[Keymap] Add preonic/kjwon15 layout (#6812)

* Add my custom keymap

* Remove del key on left, Add pscr

* Move Audio MOD key to pass ctrl

* Change startup song

* Enable clicky sound

* Swap alt and gui

* Fix semitones

* Add mouse layer

* Change startup song

Additionally, fixup 5 halftones

* Add ctrl key to ctrl+click

* Move media keys to restore raise number keys

* Move mouse key layer switch

* Swap media keys as normal

* Fix music map

* Move mouse speed limit to correct position

* Move prtscr

* Align keycodes

* Add ctrl/esc, swap smart space keys

* Change colemak, dvorak into custom layout

* Fix pure mode (left space)

* Fix mouse mode interrupt

* Add Middle mouse click

* Add Lefthand mouse scroll

* Temporarily disable mouse speed

* Rename custom layout to kjwon15

* Change readme

* Apply suggestions from code review

Co-Authored-By: fauxpark <fauxpark@gmail.com>

* Apply suggestions from code review

* Apply suggestions from code review

Co-Authored-By: fauxpark <fauxpark@gmail.com>

* Update from default keymap's function

5 files changed, 473 insertions, 1 deletions

diff --git a/keyboards/preonic/keymaps/kjwon15/config.h b/keyboards/preonic/keymaps/kjwon15/config.h
new file mode 100644
index 0000000000..af7b8bc28a
--- /dev/null
+++ b/keyboards/preonic/keymaps/kjwon15/config.h
@@ -0,0 +1,67 @@
+#pragma once
+
+
+#define TAPPING_TERM 200
+
+/* #define MK_3_SPEED */
+#define MK_MOMENTARY_ACCEL
+#define MOUSEKEY_MAX_SPEED         8
+
+// Must raise 5 halftones
+/* #define CUSTOM_STARTUP \ */
+/*  Q__NOTE(_FS7), \ */
+/*  W__NOTE(_B7), */
+
+#undef MUSICAL_NOTE
+#define MUSICAL_NOTE(note, duration) {((NOTE##note) * 1.3348398541700344), duration}
+
+#define CUSTOM_STARTUP \
+    QD_NOTE(_A6),  \
+    QD_NOTE(_C7),  \
+    QD_NOTE(_A7),  \
+    QD_NOTE(_F7),  \
+    QD_NOTE(_G7),  \
+    HD_NOTE(_C8),
+
+#undef MUSICAL_NOTE
+#define MUSICAL_NOTE(note, duration) {(NOTE##note), duration}
+
+#ifdef AUDIO_ENABLE
+    #define STARTUP_SONG SONG(CUSTOM_STARTUP)
+    // #define STARTUP_SONG SONG(NO_SOUND)
+
+    #define DEFAULT_LAYER_SONGS { SONG(QWERTY_SOUND), \
+                                  SONG(COLEMAK_SOUND), \
+                                  SONG(DVORAK_SOUND) \
+                                }
+#endif
+
+#define MUSIC_MASK (keycode != KC_NO)
+
+#define AUDIO_CLICKY
+#define AUDIO_CLICKY_FREQ_DEFAULT 440.f
+
+/*
+ * MIDI options
+ */
+
+/* Prevent use of disabled MIDI features in the keymap */
+//#define MIDI_ENABLE_STRICT 1
+
+/* enable basic MIDI features:
+   - MIDI notes can be sent when in Music mode is on
+*/
+
+#define MIDI_BASIC
+
+/* enable advanced MIDI features:
+   - MIDI notes can be added to the keymap
+   - Octave shift and transpose
+   - Virtual sustain, portamento, and modulation wheel
+   - etc.
+*/
+//#define MIDI_ADVANCED
+
+/* override number of MIDI tone keycodes (each octave adds 12 keycodes and allocates 12 bytes) */
+//#define MIDI_TONE_KEYCODE_OCTAVES 2
+
diff --git a/keyboards/preonic/keymaps/kjwon15/keymap.c b/keyboards/preonic/keymaps/kjwon15/keymap.c
new file mode 100644
index 0000000000..bca3575fdd
--- /dev/null
+++ b/keyboards/preonic/keymaps/kjwon15/keymap.c
@@ -0,0 +1,376 @@
+/* Copyright 2015-2017 Jack Humbert
+ *
+ * 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
+#include "muse.h"
+
+enum preonic_layers {
+  _QWERTY,
+  _PURE,
+  _BLANK,
+  _LOWER,
+  _RAISE,
+  _ADJUST,
+
+  _MOUSE
+};
+
+enum preonic_keycodes {
+  QWERTY = SAFE_RANGE,
+  PURE,
+  BLANK,
+  LOWER,
+  RAISE,
+  KC_CESC,
+  SPC_MOU
+};
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+/* Qwerty
+ * ,-----------------------------------------------------------------------------------.
+ * | ESC  |   1  |   2  |   3  |   4  |   5  |   6  |   7  |   8  |   9  |   0  | Bksp |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | Tab  |   Q  |   W  |   E  |   R  |   T  |   Y  |   U  |   I  |   O  |   P  | [    |
+ * |------+------+------+------+------+-------------+------+------+------+------+------|
+ * | C/ESC|   A  |   S  |   D  |   F  |   G  |   H  |   J  |   K  |   L  |   ;  |  "   |
