_to_ascii[0xFF][2];
+
+// keycode_to_ascii[KC_MINS] = {0x2D, 0x5F};
+
+void print_char(char c) {
+  uint8_t b = 8;
+  serial_output();
+  while( b-- ) {
+    if(c & (1 << b)) {
+      serial_high();
+    } else {
+      serial_low();
+    }
+    serial_delay();
+  }
+}
+
+void print_string(char c[]) {
+	for(uint8_t i = 0; i < strlen(c); i++)
+		print_char(c[i]);
+}
+
+bool process_printer(uint16_t keycode, keyrecord_t *record) {
+	if (keycode == PRINT_ON) {
+		enabled_printing();
+		return false;
+	}
+	if (keycode == PRINT_OFF) {
+		disable_printing();
+		return false;
+	}
+
+	if (printing_enabled) {
+		switch(keycode) {
+			case KC_EXLM ... KC_RPRN:
+			case KC_UNDS:
+			case KC_PLUS:
+			case KC_LCBR:
+			case KC_RCBR:
+			case KC_PIPE:
+			case KC_TILD:
+				keycode &= 0xFF;
+			case KC_LSFT:
+			case KC_RSFT:
+				if (record->event.pressed) {
+					character_shift++;
+				} else {
+					character_shift--;
+				}
+				return false;
+			break;
+		}
+
+		switch(keycode) {
+			case KC_F1:
+				if (record->event.pressed) {
+					print_string("This is a line of text!\n\n\n");
+				}
+				return false;
+			case KC_ESC:
+				if (record->event.pressed) {
+					print_char(0x1B);
+				}
+				return false;
+			break;
+			case KC_SPC:
+				if (record->event.pressed) {
+					print_char(0x20);
+				}
+				return false;
+			break;
+			case KC_A ... KC_Z:
+				if (record->event.pressed) {
+					if (character_shift) {
+						print_char(0x41 + (keycode - KC_A));
+					} else {
+						print_char(0x61 + (keycode - KC_A));
+					}
+				}
+				return false;
+			break;
+			case KC_1 ... KC_0:
+				if (record->event.pressed) {
+					if (character_shift) {
+							print_char(shifted_numbers[keycode - KC_1]);
+					} else {
+							print_char(0x30 + ((keycode - KC_1 + 1) % 10));
+					}
+				}
+				return false;
+			break;
+			case KC_ENT:
+				if (record->event.pressed) {
+					if (character_shift) {
+						print_char(0x0C);
+					} else {
+						print_char(0x0A);
+					}
+				}
+				return false;
+			break;
+			case KC_BSPC:
+				if (record->event.pressed) {
+					if (character_shift) {
+						print_char(0x18);
+					} else {
+						print_char(0x1A);
+					}
+				}
+				return false;
+			break;
+			case KC_DOT:
+				if (record->event.pressed) {
+					if (character_shift) {
+						print_char(0x3E);
+					} else {
+						print_char(0x2E);
+					}
+				}
+				return false;
+			break;
+			case KC_COMM:
+				if (record->event.pressed) {
+					if (character_shift) {
+						print_char(0x3C);
+					} else {
+						print_char(0x2C);
+					}
+				}
+				return false;
+			break;
+			case KC_SLSH:
+				if (record->event.pressed) {
+					if (character_shift) {
+						print_char(0x3F);
+					} else {
+						print_char(0x2F);
+					}
+				}
+				return false;
+			break;
+			case KC_QUOT:
+				if (record->event.pressed) {
+					if (character_shift) {
+						print_char(0x22);
+					} else {
+						print_char(0x27);
+					}
+				}
+				return false;
+			break;
+			case KC_GRV:
+				if (record->event.pressed) {
+					if (character_shift) {
+						print_char(0x7E);
+					} else {
+						print_char(0x60);
+					}
+				}
+				return false;
+			break;
+			case KC_MINS:
+				if (record->event.pressed) {
+					if (character_shift) {
+						print_char(0x5F);
+					} else {
+						print_char(0x2D);
+					}
+				}
+				return false;
+			break;
+			case KC_EQL:
+				if (record->event.pressed) {
+					if (character_shift) {
+						print_char(0x2B);
+					} else {
+						print_char(0x3D);
+					}
+				}
+				return false;
+			break;
+			case KC_LBRC:
+				if (record->event.pressed) {
+					if (character_shift) {
+						print_char(0x7B);
+					} else {
+						print_char(0x5B);
+					}
+				}
+				return false;
+			break;
+			case KC_RBRC:
+				if (record->event.pressed) {
+					if (character_shift) {
+						print_char(0x7D);
+					} else {
+						print_char(0x5D);
+					}
+				}
+				return false;
+			break;
+			case KC_BSLS:
+				if (record->event.pressed) {
+					if (character_shift) {
+						print_char(0x7C);
+					} else {
+						print_char(0x5C);
+					}
+				}
+				return false;
+			break;
+		}
+	}
+	return true;
+
+}
\ No newline at end of file
diff --git a/quantum/process_keycode/process_unicode.c b/quantum/process_keycode/process_unicode.c
index 6a30afe293..cd3a610b4d 100644
--- a/quantum/process_keycode/process_unicode.c
+++ b/quantum/process_keycode/process_unicode.c
@@ -42,6 +42,11 @@ void unicode_input_start (void) {
     register_code(KC_PPLS);
     unregister_code(KC_PPLS);
     break;
+  case UC_WINC:
+    register_code(KC_RALT);
+    unregister_code(KC_RALT);
+    register_code(KC_U);
+    unregister_code(KC_U);
   }
   wait_ms(UNICODE_TYPE_DELAY);
 }
@@ -78,6 +83,52 @@ bool process_unicode(uint16_t keycode, keyrecord_t *record) {
   return true;
 }
 
