[Keyboard] add leftover30 by marksard (#10140)

* Keyboard: add treeadstone48

* rename layout defines

* Use of pragma once

* move common include code

* fixed info.json

* change keymap layout from kc to normal

* fix alpha revision keymap

* fixed info.json

* remove USE_Link_Time_Optimization

* Add keyboard leftover30

* update keymap

* Update keyboards/marksard/leftover30/config.h

I guess I was mistaken. Thank you.

* Update keyboards/marksard/leftover30/keymaps/default/keymap.c

* Update keyboards/marksard/leftover30/leftover30.c

* Update keyboards/marksard/leftover30/keymaps/default/keymap.c

* Update keyboards/marksard/leftover30/keymaps/default/keymap.c

* Update keyboards/marksard/leftover30/keymaps/default/keymap.c

* Update keyboards/marksard/leftover30/keymaps/default/keymap.c

* Update keyboards/marksard/leftover30/keymaps/default/keymap.c

* Update keyboards/marksard/leftover30/keymaps/default/keymap.c

* Update keyboards/marksard/leftover30/keymaps/default/keymap.c

* Update keyboards/marksard/leftover30/keymaps/default/keymap.c

* Update keyboards/marksard/leftover30/keymaps/default/keymap.c

* changed user led custom method

* Update keyboards/marksard/leftover30/config.h

* Update keyboards/marksard/leftover30/config.h

* Update keyboards/marksard/leftover30/keymaps/default/rules.mk

* Update keyboards/marksard/leftover30/rules.mk

* Update from other review

* Update keyboards/marksard/leftover30/readme.md

* fixed kanji key procedure

* Update keyboards/marksard/leftover30/config.h

* Update keyboards/marksard/leftover30/config.h

* Update keyboards/marksard/leftover30/config.h

* fixed by review

10 files changed, 645 insertions, 0 deletions

diff --git a/keyboards/marksard/leftover30/config.h b/keyboards/marksard/leftover30/config.h
new file mode 100644
index 0000000000..42c6c62872
--- /dev/null
+++ b/keyboards/marksard/leftover30/config.h
@@ -0,0 +1,138 @@
+/*
+Copyright 2020 marksard
+
+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"
+
+/* USB Device descriptor parameter */
+#define VENDOR_ID 0xFEED
+#define PRODUCT_ID 0xDFA8
+#define DEVICE_VER 0x0001
+#define MANUFACTURER marksard
+#define PRODUCT leftover30
+
+/* Encoder */
+#define ENCODERS_PAD_A { F4 }
+#define ENCODERS_PAD_B { F5 }
+// #define ENCODER_DIRECTION_FLIP
+
+/* key matrix size */
+#define MATRIX_ROWS 8
+#define MATRIX_COLS 5
+
+/*
+ * Keyboard Matrix Assignments
+ *
+ * Change this to how you wired your keyboard
+ * COLS: AVR pins used for columns, left to right
+ * ROWS: AVR pins used for rows, top to bottom
+ * DIODE_DIRECTION: COL2ROW = COL = Anode (+), ROW = Cathode (-, marked on diode)
+ *                  ROW2COL = ROW = Anode (+), COL = Cathode (-, marked on diode)
+ *
+ */
+#define MATRIX_ROW_PINS { B6, B2, F7, F6, B3, B1, D4, D0 }
+#define MATRIX_COL_PINS { B5, B4, E6, D7, C6 }
+#define UNUSED_PINS
+
+/* COL2ROW, ROW2COL*/
+#define DIODE_DIRECTION COL2ROW
+
+#define RGB_DI_PIN D3
+#ifdef RGB_DI_PIN
+  #define RGBLED_NUM 6
+  #define RGBLIGHT_HUE_STEP 8
+  #define RGBLIGHT_SAT_STEP 8
+  #define RGBLIGHT_VAL_STEP 8
+  #define RGBLIGHT_LIMIT_VAL 255 /* The maximum brightness level */
+  #define RGBLIGHT_SLEEP  /* If defined, the RGB lighting will be switched off when the host goes to sleep */
+/*== all animations enable ==*/
+  #define RGBLIGHT_ANIMATIONS
+/*== or choose animations ==*/
+//   #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
+/*== customize breathing effect ==*/
+  /*==== (DEFAULT) use fixed table instead of exp() and sin() ====*/
+  #define RGBLIGHT_BREATHE_TABLE_SIZE 256      // 256(default) or 128 or 64
+  /*==== use exp() and sin() ====*/
+  #define RGBLIGHT_EFFECT_BREATHE_CENTER 1.85  // 1 to 2.7
+  #define RGBLIGHT_EFFECT_BREATHE_MAX    255   // 0 to 255
+#endif
+
