2020 May 30 Breaking Changes Update (#9215)

* Branch point for 2020 May 30 Breaking Change

* Migrate `ACTION_LAYER_TOGGLE` to `TG()` (#8954)

* Migrate `ACTION_MODS_ONESHOT` to `OSM()` (#8957)

* Migrate `ACTION_DEFAULT_LAYER_SET` to `DF()` (#8958)

* Migrate `ACTION_LAYER_MODS` to `LM()` (#8959)

* Migrate `ACTION_MODS_TAP_KEY` to `MT()` (#8968)

* Convert V-USB usbdrv to a submodule (#8321)

* Unify Tap Hold functions and documentation (#8348)

* Changing board names to prevent confusion (#8412)

* Move the Keyboardio Model01 to a keyboardio/ subdir (#8499)

* Move spaceman keyboards (#8830)

* Migrate miscellaneous `fn_actions` entries (#8977)

* Migrate `ACTION_MODS_KEY` to chained mod keycodes (#8979)

* Organizing my keyboards (plaid, tartan, ergoinu) (#8537)

* Refactor Lily58 to use split_common (#6260)

* Refactor zinc to use split_common (#7114)

* Add a message if bin/qmk doesn't work (#9000)

* Fix conflicting types for 'tfp_printf' (#8269)

* Fixed RGB_DISABLE_AFTER_TIMEOUT to be seconds based & small internals cleanup (#6480)

* Refactor and updates to TKC1800 code (#8472)

* Switch to qmk forks for everything (#9019)

* audio refactor: replace deprecated PLAY_NOTE_ARRAY (#8484)

* Audio enable corrections (2/3) (#8903)

* Split HHKB to ANSI and JP layouts and Add VIA support for each (#8582)

* Audio enable corrections (Part 4) (#8974)

* Fix typo from PR7114 (#9171)

* Augment future branch Changelogs (#8978)

* Revert "Branch point for 2020 May 30 Breaking Change"