+#ifdef UNICODEMAP_ENABLE
+__attribute__((weak))
+const uint32_t PROGMEM unicode_map[] = {
+};
+
+void register_hex32(uint32_t hex) {
+  uint8_t onzerostart = 1;
+  for(int i = 7; i >= 0; i--) {
+    if (i <= 3) {
+      onzerostart = 0;
+    }
+    uint8_t digit = ((hex >> (i*4)) & 0xF);
+    if (digit == 0) {
+      if (onzerostart == 0) {
+        register_code(hex_to_keycode(digit));
+        unregister_code(hex_to_keycode(digit));
+      }
+    } else {
+      register_code(hex_to_keycode(digit));
+      unregister_code(hex_to_keycode(digit));
+      onzerostart = 0;
+    }
+  }
+}
+
+__attribute__((weak))
+void unicode_map_input_error() {}
+
+bool process_unicode_map(uint16_t keycode, keyrecord_t *record) {
+  if ((keycode & QK_UNICODE_MAP) == QK_UNICODE_MAP && record->event.pressed) {
+    const uint32_t* map = unicode_map;
+    uint16_t index = keycode & 0x7FF;
+    uint32_t code = pgm_read_dword_far(&map[index]);
+    if ((code > 0xFFFF && input_mode == UC_OSX) || (code > 0xFFFFF && input_mode == UC_LNX)) {
+      // when character is out of range supported by the OS
+      unicode_map_input_error();
+    } else {
+      unicode_input_start();
+      register_hex32(code);
+      unicode_input_finish();
+    }
+  }
+  return true;
+}
+#endif
+
 #ifdef UCIS_ENABLE
 qk_ucis_state_t qk_ucis_state;
 
diff --git a/quantum/process_keycode/process_unicode.h b/quantum/process_keycode/process_unicode.h
index 27f8072ee6..f17cfa6cf2 100644
--- a/quantum/process_keycode/process_unicode.h
+++ b/quantum/process_keycode/process_unicode.h
@@ -3,10 +3,11 @@
 
 #include "quantum.h"
 
-#define UC_OSX 0
-#define UC_LNX 1
-#define UC_WIN 2
-#define UC_BSD 3
+#define UC_OSX 0  // Mac OS X
+#define UC_LNX 1  // Linux
+#define UC_WIN 2  // Windows 'HexNumpad'
+#define UC_BSD 3  // BSD (not implemented)
+#define UC_WINC 4 // WinCompose https://github.com/samhocevar/wincompose
 
 #ifndef UNICODE_TYPE_DELAY
 #define UNICODE_TYPE_DELAY 10
@@ -20,6 +21,11 @@ void register_hex(uint16_t hex);
 
 bool process_unicode(uint16_t keycode, keyrecord_t *record);
 
+#ifdef UNICODEMAP_ENABLE
+void unicode_map_input_error(void);
+bool process_unicode_map(uint16_t keycode, keyrecord_t *record);
+#endif
+
 #ifdef UCIS_ENABLE
 #ifndef UCIS_MAX_SYMBOL_LENGTH
 #define UCIS_MAX_SYMBOL_LENGTH 32
diff --git a/quantum/quantum.c b/quantum/quantum.c
index a16bd5443c..63ffe2074e 100644
--- a/quantum/quantum.c
+++ b/quantum/quantum.c
@@ -1,5 +1,9 @@
 #include "quantum.h"
 
+#ifndef TAPPING_TERM
+#define TAPPING_TERM 200
+#endif
+
 static void do_code16 (uint16_t code, void (*f) (uint8_t)) {
   switch (code) {
   case QK_MODS ... QK_MODS_MAX:
@@ -17,6 +21,8 @@ static void do_code16 (uint16_t code, void (*f) (uint8_t)) {
   if (code & QK_LGUI)
     f(KC_LGUI);
 
+  if (code < QK_RMODS_MIN) return;
+
   if (code & QK_RCTL)
     f(KC_RCTL);
   if (code & QK_RSFT)
@@ -75,6 +81,7 @@ void reset_keyboard(void) {
 #endif
 
 static bool shift_interrupted[2] = {0, 0};
+static uint16_t scs_timer = 0;
 
 bool process_record_quantum(keyrecord_t *record) {
 
@@ -129,6 +136,12 @@ bool process_record_quantum(keyrecord_t *record) {
   #ifdef UCIS_ENABLE
     process_ucis(keycode, record) &&
   #endif
+  #ifdef PRINTING_ENABLE
+    process_printer(keycode, record) &&
+  #endif
+  #ifdef UNICODEMAP_ENABLE
+    process_unicode_map(keycode, record) &&
+  #endif
       true)) {
     return false;
   }
@@ -280,6 +293,7 @@ bool process_record_quantum(keyrecord_t *record) {
     case KC_LSPO: {
       if (record->event.pressed) {
         shift_interrupted[0] = false;
+        scs_timer = timer_read ();
         register_mods(MOD_BIT(KC_LSFT));
       }
       else {
@@ -289,7 +303,7 @@ bool process_record_quantum(keyrecord_t *record) {
             shift_interrupted[1] = true;
           }
         #endif
-        if (!shift_interrupted[0]) {
+        if (!shift_interrupted[0] && timer_elapsed(scs_timer) < TAPPING_TERM) {
           register_code(LSPO_KEY);
           unregister_code(LSPO_KEY);
         }
@@ -302,6 +316,7 @@ bool process_record_quantum(keyrecord_t *record) {
     case KC_RSPC: {
       if (record->event.pressed) {
         shift_interrupted[1] = false;
+        scs_timer = timer_read ();
         register_mods(MOD_BIT(KC_RSFT));
       }
       else {
@@ -311,7 +326,7 @@ bool process_record_quantum(keyrecord_t *record) {
             shift_interrupted[1] = true;
           }
         #endif
-        if (!shift_interrupted[1]) {
+        if (!shift_interrupted[1] && timer_elapsed(scs_timer) < TAPPING_TERM) {
           register_code(RSPC_KEY);
           unregister_code(RSPC_KEY);
         }
@@ -796,6 +811,51 @@ void backlight_set(uint8_t level)
 #endif // backlight
 
