Add support for the crkbd r2g by mechboards (#15283)

* r2g folder groundwork

* Default mb keymap featuring mb logos

* Migrate Oled to keyboard folder

* Move rules configs to support config better

* update readmes

* Liscnece update

* Update config and fix issues caused by redef errs

* funciton name adjusts, define specific rgb modes

* move default oled font to postconfig

* update oled in line with develop merge

* fix return value

* Add some default rgb matrix defines

* del ugfx

* remove #include <stdio.h>

5 files changed, 415 insertions, 0 deletions

diff --git a/keyboards/crkbd/r2g/config.h b/keyboards/crkbd/r2g/config.h
new file mode 100644
index 0000000000..e451612484
--- /dev/null
+++ b/keyboards/crkbd/r2g/config.h
@@ -0,0 +1,78 @@
+/*
+Copyright 2019 @foostan
+Copyright 2020 Drashna Jaelre <@drashna>
+Copyright 2021 Elliot Powell @e11i0t23
+
+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 USE_SERIAL
+#define SOFT_SERIAL_PIN D2
+
+/* ws2812 RGB LED */
+#define RGB_DI_PIN      D3
+
+#ifdef RGBLIGHT_ENABLE
+
+#   define RGBLIGHT_EFFECT_BREATHING
+#   define RGBLIGHT_EFFECT_RAINBOW_MOOD
+#   define RGBLIGHT_EFFECT_RAINBOW_SWIRL
+#   define RGBLIGHT_EFFECT_SNAKE
+#   define RGBLIGHT_EFFECT_KNIGHT
+#   define RGBLIGHT_EFFECT_CHRISTMAS
+#   define RGBLIGHT_EFFECT_STATIC_GRADIENT
+#   define RGBLIGHT_EFFECT_RGB_TEST
+#   define RGBLIGHT_EFFECT_ALTERNATING
+#   define RGBLIGHT_EFFECT_TWINKLE
+
+#   define RGBLED_NUM 54
+#   define RGBLED_SPLIT \
+        { 27, 27 }
+#endif
+
+#ifdef RGB_MATRIX_ENABLE
+#    define RGBLED_NUM       54 // Number of LEDs
+#    define DRIVER_LED_TOTAL RGBLED_NUM
+#    define RGB_MATRIX_SPLIT \
+        { 27, 27 }
+#    define SPLIT_TRANSPORT_MIRROR
+
+#   define ENABLE_RGB_MATRIX_ALPHAS_MODS
+#   define ENABLE_RGB_MATRIX_GRADIENT_UP_DOWN
+#   define ENABLE_RGB_MATRIX_GRADIENT_LEFT_RIGHT
+#   define ENABLE_RGB_MATRIX_BREATHING
+#   define ENABLE_RGB_MATRIX_BAND_SAT
+#   define ENABLE_RGB_MATRIX_BAND_VAL
+#   define ENABLE_RGB_MATRIX_BAND_SPIRAL_SAT
+#   define ENABLE_RGB_MATRIX_BAND_SPIRAL_VAL
+#   define ENABLE_RGB_MATRIX_CYCLE_ALL
+#   define ENABLE_RGB_MATRIX_RAINBOW_MOVING_CHEVRON
+#   define ENABLE_RGB_MATRIX_CYCLE_SPIRAL
+#   define ENABLE_RGB_MATRIX_RAINDROPS
+#   define ENABLE_RGB_MATRIX_HUE_BREATHING
+#   define ENABLE_RGB_MATRIX_PIXEL_FRACTAL
+#   define ENABLE_RGB_MATRIX_TYPING_HEATMAP
+#   define ENABLE_RGB_MATRIX_SOLID_REACTIVE_SIMPLE
+#   define ENABLE_RGB_MATRIX_SOLID_REACTIVE
+#   define ENABLE_RGB_MATRIX_SOLID_REACTIVE_MULTINEXUS
+#   define ENABLE_RGB_MATRIX_SPLASH
+#   define ENABLE_RGB_MATRIX_SOLID_SPLASH
+#endif
+
+#define DIODE_DIRECTION COL2ROW
+
+#define SPLIT_USB_DETECT
+
diff --git a/keyboards/crkbd/r2g/r2g.c b/keyboards/crkbd/r2g/r2g.c
new file mode 100644
index 0000000000..7fb95c043c
--- /dev/null
+++ b/keyboards/crkbd/r2g/r2g.c
@@ -0,0 +1,240 @@
+/*
+Copyright 2019 @foostan