18 files changed, 1313 insertions, 0 deletions

diff --git a/keyboards/dm9records/ergoinu/config.h b/keyboards/dm9records/ergoinu/config.h
new file mode 100644
index 000000000..dfc8a5293
--- /dev/null
+++ b/keyboards/dm9records/ergoinu/config.h
@@ -0,0 +1,109 @@
+/*
+Copyright 2012 Jun Wako <wakojun@gmail.com>
+Copyright 2015 Jack Humbert
+Copyright 2018 Takuya Urakawa<twitter:@hsgw>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#pragma once
+
+#include "config_common.h"
+#include <serial_config.h>
+
+/* USB Device descriptor parameter
+   VID & PID are lisenced from microchip sublisence program, Don't use other project! */
+#define VENDOR_ID       0x04D8
+#define PRODUCT_ID      0xEE60
+#define DEVICE_VER      0x0001
+#define MANUFACTURER    Dm9Records
+#define PRODUCT         ergoinu
+#define DESCRIPTION     An (Not Portable But Small) Ergonomic split keyboard
+
+#define TAPPING_FORCE_HOLD
+#define TAPPING_TERM 100
+
+#define USE_SERIAL
+
+/* Select hand configuration */
+#define MASTER_LEFT
+// #define MASTER_RIGHT
+// #define EE_HANDS
+
+/* key matrix size */
+// Rows are doubled-up
+#define MATRIX_ROWS 10
+#define MATRIX_ROW_PINS { F6, F7, B1, B3, B2 }
+
+// wiring of each half
+#define MATRIX_COLS 7
+#define MATRIX_COL_PINS { B4, E6, D7, C6, D4, F5, F4 }
+
+/* define if matrix has ghost */
+//#define MATRIX_HAS_GHOST
+
+/* number of backlight levels */
+// #define BACKLIGHT_LEVELS 3
+
+/* Set 0 if debouncing isn't needed */
+#define DEBOUNCE 5
+
+/* Mechanical locking support. Use KC_LCAP, KC_LNUM or KC_LSCR instead in keymap */
+//#define LOCKING_SUPPORT_ENABLE
+/* Locking resynchronize hack */
+//#define LOCKING_RESYNC_ENABLE
+
+/* ws2812 RGB LED */
+#define RGB_DI_PIN B6
+
+#define RGBLED_NUM 7
+
+#ifndef IOS_DEVICE_ENABLE
+  #if RGBLED_NUM <= 7
+    #define RGBLIGHT_LIMIT_VAL 255
+    #define RGBLIGHT_VAL_STEP 17
+  #endif
+#else
+  #define RGBLIGHT_LIMIT_VAL 90
+  #define RGBLIGHT_VAL_STEP 4
+#endif
+
+#define RGBLIGHT_HUE_STEP 10
+#define RGBLIGHT_SAT_STEP 17
+
+#if defined(RGBLIGHT_ENABLE) && !defined(IOS_DEVICE_ENABLE)
+  #define USB_MAX_POWER_CONSUMPTION 500
+#else
+  // fix iPhone and iPad power adapter issue
+  // iOS device need lessthan 100
+  #define USB_MAX_POWER_CONSUMPTION 100
+#endif
+
+/*
+ * Feature disable options
+ *  These options are also useful to firmware size reduction.
+ */
+
+/* disable debug print */
+// #define NO_DEBUG
+
+/* disable print */
+// #define NO_PRINT
+
+/* disable action features */
+//#define NO_ACTION_LAYER
+//#define NO_ACTION_TAPPING
+//#define NO_ACTION_ONESHOT
+//#define NO_ACTION_MACRO
+//#define NO_ACTION_FUNCTION
diff --git a/keyboards/dm9records/ergoinu/ergoinu.c b/keyboards/dm9records/ergoinu/ergoinu.c
new file mode 100644
index 000000000..b43ab17c8
--- /dev/null
+++ b/keyboards/dm9records/ergoinu/ergoinu.c
@@ -0,0 +1,5 @@
+#include "ergoinu.h"
+
+void matrix_init_kb(void) {
+	matrix_init_user();
+};
diff --git a/keyboards/dm9records/ergoinu/ergoinu.h b/keyboards/dm9records/ergoinu/ergoinu.h
new file mode 100644
index 000000000..43249a844
--- /dev/null
+++ b/keyboards/dm9records/ergoinu/ergoinu.h
@@ -0,0 +1,44 @@
+/*
+Copyright 2018 Takuya Urakawa<twitter:@hsgw>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#pragma once
+
+#include "quantum.h"
+
+#ifdef RGBLIGHT_ENABLE
+#include "ws2812.h"
+#endif
+
+#define LAYOUT( \
+  L00, L01, L02, L03, L04, L05, L06, R00, R01, R02, R03, R04, R05, R06, \
+  L07, L08, L09, L10, L11, L12, L13, R07, R08, R09, R10, R11, R12, R13, \
+  L14,      L15, L16, L17, L18, L19, R14, R15, R16, R17, R18, R19, R20, \
+  L20,      L21, L22, L23, L24, L25, R21, R22, R23, R24, R25, R26, R27,\
+            L26, L27, L28, L29, L30, R28, R29, R30, R31, R32 \
+  ) { \
+    { L00, L01, L02, L03, L04, L05, L06 }, \
+    { L07, L08, L09, L10, L11, L12, L13 }, \
+    { L14, KC_NO, L15, L16, L17, L18, L19 }, \
+    { L20, KC_NO, L21, L22, L23, L24, L25 }, \
+    { KC_NO, KC_NO, L26, L27, L28, L29, L30}, \
+    { R06, R05, R04, R03, R02, R01, R00 }, \
+    { R13, R12, R11, R10, R09, R08, R07 }, \
+    { R20, R19, R18, R17, R16, R15, R14 }, \
+    { R27, R26, R25, R24, R23, R22, R21 }, \
+    { KC_NO, KC_NO, R32, R31, R30, R29, R28 } \
+  }
+
diff --git a/keyboards/dm9records/ergoinu/info.json b/keyboards/dm9records/ergoinu/info.json
new file mode 100644
index 000000000..3627049a5
--- /dev/null
+++ b/keyboards/dm9records/ergoinu/info.json
@@ -0,0 +1,87 @@
+{
+  "keyboard_name": "Ergoinu",
+  "url": "",
+  "maintainer": "hsgw(Takuya Urakawa)",
+  "width": 18,
+  "height": 5.4,
+  "layouts": {
+    "LAYOUT": {
+      "key_count": 64,
+      "layout": [
+        { "x": 0, "y": 0.6, "label": "ESC" },
+        { "x": 1, "y": 0.4, "label": "1" },
+        { "x": 2, "y": 0.4, "label": "2" },
+        { "x": 3, "y": 0.25, "label": "3" },
+        { "x": 4, "y": 0, "label": "4" },
+        { "x": 5, "y": 0.25, "label": "5" },
+        { "x": 6, "y": 0.4, "label": "6" },
+
+        { "x": 11, "y": 0.4, "label": "7" },
+        { "x": 12, "y": 0.25, "label": "8" },
+        { "x": 13, "y": 0, "label": "9" },
+        { "x": 14, "y": 0.25, "label": "0" },
+        { "x": 15, "y": 0.4, "label": "MINUS" },
+        { "x": 16, "y": 0.4, "label": "EQUAL" },
+        { "x": 17, "y": 0.6, "label": "BACKSLASH" },
+
+        { "x": 0, "y": 1.6, "label": "DELETE" },
+        { "x": 1, "y": 1.4, "label": "TAB" },
+        { "x": 2, "y": 1.4, "label": "Q" },
+        { "x": 3, "y": 1.25, "label": "W" },
+        { "x": 4, "y": 1, "label": "E" },
+        { "x": 5, "y": 1.25, "label": "R" },
+        { "x": 6, "y": 1.4, "label": "T" },
+