 
+// Functions for spitting out values
+//
+
+void send_dword(uint32_t number) { // this might not actually work
+    uint16_t word = (number >> 16);
+    send_word(word);
+    send_word(number & 0xFFFFUL);
+}
+
+void send_word(uint16_t number) {
+    uint8_t byte = number >> 8;
+    send_byte(byte);
+    send_byte(number & 0xFF);
+}
+
+void send_byte(uint8_t number) {
+    uint8_t nibble = number >> 4;
+    send_nibble(nibble);
+    send_nibble(number & 0xF);
+}
+
+void send_nibble(uint8_t number) {
+    switch (number) {
+        case 0:
+            register_code(KC_0);
+            unregister_code(KC_0);
+            break;
+        case 1 ... 9:
+            register_code(KC_1 + (number - 1));
+            unregister_code(KC_1 + (number - 1));
+            break;
+        case 0xA ... 0xF:
+            register_code(KC_A + (number - 0xA));
+            unregister_code(KC_A + (number - 0xA));
+            break;
+    }
+}
+
+void api_send_unicode(uint32_t unicode) {
+#ifdef API_ENABLE
+    uint8_t chunk[4];
+    dword_to_bytes(unicode, chunk);
+    MT_SEND_DATA(DT_UNICODE, chunk, 5);
+#endif
+}
 
 __attribute__ ((weak))
 void led_set_user(uint8_t usb_led) {
diff --git a/quantum/quantum.h b/quantum/quantum.h
index 0c60466495..e6adf974ab 100644
--- a/quantum/quantum.h
+++ b/quantum/quantum.h
@@ -59,6 +59,10 @@ extern uint32_t default_layer_state;
 
 #include "process_tap_dance.h"
 
+#ifdef PRINTING_ENABLE
+	#include "process_printer.h"
+#endif
+
 #define SEND_STRING(str) send_string(PSTR(str))
 void send_string(const char *str);
 
@@ -106,8 +110,15 @@ void breathing_speed_dec(uint8_t value);
 #endif
 
 #endif
+void send_dword(uint32_t number);
+void send_word(uint16_t number);
+void send_byte(uint8_t number);
+void send_nibble(uint8_t number);
+
 
 void led_set_user(uint8_t usb_led);
 void led_set_kb(uint8_t usb_led);
 