+/* Debounce reduces chatter (unintended double-presses) - set 0 if debouncing is not needed */
+#define DEBOUNCE 5
+
+/* define if matrix has ghost (lacks anti-ghosting diodes) */
+//#define MATRIX_HAS_GHOST
+
+/* 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
+
+/* If defined, GRAVE_ESC will always act as ESC when CTRL is held.
+ * This is userful for the Windows task manager shortcut (ctrl+shift+esc).
+ */
+// #define GRAVE_ESC_CTRL_OVERRIDE
+
+/*
+ * Force NKRO
+ *
+ * Force NKRO (nKey Rollover) to be enabled by default, regardless of the saved
+ * state in the bootmagic EEPROM settings. (Note that NKRO must be enabled in the
+ * makefile for this to work.)
+ *
+ * If forced on, NKRO can be disabled via magic key (default = LShift+RShift+N)
+ * until the next keyboard reset.
+ *
+ * NKRO may prevent your keystrokes from being detected in the BIOS, but it is
+ * fully operational during normal computer usage.
+ *
+ * For a less heavy-handed approach, enable NKRO via magic key (LShift+RShift+N)
+ * or via bootmagic (hold SPACE+N while plugging in the keyboard). Once set by
+ * bootmagic, NKRO mode will always be enabled until it is toggled again during a
+ * power-up.
+ *
+ */
+//#define FORCE_NKRO
+
+/*
+ * 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
+
+/* disable these deprecated features by default */
+#define NO_ACTION_MACRO
+#define NO_ACTION_FUNCTION
diff --git a/keyboards/marksard/leftover30/info.json b/keyboards/marksard/leftover30/info.json
new file mode 100644
index 0000000000..700d08d9d3
--- /dev/null
+++ b/keyboards/marksard/leftover30/info.json
@@ -0,0 +1,198 @@
+{
+    "keyboard_name": "Leftover30",
+    "url": "https://github.com/marksard/Keyboards",
+    "maintainer": "marksard",
+    "width": 11.5,
+    "height": 4,
+    "layouts": {
+        "LAYOUT": {
+            "layout": [
+                {
+                    "label": "Q",
+                    "x": 0.5,
+                    "y": 0
+                },
+                {
+                    "label": "W",
+                    "x": 1.5,
+                    "y": 0
+                },
+                {
+                    "label": "E",
+                    "x": 2.5,
+                    "y": 0
+                },
+                {
+                    "label": "R",
+                    "x": 3.5,
+                    "y": 0
+                },
+                {
+                    "label": "T",
+                    "x": 4.5,
+                    "y": 0
+                },
+                {
+                    "label": "Y",
+                    "x": 5.5,
+                    "y": 0
+                },
+                {
+                    "label": "U",
+                    "x": 6.5,
+                    "y": 0
+                },
+                {
+                    "label": "I",
+                    "x": 7.5,
+                    "y": 0
+                },
+                {
+                    "label": "O",
+                    "x": 8.5,
+                    "y": 0
+                },
+                {
+                    "label": "P",
+                    "x": 9.5,
+                    "y": 0
+                },
+                {
+                    "label": "BS",
+                    "x": 10.5,
+                    "y": 0
+                },
+                {
+                    "label": "A",
+                    "x": 0.75,
+                    "y": 1
+                },
+                {
+                    "label": "S",
+                    "x": 1.75,
+                    "y": 1
+                },
+                {
+                    "label": "D",
+                    "x": 2.75,
+                    "y": 1
+                },
+                {
+                    "label": "F",
+                    "x": 3.75,
+                    "y": 1