+Copyright 2020 Drashna Jaelre <@drashna>
+Copyright 2021 Elliot Powell @e11i0t23
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#include "r2g.h"
+
+#ifdef RGB_MATRIX_ENABLE
+
+  // Logical Layout
+  // Columns
+  // Left
+  // 0  1  2  3  4  5
+  //                   ROWS
+  // 25 24 19 18 11 10   0
+  //    03    02    01
+  // 26 23 20 17 12 09   1
+  //    04    05    06
+  // 27 22 21 16 13 08   2
+  //
+  //          15 14 07   3
+  //
+  // Right
+  // 0  1  2  3  4  5
+  //                    ROWS
+  // 25 24 19 18 11 10   4
+  //    03    02    01
+  // 26 23 20 17 12 09   5
+  //    04    05    06
+  // 27 22 21 16 13 08   6
+  //
+  //          15 14 07   7
+  //
+  // Physical Layout
+  // Columns
+  // 0  1  2  3  4  5  6  7  8  9  10 11 12 13
+  //                                           ROWS
+  // 25 24 19 18 11 10       10 11 18 19 24 25  0
+  //    03    02    01       01    02    03
+  // 26 23 20 17 12 09       09 12 17 20 23 26  1
+  //    04                               04
+  // 27 22 21 16 13 08       08 13 16 21 22 27  2
+  //          05    06       06    05
+  //           15 14 07     07 14 15              3
+
+led_config_t g_led_config = { {
+    {  24,  23,  18,  17,  10,   9 },
+    {  25,  22,  19,  16,  11,   8 },
+    {  26,  21,  20,  15,  12,   7 },
+    { NO_LED, NO_LED, NO_LED,  14,  13,   6 },
+    {  51,  50,  45,  44,  37,  36 },
+    {  52,  49,  46,  43,  38,  35 },
+    {  53,  48,  47,  42,  39,  34 },
+    { NO_LED, NO_LED, NO_LED,  41,  40,  33 }
+}, {
+    {  85,  16 }, {  50,  13 }, {  16,  20 }, {  16,  38 }, {  50,  48 }, {  85,  52 }, {  95,  63 },
+    {  85,  39 }, {  85,  21 }, {  85,   4 }, {  68,   2 }, {  68,  19 }, {  68,  37 }, {  80,  58 },
+    {  60,  55 }, {  50,  35 }, {  50,  13 }, {  50,   0 }, {  33,   3 }, {  33,  20 }, {  33,  37 },
+    {  16,  42 }, {  16,  24 }, {  16,   7 }, {   0,   7 }, {   0,  24 }, {   0,  41 }, { 139,  16 },
+    { 174,  13 }, { 208,  20 }, { 208,  38 }, { 174,  48 }, { 139,  52 }, { 129,  63 }, { 139,  39 },
+    { 139,  21 }, { 139,   4 }, { 156,   2 }, { 156,  19 }, { 156,  37 }, { 144,  58 }, { 164,  55 },
+    { 174,  35 }, { 174,  13 }, { 174,   0 }, { 191,   3 }, { 191,  20 }, { 191,  37 }, { 208,  42 },
+    { 208,  24 }, { 208,   7 }, { 224,   7 }, { 224,  24 }, { 224,  41 }
+}, {
+    2, 2, 2, 2, 2, 2, 1,
+    4, 4, 4, 4, 4, 4, 1,
+    1, 4, 4, 4, 4, 4, 4,
+    4, 4, 4, 1, 1, 1, 2,
+    2, 2, 2, 2, 2, 1, 4,
+    4, 4, 4, 4, 4, 1, 1,
+    4, 4, 4, 4, 4, 4, 4,
+    4, 4, 1, 1, 1
+} };
+
+#endif
+
+#ifdef OLED_ENABLE
+
+oled_rotation_t oled_init_kb(oled_rotation_t rotation) {
+  if (!is_keyboard_master()) {
+    return OLED_ROTATION_180;  // flips the display 180 degrees if offhand
+  }
+  return rotation;
+}
+
+enum Layers{
+    L_BASE, L_LOWER, L_RAISE, L_ADJUST
+};
+
+void oled_render_layer_state_r2g(void) {
+    oled_write_P(PSTR("Layer: "), false);