+void api_send_unicode(uint32_t unicode);
+
 #endif
diff --git a/quantum/quantum_keycodes.h b/quantum/quantum_keycodes.h
new file mode 100644
index 0000000000..5cd3c8e780
--- /dev/null
+++ b/quantum/quantum_keycodes.h
@@ -0,0 +1,313 @@
+
+#ifndef QUANTUM_KEYCODES_H
+#define QUANTUM_KEYCODES_H
+
+enum quantum_keycodes {
+    // Ranges used in shortucuts - not to be used directly
+    QK_TMK                = 0x0000,
+    QK_TMK_MAX            = 0x00FF,
+    QK_MODS               = 0x0100,
+    QK_LCTL               = 0x0100,
+    QK_LSFT               = 0x0200,
+    QK_LALT               = 0x0400,
+    QK_LGUI               = 0x0800,
+    QK_RMODS_MIN          = 0x1000,
+    QK_RCTL               = 0x1100,
+    QK_RSFT               = 0x1200,
+    QK_RALT               = 0x1400,
+    QK_RGUI               = 0x1800,
+    QK_MODS_MAX           = 0x1FFF,
+    QK_FUNCTION           = 0x2000,
+    QK_FUNCTION_MAX       = 0x2FFF,
+    QK_MACRO              = 0x3000,
+    QK_MACRO_MAX          = 0x3FFF,
+    QK_LAYER_TAP          = 0x4000,
+    QK_LAYER_TAP_MAX      = 0x4FFF,
+    QK_TO                 = 0x5000,
+    QK_TO_MAX             = 0x50FF,
+    QK_MOMENTARY          = 0x5100,
+    QK_MOMENTARY_MAX      = 0x51FF,
+    QK_DEF_LAYER          = 0x5200,
+    QK_DEF_LAYER_MAX      = 0x52FF,
+    QK_TOGGLE_LAYER       = 0x5300,
+    QK_TOGGLE_LAYER_MAX   = 0x53FF,
+    QK_ONE_SHOT_LAYER     = 0x5400,
+    QK_ONE_SHOT_LAYER_MAX = 0x54FF,
+    QK_ONE_SHOT_MOD       = 0x5500,
+    QK_ONE_SHOT_MOD_MAX   = 0x55FF,
+#ifndef DISABLE_CHORDING
+    QK_CHORDING           = 0x5600,
+    QK_CHORDING_MAX       = 0x56FF,
+#endif
+    QK_MOD_TAP            = 0x6000,
+    QK_MOD_TAP_MAX        = 0x6FFF,
+    QK_TAP_DANCE          = 0x7100,
+    QK_TAP_DANCE_MAX      = 0x71FF,
+#ifdef UNICODEMAP_ENABLE
+    QK_UNICODE_MAP        = 0x7800,
+    QK_UNICODE_MAP_MAX    = 0x7FFF,
+#endif
+#ifdef UNICODE_ENABLE
+    QK_UNICODE            = 0x8000,
+    QK_UNICODE_MAX        = 0xFFFF,
+#endif
+
+    // Loose keycodes - to be used directly
+
+    RESET = 0x7000,
+    DEBUG,
+    MAGIC_SWAP_CONTROL_CAPSLOCK,
+    MAGIC_CAPSLOCK_TO_CONTROL,
+    MAGIC_SWAP_LALT_LGUI,
+    MAGIC_SWAP_RALT_RGUI,
+    MAGIC_NO_GUI,
+    MAGIC_SWAP_GRAVE_ESC,
+    MAGIC_SWAP_BACKSLASH_BACKSPACE,
+    MAGIC_HOST_NKRO,
+    MAGIC_SWAP_ALT_GUI,
+    MAGIC_UNSWAP_CONTROL_CAPSLOCK,
+    MAGIC_UNCAPSLOCK_TO_CONTROL,
+    MAGIC_UNSWAP_LALT_LGUI,
+    MAGIC_UNSWAP_RALT_RGUI,
+    MAGIC_UNNO_GUI,
+    MAGIC_UNSWAP_GRAVE_ESC,
+    MAGIC_UNSWAP_BACKSLASH_BACKSPACE,
+    MAGIC_UNHOST_NKRO,
+    MAGIC_UNSWAP_ALT_GUI,
+    MAGIC_TOGGLE_NKRO,
+
+    // Leader key
+#ifndef DISABLE_LEADER
+    KC_LEAD,
+#endif
+
+    // Audio on/off/toggle
+    AU_ON,
+    AU_OFF,
+    AU_TOG,
+
+    // Music mode on/off/toggle
+    MU_ON,
+    MU_OFF,
+    MU_TOG,
+
+    // Music voice iterate
+    MUV_IN,
+    MUV_DE,
+
+    // Midi mode on/off
+    MIDI_ON,
+    MIDI_OFF,
+
+    // Backlight functionality
+    BL_0,
+    BL_1,
+    BL_2,
+    BL_3,
+    BL_4,
+    BL_5,
+    BL_6,
+    BL_7,
+    BL_8,
+    BL_9,
+    BL_10,
+    BL_11,
+    BL_12,
+    BL_13,
+    BL_14,
+    BL_15,
+    BL_DEC,
+    BL_INC,
+    BL_TOGG,
+    BL_STEP,
+
+    // RGB functionality
+    RGB_TOG,
+    RGB_MOD,
+    RGB_HUI,
+    RGB_HUD,
+    RGB_SAI,
+    RGB_SAD,
+    RGB_VAI,
+    RGB_VAD,
+
+    // Left shift, open paren
+    KC_LSPO,
+
+    // Right shift, close paren
+    KC_RSPC,
+
+    // Printing
+    PRINT_ON,
+    PRINT_OFF,
+
+    // always leave at the end
+    SAFE_RANGE
+};
+
+// Ability to use mods in layouts
+#define LCTL(kc) (kc | QK_LCTL)
+#define LSFT(kc) (kc | QK_LSFT)
+#define LALT(kc) (kc | QK_LALT)
+#define LGUI(kc) (kc | QK_LGUI)
+#define RCTL(kc) (kc | QK_RCTL)
+#define RSFT(kc) (kc | QK_RSFT)
+#define RALT(kc) (kc | QK_RALT)
+#define RGUI(kc) (kc | QK_RGUI)
+
+#define HYPR(kc) (kc | QK_LCTL | QK_LSFT | QK_LALT | QK_LGUI)
+#define MEH(kc)  (kc | QK_LCTL | QK_LSFT | QK_LALT)
+#define LCAG(kc) (kc | QK_LCTL | QK_LALT | QK_LGUI)
+#define ALTG(kc) (kc | QK_RCTL | QK_RALT)
+
+#define MOD_HYPR 0xf
+#define MOD_MEH 0x7
+
+
+// Aliases for shifted symbols
+// Each key has a 4-letter code, and some have longer aliases too.
+// While the long aliases are descriptive, the 4-letter codes
+// make for nicer grid layouts (everything lines up), and are
+// the preferred style for Quantum.
+#define KC_TILD LSFT(KC_GRV)    // ~
