Convert ai03/orbit to SPLIT_KEYBOARD (#15340)

15 files changed, 115 insertions, 1544 deletions

diff --git a/keyboards/ai03/orbit/config.h b/keyboards/ai03/orbit/config.h
index 9ad384c8ff..0e4f4c3baf 100644
--- a/keyboards/ai03/orbit/config.h
+++ b/keyboards/ai03/orbit/config.h
@@ -44,13 +44,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define MATRIX_COL_PINS { C7, B4, D7, D6, D4, F1, F0 }
 #define MATRIX_ROW_PINS_RIGHT { B6, B5, B4, D7, E6 }
 #define MATRIX_COL_PINS_RIGHT { D4, D6, F1, F0, F4, F5, C6 }
-
-#define SPLIT_HAND_PIN D5
-
-//#define USE_I2C
-
-#define SELECT_SOFT_SERIAL_SPEED 1
-
 #define UNUSED_PINS
 
 /* COL2ROW, ROW2COL */
@@ -60,6 +53,12 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
  * Split Keyboard specific options, make sure you have 'SPLIT_KEYBOARD = yes' in your rules.mk, and define SOFT_SERIAL_PIN.
  */
 #define SOFT_SERIAL_PIN D0 // or D1, D2, D3, E6
+#define SELECT_SOFT_SERIAL_SPEED 1
+
+#define SPLIT_LED_STATE_ENABLE
+#define SPLIT_LAYER_STATE_ENABLE
+
+#define SPLIT_HAND_PIN D5
 