+        { "x": 11, "y": 1.4, "label": "Y" },
+        { "x": 12, "y": 1.25, "label": "U" },
+        { "x": 13, "y": 1, "label": "I" },
+        { "x": 14, "y": 1.25, "label": "O" },
+        { "x": 15, "y": 1.4, "label": "P" },
+        { "x": 16, "y": 1.4, "label": "LBRACKET" },
+        { "x": 17, "y": 1.6, "label": "RBRACKET" },
+
+        { "x": 0.25, "y": 2.6, "w": 1.75, "label": "LCTRL" },
+        { "x": 2, "y": 2.4, "label": "A" },
+        { "x": 3, "y": 2.25, "label": "S" },
+        { "x": 4, "y": 2, "label": "D" },
+        { "x": 5, "y": 2.25, "label": "F" },
+        { "x": 6, "y": 2.4, "label": "G" },
+
+        { "x": 11, "y": 2.4, "label": "H" },
+        { "x": 12, "y": 2.25, "label": "J" },
+        { "x": 13, "y": 2, "label": "K" },
+        { "x": 14, "y": 2.25, "label": "L" },
+        { "x": 15, "y": 2.4, "label": "SEMICOLON" },
+        { "x": 16, "y": 2.4, "label": "QUOTE" },
+        { "x": 17, "y": 2.6, "label": "GRAVE" },
+
+        { "x": 0.25, "y": 3.6, "w": 1.75, "label": "LSHIFT" },
+        { "x": 2, "y": 3.4, "label": "Z" },
+        { "x": 3, "y": 3.25, "label": "X" },
+        { "x": 4, "y": 3, "label": "C" },
+        { "x": 5, "y": 3.25, "label": "V" },
+        { "x": 6, "y": 3.4, "label": "B" },
+
+        { "x": 11, "y": 3.4, "label": "N" },
+        { "x": 12, "y": 3.25, "label": "M" },
+        { "x": 13, "y": 3, "label": "COMMA" },
+        { "x": 14, "y": 3.25, "label": "DOT" },
+        { "x": 15, "y": 3.4, "label": "SLASH" },
+        { "x": 16, "y": 3.4, "label": "RSHIFT" },
+        { "x": 17, "y": 3.6, "label": "RSHIFT" },
+
+        { "x": 3, "y": 4.25, "label": "MO(META)" },
+        { "x": 4, "y": 4, "label": "LALT" },
+        { "x": 5, "y": 4.25, "label": "LGUI" },
+        { "x": 6, "y": 4.4, "label": "ENT" },
+        { "x": 7, "y": 4.4, "w": 1.5, "label": "SPACE" },
+
+        { "x": 9.5, "y": 4.4, "w": 1.5, "label": "ENTER" },
+        { "x": 11, "y": 4.4, "label": "BACKSPACE" },
+        { "x": 12, "y": 4.25, "label": "RGUI" },
+        { "x": 13, "y": 4, "label": "RALT" },
+        { "x": 14, "y": 4.25, "label": "MO(META)" }
+      ]
+    }
+  }
+}
diff --git a/keyboards/dm9records/ergoinu/keymaps/default/config.h b/keyboards/dm9records/ergoinu/keymaps/default/config.h
new file mode 100644
index 000000000..bb266f25e
--- /dev/null
+++ b/keyboards/dm9records/ergoinu/keymaps/default/config.h
@@ -0,0 +1,24 @@
+/*
+This is the c configuration file for the keymap
+
+Copyright 2012 Jun Wako <wakojun@gmail.com>
+Copyright 2015 Jack Humbert
+Copyright 2018 Takuya Urakawa <Twitter:@hsgw>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#pragma once
+
+#define RGBLIGHT_ANIMATIONS
diff --git a/keyboards/dm9records/ergoinu/keymaps/default/keymap.c b/keyboards/dm9records/ergoinu/keymaps/default/keymap.c
new file mode 100644
index 000000000..7f1be4796
--- /dev/null
+++ b/keyboards/dm9records/ergoinu/keymaps/default/keymap.c
@@ -0,0 +1,101 @@
+#include QMK_KEYBOARD_H
+
+#ifdef RGBLIGHT_ENABLE
+//Following line allows macro to read current RGB settings
+extern rgblight_config_t rgblight_config;
+#endif
+
+#define JA_CLON KC_QUOT  // : and +
+#define JA_AT   KC_LBRC  // @ and `
+#define JA_HAT  KC_EQL   // ^ and ~
+#define JA_ENUN KC_RO    // \ and _ (EN mark and UNder score)
+#define JA_ENVL KC_JYEN  // \ and | (EN mark and Vertical Line)
+#define JA_LBRC KC_RBRC  // [ and {
+#define JA_RBRC KC_BSLS  // ] and }
+
+enum LAYER_NO {
+  BASE = 0,
+  META,
+  CONF
+};
+
+enum CUSTOM_KEYCODES {
+  RGB_RST = SAFE_RANGE,
+  RGB_TYPE,
+};
+
+// Fillers to make layering more clear
+#define ______ KC_TRNS
+#define XXXXXX KC_NO
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+  [BASE] = LAYOUT( \
+    KC_ESC,  KC_1,    KC_2,    KC_3,    KC_4,     KC_5,    KC_6,    KC_7,   KC_8,    KC_9,    KC_0,    KC_MINS, KC_EQL,   KC_BSLS, \
+    KC_DEL,  KC_TAB,  KC_Q,    KC_W,    KC_E,     KC_R,    KC_T,    KC_Y,   KC_U,    KC_I,    KC_O,    KC_P,    KC_LBRC,  KC_RBRC, \
+    KC_LCTL,          KC_A,    KC_S,    KC_D,     KC_F,    KC_G,    KC_H,   KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT,  KC_GRV, \
+    KC_LSFT,          KC_Z,    KC_X,    KC_C,     KC_V,    KC_B,    KC_N,   KC_M,    KC_COMM, KC_DOT,  KC_SLSH, KC_RSFT,  KC_RSFT, \
+                      MO(META),KC_LALT, KC_LGUI,  KC_ENT,  KC_SPC,  KC_ENT, KC_BSPC, KC_RGUI, KC_RALT, MO(META) \
+  ),
+
+  [META] = LAYOUT( \
+    MO(CONF),KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,  KC_INS, \
+    ______,  KC_CAPS, ______,  ______,  ______,  ______,  ______,  ______,  ______,  ______,  KC_SLCK, KC_PSCR, KC_HOME, KC_END, \
+    ______,           ______,  ______,  ______,  ______,  ______,  ______,  ______,  ______,  KC_PAUS, KC_PGUP, KC_UP,   KC_PGDN, \
+    ______,           ______,  ______,  ______,  ______,  ______,  ______,  ______,  ______,  ______,  KC_LEFT, KC_DOWN, KC_RGHT, \
+                      ______,  ______,  ______,  ______,  ______,  ______,  ______,  ______,  ______, ______ \
+  ),
+ [CONF] = LAYOUT( \
+    ______,  RGB_TYPE,RGB_MOD,  RGB_VAI, RGB_HUI, RGB_HUI,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX, \
+    RGB_RST, RGB_TOG, RGB_RMOD, RGB_VAD, RGB_HUD, RGB_HUD,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX, \
+    XXXXXX,           XXXXXX,   XXXXXX,  XXXXXX,  XXXXXX,   XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX, \
+    XXXXXX,           XXXXXX,   XXXXXX,  XXXXXX,  XXXXXX,   XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX, \
+                      XXXXXX,   XXXXXX,  XXXXXX,  XXXXXX,   XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX \
+  )
+};
+