+                },
+                {
+                    "label": "G",
+                    "x": 4.75,
+                    "y": 1
+                },
+                {
+                    "label": "H",
+                    "x": 5.75,
+                    "y": 1
+                },
+                {
+                    "label": "J",
+                    "x": 6.75,
+                    "y": 1
+                },
+                {
+                    "label": "K",
+                    "x": 7.75,
+                    "y": 1
+                },
+                {
+                    "label": "L",
+                    "x": 8.75,
+                    "y": 1
+                },
+                {
+                    "label": "Enter",
+                    "x": 9.75,
+                    "y": 1,
+                    "w": 1.75
+                },
+                {
+                    "label": "Z",
+                    "x": 1.25,
+                    "y": 2
+                },
+                {
+                    "label": "X",
+                    "x": 2.25,
+                    "y": 2
+                },
+                {
+                    "label": "C",
+                    "x": 3.25,
+                    "y": 2
+                },
+                {
+                    "label": "V",
+                    "x": 4.25,
+                    "y": 2
+                },
+                {
+                    "label": "B",
+                    "x": 5.25,
+                    "y": 2
+                },
+                {
+                    "label": "N",
+                    "x": 6.25,
+                    "y": 2
+                },
+                {
+                    "label": "M",
+                    "x": 7.25,
+                    "y": 2
+                },
+                {
+                    "label": "<",
+                    "x": 8.25,
+                    "y": 2
+                },
+                {
+                    "label": ">",
+                    "x": 9.25,
+                    "y": 2
+                },
+                {
+                    "label": "?",
+                    "x": 10.25,
+                    "y": 2,
+                    "w": 1.25
+                },
+                {
+                    "label": "",
+                    "x": 0,
+                    "y": 3
+                },
+                {
+                    "label": "Alt",
+                    "x": 1.5,
+                    "y": 3,
+                    "w": 1.25
+                },
+                {
+                    "label": "",
+                    "x": 2.75,
+                    "y": 3,
+                    "w": 6.25
+                },
+                {
+                    "label": "Fn1",
+                    "x": 9,
+                    "y": 3
+                },
+                {
+                    "label": "Ctrl",
+                    "x": 10,
+                    "y": 3,
+                    "w": 1.5
+                }
+            ]
+        }
+    }
+}
diff --git a/keyboards/marksard/leftover30/keymaps/default/config.h b/keyboards/marksard/leftover30/keymaps/default/config.h
new file mode 100644
index 0000000000..8bffbbb3b5
--- /dev/null
+++ b/keyboards/marksard/leftover30/keymaps/default/config.h
@@ -0,0 +1,24 @@
+/* Copyright 2020 marksard
+ *
+ * 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
+
+// place overrides here
+#define TAPPING_TERM 200
+#define IGNORE_MOD_TAP_INTERRUPT
+
+#define TAPPING_LAYER_TERM 150 // Custom LT Tapping term
+#define TAPPING_TERM_PER_KEY
diff --git a/keyboards/marksard/leftover30/keymaps/default/keymap.c b/keyboards/marksard/leftover30/keymaps/default/keymap.c
new file mode 100644
index 0000000000..60751cd1ca
--- /dev/null
+++ b/keyboards/marksard/leftover30/keymaps/default/keymap.c