 #define BACKLIGHT_PIN B7
 // #define BACKLIGHT_BREATHING
diff --git a/keyboards/ai03/orbit/keymaps/default/keymap.c b/keyboards/ai03/orbit/keymaps/default/keymap.c
index 6d4eef27c7..0c93f04897 100644
--- a/keyboards/ai03/orbit/keymaps/default/keymap.c
+++ b/keyboards/ai03/orbit/keymaps/default/keymap.c
@@ -48,25 +48,13 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
 bool process_record_user(uint16_t keycode, keyrecord_t *record) {
 	switch (keycode) {
 		case MANUAL:
-			if (record->event.pressed) 
-			{
-				// Keypress
+			if (record->event.pressed) {
 				SEND_STRING("https://kb.ai03.me/redir/orbit");
-			} 
-			else 
-			{
-				// Key release
 			}
 			break;
 		case DBLZERO:
-			if (record->event.pressed) 
-			{
-				// Keypress
+			if (record->event.pressed) {
 				SEND_STRING("00");
-			} 
-			else 
-			{
-				// Key release
 			}
 			break;
   }
diff --git a/keyboards/ai03/orbit/matrix.c b/keyboards/ai03/orbit/matrix.c
deleted file mode 100644
index 024233524c..0000000000
--- a/keyboards/ai03/orbit/matrix.c
+++ /dev/null
@@ -1,323 +0,0 @@
-/*
-Copyright 2012 Jun Wako <wakojun@gmail.com>
-
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 2 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*/
-
-/*
- * scan matrix
- */
-#include <stdint.h>
-#include <stdbool.h>
-#include "wait.h"
-#include "util.h"
-#include "matrix.h"
-#include "split_util.h"
-#include "config.h"
-#include "split_flags.h"
-#include "quantum.h"
-#include "debounce.h"
-#include "transport.h"
-
-#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
-
-#define ERROR_DISCONNECT_COUNT 5
-
-//#define ROWS_PER_HAND (MATRIX_ROWS / 2)
-
-#ifdef DIRECT_PINS
-static pin_t direct_pins[MATRIX_ROWS][MATRIX_COLS] = DIRECT_PINS;
-#else
-static pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
-static pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
-#endif
-
-/* matrix state(1:on, 0:off) */
-static matrix_row_t matrix[MATRIX_ROWS];
-static matrix_row_t raw_matrix[ROWS_PER_HAND];
-
-// row offsets for each hand
-uint8_t thisHand, thatHand;
-
-// user-defined overridable functions
-
-__attribute__((weak)) void matrix_init_kb(void) { matrix_init_user(); }
-
-__attribute__((weak)) void matrix_scan_kb(void) { matrix_scan_user(); }
-
-__attribute__((weak)) void matrix_init_user(void) {}
-
-__attribute__((weak)) void matrix_scan_user(void) {}
-
-__attribute__((weak)) void matrix_slave_scan_user(void) {}
-
-// helper functions
-
-inline uint8_t matrix_rows(void) { return MATRIX_ROWS; }
-
-inline uint8_t matrix_cols(void) { return MATRIX_COLS; }
-
-inline bool matrix_is_on(uint8_t row, uint8_t col) { return (matrix[row] & ((matrix_row_t)1 << col)); }
-
-inline matrix_row_t matrix_get_row(uint8_t row) { return matrix[row]; }
-
-void matrix_print(void) {
-  print_matrix_header();
-
-  for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
-    print_hex8(row);
-    print(": ");
-    print_matrix_row(row);
-    print("\n");
-  }
-}
-
-uint8_t matrix_key_count(void) {
-  uint8_t count = 0;
-  for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
-    count += matrix_bitpop(i);
-  }
-  return count;
-}
-
-// matrix code
-
-#ifdef DIRECT_PINS
-
-static void init_pins(void) {
-  for (int row = 0; row < MATRIX_ROWS; row++) {
-    for (int col = 0; col < MATRIX_COLS; col++) {
-      pin_t pin = direct_pins[row][col];
-      if (pin != NO_PIN) {
-        setPinInputHigh(pin);
-      }
-    }
-  }
-}
-
-static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
-  matrix_row_t last_row_value = current_matrix[current_row];
-  current_matrix[current_row] = 0;
-
-  for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
-    pin_t pin = direct_pins[current_row][col_index];
-    if (pin != NO_PIN) {
-      current_matrix[current_row] |= readPin(pin) ? 0 : (ROW_SHIFTER << col_index);
-    }
-  }
-
-  return (last_row_value != current_matrix[current_row]);
-}
-
-#elif (DIODE_DIRECTION == COL2ROW)
-
-static void select_row(uint8_t row) {
-  setPinOutput(row_pins[row]);
-  writePinLow(row_pins[row]);
-}
-