+#define KC_TILDE    KC_TILD
+
+#define KC_EXLM LSFT(KC_1)      // !
+#define KC_EXCLAIM  KC_EXLM
+
+#define KC_AT   LSFT(KC_2)      // @
+
+#define KC_HASH LSFT(KC_3)      // #
+
+#define KC_DLR  LSFT(KC_4)      // $
+#define KC_DOLLAR   KC_DLR
+
+#define KC_PERC LSFT(KC_5)      // %
+#define KC_PERCENT  KC_PERC
+
+#define KC_CIRC LSFT(KC_6)      // ^
+#define KC_CIRCUMFLEX   KC_CIRC
+
+#define KC_AMPR LSFT(KC_7)      // &
+#define KC_AMPERSAND    KC_AMPR
+
+#define KC_ASTR LSFT(KC_8)      // *
+#define KC_ASTERISK KC_ASTR
+
+#define KC_LPRN LSFT(KC_9)      // (
+#define KC_LEFT_PAREN   KC_LPRN
+
+#define KC_RPRN LSFT(KC_0)      // )
+#define KC_RIGHT_PAREN  KC_RPRN
+
+#define KC_UNDS LSFT(KC_MINS)   // _
+#define KC_UNDERSCORE   KC_UNDS
+
+#define KC_PLUS LSFT(KC_EQL)    // +
+
+#define KC_LCBR LSFT(KC_LBRC)   // {
+#define KC_LEFT_CURLY_BRACE KC_LCBR
+
+#define KC_RCBR LSFT(KC_RBRC)   // }
+#define KC_RIGHT_CURLY_BRACE    KC_RCBR
+
+#define KC_LABK LSFT(KC_COMM)   // <
+#define KC_LEFT_ANGLE_BRACKET   KC_LABK
+
+#define KC_RABK LSFT(KC_DOT)    // >
+#define KC_RIGHT_ANGLE_BRACKET  KC_RABK
+
+#define KC_COLN LSFT(KC_SCLN)   // :
+#define KC_COLON    KC_COLN
+
+#define KC_PIPE LSFT(KC_BSLS)   // |
+
+#define KC_LT LSFT(KC_COMM)     // <
+
+#define KC_GT LSFT(KC_DOT)      // >
+
+#define KC_QUES LSFT(KC_SLSH)   // ?
+#define KC_QUESTION KC_QUES
+
+#define KC_DQT LSFT(KC_QUOT)   // "
+#define KC_DOUBLE_QUOTE KC_DQT
+#define KC_DQUO KC_DQT
+
+#define KC_DELT KC_DELETE // Del key (four letter code)
+
+// Alias for function layers than expand past FN31
+#define FUNC(kc) (kc | QK_FUNCTION)
+
+// Aliases
+#define S(kc) LSFT(kc)
+#define F(kc) FUNC(kc)
+
+#define M(kc) (kc | QK_MACRO)
+
+#define MACRODOWN(...) (record->event.pressed ? MACRO(__VA_ARGS__) : MACRO_NONE)
+
+// L-ayer, T-ap - 256 keycode max, 16 layer max
+#define LT(layer, kc) (kc | QK_LAYER_TAP | ((layer & 0xF) << 8))
+
+#define AG_SWAP MAGIC_SWAP_ALT_GUI
+#define AG_NORM MAGIC_UNSWAP_ALT_GUI
+
+#define BL_ON  BL_9
+#define BL_OFF BL_0
+
+#define MI_ON MIDI_ON
+#define MI_OFF MIDI_OFF
+
+// GOTO layer - 16 layers max
+// when:
+// ON_PRESS    = 1
+// ON_RELEASE  = 2
+// Unless you have a good reason not to do so, prefer  ON_PRESS (1) as your default.
+// In fact, we changed it to assume ON_PRESS for sanity/simplicity. If needed, you can add your own
+// keycode modeled after the old version, kept below for this.
+/* #define TO(layer, when) (layer | QK_TO | (when << 0x4)) */
+#define TO(layer) (layer | QK_TO | (ON_PRESS << 0x4))
+
+// Momentary switch layer - 256 layer max
+#define MO(layer) (layer | QK_MOMENTARY)
+
+// Set default layer - 256 layer max
+#define DF(layer) (layer | QK_DEF_LAYER)
+
+// Toggle to layer - 256 layer max
+#define TG(layer) (layer | QK_TOGGLE_LAYER)
+
+// One-shot layer - 256 layer max
+#define OSL(layer) (layer | QK_ONE_SHOT_LAYER)
+
+// One-shot mod
+#define OSM(mod) (mod | QK_ONE_SHOT_MOD)
+
+// M-od, T-ap - 256 keycode max
+#define MT(mod, kc) (kc | QK_MOD_TAP | ((mod & 0xF) << 8))
+#define CTL_T(kc) MT(MOD_LCTL, kc)
+#define SFT_T(kc) MT(MOD_LSFT, kc)
+#define ALT_T(kc) MT(MOD_LALT, kc)
+#define GUI_T(kc) MT(MOD_LGUI, kc)
+#define C_S_T(kc) MT((MOD_LCTL | MOD_LSFT), kc) // Control + Shift e.g. for gnome-terminal
+#define MEH_T(kc) MT((MOD_LCTL | MOD_LSFT | MOD_LALT), kc) // Meh is a less hyper version of the Hyper key -- doesn't include Win or Cmd, so just alt+shift+ctrl
+#define LCAG_T(kc) MT((MOD_LCTL | MOD_LALT | MOD_LGUI), kc) // Left control alt and gui
+#define ALL_T(kc) MT((MOD_LCTL | MOD_LSFT | MOD_LALT | MOD_LGUI), kc) // see http://brettterpstra.com/2012/12/08/a-useful-caps-lock-key/
+
+// Dedicated keycode versions for Hyper and Meh, if you want to use them as standalone keys rather than mod-tap
+#define KC_HYPR HYPR(KC_NO)
+#define KC_MEH  MEH(KC_NO)
+
+#ifdef UNICODE_ENABLE
+    // For sending unicode codes.
+    // You may not send codes over 7FFF -- this supports most of UTF8.
+    // To have a key that sends out Œ, go UC(0x0152)
+    #define UNICODE(n) (n | QK_UNICODE)
+    #define UC(n) UNICODE(n)
+#endif
+
+#ifdef UNICODEMAP_ENABLE
+    #define X(n) (n | QK_UNICODE_MAP)
+#endif
+
+#endif // QUANTUM_KEYCODES_H
diff --git a/quantum/rgblight.c b/quantum/rgblight.c
index d550c58660..52a09817a1 100644
--- a/quantum/rgblight.c
+++ b/quantum/rgblight.c
@@ -69,11 +69,12 @@ const uint8_t RGBLED_KNIGHT_INTERVALS[] PROGMEM = {100, 50, 20};
 