@@ -0,0 +1,162 @@
+/* Copyright 2020 marksard
+ *
+ * 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 QMK_KEYBOARD_H
+
+enum layer_number {
+    _BASE,
+    _LOWER,
+    _RAISE,
+    _ADJUST,
+};
+
+enum custom_keycodes {
+    RGBRST = SAFE_RANGE,
+    LOWER,
+    RAISE,
+    KANJI,
+};
+
+// #define KC_ESAD  LT(_ADJUST, KC_ESC)
+// #define KC_BSLO  LT(_LOWER, KC_BSPC)
+#define KC_LOWR  MO(_LOWER)
+#define KC_SPRA  LT(_RAISE, KC_SPC)
+#define KC_AJST  MO(_ADJUST)
+
+#define KC_Q_AL  LALT_T(KC_Q)
+#define KC_A_CT  LCTL_T(KC_A)
+#define KC_Z_SF  LSFT_T(KC_Z)
+#define KC_X_AL  LALT_T(KC_X)
+#define KC_ENSF  RSFT_T(KC_ENT)
+#define KC_SLSF  RSFT_T(KC_SLSH)
+
+#define KC_F1AL  LALT_T(KC_F1)
+#define KC_F6CT  LCTL_T(KC_F6)
+#define KC_11SF  LSFT_T(KC_F11)
+#define KC_12AL  LALT_T(KC_F12)
+#define KC_QUSF  RCTL_T(KC_QUOT)
+#define KC_ROSF  RSFT_T(KC_RO)
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+  [_BASE] = LAYOUT_all(
+  //,-----------------------------------------------------------------------------------------------------------.
+               KC_Q_AL,    KC_W,    KC_E,    KC_R,    KC_T,    KC_Y,    KC_U,    KC_I,    KC_O,    KC_P, KC_BSPC,
+  //|--------+--------+--------+--------+--------+--------|--------+--------+--------+--------+--------+--------|
+               KC_A_CT,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,     KC_ENSF,
+  //|--------+--------+--------+--------+--------+--------|--------+--------+--------+--------+--------+--------|
+               KC_Z_SF, KC_X_AL,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M, KC_COMM,  KC_DOT,     KC_SLSF,
+  //|--------+--------+--------+--------+--------+--------|--------+--------+--------+--------+--------+--------|
+      KC_LCTL, KC_LGUI,                                KC_SPRA,                                 KC_LOWR, KC_RCTL
+  //`-----------------------------------------------------------------------------------------------------------'
+  ),
+
+  [_LOWER] = LAYOUT_all(
+  //,-----------------------------------------------------------------------------------------------------------.
+               KC_F1AL,   KC_F2,   KC_F3,   KC_F4,   KC_F5, KC_MINS,  KC_EQL, KC_JYEN, KC_LBRC, KC_RBRC, KC_BSLS,
+  //|--------+--------+--------+--------+--------+--------|--------+--------+--------+--------+--------+--------|
+               KC_F6CT,   KC_F7,   KC_F8,   KC_F9,  KC_F10, XXXXXXX, XXXXXXX, XXXXXXX, KC_SCLN,     KC_QUSF,
+  //|--------+--------+--------+--------+--------+--------|--------+--------+--------+--------+--------+--------|
+               KC_11SF, KC_12AL, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,  KC_GRV,   KC_RO, KC_SLSH,     KC_ROSF,
+  //|--------+--------+--------+--------+--------+--------|--------+--------+--------+--------+--------+--------|
+      _______, _______,                                KC_AJST,                                 _______, _______
+  //`-----------------------------------------------------------------------------------------------------------'
+  ),
+
+  [_RAISE] = LAYOUT_all(
+  //,-----------------------------------------------------------------------------------------------------------.
+                  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0, KC_MINS,
+  //|--------+--------+--------+--------+--------+--------|--------+--------+--------+--------+--------+--------|
+               KC_LCTL, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, KC_LEFT, KC_DOWN,   KC_UP, KC_RGHT,     _______,
+  //|--------+--------+--------+--------+--------+--------|--------+--------+--------+--------+--------+--------|
+               KC_LSFT, XXXXXXX,  KC_ESC,  KC_TAB,   KANJI,  KC_DEL, KC_COMM,  KC_DOT, KC_BSLS,     KC_ROSF,