-static void unselect_row(uint8_t row) { setPinInputHigh(row_pins[row]); }
-
-static void unselect_rows(void) {
-  for (uint8_t x = 0; x < ROWS_PER_HAND; x++) {
-    setPinInputHigh(row_pins[x]);
-  }
-}
-
-static void init_pins(void) {
-  unselect_rows();
-  for (uint8_t x = 0; x < MATRIX_COLS; x++) {
-    setPinInputHigh(col_pins[x]);
-  }
-}
-
-static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
-  // Store last value of row prior to reading
-  matrix_row_t last_row_value = current_matrix[current_row];
-
-  // 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++) {
-    // Populate the matrix row with the state of the col pin
-    current_matrix[current_row] |= readPin(col_pins[col_index]) ? 0 : (ROW_SHIFTER << col_index);
-  }
-
-  // Unselect row
-  unselect_row(current_row);
-
-  return (last_row_value != current_matrix[current_row]);
-}
-
-#elif (DIODE_DIRECTION == ROW2COL)
-
-static void select_col(uint8_t col) {
-  setPinOutput(col_pins[col]);
-  writePinLow(col_pins[col]);
-}
-
-static void unselect_col(uint8_t col) { setPinInputHigh(col_pins[col]); }
-
-static void unselect_cols(void) {
-  for (uint8_t x = 0; x < MATRIX_COLS; x++) {
-    setPinInputHigh(col_pins[x]);
-  }
-}
-
-static void init_pins(void) {
-  unselect_cols();
-  for (uint8_t x = 0; x < ROWS_PER_HAND; x++) {
-    setPinInputHigh(row_pins[x]);
-  }
-}
-
-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 < ROWS_PER_HAND; 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 (readPin(row_pins[row_index])) {
-      // Pin HI, clear col bit
-      current_matrix[row_index] &= ~(ROW_SHIFTER << current_col);
-    } else {
-      // Pin LO, set 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;
-}
-
-#endif
-
-void matrix_init(void) {
-  debug_enable = true;
-  debug_matrix = true;
-  debug_mouse  = true;
-
-  // Set pinout for right half if pinout for that half is defined
-  if (!isLeftHand) {
-#ifdef MATRIX_ROW_PINS_RIGHT
-    const uint8_t row_pins_right[MATRIX_ROWS] = MATRIX_ROW_PINS_RIGHT;
-    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
-      row_pins[i] = row_pins_right[i];
-    }
-#endif
-#ifdef MATRIX_COL_PINS_RIGHT
-    const uint8_t col_pins_right[MATRIX_COLS] = MATRIX_COL_PINS_RIGHT;
-    for (uint8_t i = 0; i < MATRIX_COLS; i++) {
-      col_pins[i] = col_pins_right[i];
-    }
-#endif
-  }
-
-  thisHand = isLeftHand ? 0 : (ROWS_PER_HAND);
-  thatHand = ROWS_PER_HAND - thisHand;
-
-  // initialize key pins
-  init_pins();
-
-  // initialize matrix state: all keys off
-  for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
-    matrix[i] = 0;
-  }
-
-  debounce_init(ROWS_PER_HAND);
-
-  matrix_init_quantum();
-}
-
-uint8_t _matrix_scan(void) {
-  bool changed = false;
-
-#if defined(DIRECT_PINS) || (DIODE_DIRECTION == COL2ROW)
-  // Set row, read cols
-  for (uint8_t current_row = 0; current_row < ROWS_PER_HAND; current_row++) {
-    changed |= read_cols_on_row(raw_matrix, current_row);
-  }
-#elif (DIODE_DIRECTION == ROW2COL)
-  // Set col, read rows
-  for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
-    changed |= read_rows_on_col(raw_matrix, current_col);
-  }
-#endif
-
-  debounce(raw_matrix, matrix + thisHand, ROWS_PER_HAND, changed);
-
-  return 1;
-}
-
-uint8_t matrix_scan(void) {
-  uint8_t ret = _matrix_scan();
-
-  if (is_keyboard_master()) {
-    static uint8_t error_count;
-
-    if (!transport_master(matrix + thatHand)) {
-      error_count++;
-
-      if (error_count > ERROR_DISCONNECT_COUNT) {
-        // reset other half if disconnected
-        for (int i = 0; i < ROWS_PER_HAND; ++i) {
-          matrix[thatHand + i] = 0;
-        }
-      }
-    } else {
-      error_count = 0;
-    }
-
-    matrix_scan_quantum();
-  } else {
-    transport_slave(matrix + thisHand);
-    matrix_slave_scan_user();
-  }
-
-  return ret;
-}
diff --git a/keyboards/ai03/orbit/orbit.c b/keyboards/ai03/orbit/orbit.c
index 97553e318a..5097f9cd90 100644
--- a/keyboards/ai03/orbit/orbit.c
+++ b/keyboards/ai03/orbit/orbit.c
@@ -15,196 +15,124 @@
  */
 #include "orbit.h"
 #include "split_util.h"
-#include "transport.h"
 