+bool enableLEDTypeAnime = false;
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+  switch(keycode) {
+    case RGB_RST:
+      #ifdef RGBLIGHT_ENABLE
+        if (record->event.pressed) {
+          eeconfig_update_rgblight_default();
+          rgblight_enable();
+        }
+      #endif
+      break;
+    case RGB_MOD:
+      #ifdef RGBLIGHT_ENABLE
+          if (record->event.pressed) {
+            enableLEDTypeAnime = false;
+            rgblight_step();
+          }
+      #endif
+      return false;
+    case RGB_TYPE:
+      #ifdef RGBLIGHT_ENABLE
+        if (record->event.pressed) {
+          rgblight_enable_noeeprom();
+          rgblight_mode_noeeprom(1);
+          enableLEDTypeAnime = !enableLEDTypeAnime;
+        }
+      #endif
+      return false;
+    default:
+      break;
+  }
+  #ifdef RGBLIGHT_ENABLE
+    if(enableLEDTypeAnime) {
+      rgblight_mode_noeeprom(1);
+      uint16_t hue = (rgblight_config.hue + 5) % 360;
+      rgblight_sethsv_noeeprom(hue, rgblight_config.sat, rgblight_config.val);
+    }
+  #endif
+
+  return true;
+}
+
+void matrix_init_user(void) {
+}
diff --git a/keyboards/dm9records/ergoinu/keymaps/default/rules.mk b/keyboards/dm9records/ergoinu/keymaps/default/rules.mk
new file mode 100644
index 000000000..b2eff12b0
--- /dev/null
+++ b/keyboards/dm9records/ergoinu/keymaps/default/rules.mk
@@ -0,0 +1,29 @@
+
+# Build Options
+#   change to "no" to disable the options, or define them in the Makefile in
+#   the appropriate keymap folder that will get included automatically
+#
+BOOTMAGIC_ENABLE = no       # Virtual DIP switch configuration
+MOUSEKEY_ENABLE = no       # Mouse keys
+EXTRAKEY_ENABLE = no       # Audio control and System control
+CONSOLE_ENABLE = no         # Console for debug
+COMMAND_ENABLE = no        # Commands for debug and configuration
+NKRO_ENABLE = no            # Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+BACKLIGHT_ENABLE = no      # Enable keyboard backlight functionality
+MIDI_ENABLE = no            # MIDI controls
+AUDIO_ENABLE = no           # Audio output on port C6
+UNICODE_ENABLE = no         # Unicode
+BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
+RGBLIGHT_ENABLE = yes        # Enable WS2812 RGB underlight. 
+SWAP_HANDS_ENABLE = no        # Enable one-hand typing
+
+# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
+SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend
+
+# ergoinu configs
+DISABLE_PROMICRO_LEDs = yes
+
+# Uncomment these for debugging
+# $(info -- RGBLIGHT_ENABLE=$(RGBLIGHT_ENABLE))
+# $(info -- OPT_DEFS=$(OPT_DEFS))
+# $(info )
diff --git a/keyboards/dm9records/ergoinu/keymaps/default_jis/config.h b/keyboards/dm9records/ergoinu/keymaps/default_jis/config.h
new file mode 100644
index 000000000..bb266f25e
--- /dev/null
+++ b/keyboards/dm9records/ergoinu/keymaps/default_jis/config.h
@@ -0,0 +1,24 @@
+/*
+This is the c configuration file for the keymap
+
+Copyright 2012 Jun Wako <wakojun@gmail.com>
+Copyright 2015 Jack Humbert
+Copyright 2018 Takuya Urakawa <Twitter:@hsgw>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#pragma once
+
+#define RGBLIGHT_ANIMATIONS
diff --git a/keyboards/dm9records/ergoinu/keymaps/default_jis/keymap.c b/keyboards/dm9records/ergoinu/keymaps/default_jis/keymap.c
new file mode 100644
index 000000000..3a1a88f47
--- /dev/null
+++ b/keyboards/dm9records/ergoinu/keymaps/default_jis/keymap.c
@@ -0,0 +1,101 @@
+#include QMK_KEYBOARD_H
+
+#ifdef RGBLIGHT_ENABLE
+//Following line allows macro to read current RGB settings
+extern rgblight_config_t rgblight_config;
+#endif
+
+#define JA_CLON KC_QUOT  // : and +
+#define JA_AT   KC_LBRC  // @ and `
+#define JA_HAT  KC_EQL   // ^ and ~
+#define JA_ENUN KC_RO    // \ and _ (EN mark and UNder score)
+#define JA_ENVL KC_JYEN  // \ and | (EN mark and Vertical Line)
+#define JA_LBRC KC_RBRC  // [ and {
+#define JA_RBRC KC_BSLS  // ] and }
+
+enum LAYER_NO {
+  BASE = 0,
+  META,
+  CONF
+};
+
+enum CUSTOM_KEYCODES {
+  RGB_RST = SAFE_RANGE,
+  RGB_TYPE,
+};
+
+// Fillers to make layering more clear
+#define ______ KC_TRNS
+#define XXXXXX KC_NO
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+  [BASE] = LAYOUT( \
+    KC_ESC,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,   KC_8,    KC_9,    KC_0,    KC_MINS, JA_HAT,   KC_JYEN, \
+    KC_DEL,  KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,    KC_Y,   KC_U,    KC_I,    KC_O,    KC_P,    JA_AT,    JA_LBRC, \
+    KC_LCTL,          KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,   KC_J,    KC_K,    KC_L,    KC_SCLN, JA_CLON,  JA_RBRC, \
+    KC_LSFT,          KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,   KC_M,    KC_COMM, KC_DOT,  KC_SLSH, KC_RO,    KC_RSFT, \
+                      MO(META),KC_LALT, KC_ZKHK, KC_BSPC, KC_SPC,  KC_ENT, KC_BSPC, KC_MHEN, KC_KANA, MO(META) \
+  ),
+
+
+  [META] = LAYOUT( \
+    MO(CONF),KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,  KC_INS, \
+    ______,  KC_CAPS, ______,  KC_UP,   ______,  ______,  ______,  ______,  ______,  ______,  KC_SLCK, KC_PSCR, KC_HOME, KC_END, \
+    ______,           KC_LEFT, KC_DOWN, KC_RGHT, ______,  ______,  ______,  ______,  ______,  KC_PAUS, KC_PGUP, KC_UP,   KC_PGDN, \
+    ______,           ______,  ______,  ______,  ______,  ______,  ______,  ______,  ______,  ______,  KC_LEFT, KC_DOWN, KC_RGHT, \
+                      ______,  ______,  KC_RGUI, KC_DEL,  KC_ENT,  ______,  KC_DEL,  KC_HENK, KC_LGUI, ______ \
+  ),
+ [CONF] = LAYOUT( \
+    ______,  RGB_TYPE,RGB_MOD,  RGB_VAI, RGB_HUI, RGB_HUI,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX, \