+  //|--------+--------+--------+--------+--------+--------|--------+--------+--------+--------+--------+--------|
+      _______, _______,                                _______,                                 KC_AJST, _______
+  //`-----------------------------------------------------------------------------------------------------------'
+  ),
+
+  [_ADJUST] = LAYOUT_all(
+  //,-----------------------------------------------------------------------------------------------------------.
+                 RESET,  RGBRST, AG_NORM, AG_SWAP, XXXXXXX, KC_HOME, KC_PGDN, KC_PGUP,  KC_END,  KC_INS, KC_PSCR,
+  //|--------+--------+--------+--------+--------+--------|--------+--------+--------+--------+--------+--------|
+               RGB_TOG, RGB_HUI, RGB_SAI, RGB_VAI, XXXXXXX, KC_MS_L, KC_MS_D, KC_MS_U, KC_MS_R,     KC_NLCK,
+  //|--------+--------+--------+--------+--------+--------|--------+--------+--------+--------+--------+--------|
+               RGB_MOD, RGB_HUD, RGB_SAD, RGB_VAD, XXXXXXX, KC_BTN1, KC_BTN2, XXXXXXX, XXXXXXX,     KC_CAPS,
+  //|--------+--------+--------+--------+--------+--------|--------+--------+--------+--------+--------+--------|
+      _______, _______,                                _______,                                 _______, KC_CAPS
+  //`-----------------------------------------------------------------------------------------------------------'
+  )
+};
+
+uint16_t get_tapping_term(uint16_t keycode) {
+  switch (keycode) {
+    case KC_SPRA:
+      return TAPPING_LAYER_TERM;
+    default:
+      return TAPPING_TERM;
+  }
+}
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+
+  bool result = false;
+  switch (keycode) {
+    case KANJI:
+      if (record->event.pressed) {
+          register_code16(keymap_config.swap_lalt_lgui ? A(KC_GRV) : KC_LANG2);
+      } else {
+          unregister_code16(keymap_config.swap_lalt_lgui ? A(KC_GRV) : KC_LANG2);
+      }
+    break;
+#ifdef RGBLIGHT_ENABLE
+    case RGBRST:
+        if (record->event.pressed) {
+          eeconfig_update_rgblight_default();
+          rgblight_enable();
+        }
+    break;
+#endif
+    default:
+      result = true;
+      break;
+  }
+
+  return result;
+}
+
+void encoder_update_user(uint8_t index, bool clockwise) {
+    if (index == 0) {
+        if (IS_LAYER_ON(_ADJUST)) {
+          if (clockwise) {
+              rgblight_increase_hue_noeeprom();
+          } else {
+              rgblight_decrease_hue_noeeprom();
+          }
+        } else if (IS_LAYER_ON(_LOWER)) {
+          tap_code16((clockwise == true) ? LCTL(KC_Y) : LCTL(KC_Z));
+        } else if (IS_LAYER_ON(_RAISE)) {
+          tap_code16((clockwise == true) ? S(KC_DOWN) : S(KC_UP));
+        } else {
+          tap_code((clockwise == true) ? KC_WH_D : KC_WH_U);
+        }
+
+    }
+}
+
+// for exsample customize of LED inducator
+// bool led_update_user(led_t led_state) {
+//     writePin(D2, IS_LAYER_ON(_LOWER));
+//     writePin(D1, IS_LAYER_ON(_RAISE));
+//     return false;
+// }
diff --git a/keyboards/marksard/leftover30/keymaps/default/readme.md b/keyboards/marksard/leftover30/keymaps/default/readme.md
new file mode 100644
index 0000000000..05dcdc3d14
--- /dev/null
+++ b/keyboards/marksard/leftover30/keymaps/default/readme.md
@@ -0,0 +1 @@
+# The default keymap for leftover30
diff --git a/keyboards/marksard/leftover30/keymaps/default/rules.mk b/keyboards/marksard/leftover30/keymaps/default/rules.mk
new file mode 100644
index 0000000000..5af1ba8536
--- /dev/null
+++ b/keyboards/marksard/leftover30/keymaps/default/rules.mk
@@ -0,0 +1 @@
+ENCODER_ENABLE = yes
diff --git a/keyboards/marksard/leftover30/leftover30.c b/keyboards/marksard/leftover30/leftover30.c
new file mode 100644
index 0000000000..df8152144b
--- /dev/null
+++ b/keyboards/marksard/leftover30/leftover30.c
@@ -0,0 +1,37 @@