+void led_init_ports(void) {
+    // Initialize indicator LEDs to output
+    if (isLeftHand) {
+        setPinOutput(C6);
+        setPinOutput(B6);
+        setPinOutput(B5);
+    } else {
+        setPinOutput(F6);
+        setPinOutput(F7);
+        setPinOutput(C7);
+    }
+
+    set_layer_indicators(0);
+}
 
 // Call led_toggle to set LEDs easily
 // LED IDs:
-// 
+//
 // (LEFT) 0 1 2   |   3 4 5 (RIGHT)
-
-void led_toggle(int id, bool on) {
-	
-	if (isLeftHand) {
-		switch(id) {
-			case 0:
-				// Left hand C6
-				if (on)
-					//PORTC |= (1<<6);
-					writePinHigh(C6);
-				else
-					//PORTC &= ~(1<<6);
-					writePinLow(C6);
-				break;
-			case 1:
-				// Left hand B6
-				if (on)
-					//PORTB |= (1<<6);
-					writePinHigh(B6);
-				else
-					//PORTB &= ~(1<<6);
-					writePinLow(B6);
-				break;
-			case 2:
-				// Left hand B5
-				if (on)
-					//PORTB |= (1<<5);
-					writePinHigh(B5);
-				else
-					//PORTB &= ~(1<<5);
-					writePinLow(B5);
-				break;
-			default:
-				break;
-		}
-	} else {
-		switch(id) {
-			case 3:
-				// Right hand F6
-				if (on)
-					//PORTF |= (1<<6);
-					writePinHigh(F6);
-				else
-					//PORTF &= ~(1<<6);
-					writePinLow(F6);
-				break;
-			case 4:
-				// Right hand F7
-				if (on)
-					//PORTF |= (1<<7);
-					writePinHigh(F7);
-				else
-					//PORTF &= ~(1<<7);
-					writePinLow(F7);
-				break;
-			case 5:
-				// Right hand C7
-				if (on)
-					//PORTC |= (1<<7);
-					writePinHigh(C7);
-				else
-					//PORTC &= ~(1<<7);
-					writePinLow(C7);
-				break;
-			default:
-				break;
-		}
-	}
+void led_toggle(uint8_t id, bool on) {
+    if (isLeftHand) {
+        switch (id) {
+            case 0:
+                // Left hand C6
+                writePin(C6, on);
+                break;
+            case 1:
+                // Left hand B6
+                writePin(B6, on);
+                break;
+            case 2:
+                // Left hand B5
+                writePin(B5, on);
+                break;
+            default:
+                break;
+        }
+    } else {
+        switch (id) {
+            case 3:
+                // Right hand F6
+                writePin(F6, on);
+                break;
+            case 4:
+                // Right hand F7
+                writePin(F7, on);
+                break;
+            case 5:
+                // Right hand C7
+                writePin(C7, on);
+                break;
+            default:
+                break;
+        }
+    }
 }
 