+ * |------+------+------+------+------+------|------+------+------+------+------+------|
+ * | Shift|   Z  |   X  |   C  |   V  |   B  |   N  |   M  |   ,  |   .  |   /  | SF/EN|
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | Enter| Ctrl | GUI  | Alt  |Lower |    Space    |Raise | Left | Down |  Up  |Right |
+ * `-----------------------------------------------------------------------------------'
+ */
+[_QWERTY] = LAYOUT_preonic_grid(
+  KC_ESC,   KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_BSPC, \
+  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_CESC,  KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT, \
+  KC_LSFT,  KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH, KC_SFTENT,  \
+  KC_ENT,   KC_LCTL, KC_LGUI, KC_LALT, LOWER,   SPC_MOU, KC_SPC,  RAISE,   KC_LEFT, KC_DOWN, KC_UP,   KC_RGHT  \
+),
+
+/* Pure
+ * ,-----------------------------------------------------------------------------------.
+ * | ESC  |   1  |   2  |   3  |   4  |   5  |   6  |   7  |   8  |   9  |   0  | Bksp |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | Tab  |   Q  |   W  |   E  |   R  |   T  |   Y  |   U  |   I  |   O  |   P  | [    |
+ * |------+------+------+------+------+-------------+------+------+------+------+------|
+ * | Cntl |   A  |   S  |   D  |   F  |   G  |   H  |   J  |   K  |   L  |   ;  |  "   |
+ * |------+------+------+------+------+------|------+------+------+------+------+------|
+ * | Shift|   Z  |   X  |   C  |   V  |   B  |   N  |   M  |   ,  |   .  |   /  | Shift|
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | Enter| Ctrl | GUI  | Alt  |Lower |    Space    |Raise | Left | Down |  Up  |Right |
+ * `-----------------------------------------------------------------------------------'
+ */
+[_PURE] = LAYOUT_preonic_grid(
+  KC_ESC,   KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_BSPC, \
+  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_LCTL,  KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT, \
+  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_ENT,   KC_LCTL, KC_LGUI, KC_LALT, LOWER,   KC_SPC,  KC_SPC,  RAISE,   KC_LEFT, KC_DOWN, KC_UP,   KC_RGHT  \
+),
+
+/* Blank
+ * ,-----------------------------------------------------------------------------------.
+ * |      |      |      |      |      |      |      |      |      |      |      |      |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * |      |      |      |      |      |      |      |      |      |      |      |      |
+ * |------+------+------+------+------+-------------+------+------+------+------+------|
+ * |      |      |      |      |      |      |      |      |      |      |      |      |
+ * |------+------+------+------+------+------|------+------+------+------+------+------|
+ * |      |      |      |      |      |      |      |      |      |      |      |      |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * |      |      |      |      |Lower |             |Raise |      |      |      |      |
+ * `-----------------------------------------------------------------------------------'
+ */
+[_BLANK] = LAYOUT_preonic_grid(
+  KC_NO,  KC_NO,    KC_NO,    KC_NO,    KC_NO,    KC_NO,    KC_NO,    KC_NO,    KC_NO,    KC_NO,    KC_NO,    KC_NO, \
+  KC_NO,  KC_NO,    KC_NO,    KC_NO,    KC_NO,    KC_NO,    KC_NO,    KC_NO,    KC_NO,    KC_NO,    KC_NO,    KC_NO, \
+  KC_NO,  KC_NO,    KC_NO,    KC_NO,    KC_NO,    KC_NO,    KC_NO,    KC_NO,    KC_NO,    KC_NO,    KC_NO,    KC_NO, \
+  KC_NO,  KC_NO,    KC_NO,    KC_NO,    KC_NO,    KC_NO,    KC_NO,    KC_NO,    KC_NO,    KC_NO,    KC_NO,    KC_NO, \
+  KC_NO,  KC_NO,    KC_NO,    KC_NO,    LOWER,    KC_NO,    KC_NO,    RAISE,    KC_NO,    KC_NO,    KC_NO,    KC_NO  \
+),
+
+/* Lower
+ * ,-----------------------------------------------------------------------------------.
+ * |  ESC |   !  |   @  |   #  |   $  |   %  |   ^  |   &  |   *  |   -  |   =  | Bksp |
+ * |------+------+------+------+------+-------------+------+------+------+------+------|
+ * |   ~  |   !  |   @  |   #  |   $  |   %  |   ^  |   &  |   *  |   (  |   )  | Del  |
+ * |------+------+------+------+------+-------------+------+------+------+------+------|