 rgblight_config_t rgblight_config;
 rgblight_config_t inmem_config;
-struct cRGB led[RGBLED_NUM];
-uint8_t rgblight_inited = 0;
 
+LED_TYPE led[RGBLED_NUM];
+uint8_t rgblight_inited = 0;
+bool rgblight_timer_enabled = false;
 
-void sethsv(uint16_t hue, uint8_t sat, uint8_t val, struct cRGB *led1) {
+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 (sat == 0) { // Acromatic color (gray). Hue doesn't mind.
@@ -124,7 +125,7 @@ void sethsv(uint16_t hue, uint8_t sat, uint8_t val, struct cRGB *led1) {
   setrgb(r, g, b, led1);
 }
 
-void setrgb(uint8_t r, uint8_t g, uint8_t b, struct cRGB *led1) {
+void setrgb(uint8_t r, uint8_t g, uint8_t b, LED_TYPE *led1) {
   (*led1).r = r;
   (*led1).g = g;
   (*led1).b = b;
@@ -141,9 +142,9 @@ void eeconfig_update_rgblight_default(void) {
   dprintf("eeconfig_update_rgblight_default\n");
   rgblight_config.enable = 1;
   rgblight_config.mode = 1;
-  rgblight_config.hue = 200;
-  rgblight_config.sat = 204;
-  rgblight_config.val = 204;
+  rgblight_config.hue = 0;
+  rgblight_config.sat = 255;
+  rgblight_config.val = 255;
   eeconfig_update_rgblight(rgblight_config.raw);
 }
 void eeconfig_debug_rgblight(void) {
@@ -173,7 +174,7 @@ void rgblight_init(void) {
   }
   eeconfig_debug_rgblight(); // display current eeprom values
 
-  #if !defined(AUDIO_ENABLE) && defined(RGBLIGHT_TIMER)
+  #ifdef RGBLIGHT_ANIMATIONS
     rgblight_timer_init(); // setup the timer
   #endif
 
@@ -182,6 +183,19 @@ void rgblight_init(void) {
   }
 }
 
+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();
+  }
+}
+
 void rgblight_increase(void) {
   uint8_t mode = 0;
   if (rgblight_config.mode < RGBLIGHT_MODES) {
@@ -220,7 +234,7 @@ void rgblight_mode(uint8_t mode) {
   eeconfig_update_rgblight(rgblight_config.raw);
   xprintf("rgblight mode: %u\n", rgblight_config.mode);
   if (rgblight_config.mode == 1) {
-    #if !defined(AUDIO_ENABLE) && defined(RGBLIGHT_TIMER)
+    #ifdef RGBLIGHT_ANIMATIONS
       rgblight_timer_disable();
     #endif
   } else if (rgblight_config.mode >= 2 && rgblight_config.mode <= 23) {
@@ -230,7 +244,7 @@ void rgblight_mode(uint8_t mode) {
     // MODE 15-20, snake
     // MODE 21-23, knight
 
-    #if !defined(AUDIO_ENABLE) && defined(RGBLIGHT_TIMER)
+    #ifdef RGBLIGHT_ANIMATIONS
       rgblight_timer_enable();
     #endif
   }
@@ -244,7 +258,7 @@ void rgblight_toggle(void) {
   if (rgblight_config.enable) {
     rgblight_mode(rgblight_config.mode);
   } else {
-    #if !defined(AUDIO_ENABLE) && defined(RGBLIGHT_TIMER)
+    #ifdef RGBLIGHT_ANIMATIONS
       rgblight_timer_disable();
     #endif
     _delay_ms(50);
@@ -252,6 +266,13 @@ void rgblight_toggle(void) {
   }
 }
 
+void rgblight_enable(void) {
+  rgblight_config.enable = 1;
+  eeconfig_update_rgblight(rgblight_config.raw);
+  xprintf("rgblight enable: rgblight_config.enable = %u\n", rgblight_config.enable);
+  rgblight_mode(rgblight_config.mode);
+}
+
 
 void rgblight_increase_hue(void) {
   uint16_t hue;
@@ -307,7 +328,7 @@ void rgblight_decrease_val(void) {
 void rgblight_sethsv_noeeprom(uint16_t hue, uint8_t sat, uint8_t val) {
   inmem_config.raw = rgblight_config.raw;
   if (rgblight_config.enable) {
-    struct cRGB tmp_led;
+    LED_TYPE tmp_led;
     sethsv(hue, sat, val, &tmp_led);
     inmem_config.hue = hue;
     inmem_config.sat = sat;
@@ -349,68 +370,90 @@ void rgblight_setrgb(uint8_t r, uint8_t g, uint8_t b) {
   rgblight_set();
 }
 
+__attribute__ ((weak))
 void rgblight_set(void) {
   if (rgblight_config.enable) {
-    ws2812_setleds(led, RGBLED_NUM);
+    #ifdef RGBW
+      ws2812_setleds_rgbw(led, RGBLED_NUM);
+    #else
+      ws2812_setleds(led, RGBLED_NUM);
+    #endif
   } else {
     for (uint8_t i = 0; i < RGBLED_NUM; i++) {
       led[i].r = 0;
       led[i].g = 0;
       led[i].b = 0;
     }
-    ws2812_setleds(led, RGBLED_NUM);
+    #ifdef RGBW
+      ws2812_setleds_rgbw(led, RGBLED_NUM);
+    #else
+      ws2812_setleds(led, RGBLED_NUM);
+    #endif
   }
 }
 