 // Set all LEDs at once using an array of 6 booleans
 // LED IDs:
-// 
+//
 // (LEFT) 0 1 2   |   3 4 5 (RIGHT)
-// 
+//
 // Ex. set_all_leds({ false, false, false, true, true, true }) would turn off left hand, turn on right hand
 
 void set_all_leds(bool leds[6]) {
-	for (int i = 0; i < 6; i++) {
-		led_toggle(i, leds[i]);
-	}
+    for (int i = 0; i < 6; i++) {
+        led_toggle(i, leds[i]);
+    }
 }
 
 void set_layer_indicators(uint8_t layer) {
-	
-	switch (layer)
-	{
-		case 0:
-			led_toggle(0, true);
-			led_toggle(1, false);
-			led_toggle(2, false);
-			break;
-		case 1:
-			led_toggle(0, true);
-			led_toggle(1, true);
-			led_toggle(2, false);
-			break;
-		case 2:
-			led_toggle(0, true);
-			led_toggle(1, true);
-			led_toggle(2, true);
-			break;
-		case 3:
-			led_toggle(0, false);
-			led_toggle(1, true);
-			led_toggle(2, true);
-			break;
-		case 4:
-			led_toggle(0, false);
-			led_toggle(1, false);
-			led_toggle(2, true);
-			break;
-		default:
-			led_toggle(0, true);
-			led_toggle(1, false);
-			led_toggle(2, true);
-			break;
-	}
-	
+    switch (layer) {
+        case 0:
+            led_toggle(0, true);
+            led_toggle(1, false);
+            led_toggle(2, false);
+            break;
+        case 1:
+            led_toggle(0, true);
+            led_toggle(1, true);
+            led_toggle(2, false);
+            break;
+        case 2:
+            led_toggle(0, true);
+            led_toggle(1, true);
+            led_toggle(2, true);
+            break;
+        case 3:
+            led_toggle(0, false);
+            led_toggle(1, true);
+            led_toggle(2, true);
+            break;
+        case 4:
+            led_toggle(0, false);
+            led_toggle(1, false);
+            led_toggle(2, true);
+            break;
+        default:
+            led_toggle(0, true);
+            led_toggle(1, false);
+            led_toggle(2, true);
+            break;
+    }
 }
 
-void matrix_init_kb(void) {
-	// put your keyboard start-up code here
-	// runs once when the firmware starts up
-	
-	// Initialize indicator LEDs to output
-	if (isLeftHand)
-	{
-		setPinOutput(C6);
-		setPinOutput(B6);
-		setPinOutput(B5);
-		//DDRC |= (1<<6);
-		//DDRB |= (1<<6);
-		//DDRB |= (1<<5);
-	}
-	else
-	{
-		setPinOutput(F6);
-		setPinOutput(F7);
-		setPinOutput(C7);
-		//DDRF |= (1<<6);
-		//DDRF |= (1<<7);
-		//DDRC |= (1<<7);
-	}
-
-	set_layer_indicators(0);
-	
-	matrix_init_user();
+bool led_update_kb(led_t led_state) {
+    bool res = led_update_user(led_state);
+    if (res) {
+        led_toggle(3, led_state.num_lock);
+        led_toggle(4, led_state.caps_lock);
+        led_toggle(5, led_state.scroll_lock);
+    }
+    return res;
 }
 