+    switch (get_highest_layer(layer_state)) {
+        case L_BASE:
+            oled_write_ln_P(PSTR("Default"), false);
+            break;
+        case L_LOWER:
+            oled_write_ln_P(PSTR("Lower"), false);
+            break;
+        case L_RAISE:
+            oled_write_ln_P(PSTR("Raise"), false);
+            break;
+        case L_ADJUST:
+            oled_write_ln_P(PSTR("Adjust"), false);
+            break;
+    }
+}
+
+//char keylog_str_r2g[24] = {};
+
+const char code_to_name_r2g[60] = {
+    ' ', ' ', ' ', ' ', 'a', 'b', 'c', 'd', 'e', 'f',
+    'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p',
+    'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
+    '1', '2', '3', '4', '5', '6', '7', '8', '9', '0',
+    'R', 'E', 'B', 'T', '_', '-', '=', '[', ']', '\\',
+    '#', ';', '\'', '`', ',', '.', '/', ' ', ' ', ' '};
+
+char key_name_r2g = ' ';
+uint16_t last_keycode_r2g;
+uint8_t last_row_r2g;
+uint8_t last_col_r2g;
+
+void set_keylog_r2g(uint16_t keycode, keyrecord_t *record) {
+    key_name_r2g = ' ';
+    last_keycode_r2g = keycode;
+    if ((keycode >= QK_MOD_TAP && keycode <= QK_MOD_TAP_MAX) ||
+        (keycode >= QK_LAYER_TAP && keycode <= QK_LAYER_TAP_MAX)) { last_keycode_r2g = keycode & 0xFF; }
+    if (keycode < 60) {
+      key_name_r2g = code_to_name_r2g[keycode];
+    }
+    last_row_r2g = record->event.key.row;
+    last_col_r2g = record->event.key.col;
+}
+
+const char *depad_str(const char *depad_str, char depad_char) {
+    while (*depad_str == depad_char) ++depad_str;
+    return depad_str;
+}
+
+void oled_render_keylog_r2g(void) {
+    //oled_write(keylog_str_r2g, false);
+    const char *last_row_r2g_str = get_u8_str(last_row_r2g, ' ');
+    oled_write(depad_str(last_row_r2g_str, ' '), false);
+    oled_write_P(PSTR("x"), false);
+    const char *last_col_r2g_str = get_u8_str(last_col_r2g, ' ');
+    oled_write(depad_str(last_col_r2g_str, ' '), false);
+    oled_write_P(PSTR(", k"), false);
+    const char *last_keycode_r2g_str = get_u16_str(last_keycode_r2g, ' ');
+    oled_write(depad_str(last_keycode_r2g_str, ' '), false);
+    oled_write_P(PSTR(":"), false);
+    oled_write_char(key_name_r2g, false);
+}
+
+void render_bootmagic_status_r2g(bool status) {
+    /* Show Ctrl-Gui Swap options */
+    static const char PROGMEM logo[][2][3] = {
+        {{0x97, 0x98, 0}, {0xb7, 0xb8, 0}},
+        {{0x95, 0x96, 0}, {0xb5, 0xb6, 0}},
+    };
+    if (status) {
+        oled_write_ln_P(logo[0][0], false);
+        oled_write_ln_P(logo[0][1], false);
+    } else {
+        oled_write_ln_P(logo[1][0], false);
+        oled_write_ln_P(logo[1][1], false);
+    }
+}
+
+void oled_render_logo_r2g(void) {
+    static const char PROGMEM mb_logo[] = {
+0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x0f, 0x0f, 0x0f, 0x0f,
+0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+0xff, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0x83, 0x83, 0x83, 0x83, 0x83, 0xff, 0xff,