+    RGB_RST, RGB_TOG, RGB_RMOD, RGB_VAD, RGB_HUD, RGB_HUD,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX, \
+    XXXXXX,           XXXXXX,   XXXXXX,  XXXXXX,  XXXXXX,   XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX, \
+    XXXXXX,           XXXXXX,   XXXXXX,  XXXXXX,  XXXXXX,   XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX, \
+                      XXXXXX,   XXXXXX,  XXXXXX,  XXXXXX,   XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX,  XXXXXX \
+  )
+};
+
+bool enableLEDTypeAnime = false;
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+  switch(keycode) {
+    case RGB_RST:
+      #ifdef RGBLIGHT_ENABLE
+        if (record->event.pressed) {
+          eeconfig_update_rgblight_default();
+          rgblight_enable();
+        }
+      #endif
+      break;
+    case RGB_MOD:
+      #ifdef RGBLIGHT_ENABLE
+          if (record->event.pressed) {
+            enableLEDTypeAnime = false;
+            rgblight_step();
+          }
+      #endif
+      return false;
+    case RGB_TYPE:
+      #ifdef RGBLIGHT_ENABLE
+        if (record->event.pressed) {
+          rgblight_enable_noeeprom();
+          rgblight_mode_noeeprom(1);
+          enableLEDTypeAnime = !enableLEDTypeAnime;
+        }
+      #endif
+      return false;
+    default:
+      break;
+  }
+  #ifdef RGBLIGHT_ENABLE
+    if(enableLEDTypeAnime) {
+      rgblight_mode_noeeprom(1);
+      uint16_t hue = (rgblight_config.hue + 5) % 360;
+      rgblight_sethsv_noeeprom(hue, rgblight_config.sat, rgblight_config.val);
+    }
+  #endif
+    return true;
+}
+
+void matrix_init_user(void) {
+}
diff --git a/keyboards/dm9records/ergoinu/keymaps/default_jis/rules.mk b/keyboards/dm9records/ergoinu/keymaps/default_jis/rules.mk
new file mode 100644
index 000000000..92dde90ff
--- /dev/null
+++ b/keyboards/dm9records/ergoinu/keymaps/default_jis/rules.mk
@@ -0,0 +1,29 @@
+
+# Build Options
+#   change to "no" to disable the options, or define them in the Makefile in
+#   the appropriate keymap folder that will get included automatically
+#
+BOOTMAGIC_ENABLE = no       # Virtual DIP switch configuration(+1000)
+MOUSEKEY_ENABLE = no       # Mouse keys(+4700)
+EXTRAKEY_ENABLE = no       # Audio control and System control(+450)
+CONSOLE_ENABLE = no         # Console for debug(+400)
+COMMAND_ENABLE = no        # Commands for debug and configuration
+NKRO_ENABLE = no            # Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+BACKLIGHT_ENABLE = no      # Enable keyboard backlight functionality
+MIDI_ENABLE = no            # MIDI controls
+AUDIO_ENABLE = no           # Audio output on port C6
+UNICODE_ENABLE = no         # Unicode
+BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
+RGBLIGHT_ENABLE = yes        # Enable WS2812 RGB underlight. 
+SWAP_HANDS_ENABLE = no        # Enable one-hand typing
+
+# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
+SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend
+
+# ergoinu configs
+DISABLE_PROMICRO_LEDs = yes
+
+# Uncomment these for debugging
+# $(info -- RGBLIGHT_ENABLE=$(RGBLIGHT_ENABLE))
+# $(info -- OPT_DEFS=$(OPT_DEFS))
+# $(info )
diff --git a/keyboards/dm9records/ergoinu/matrix.c b/keyboards/dm9records/ergoinu/matrix.c
new file mode 100644
index 000000000..4a80cf9f2
--- /dev/null
+++ b/keyboards/dm9records/ergoinu/matrix.c
@@ -0,0 +1,292 @@
+/*
+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 <avr/io.h>
+#include <avr/wdt.h>
+#include <avr/interrupt.h>
+#include <util/delay.h>
+#include "print.h"
+#include "debug.h"
+#include "util.h"
+#include "matrix.h"
+#include "split_util.h"
+#include "quantum.h"
+
+#include "serial.h"
+
+#ifndef DEBOUNCE
+#  define DEBOUNCE	5
+#endif
+
+#define ERROR_DISCONNECT_COUNT 5
+
+static uint8_t debouncing = DEBOUNCE;
+static const int ROWS_PER_HAND = MATRIX_ROWS/2;
+static uint8_t error_count = 0;
+uint8_t is_master = 0 ;
+
+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_debouncing[MATRIX_ROWS];
+
+static matrix_row_t read_cols(void);
+static void init_cols(void);
+static void unselect_rows(void);
+static void select_row(uint8_t row);
+static uint8_t matrix_master_scan(void);
+
+
+__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) {
+}
+
+inline
+uint8_t matrix_rows(void) {
+  return MATRIX_ROWS;
+}
+
+inline
+uint8_t matrix_cols(void) {
+  return MATRIX_COLS;
+}
+
+void matrix_init(void) {
+  debug_enable = true;
+  debug_matrix = true;
+  debug_mouse = true;
+  // initialize row and col
+  unselect_rows();
+  init_cols();
+
+  setPinOutput(B0);
+  setPinOutput(D5);
+
+  #ifdef DISABLE_PROMICRO_LEDs
+    writePinHigh(B0);
+    writePinHigh(D5);
+  #endif
+
+  // initialize matrix state: all keys off
+  for (uint8_t i=0; i < MATRIX_ROWS; i++) {
+      matrix[i] = 0;
+      matrix_debouncing[i] = 0;
+  }
+
+  is_master = has_usb();
+
+  matrix_init_quantum();
+}
+
+uint8_t _matrix_scan(void) {
+  // Right hand is stored after the left in the matirx so, we need to offset it
+  int offset = isLeftHand ? 0 : (ROWS_PER_HAND);
+
+  for (uint8_t i = 0; i < ROWS_PER_HAND; i++) {
+      select_row(i);
+      _delay_us(30);  // without this wait read unstable value.
+      matrix_row_t cols = read_cols();
+      if (matrix_debouncing[i+offset] != cols) {
+          matrix_debouncing[i+offset] = cols;
+          debouncing = DEBOUNCE;
+      }
+      unselect_rows();
+  }
+
+  if (debouncing) {
+      if (--debouncing) {
+          _delay_ms(1);
+      } else {
+          for (uint8_t i = 0; i < ROWS_PER_HAND; i++) {
+              matrix[i+offset] = matrix_debouncing[i+offset];
+          }
+      }
+  }
+
+  return 1;
+}
+