-void led_set_kb(uint8_t usb_led) {
-	// put your keyboard LED indicator (ex: Caps Lock LED) toggling code here
-	
-	if (is_keyboard_master()) {
-	
-		serial_m2s_buffer.nlock_led = IS_LED_ON(usb_led, USB_LED_NUM_LOCK);
-		serial_m2s_buffer.clock_led = IS_LED_ON(usb_led, USB_LED_CAPS_LOCK);
-		serial_m2s_buffer.slock_led = IS_LED_ON(usb_led, USB_LED_SCROLL_LOCK);
-
-		led_toggle(3, IS_LED_ON(usb_led, USB_LED_NUM_LOCK));
-		led_toggle(4, IS_LED_ON(usb_led, USB_LED_CAPS_LOCK));
-		led_toggle(5, IS_LED_ON(usb_led, USB_LED_SCROLL_LOCK));
-		
-	}
-
-	led_set_user(usb_led);
-}
+layer_state_t layer_state_set_kb(layer_state_t state) {
+    set_layer_indicators(get_highest_layer(state));
 
-uint32_t layer_state_set_kb(uint32_t state) {
-	
-	if (is_keyboard_master())
-	{
-		serial_m2s_buffer.current_layer = biton32(state);
-		
-		// If left half, do the LED toggle thing
-		if (isLeftHand)
-		{
-			set_layer_indicators(biton32(state));
-		}
-		
-	}
-	// NOTE: Do not set slave LEDs here.
-	// This is not called on slave
-	
-	return layer_state_set_user(state);
+    return layer_state_set_user(state);
 }
diff --git a/keyboards/ai03/orbit/orbit.h b/keyboards/ai03/orbit/orbit.h
index 39f1ebb0e3..7f3b1aca32 100644
--- a/keyboards/ai03/orbit/orbit.h
+++ b/keyboards/ai03/orbit/orbit.h
@@ -18,6 +18,8 @@
 
 #include "quantum.h"
 
+#define XXX KC_NO
+
 /* This a shortcut to help you visually see your layout.
  *
  * The first section contains all of the arguments representing the physical
@@ -26,17 +28,6 @@
  * The second converts the arguments into a two-dimensional array which
  * represents the switch matrix.
  */
- 
-#ifdef USE_I2C
-#include <stddef.h>
-#ifdef __AVR__
-  #include <avr/io.h>
-  #include <avr/interrupt.h>
-#endif
-#endif
-
-#define XXX KC_NO
-
 #define LAYOUT( \
     L00, L01, L02, L03, L04, L05, L06, R00, R01, R02, R03, R04, R05, R06, \
     L10, L11, L12, L13, L14, L15, L16, R10, R11, R12, R13, R14, R15, R16, \
@@ -56,6 +47,6 @@
     { R40, R41, R42, R43, R44, R45, XXX } \
 }
 
-extern void led_toggle(int id, bool on);
+void led_toggle(uint8_t id, bool on);
 void set_all_leds(bool leds[6]);
-extern void set_layer_indicators(uint8_t layer);
+void set_layer_indicators(uint8_t layer);
diff --git a/keyboards/ai03/orbit/readme.md b/keyboards/ai03/orbit/readme.md
index 58ba2079d5..0c320929b6 100644
--- a/keyboards/ai03/orbit/readme.md
+++ b/keyboards/ai03/orbit/readme.md
@@ -4,9 +4,9 @@
 
 A split ergonomic keyboard project.  
 
-Keyboard Maintainer: [ai03](https://github.com/ai03-2725)  
-Hardware Supported: The [Orbit PCB](https://github.com/ai03-2725/Orbit)  
-Hardware Availability: [This repository](https://github.com/ai03-2725/Orbit) has PCB files. Case group buy orders are currently closed.  
+* Keyboard Maintainer: [ai03](https://github.com/ai03-2725)
+* Hardware Supported: The [Orbit PCB](https://github.com/ai03-2725/Orbit)
+* Hardware Availability: [This repository](https://github.com/ai03-2725/Orbit) has PCB files. Case group buy orders are currently closed.
 