-#if !defined(AUDIO_ENABLE) && defined(RGBLIGHT_TIMER)
+#ifdef RGBLIGHT_ANIMATIONS
 
 // Animation timer -- AVR Timer3
 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;
+  // 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;
 }
 void rgblight_timer_enable(void) {
-  TIMSK3 |= _BV(OCIE3A);
+  rgblight_timer_enabled = true;
   dprintf("TIMER3 enabled.\n");
 }
 void rgblight_timer_disable(void) {
-  TIMSK3 &= ~_BV(OCIE3A);
+  rgblight_timer_enabled = false;
   dprintf("TIMER3 disabled.\n");
 }
 void rgblight_timer_toggle(void) {
-  TIMSK3 ^= _BV(OCIE3A);
+  rgblight_timer_enabled ^= rgblight_timer_enabled;
   dprintf("TIMER3 toggled.\n");
 }
 
-ISR(TIMER3_COMPA_vect) {
-  // 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);
+void rgblight_show_solid_color(uint8_t r, uint8_t g, uint8_t b) {
+  rgblight_enable();
+  rgblight_mode(1);
+  rgblight_setrgb(r, g, b);
+}
+
+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 {
+      // mode = 24, christmas mode
+      rgblight_effect_christmas();
+    }
   }
 }
 
@@ -449,7 +492,7 @@ void rgblight_effect_rainbow_swirl(uint8_t interval) {
   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[i]);
+    sethsv(hue, rgblight_config.sat, rgblight_config.val, (LED_TYPE *)&led[i]);
   }
   rgblight_set();
 
@@ -486,7 +529,7 @@ void rgblight_effect_snake(uint8_t interval) {
         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[i]);
+        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]);
       }
     }
   }
@@ -506,7 +549,7 @@ void rgblight_effect_knight(uint8_t interval) {
   static uint16_t last_timer = 0;
   uint8_t i, j, cur;
   int8_t k;
-  struct cRGB preled[RGBLED_NUM];
+  LED_TYPE preled[RGBLED_NUM];
   static int8_t increment = -1;
   if (timer_elapsed(last_timer) < pgm_read_byte(&RGBLED_KNIGHT_INTERVALS[interval])) {
     return;
@@ -525,7 +568,7 @@ void rgblight_effect_knight(uint8_t interval) {
         k = RGBLED_NUM - 1;
       }
       if (i == k) {
-        sethsv(rgblight_config.hue, rgblight_config.sat, rgblight_config.val, &preled[i]);
+        sethsv(rgblight_config.hue, rgblight_config.sat, rgblight_config.val, (LED_TYPE *)&preled[i]);
       }
     }
   }
@@ -555,4 +598,22 @@ void rgblight_effect_knight(uint8_t interval) {
   }
 }
 
+
+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) < 1000) {
+    return;
+  }
+  last_timer = timer_read();
+  current_offset = (current_offset + 1) % 2;
+  for (i = 0; i < RGBLED_NUM; i++) {
+    hue = 0 + ((RGBLED_NUM * (i + current_offset)) % 2) * 80;
+    sethsv(hue, rgblight_config.sat, rgblight_config.val, (LED_TYPE *)&led[i]);
+  }
+  rgblight_set();
+}
+
 #endif
diff --git a/quantum/rgblight.h b/quantum/rgblight.h
index 17f04ffcf2..726b8de72e 100644
--- a/quantum/rgblight.h
+++ b/quantum/rgblight.h
@@ -1,9 +1,8 @@
 #ifndef RGBLIGHT_H
 #define RGBLIGHT_H
 
-
-#if !defined(AUDIO_ENABLE) && defined(RGBLIGHT_TIMER)
-	#define RGBLIGHT_MODES 23
+#ifdef RGBLIGHT_ANIMATIONS
+	#define RGBLIGHT_MODES 24
 #else
 	#define RGBLIGHT_MODES 1
 #endif
@@ -34,12 +33,15 @@
 #endif
 
 #define RGBLED_TIMER_TOP F_CPU/(256*64)
+// #define RGBLED_TIMER_TOP 0xFF10
 
 #include <stdint.h>
 #include <stdbool.h>
 #include "eeconfig.h"
 #include "light_ws2812.h"
 
+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;
@@ -61,9 +63,11 @@ void rgblight_init(void);
 void rgblight_increase(void);
 void rgblight_decrease(void);
 void rgblight_toggle(void);
+void rgblight_enable(void);
 void rgblight_step(void);
 void rgblight_mode(uint8_t mode);
 void rgblight_set(void);
+void rgblight_update_dword(uint32_t dword);
 void rgblight_increase_hue(void);
 void rgblight_decrease_hue(void);
 void rgblight_increase_sat(void);
@@ -78,10 +82,15 @@ void eeconfig_update_rgblight(uint32_t val);
 void eeconfig_update_rgblight_default(void);
 void eeconfig_debug_rgblight(void);
 
-void sethsv(uint16_t hue, uint8_t sat, uint8_t val, struct cRGB *led1);
-void setrgb(uint8_t r, uint8_t g, uint8_t b, struct cRGB *led1);
+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);
 
+#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);
+
 void rgblight_timer_init(void);
 void rgblight_timer_enable(void);
 void rgblight_timer_disable(void);
@@ -91,5 +100,6 @@ 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);
 