+/* Copyright 2020 marksard
+ *
+ * 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 "leftover30.h"
+
+// Optional override functions below.
+// You can leave any or all of these undefined.
+// These are only required if you want to perform custom actions.
+
+void keyboard_pre_init_user(void) {
+  /* Set CAPSLOCK indicator pin as output */
+  setPinOutput(D1);
+  /* Set NUMLOCK indicator pin as output */
+  setPinOutput(D2);
+}
+
+bool led_update_kb(led_t led_state) {
+    bool res = led_update_user(led_state);
+    if(res) {
+        writePin(D2, led_state.num_lock);
+        writePin(D1, led_state.caps_lock);
+    }
+    return res;
+}
diff --git a/keyboards/marksard/leftover30/leftover30.h b/keyboards/marksard/leftover30/leftover30.h
new file mode 100644
index 0000000000..901b9b570a
--- /dev/null
+++ b/keyboards/marksard/leftover30/leftover30.h
@@ -0,0 +1,45 @@
+/* Copyright 2020 marksard
+ *
+ * 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"
+
+/* This is a shortcut to help you visually see your layout.
+ *
+ * The first section contains all of the arguments representing the physical
+ * layout of the board and position of the keys.
+ *
+ * The second converts the arguments into a two-dimensional array which
+ * represents the switch matrix.
+ */
+#define LAYOUT_all( \
+    k00, k01, k02, k03, k04, k05, k06, k07, k08, k09, k0a,\
+     k10, k11, k12, k13, k14, k15, k16, k17, k18,  k19,\
+       k20, k21, k22, k23, k24, k25, k26, k27, k28,   k29,\
+   k30, k31,              k32,                   k33, k34\
+) \
+{ \
+    { k09,   k08,   k07,   k06,   k05 }, \
+    { k19,   k18,   k17,   k16,   k15 }, \
+    { k29,   k28,   k27,   k26,   k25 }, \
+    { k0a,   k34,   k33,   k32,   k31 }, \
+\
+    { k04,   k03,   k02,   k01,   k00 }, \
+    { k14,   k13,   k12,   k11,   k10 }, \
+    { k24,   k23,   k22,   k21,   k20 }, \
+    { KC_NO, KC_NO, KC_NO, KC_NO, k30 } \
+}
diff --git a/keyboards/marksard/leftover30/readme.md b/keyboards/marksard/leftover30/readme.md
new file mode 100644
index 0000000000..6fefb057f2
--- /dev/null
+++ b/keyboards/marksard/leftover30/readme.md
@@ -0,0 +1,17 @@
+# leftover30
+
+![leftover30](https://raw.githubusercontent.com/marksard/Keyboards/master/_image/_leftover30.jpg)
+
+A 30% mini keyboard.
+
+* Keyboard Maintainer: [marksard](https://github.com/marksard)
+* Hardware Supported: LEFTOVER30 PCB (with Pro Micro)
+* Hardware Availability: [Mark's Garage](https://marksard.booth.pm/)
+
+Make example for this keyboard (after setting up your build environment):
+
+    make marksard/leftover30:default
+
+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).
+
+[Build guide](https://github.com/marksard/Keyboards/blob/master/leftover30/documents/leftover30_buildguide.md)  
diff --git a/keyboards/marksard/leftover30/rules.mk b/keyboards/marksard/leftover30/rules.mk
new file mode 100644
index 0000000000..dd52fe113e
--- /dev/null
+++ b/keyboards/marksard/leftover30/rules.mk
@@ -0,0 +1,22 @@
+# MCU name
+MCU = atmega32u4
+
+# Bootloader selection
+BOOTLOADER = caterina
+
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = no       # Virtual DIP switch configuration
+MOUSEKEY_ENABLE = yes       # Mouse keys
+EXTRAKEY_ENABLE = yes       # Audio control and System control
+CONSOLE_ENABLE = no        # Console for debug
+COMMAND_ENABLE = no        # Commands for debug and configuration
+# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
+SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
+# if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+NKRO_ENABLE = no            # USB Nkey Rollover
+BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = yes        # Enable keyboard RGB underglow
+BLUETOOTH_ENABLE = no       # Enable Bluetooth
+AUDIO_ENABLE = no           # Audio output