 Make example for this keyboard (after setting up your build environment):
 
diff --git a/keyboards/ai03/orbit/rules.mk b/keyboards/ai03/orbit/rules.mk
index fc66f9f6d0..5b082d9431 100644
--- a/keyboards/ai03/orbit/rules.mk
+++ b/keyboards/ai03/orbit/rules.mk
@@ -19,12 +19,4 @@ NKRO_ENABLE = yes           # USB Nkey Rollover
 BACKLIGHT_ENABLE = yes      # Enable keyboard backlight functionality
 RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
 AUDIO_ENABLE = no           # Audio output
-USE_I2C = no                # I2C for split communication
-CUSTOM_MATRIX = yes			# For providing custom matrix.c (in this case, override regular matrix.c with split matrix.c)
-# SPLIT_KEYBOARD = yes		# Split keyboard flag disabled as manual edits had to be done to the split common files
-
-SRC += split_util.c \
-	   split_flags.c \
-	   serial.c \
-	   transport.c \
-	   matrix.c
+SPLIT_KEYBOARD = yes		# Split keyboard flag disabled as manual edits had to be done to the split common files
diff --git a/keyboards/ai03/orbit/serial.c b/keyboards/ai03/orbit/serial.c
deleted file mode 100644
index 636dfa0906..0000000000
--- a/keyboards/ai03/orbit/serial.c
+++ /dev/null
@@ -1,545 +0,0 @@
-/*
- * WARNING: be careful changing this code, it is very timing dependent
- *
- * 2018-10-28 checked
- *  avr-gcc 4.9.2
- *  avr-gcc 5.4.0
- *  avr-gcc 7.3.0
- */
-
-#ifndef F_CPU
-#define F_CPU 16000000
-#endif
-
-#include <avr/io.h>
-#include <avr/interrupt.h>
-#include <util/delay.h>
-#include <stddef.h>
-#include <stdbool.h>
-#include "serial.h"
-
-#ifdef SOFT_SERIAL_PIN
-
-#ifdef __AVR_ATmega32U4__
-  // if using ATmega32U4 I2C, can not use PD0 and PD1 in soft serial.
-  #ifdef USE_AVR_I2C
-    #if SOFT_SERIAL_PIN == D0 || SOFT_SERIAL_PIN == D1
-      #error Using ATmega32U4 I2C, so can not use PD0, PD1
-    #endif
-  #endif
-
-  #if SOFT_SERIAL_PIN >= D0 && SOFT_SERIAL_PIN <= D3
-    #define SERIAL_PIN_DDR   DDRD
-    #define SERIAL_PIN_PORT  PORTD
-    #define SERIAL_PIN_INPUT PIND
-    #if SOFT_SERIAL_PIN == D0
-      #define SERIAL_PIN_MASK _BV(PD0)
-      #define EIMSK_BIT       _BV(INT0)
-      #define EICRx_BIT       (~(_BV(ISC00) | _BV(ISC01)))
-      #define SERIAL_PIN_INTERRUPT INT0_vect
-    #elif  SOFT_SERIAL_PIN == D1
-      #define SERIAL_PIN_MASK _BV(PD1)
-      #define EIMSK_BIT       _BV(INT1)
-      #define EICRx_BIT       (~(_BV(ISC10) | _BV(ISC11)))
-      #define SERIAL_PIN_INTERRUPT INT1_vect
-    #elif  SOFT_SERIAL_PIN == D2
-      #define SERIAL_PIN_MASK _BV(PD2)
-      #define EIMSK_BIT       _BV(INT2)
-      #define EICRx_BIT       (~(_BV(ISC20) | _BV(ISC21)))
-      #define SERIAL_PIN_INTERRUPT INT2_vect
-    #elif  SOFT_SERIAL_PIN == D3
-      #define SERIAL_PIN_MASK _BV(PD3)
-      #define EIMSK_BIT       _BV(INT3)
-      #define EICRx_BIT       (~(_BV(ISC30) | _BV(ISC31)))
-      #define SERIAL_PIN_INTERRUPT INT3_vect
-    #endif
-  #elif  SOFT_SERIAL_PIN == E6
-    #define SERIAL_PIN_DDR   DDRE
-    #define SERIAL_PIN_PORT  PORTE
-    #define SERIAL_PIN_INPUT PINE
-    #define SERIAL_PIN_MASK  _BV(PE6)
-    #define EIMSK_BIT        _BV(INT6)
-    #define EICRx_BIT        (~(_BV(ISC60) | _BV(ISC61)))
-    #define SERIAL_PIN_INTERRUPT INT6_vect
-  #else
-  #error invalid SOFT_SERIAL_PIN value
-  #endif
-
-#else
- #error serial.c now support ATmega32U4 only
-#endif
-
-#define ALWAYS_INLINE __attribute__((always_inline))
-#define NO_INLINE __attribute__((noinline))
-#define _delay_sub_us(x)    __builtin_avr_delay_cycles(x)
-
-// parity check
-#define ODD_PARITY 1
-#define EVEN_PARITY 0
-#define PARITY EVEN_PARITY
-
-#ifdef SERIAL_DELAY
-  // custom setup in config.h
-  // #define TID_SEND_ADJUST 2
-  // #define SERIAL_DELAY 6             // micro sec
-  // #define READ_WRITE_START_ADJUST 30 // cycles
-  // #define READ_WRITE_WIDTH_ADJUST 8 // cycles
-#else
-// ============ Standard setups ============
-
-#ifndef SELECT_SOFT_SERIAL_SPEED
-#define SELECT_SOFT_SERIAL_SPEED 1
-//  0: about 189kbps (Experimental only)
-//  1: about 137kbps (default)
-//  2: about 75kbps
-//  3: about 39kbps
-//  4: about 26kbps
-//  5: about 20kbps
-#endif
-
-#if __GNUC__ < 6
-  #define TID_SEND_ADJUST 14
-#else
-  #define TID_SEND_ADJUST 2
-#endif
-
-#if SELECT_SOFT_SERIAL_SPEED == 0
-  // Very High speed
-  #define SERIAL_DELAY 4             // micro sec
-  #if __GNUC__ < 6
-    #define READ_WRITE_START_ADJUST 33 // cycles
-    #define READ_WRITE_WIDTH_ADJUST 3 // cycles
-  #else
-    #define READ_WRITE_START_ADJUST 34 // cycles
-    #define READ_WRITE_WIDTH_ADJUST 7 // cycles
-  #endif
-#elif SELECT_SOFT_SERIAL_SPEED == 1
-  // High speed
-  #define SERIAL_DELAY 6             // micro sec
-  #if __GNUC__ < 6
-    #define READ_WRITE_START_ADJUST 30 // cycles
-    #define READ_WRITE_WIDTH_ADJUST 3 // cycles
-  #else
-    #define READ_WRITE_START_ADJUST 33 // cycles