+ * |      |  F1  |  F2  |  F3  |  F4  |  F5  |  F6  |   _  |   +  |   {  |   }  |  |   |
+ * |------+------+------+------+------+------|------+------+------+------+------+------|
+ * |      |  F7  |  F8  |  F9  |  F10 |  F11 |  F12 |ISO ~ |ISO | | HOME |  END |      |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * |      |      |      |      |      |             |      | Ralt | Vol- | Vol+ | Play |
+ * `-----------------------------------------------------------------------------------'
+ */
+[_LOWER] = LAYOUT_preonic_grid(
+  KC_ESC,  KC_EXLM, KC_AT,   KC_HASH, KC_DLR,  KC_PERC, KC_CIRC, KC_AMPR, KC_ASTR, KC_MINS, KC_EQL , KC_BSPC, \
+  KC_TILD, KC_EXLM, KC_AT,   KC_HASH, KC_DLR,  KC_PERC, KC_CIRC, KC_AMPR, KC_ASTR, KC_LPRN, KC_RPRN, KC_DEL,  \
+  _______, KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_UNDS, KC_PLUS, KC_LCBR, KC_RCBR, KC_PIPE, \
+  _______, KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,S(KC_NUHS),S(KC_NUBS),KC_HOME, KC_END, _______, \
+  _______, _______, _______, _______, _______, _______, _______, _______, KC_RALT, KC_VOLD, KC_VOLU, KC_MPLY \
+),
+
+/* Raise
+ * ,-----------------------------------------------------------------------------------.
+ * | ESC  |   1  |   2  |   3  |   4  |   5  |   6  |   7  |   8  |   9  |   0  |PrtScr|
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * |   `  |   1  |   2  |   3  |   4  |   5  |   6  |   7  |   8  |   9  |   0  | Del  |
+ * |------+------+------+------+------+-------------+------+------+------+------+------|
+ * |      | MUTE | VOL- | VOL+ |  F4  |  F5  |  F6  |   -  |   =  |   [  |   ]  |  \   |
+ * |------+------+------+------+------+------|------+------+------+------+------+------|
+ * |      | PLAY | PREV | NEXT | STOP |  F11 |  F12 |ISO # |ISO / | PGDN | PGUP |      |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * |      |      |      |      |      |             |      | Ralt | Vol- | Vol+ | Mute |
+ * `-----------------------------------------------------------------------------------'
+ */
+[_RAISE] = LAYOUT_preonic_grid(
+  KC_ESC,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_PSCR, \
+  KC_GRV,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_DEL,  \
+  _______, KC_MUTE, KC_VOLD, KC_VOLU, KC_F4,   KC_F5,   KC_F6,   KC_MINS, KC_EQL,  KC_LBRC, KC_RBRC, KC_BSLS, \
+  _______, KC_MPLY, KC_MPRV, KC_MNXT, KC_MSTP, KC_F11,  KC_F12,  KC_NUHS, KC_NUBS, KC_PGDN, KC_PGUP, _______, \
+  _______, _______, _______, _______, _______, _______, _______, _______, KC_RALT, KC_VOLD, KC_VOLU, KC_MUTE  \
+),
+
+/* Adjust (Lower + Raise)
+ * ,-----------------------------------------------------------------------------------.
+ * |  F1  |  F2  |  F3  |  F4  |  F5  |  F6  |  F7  |  F8  |  F9  |  F10 |  F11 |  F12 |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * | LOCK | Reset|Clicky|AudMod|Qwerty|Colemk|Dvorak| WHL_D| MS_U | WHL_U|      |  Del |
+ * |------+------+------+------+------+-------------+------+------+------+------+------|
+ * |      |Aud on|AudOff|Rclick|Lclick|AGnorm|AGswap| MS_L | MS_D | MS_R |      |      |
+ * |------+------+------+------+------+------|------+------+------+------+------+------|
+ * |      |Voice-|Voice+|Mus on|MusOff|MidiOn|MidOff|      |      |      |      |      |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * |      |      |      |      |      |             |      |      |      |      |      |
+ * `-----------------------------------------------------------------------------------'
+ */
+[_ADJUST] = LAYOUT_preonic_grid(
+  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_LOCK, RESET,   CK_TOGG, MU_MOD,  QWERTY,  PURE, BLANK,  KC_WH_D, KC_MS_U, KC_WH_U, _______, KC_DEL,  \
+  _______, AU_ON,   AU_OFF,  KC_BTN2, KC_BTN1, AG_NORM, AG_SWAP, KC_MS_L, KC_MS_D, KC_MS_R, _______, KC_ACL0, \
+  _______, MUV_DE,  MUV_IN,  MU_ON,   MU_OFF,  MI_ON,   MI_OFF,  _______, _______, _______, _______, KC_ACL1, \
+  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, KC_ACL2  \
+),
+
+/* Mouse
+ * ,-----------------------------------------------------------------------------------.