+int serial_transaction(void) {
+  int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
+  int ret=serial_update_buffers();
+  if (ret ) {
+#ifndef DISABLE_PROMICRO_LEDs
+      if(ret==2) writePinLow(B0);
+#endif
+      return 1;
+  }
+#ifndef DISABLE_PROMICRO_LEDs
+  writePinHigh(B0);
+#endif
+  for (int i = 0; i < ROWS_PER_HAND; ++i) {
+      matrix[slaveOffset+i] = serial_slave_buffer[i];
+  }
+  return 0;
+}
+
+uint8_t matrix_scan(void) {
+  if (is_master) {
+    matrix_master_scan();
+  }else{
+    matrix_slave_scan();
+
+    int offset = (isLeftHand) ? ROWS_PER_HAND : 0;
+
+    for (int i = 0; i < ROWS_PER_HAND; ++i) {
+      matrix[offset+i] = serial_master_buffer[i];
+    }
+
+    matrix_scan_quantum();
+  }
+  return 1;
+}
+
+
+uint8_t matrix_master_scan(void) {
+
+  int ret = _matrix_scan();
+
+  int offset = (isLeftHand) ? 0 : ROWS_PER_HAND;
+
+  for (int i = 0; i < ROWS_PER_HAND; ++i) {
+    serial_master_buffer[i] = matrix[offset+i];
+  }
+
+  if( serial_transaction() ) {
+#ifndef DISABLE_PROMICRO_LEDs
+    // turn on the indicator led when halves are disconnected
+    writePinLow(D5);
+#endif
+
+    error_count++;
+
+    if (error_count > ERROR_DISCONNECT_COUNT) {
+        // reset other half if disconnected
+      int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
+      for (int i = 0; i < ROWS_PER_HAND; ++i) {
+          matrix[slaveOffset+i] = 0;
+      }
+    }
+  } else {
+#ifndef DISABLE_PROMICRO_LEDs
+    // turn off the indicator led on no error
+    writePinHigh(D5);
+#endif
+    error_count = 0;
+  }
+  matrix_scan_quantum();
+  return ret;
+}
+
+void matrix_slave_scan(void) {
+  _matrix_scan();
+
+  int offset = (isLeftHand) ? 0 : ROWS_PER_HAND;
+
+  for (int i = 0; i < ROWS_PER_HAND; ++i) {
+    serial_slave_buffer[i] = matrix[offset+i];
+  }
+}
+
+bool matrix_is_modified(void)
+{
+  if (debouncing) return false;
+  return true;
+}
+
+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("\nr/c 0123456789ABCDEF\n");
+  for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
+    phex(row); print(": ");
+    pbin_reverse16(matrix_get_row(row));
+    print("\n");
+  }
+}
+
+uint8_t matrix_key_count(void)
+{
+  uint8_t count = 0;
+  for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+    count += bitpop16(matrix[i]);
+  }
+  return count;
+}
+
+static void  init_cols(void)
+{
+  for(int x = 0; x < MATRIX_COLS; x++) {
+    _SFR_IO8((col_pins[x] >> 4) + 1) &=  ~_BV(col_pins[x] & 0xF);
+    _SFR_IO8((col_pins[x] >> 4) + 2) |= _BV(col_pins[x] & 0xF);
+  }
+}
+
+static matrix_row_t read_cols(void)
+{
+  matrix_row_t result = 0;
+  for(int x = 0; x < MATRIX_COLS; x++) {
+    result |= (_SFR_IO8(col_pins[x] >> 4) & _BV(col_pins[x] & 0xF)) ? 0 : (1 << x);
+  }
+  return result;
+}
+
+static void unselect_rows(void)
+{
+  for(int x = 0; x < ROWS_PER_HAND; x++) {
+    _SFR_IO8((row_pins[x] >> 4) + 1) &=  ~_BV(row_pins[x] & 0xF);
+    _SFR_IO8((row_pins[x] >> 4) + 2) |= _BV(row_pins[x] & 0xF);
+  }
+}
+
+static void select_row(uint8_t row)
+{
+  _SFR_IO8((row_pins[row] >> 4) + 1) |=  _BV(row_pins[row] & 0xF);
+  _SFR_IO8((row_pins[row] >> 4) + 2) &= ~_BV(row_pins[row] & 0xF);
+}
diff --git a/keyboards/dm9records/ergoinu/readme.md b/keyboards/dm9records/ergoinu/readme.md
new file mode 100644
index 000000000..de0a1c6c9
--- /dev/null
+++ b/keyboards/dm9records/ergoinu/readme.md
@@ -0,0 +1,21 @@
+ErgoInu
+===
+
+![ergoinu](https://i.imgur.com/4CCM8Vl.jpg)
+
+An (Not Portable But Small) Ergonomic Split Keyboard.
+
+Keyboard Maintainer: [hsgw](https://github.com/hsgw/)   [twitter](https://twitter.com/hsgw)  
+Hardware Supported: Pro Micro  
+Hardware Availability & Repository: [https://github.com/hsgw/ergoinu](https://github.com/hsgw/ergoinu)  
+
+Make example for this keyboard (after setting up your build environment):
+
+    make dm9records/ergoinu:default
+
+    (or)
+
+    make dm9records/ergoinu:default_jis
+
+
+See [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) then the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information.
diff --git a/keyboards/dm9records/ergoinu/rules.mk b/keyboards/dm9records/ergoinu/rules.mk
new file mode 100644
index 000000000..493046ffa
--- /dev/null
+++ b/keyboards/dm9records/ergoinu/rules.mk
@@ -0,0 +1,49 @@
+# MCU name
+MCU = atmega32u4
+
+# Bootloader selection
+#   Teensy       halfkay
+#   Pro Micro    caterina
+#   Atmel DFU    atmel-dfu
+#   LUFA DFU     lufa-dfu
+#   QMK DFU      qmk-dfu
+#   ATmega32A    bootloadHID
+#   ATmega328P   USBasp
+BOOTLOADER = caterina
+
+# Build Options
+#   change to "no" to disable the options, or define them in the Makefile in
+#   the appropriate keymap folder that will get included automatically
+#
+BOOTMAGIC_ENABLE = no       # Virtual DIP switch configuration
+MOUSEKEY_ENABLE = no       # Mouse keys
+EXTRAKEY_ENABLE = no       # Audio control and System control
+CONSOLE_ENABLE = no         # Console for debug
+COMMAND_ENABLE = no        # Commands for debug and configuration
+NKRO_ENABLE = no            # Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+BACKLIGHT_ENABLE = no      # Enable keyboard backlight functionality
+MIDI_ENABLE = no            # MIDI controls
+AUDIO_ENABLE = no           # Audio output on port C6
+UNICODE_ENABLE = no         # Unicode
+BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
+RGBLIGHT_ENABLE = no       # Enable WS2812 RGB underlight.
+SUBPROJECT_rev1 = no
+USE_I2C = no               # i2c is not supported
+# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
+SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend
+
+CUSTOM_MATRIX = yes