-    #define READ_WRITE_WIDTH_ADJUST 7 // cycles
-  #endif
-#elif SELECT_SOFT_SERIAL_SPEED == 2
-  // Middle speed
-  #define SERIAL_DELAY 12            // micro sec
-  #define READ_WRITE_START_ADJUST 30 // cycles
-  #if __GNUC__ < 6
-    #define READ_WRITE_WIDTH_ADJUST 3 // cycles
-  #else
-    #define READ_WRITE_WIDTH_ADJUST 7 // cycles
-  #endif
-#elif SELECT_SOFT_SERIAL_SPEED == 3
-  // Low speed
-  #define SERIAL_DELAY 24            // micro sec
-  #define READ_WRITE_START_ADJUST 30 // cycles
-  #if __GNUC__ < 6
-    #define READ_WRITE_WIDTH_ADJUST 3 // cycles
-  #else
-    #define READ_WRITE_WIDTH_ADJUST 7 // cycles
-  #endif
-#elif SELECT_SOFT_SERIAL_SPEED == 4
-  // Very Low speed
-  #define SERIAL_DELAY 36            // micro sec
-  #define READ_WRITE_START_ADJUST 30 // cycles
-  #if __GNUC__ < 6
-    #define READ_WRITE_WIDTH_ADJUST 3 // cycles
-  #else
-    #define READ_WRITE_WIDTH_ADJUST 7 // cycles
-  #endif
-#elif SELECT_SOFT_SERIAL_SPEED == 5
-  // Ultra Low speed
-  #define SERIAL_DELAY 48            // micro sec
-  #define READ_WRITE_START_ADJUST 30 // cycles
-  #if __GNUC__ < 6
-    #define READ_WRITE_WIDTH_ADJUST 3 // cycles
-  #else
-    #define READ_WRITE_WIDTH_ADJUST 7 // cycles
-  #endif
-#else
-#error invalid SELECT_SOFT_SERIAL_SPEED value
-#endif /* SELECT_SOFT_SERIAL_SPEED */
-#endif /* SERIAL_DELAY */
-
-#define SERIAL_DELAY_HALF1 (SERIAL_DELAY/2)
-#define SERIAL_DELAY_HALF2 (SERIAL_DELAY - SERIAL_DELAY/2)
-
-#define SLAVE_INT_WIDTH_US 1
-#ifndef SERIAL_USE_MULTI_TRANSACTION
-  #define SLAVE_INT_RESPONSE_TIME SERIAL_DELAY
-#else
-  #define SLAVE_INT_ACK_WIDTH_UNIT 2
-  #define SLAVE_INT_ACK_WIDTH 4
-#endif
-
-static SSTD_t *Transaction_table = NULL;
-static uint8_t Transaction_table_size = 0;
-
-inline static void serial_delay(void) ALWAYS_INLINE;
-inline static
-void serial_delay(void) {
-  _delay_us(SERIAL_DELAY);
-}
-
-inline static void serial_delay_half1(void) ALWAYS_INLINE;
-inline static
-void serial_delay_half1(void) {
-  _delay_us(SERIAL_DELAY_HALF1);
-}
-
-inline static void serial_delay_half2(void) ALWAYS_INLINE;
-inline static
-void serial_delay_half2(void) {
-  _delay_us(SERIAL_DELAY_HALF2);
-}
-
-inline static void serial_output(void) ALWAYS_INLINE;
-inline static
-void serial_output(void) {
-  SERIAL_PIN_DDR |= SERIAL_PIN_MASK;
-}
-
-// make the serial pin an input with pull-up resistor
-inline static void serial_input_with_pullup(void) ALWAYS_INLINE;
-inline static
-void serial_input_with_pullup(void) {
-  SERIAL_PIN_DDR  &= ~SERIAL_PIN_MASK;
-  SERIAL_PIN_PORT |= SERIAL_PIN_MASK;
-}
-
-inline static uint8_t serial_read_pin(void) ALWAYS_INLINE;
-inline static
-uint8_t serial_read_pin(void) {
-  return !!(SERIAL_PIN_INPUT & SERIAL_PIN_MASK);
-}
-
-inline static void serial_low(void) ALWAYS_INLINE;
-inline static
-void serial_low(void) {
-  SERIAL_PIN_PORT &= ~SERIAL_PIN_MASK;
-}
-
-inline static void serial_high(void) ALWAYS_INLINE;
-inline static
-void serial_high(void) {
-  SERIAL_PIN_PORT |= SERIAL_PIN_MASK;
-}
-
-void soft_serial_initiator_init(SSTD_t *sstd_table, int sstd_table_size)
-{
-    Transaction_table = sstd_table;
-    Transaction_table_size = (uint8_t)sstd_table_size;
-    serial_output();
-    serial_high();
-}
-
-void soft_serial_target_init(SSTD_t *sstd_table, int sstd_table_size)
-{
-    Transaction_table = sstd_table;
-    Transaction_table_size = (uint8_t)sstd_table_size;
-    serial_input_with_pullup();
-
-    // Enable INT0-INT3,INT6
-    EIMSK |= EIMSK_BIT;
-#if SERIAL_PIN_MASK == _BV(PE6)
-    // Trigger on falling edge of INT6
-    EICRB &= EICRx_BIT;
-#else
-    // Trigger on falling edge of INT0-INT3
-    EICRA &= EICRx_BIT;
-#endif
-}
-
-// Used by the sender to synchronize timing with the reciver.
-static void sync_recv(void) NO_INLINE;
-static
-void sync_recv(void) {
-  for (uint8_t i = 0; i < SERIAL_DELAY*5 && serial_read_pin(); i++ ) {
-  }
-  // This shouldn't hang if the target disconnects because the
-  // serial line will float to high if the target does disconnect.
-  while (!serial_read_pin());
-}
-
-// Used by the reciver to send a synchronization signal to the sender.
-static void sync_send(void) NO_INLINE;
-static
-void sync_send(void) {
-  serial_low();
-  serial_delay();
-  serial_high();
-}
-
-// Reads a byte from the serial line
-static uint8_t serial_read_chunk(uint8_t *pterrcount, uint8_t bit) NO_INLINE;
-static uint8_t serial_read_chunk(uint8_t *pterrcount, uint8_t bit) {
-    uint8_t byte, i, p, pb;
-
-  _delay_sub_us(READ_WRITE_START_ADJUST);
-  for( i = 0, byte = 0, p = PARITY; i < bit; i++ ) {
-      serial_delay_half1();   // read the middle of pulses
-      if( serial_read_pin() ) {
-          byte = (byte << 1) | 1; p ^= 1;
-      } else {
-          byte = (byte << 1) | 0; p ^= 0;
-      }
-      _delay_sub_us(READ_WRITE_WIDTH_ADJUST);
-      serial_delay_half2(