 #endif
diff --git a/quantum/variable_trace.c b/quantum/variable_trace.c
new file mode 100644
index 0000000000..de580244c3
--- /dev/null
+++ b/quantum/variable_trace.c
@@ -0,0 +1,110 @@
+#include "variable_trace.h"
+#include <stddef.h>
+#include <string.h>
+
+#ifdef NO_PRINT
+#error "You need undef NO_PRINT to use the variable trace feature"
+#endif
+
+#ifndef CONSOLE_ENABLE
+#error "The console needs to be enabled in the makefile to use the variable trace feature"
+#endif
+
+
+#define NUM_TRACED_VARIABLES 1
+#ifndef MAX_VARIABLE_TRACE_SIZE
+    #define MAX_VARIABLE_TRACE_SIZE 4
+#endif
+
+typedef struct {
+    const char* name;
+    void* addr;
+    unsigned size;
+    const char* func;
+    int line;
+    uint8_t last_value[MAX_VARIABLE_TRACE_SIZE];
+
+} traced_variable_t;
+
+static traced_variable_t traced_variables[NUM_TRACED_VARIABLES];
+
+void add_traced_variable(const char* name, void* addr, unsigned size, const char* func, int line) {
+    verify_traced_variables(func, line);
+    if (size > MAX_VARIABLE_TRACE_SIZE) {
+#if defined(__AVR__)
+       xprintf("Traced variable \"%S\" exceeds the maximum size %d\n", name, size);
+#else
+       xprintf("Traced variable \"%s\" exceeds the maximum size %d\n", name, size);
+#endif
+       size = MAX_VARIABLE_TRACE_SIZE;
+    }
+    int index = -1;
+    for (int i = 0; i < NUM_TRACED_VARIABLES; i++) {
+        if (index == -1 && traced_variables[i].addr == NULL){
+            index = i;
+        }
+        else if (strcmp_P(name, traced_variables[i].name)==0) {
+            index = i;
+            break;
+        }
+    }
+
+    if (index == -1) {
+        xprintf("You can only trace %d variables at the same time\n", NUM_TRACED_VARIABLES);
+        return;
+    }
+
+    traced_variable_t* t = &traced_variables[index];
+    t->name = name;
+    t->addr = addr;
+    t->size = size;
+    t->func = func;
+    t->line = line;
+    memcpy(&t->last_value[0], addr, size);
+
+}
+
+void remove_traced_variable(const char* name, const char* func, int line) {
+    verify_traced_variables(func, line);
+    for (int i = 0; i < NUM_TRACED_VARIABLES; i++) {
+        if (strcmp_P(name, traced_variables[i].name)==0) {
+            traced_variables[i].name = 0;
+            traced_variables[i].addr = NULL;
+            break;
+        }
+    }
+}
+
+void verify_traced_variables(const char* func, int line) {
+    for (int i = 0; i < NUM_TRACED_VARIABLES; i++) {
+        traced_variable_t* t = &traced_variables[i];
+        if (t->addr != NULL && t->name != NULL) {
+            if (memcmp(t->last_value, t->addr, t->size)!=0){
+#if defined(__AVR__)
+               xprintf("Traced variable \"%S\" has been modified\n", t->name);
+               xprintf("Between %S:%d\n", t->func, t->line);
+               xprintf("And %S:%d\n", func, line);
+
+#else
+               xprintf("Traced variable \"%s\" has been modified\n", t->name);
+               xprintf("Between %s:%d\n", t->func, t->line);
+               xprintf("And %s:%d\n", func, line);
+#endif
+               xprintf("Previous value ");
+               for (int j=0; j<t->size;j++) {
+                   print_hex8(t->last_value[j]);
+               }
+               xprintf("\nNew value ");
+               uint8_t* addr = (uint8_t*)(t->addr);
+               for (int j=0; j<t->size;j++) {
+                   print_hex8(addr[j]);
+               }
+               xprintf("\n");
+               memcpy(t->last_value, addr, t->size);
+           }
+        }
+
+        t->func = func;
+        t->line = line;
+    }
+}
diff --git a/quantum/variable_trace.h b/quantum/variable_trace.h
new file mode 100644
index 0000000000..46bd827861
--- /dev/null
+++ b/quantum/variable_trace.h
@@ -0,0 +1,34 @@
+#ifndef VARIABLE_TRACE_H
+#define VARIABLE_TRACE_H
+
+// For more information about the variable tracing see the readme.
+
+#include "print.h"
+
+#ifdef NUM_TRACED_VARIABLES
+
+// Start tracing a variable at the memory address addr
+// The name can be anything and is used only for reporting
+// The size should usually be the same size as the variable you are interested in
+#define ADD_TRACED_VARIABLE(name, addr, size) \
+    add_traced_variable(PSTR(name), (void*)addr, size, PSTR(__FILE__), __LINE__)
+
+// Stop tracing the variable with the given name
+#define REMOVE_TRACED_VARIABLE(name) remove_traced_variable(PSTR(name), PSTR(__FILE__), __LINE__)
+
+// Call to get messages when the variable has been changed
+#define VERIFY_TRACED_VARIABLES() verify_traced_variables(PSTR(__FILE__), __LINE__)
+
+#else
+
+#define ADD_TRACED_VARIABLE(name, addr, size)
+#define REMOVE_TRACED_VARIABLE(name)
+#define VERIFY_TRACED_VARIABLES()
+
+#endif
+
+// Don't call directly, use the macros instead
+void add_traced_variable(const char* name, void* addr, unsigned size, const char* func, int line);
+void remove_traced_variable(const char* name, const char* func, int line);
+void verify_traced_variables(const char* func, int line);
+#endif