+0x83, 0x83, 0x83, 0x83, 0xff, 0xff, 0x83, 0x83, 0x83, 0x83, 0x83, 0xff, 0xff, 0x83, 0x83, 0x83,
+0x83, 0xff, 0xff, 0x83, 0x83, 0x83, 0x83, 0x83, 0xff, 0xff, 0xff, 0xff, 0x82, 0x82, 0x82, 0x82,
+0x82, 0xff, 0xff, 0x83, 0x83, 0x83, 0x83, 0xff, 0xff, 0x83, 0x83, 0x83, 0x83, 0x83, 0xff, 0xff,
+0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8, 0xfc, 0xfc, 0xfc,
+0x9c, 0x9c, 0xfc, 0xfc, 0xf8, 0xf8, 0x70, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x78, 0x7c, 0x3c,
+0x9c, 0xfc, 0xfc, 0xf8, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc0, 0xf0, 0xf8, 0xf8, 0x3c, 0x3c,
+0x9c, 0xbc, 0xfc, 0xb8, 0xb8, 0xa0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0x41, 0x41, 0x41, 0x41, 0x41, 0xff, 0xff,
+0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x41, 0x41, 0x41, 0x41, 0x41, 0xff, 0xff, 0xff, 0xff, 0xff,
+0xff, 0xff, 0xff, 0x41, 0x41, 0x41, 0x41, 0x41, 0xff, 0xff, 0xff, 0xff, 0x41, 0x41, 0x41, 0x41,
+0x41, 0xff, 0xff, 0x7f, 0x7f, 0x7f, 0x7f, 0xff, 0xff, 0x41, 0x41, 0x41, 0x41, 0x41, 0xff, 0xff,
+0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3f, 0x3f, 0x3f, 0x3f,
+0x03, 0x07, 0x0f, 0x3f, 0x3f, 0x3e, 0x38, 0x20, 0x00, 0x00, 0x00, 0x00, 0x38, 0x3c, 0x3e, 0x3f,
+0x3f, 0x3f, 0x3b, 0x39, 0x38, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0x0f, 0x1f, 0x3f, 0x3c, 0x38,
+0x3b, 0x3b, 0x3f, 0x1f, 0x1f, 0x0f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+0x00, 0x00, 0x00, 0x00, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xff, 0xff,
+0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xff, 0xff, 0xff, 0xff, 0xff,
+0xff, 0xff, 0xff, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf0, 0xf0, 0xf0,
+0xf0, 0xff, 0xff, 0xf0, 0xf0, 0xf0, 0xf0, 0xff, 0xff, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xff, 0xff,
+0xff, 0x7f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+};
+    oled_write_raw_P(mb_logo, sizeof(mb_logo));
+    //oled_set_cursor(oled_max_chars()/2,oled_max_lines()/2);
+    //oled_write_P(PSTR("R2G"), false);
+}
+
+bool oled_task_kb(void) {
+    if (!oled_task_user()) { return false; }
+    if (is_keyboard_master()) {
+        oled_render_layer_state_r2g();
+        oled_render_keylog_r2g();
+    } else {
+        oled_render_logo_r2g();
+    }
+    return false;
+}
+
+bool process_record_kb(uint16_t keycode, keyrecord_t *record) {
+  if (record->event.pressed) {
+    set_keylog_r2g(keycode, record);
+  }
+  return process_record_user(keycode, record);
+}
+#endif // OLED_ENABLE
+
diff --git a/keyboards/crkbd/r2g/r2g.h b/keyboards/crkbd/r2g/r2g.h
new file mode 100644
index 0000000000..126c4b8998
--- /dev/null
+++ b/keyboards/crkbd/r2g/r2g.h
@@ -0,0 +1,60 @@
+/*
+Copyright 2019 @foostan
+Copyright 2020 Drashna Jaelre <@drashna>
+
+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 "crkbd.h"
+#include "quantum.h"
+
+// clang-format off