+SRC += matrix.c serial.c split_util.c
+
+# ergoinu configs
+DISABLE_PROMICRO_LEDs = yes
+
+ifneq ($(strip $(ERGOINU)),)
+  ifeq ($(findstring promicroled, $(ERGOINU)), promicroled)
+    DISABLE_PROMICRO_LEDs = no
+  endif
+endif
+
+ifeq ($(strip $(DISABLE_PROMICRO_LEDs)), yes)
+  OPT_DEFS += -DDISABLE_PROMICRO_LEDs
+endif
diff --git a/keyboards/dm9records/ergoinu/serial.c b/keyboards/dm9records/ergoinu/serial.c
new file mode 100644
index 000000000..591941587
--- /dev/null
+++ b/keyboards/dm9records/ergoinu/serial.c
@@ -0,0 +1,295 @@
+/*
+ * WARNING: be careful changing this code, it is very timing dependent
+ */
+
+#ifndef F_CPU
+#define F_CPU 16000000
+#endif
+
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include <util/delay.h>
+#include <stdbool.h>
+#include "serial.h"
+
+#ifdef USE_SERIAL
+
+#define _delay_sub_us(x)    __builtin_avr_delay_cycles(x)
+
+// Serial pulse period in microseconds.
+#define SELECT_SERIAL_SPEED 1
+#if SELECT_SERIAL_SPEED == 0
+  // Very High speed
+  #define SERIAL_DELAY 4             // micro sec
+  #define READ_WRITE_START_ADJUST 30 // cycles
+  #define READ_WRITE_WIDTH_ADJUST 10 // cycles
+#elif SELECT_SERIAL_SPEED == 1
+  // High speed
+  #define SERIAL_DELAY 6             // micro sec
+  #define READ_WRITE_START_ADJUST 23 // cycles
+  #define READ_WRITE_WIDTH_ADJUST 10 // cycles
+#elif SELECT_SERIAL_SPEED == 2
+  // Middle speed
+  #define SERIAL_DELAY 12            // micro sec
+  #define READ_WRITE_START_ADJUST 25 // cycles
+  #define READ_WRITE_WIDTH_ADJUST 10 // cycles
+#elif SELECT_SERIAL_SPEED == 3
+  // Low speed
+  #define SERIAL_DELAY 24            // micro sec
+  #define READ_WRITE_START_ADJUST 25 // cycles
+  #define READ_WRITE_WIDTH_ADJUST 10 // cycles
+#elif SELECT_SERIAL_SPEED == 4
+  // Very Low speed
+  #define SERIAL_DELAY 50            // micro sec
+  #define READ_WRITE_START_ADJUST 25 // cycles
+  #define READ_WRITE_WIDTH_ADJUST 10 // cycles
+#else
+#error Illegal Serial Speed
+#endif
+
+
+#define SERIAL_DELAY_HALF1 (SERIAL_DELAY/2)
+#define SERIAL_DELAY_HALF2 (SERIAL_DELAY - SERIAL_DELAY/2)
+
+#define SLAVE_INT_WIDTH 1
+#define SLAVE_INT_RESPONSE_TIME SERIAL_DELAY
+
+uint8_t volatile serial_slave_buffer[SERIAL_SLAVE_BUFFER_LENGTH] = {0};
+uint8_t volatile serial_master_buffer[SERIAL_MASTER_BUFFER_LENGTH] = {0};
+
+#define SLAVE_DATA_CORRUPT (1<<0)
+volatile uint8_t status = 0;
+
+inline static
+void serial_delay(void) {
+  _delay_us(SERIAL_DELAY);
+}
+
+inline static
+void serial_delay_half1(void) {
+  _delay_us(SERIAL_DELAY_HALF1);
+}
+
+inline static
+void serial_delay_half2(void) {
+  _delay_us(SERIAL_DELAY_HALF2);
+}
+
+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) {
+  SERIAL_PIN_DDR  &= ~SERIAL_PIN_MASK;
+  SERIAL_PIN_PORT |= SERIAL_PIN_MASK;
+}
+
+inline static
+uint8_t serial_read_pin(void) {
+  return !!(SERIAL_PIN_INPUT & SERIAL_PIN_MASK);
+}
+
+inline static
+void serial_low(void) {
+  SERIAL_PIN_PORT &= ~SERIAL_PIN_MASK;
+}
+
+inline static
+void serial_high(void) {
+  SERIAL_PIN_PORT |= SERIAL_PIN_MASK;
+}
+
+void serial_master_init(void) {
+  serial_output();
+  serial_high();
+}
+
+void serial_slave_init(void) {
+  serial_input_with_pullup();
+
+#if SERIAL_PIN_MASK == _BV(PD0)
+  // Enable INT0
+  EIMSK |= _BV(INT0);
+  // Trigger on falling edge of INT0
+  EICRA &= ~(_BV(ISC00) | _BV(ISC01));
+#elif SERIAL_PIN_MASK == _BV(PD2)
+  // Enable INT2
+  EIMSK |= _BV(INT2);
+  // Trigger on falling edge of INT2
+  EICRA &= ~(_BV(ISC20) | _BV(ISC21));
+#else
+ #error unknown SERIAL_PIN_MASK value
+#endif
+}
+
+// Used by the sender to synchronize timing with the reciver.
+static
+void sync_recv(void) {
+  for (int i = 0; i < SERIAL_DELAY*5 && serial_read_pin(); i++ ) {
+  }
+  // This shouldn't hang if the slave disconnects because the
+  // serial line will float to high if the slave does disconnect.
+  while (!serial_read_pin());
+}
+
+// Used by the reciver to send a synchronization signal to the sender.
+static
+void sync_send(void) {
+  serial_low();
+  serial_delay();
+  serial_high();
+}
+
+// Reads a byte from the serial line
+static
+uint8_t serial_read_byte(void) {
+  uint8_t byte = 0;
+  _delay_sub_us(READ_WRITE_START_ADJUST);
+  for ( uint8_t i = 0; i < 8; ++i) {
+    serial_delay_half1();   // read the middle of pulses
+    byte = (byte << 1) | serial_read_pin();
+    _delay_sub_us(READ_WRITE_WIDTH_ADJUST);
+    serial_delay_half2();
+  }
+  return byte;
+}
+
+// Sends a byte with MSB ordering
+static
+void serial_write_byte(uint8_t data) {
+  uint8_t b = 1<<7;
+  while( b ) {
+    if(data & b) {
+      serial_high();
+    } else {
+      serial_low();
+    }
+    b >>= 1;
+    serial_delay();
+  }
+  serial_low(); // sync_send() / senc_recv() need raise edge
+}
+
+// interrupt handle to be used by the slave device
+ISR(SERIAL_PIN_INTERRUPT) {
+  serial_output();
+
+  // slave send phase
+  uint8_t checksum = 0;
+  for (int i = 0; i < SERIAL_SLAVE_BUFFER_LENGTH; ++i) {
+    sync_send();
+    serial_write_byte(serial_slave_buffer[i]);
+    checksum += serial_slave_buffer[i];
+  }
+  sync_send();
+  serial_write_byte(checksum);
+
+  // slave switch to input
+  sync_send(); //0
+  serial_delay_half1(); //1
+  serial_low();         //2
+  serial_input_with_pullup(); //2
+  serial_delay_half1(); //3
+
+  // slave recive phase
+  uint8_t checksum_computed = 0;
+  for (int i = 0; i < SERIAL_MASTER_BUFFER_LENGTH; ++i) {
+    sync_recv();
+    serial_master_buffer[i] = serial_read_byte();
+    checksum_computed += serial_master_buffer[i];
+  }
+  sync_recv();
+  uint8_t checksum_received = serial_read_byte();
+
+  if ( checksum_computed != checksum_received ) {