+#define LAYOUT_split_3x6_3( \
+  L00, L01, L02, L03, L04, L05,           R00, R01, R02, R03, R04, R05, \
+  L10, L11, L12, L13, L14, L15,           R10, R11, R12, R13, R14, R15, \
+  L20, L21, L22, L23, L24, L25,           R20, R21, R22, R23, R24, R25, \
+                      L30, L31, L32, R30, R31, R32 \
+  ) \
+  { \
+    { L00, L01, L02, L03, L04, L05 }, \
+    { L10, L11, L12, L13, L14, L15 }, \
+    { L20, L21, L22, L23, L24, L25 }, \
+    { KC_NO, KC_NO, KC_NO, L30, L31, L32 }, \
+    { R05, R04, R03, R02, R01, R00 }, \
+    { R15, R14, R13, R12, R11, R10 }, \
+    { R25, R24, R23, R22, R21, R20 }, \
+    { KC_NO, KC_NO, KC_NO, R32, R31, R30 } \
+  }
+
+#define LAYOUT_split_3x5_3( \
+  L00, L01, L02, L03, L04,           R00, R01, R02, R03, R04, \
+  L10, L11, L12, L13, L14,           R10, R11, R12, R13, R14, \
+  L20, L21, L22, L23, L24,           R20, R21, R22, R23, R24, \
+                 L30, L31, L32, R30, R31, R32 \
+  ) \
+  { \
+    { KC_NO, L00, L01, L02, L03, L04 }, \
+    { KC_NO, L10, L11, L12, L13, L14 }, \
+    { KC_NO, L20, L21, L22, L23, L24 }, \
+    { KC_NO, KC_NO, KC_NO, L30, L31, L32 }, \
+    { KC_NO, R04, R03, R02, R01, R00 }, \
+    { KC_NO, R14, R13, R12, R11, R10 }, \
+    { KC_NO, R24, R23, R22, R21, R20 }, \
+    { KC_NO, KC_NO, KC_NO, R32, R31, R30 } \
+  }
+
+
+#define LAYOUT LAYOUT_split_3x6_3
diff --git a/keyboards/crkbd/r2g/readme.md b/keyboards/crkbd/r2g/readme.md
new file mode 100644
index 0000000000..7a9db3845d
--- /dev/null
+++ b/keyboards/crkbd/r2g/readme.md
@@ -0,0 +1,28 @@
+# Corne R2G
+
+![r2g](https://cdn.shopify.com/s/files/1/0582/0242/3501/products/HelidoxCorneR2GPCB_1800x1800.png)
+
+An Eddition of the popular CRKBD featuring a full smd assembly
+
+Keyboard Maintainer: [e11i0t23](https://github.com/e11i0t23/), [Mechboards UK](https://mechboards.co.uk)  
+Hardware Supported: CRKBD R2G PCB   
+Hardware Availability: [Mechboards UK](https://mechboards.co.uk/products/helidox-corne-kit?variant=40391708213453)  
+
+Make example for this keyboard (after setting up your build environment):
+
+```sh
+make crkbd/r2g:mb_via
+```
+
+Flash example for this keyboard:  
+```sh
+qmk flash -kb crkbd/r2g -km mb_via
+```
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
+
+## Bootloader
+
+These PCBs have a reset on the underside of the PCB next to the TRRS jack to enter in to the bootloader.
+
+Additionally, if you hold down the "Q" or "P" buttons when plugging in that half of the keyboard (per the default QWERTY layout), this will jump to the bootloader and reset the EEPROM (persistent storage).  
diff --git a/keyboards/crkbd/r2g/rules.mk b/keyboards/crkbd/r2g/rules.mk
new file mode 100644
index 0000000000..a3ee1b46b3
--- /dev/null
+++ b/keyboards/crkbd/r2g/rules.mk
@@ -0,0 +1,9 @@
+BOOTLOADER      = atmel-dfu
+OLED_ENABLE     = yes
+OLED_DRIVER     = SSD1306
+LTO_ENABLE      = yes
+RGBLIGHT_ENABLE = yes
+
+
+SPLIT_KEYBOARD = yes
+