+    status |= SLAVE_DATA_CORRUPT;
+  } else {
+    status &= ~SLAVE_DATA_CORRUPT;
+  }
+
+  sync_recv(); //weit master output to high
+}
+
+inline
+bool serial_slave_DATA_CORRUPT(void) {
+  return status & SLAVE_DATA_CORRUPT;
+}
+
+// Copies the serial_slave_buffer to the master and sends the
+// serial_master_buffer to the slave.
+//
+// Returns:
+// 0 => no error
+// 1 => slave did not respond
+// 2 => checksum error
+int serial_update_buffers(void) {
+  // this code is very time dependent, so we need to disable interrupts
+  cli();
+
+  // signal to the slave that we want to start a transaction
+  serial_output();
+  serial_low();
+  _delay_us(SLAVE_INT_WIDTH);
+
+  // wait for the slaves response
+  serial_input_with_pullup();
+  _delay_us(SLAVE_INT_RESPONSE_TIME);
+
+  // check if the slave is present
+  if (serial_read_pin()) {
+    // slave failed to pull the line low, assume not present
+    serial_output();
+    serial_high();
+    sei();
+    return 1;
+  }
+
+  // master recive phase
+  // if the slave is present syncronize with it
+
+  uint8_t checksum_computed = 0;
+  // receive data from the slave
+  for (int i = 0; i < SERIAL_SLAVE_BUFFER_LENGTH; ++i) {
+    sync_recv();
+    serial_slave_buffer[i] = serial_read_byte();
+    checksum_computed += serial_slave_buffer[i];
+  }
+  sync_recv();
+  uint8_t checksum_received = serial_read_byte();
+
+  if (checksum_computed != checksum_received) {
+    serial_output();
+    serial_high();
+    sei();
+    return 2;
+  }
+
+  // master switch to output
+  sync_recv(); //0
+  serial_delay();  //1
+  serial_low();    //3
+  serial_output(); // 3
+  serial_delay_half1(); //4
+
+  // master send phase
+  uint8_t checksum = 0;
+
+  for (int i = 0; i < SERIAL_MASTER_BUFFER_LENGTH; ++i) {
+    sync_send();
+    serial_write_byte(serial_master_buffer[i]);
+    checksum += serial_master_buffer[i];
+  }
+  sync_send();
+  serial_write_byte(checksum);
+
+  // always, release the line when not in use
+  sync_send();
+
+  sei();
+  return 0;
+}
+
+#endif
diff --git a/keyboards/dm9records/ergoinu/serial.h b/keyboards/dm9records/ergoinu/serial.h
new file mode 100644
index 000000000..67cf06ac6
--- /dev/null
+++ b/keyboards/dm9records/ergoinu/serial.h
@@ -0,0 +1,24 @@
+#pragma once
+
+#include <stdbool.h>
+
+// ////////////////////////////////////////////
+// Need Soft Serial defines in serial_config.h
+// ////////////////////////////////////////////
+// ex.
+//  #define SERIAL_PIN_DDR DDRD
+//  #define SERIAL_PIN_PORT PORTD
+//  #define SERIAL_PIN_INPUT PIND
+//  #define SERIAL_PIN_MASK _BV(PD?)   ?=0,2
+//  #define SERIAL_PIN_INTERRUPT INT?_vect  ?=0,2
+//  #define SERIAL_SLAVE_BUFFER_LENGTH MATRIX_ROWS/2
+//  #define SERIAL_MASTER_BUFFER_LENGTH MATRIX_ROWS/2
+
+// Buffers for master - slave communication
+extern volatile uint8_t serial_slave_buffer[SERIAL_SLAVE_BUFFER_LENGTH];
+extern volatile uint8_t serial_master_buffer[SERIAL_MASTER_BUFFER_LENGTH];
+
+void serial_master_init(void);
+void serial_slave_init(void);
+int serial_update_buffers(void);
+bool serial_slave_data_corrupt(void);
diff --git a/keyboards/dm9records/ergoinu/serial_config.h b/keyboards/dm9records/ergoinu/serial_config.h
new file mode 100644
index 000000000..a16db684c
--- /dev/null
+++ b/keyboards/dm9records/ergoinu/serial_config.h
@@ -0,0 +1,11 @@
+#pragma once
+
+/* Soft Serial defines */
+#define SERIAL_PIN_DDR DDRD
+#define SERIAL_PIN_PORT PORTD
+#define SERIAL_PIN_INPUT PIND
+#define SERIAL_PIN_MASK _BV(PD2)
+#define SERIAL_PIN_INTERRUPT INT2_vect
+
+#define SERIAL_SLAVE_BUFFER_LENGTH MATRIX_ROWS/2
+#define SERIAL_MASTER_BUFFER_LENGTH MATRIX_ROWS/2
diff --git a/keyboards/dm9records/ergoinu/split_util.c b/keyboards/dm9records/ergoinu/split_util.c
new file mode 100644
index 000000000..0cbc2c69c
--- /dev/null
+++ b/keyboards/dm9records/ergoinu/split_util.c
@@ -0,0 +1,56 @@
+#include <avr/io.h>
+#include <avr/wdt.h>
+#include <avr/power.h>
+#include <avr/interrupt.h>
+#include <util/delay.h>
+#include <avr/eeprom.h>
+#include "split_util.h"
+#include "matrix.h"
+#include "keyboard.h"
+
+#include "serial.h"
+
+volatile bool isLeftHand = true;
+
+static void setup_handedness(void) {
+  #ifdef EE_HANDS
+    isLeftHand = eeprom_read_byte(EECONFIG_HANDEDNESS);
+  #else
+    // I2C_MASTER_RIGHT is deprecated, use MASTER_RIGHT instead, since this works for both serial and i2c
+    #if defined(I2C_MASTER_RIGHT) || defined(MASTER_RIGHT)
+      isLeftHand = !has_usb();
+    #else
+      isLeftHand = has_usb();
+    #endif
+  #endif
+}
+
+static void keyboard_master_setup(void) {
+  serial_master_init();
+}
+
+static void keyboard_slave_setup(void) {
+  serial_slave_init();
+}
+
+bool has_usb(void) {
+   USBCON |= (1 << OTGPADE); //enables VBUS pad
+   _delay_us(5);
+   return (USBSTA & (1<<VBUS));  //checks state of VBUS
+}
+
+void split_keyboard_setup(void) {
+   setup_handedness();
+
+   if (has_usb()) {
+      keyboard_master_setup();
+   } else {
+      keyboard_slave_setup();
+   }
+   sei();
+}
+
+// this code runs before the usb and keyboard is initialized
+void matrix_setup(void) {
+    split_keyboard_setup();
+}
diff --git a/keyboards/dm9records/ergoinu/split_util.h b/keyboards/dm9records/ergoinu/split_util.h
new file mode 100644
index 000000000..11cfd5455
--- /dev/null
+++ b/keyboards/dm9records/ergoinu/split_util.h
@@ -0,0 +1,12 @@
+#pragma once
+
+#include <stdbool.h>
+#include "eeconfig.h"
+
+extern volatile bool isLeftHand;
+
+// slave version of matix scan, defined in matrix.c
+void matrix_slave_scan(void);
+
+void split_keyboard_setup(void);
+bool has_usb(void);