+ * |  F1  |  F2  |  F3  |  F4  |  F5  |  F6  |  F7  |  F8  |  F9  |  F10 |  F11 |  F12 |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * |      |      | WHL_U|Mclick|      |      |      | LCTL | MS_U | WHL_U|      |  Del |
+ * |------+------+------+------+------+-------------+------+------+------+------+------|
+ * |      |      | WHL_D|Rclick|Lclick|      |      | MS_L | MS_D | MS_R |      | ACL0 |
+ * |------+------+------+------+------+------|------+------+------+------+------+------|
+ * |      |      |      |      |      |      |      | WHL_D| WHL_L| WHL_R|      | ACL1 |
+ * |------+------+------+------+------+------+------+------+------+------+------+------|
+ * |      |      |      |      |      |             |      |      |      |      | ACL2 |
+ * `-----------------------------------------------------------------------------------'
+ */
+[_MOUSE] = LAYOUT_preonic_grid(
+  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_WH_U, KC_BTN3, _______, _______, _______, KC_LCTL, KC_MS_U, KC_WH_U, _______, KC_DEL,  \
+  _______, _______, KC_WH_D, KC_BTN2, KC_BTN1, _______, _______, KC_MS_L, KC_MS_D, KC_MS_R, _______, KC_ACL0, \
+  _______, _______, _______, _______, _______, _______, _______, KC_WH_D, KC_WH_L, KC_WH_R, _______, KC_ACL1, \
+  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, KC_ACL2  \
+  )
+
+
+};
+
+static bool cntl_interrupted = 0;
+static uint16_t cntl_timer = 0;
+
+static bool mouse_interrupted = 0;
+static uint16_t mouse_timer = 0;
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+  switch (keycode) {
+        case QWERTY:
+          if (record->event.pressed) {
+            set_single_persistent_default_layer(_QWERTY);
+          }
+          return false;
+          break;
+        case PURE:
+          if (record->event.pressed) {
+            set_single_persistent_default_layer(_PURE);
+          }
+          return false;
+          break;
+        case BLANK:
+          if (record->event.pressed) {
+            set_single_persistent_default_layer(_BLANK);
+          }
+          return false;
+          break;
+        case LOWER:
+          if (record->event.pressed) {
+            layer_on(_LOWER);
+            update_tri_layer(_LOWER, _RAISE, _ADJUST);
+          } else {
+            layer_off(_LOWER);
+            update_tri_layer(_LOWER, _RAISE, _ADJUST);
+          }
+          return false;
+          break;
+        case RAISE:
+          if (record->event.pressed) {
+            layer_on(_RAISE);
+            update_tri_layer(_LOWER, _RAISE, _ADJUST);
+          } else {
+            layer_off(_RAISE);
+            update_tri_layer(_LOWER, _RAISE, _ADJUST);
+          }
+          return false;
+          break;
+
+        // BACKLIT is not used. If you want to use, uncomment below
+        /*
+        case BACKLIT:
+          if (record->event.pressed) {
+            register_code(KC_RSFT);
+            #ifdef BACKLIGHT_ENABLE
+              backlight_step();
+            #endif
+            #ifdef __AVR__
+            PORTE &= ~(1<<6);
+            #endif
+          } else {
+            unregister_code(KC_RSFT);
+            #ifdef __AVR__
+            PORTE |= (1<<6);
+            #endif
+          }
+          return false;
+          break;
+        */
+
+        case KC_CESC:
+          if (record->event.pressed) {
+           cntl_interrupted = false;
+           cntl_timer = timer_read();
+           register_mods(MOD_BIT(KC_LCTL));
+          } else if (!cntl_interrupted && timer_elapsed(cntl_timer) < TAPPING_TERM) {
+           unregister_mods(MOD_BIT(KC_LCTL));
+           tap_code(KC_ESC);
+          } else {
+           unregister_mods(MOD_BIT(KC_LCTL));
+          }
+          return false;
+          break;
+
+        case SPC_MOU:
+          if (record->event.pressed) {
+           mouse_interrupted = false;
+           mouse_timer = timer_read();
+
+           cntl_interrupted = true;
+           layer_on(_MOUSE);
+          } else if (!mouse_interrupted && timer_elapsed(mouse_timer) < TAPPING_TERM) {
+           layer_off(_MOUSE);
+           tap_code(KC_SPC);
+          } else {
+           layer_off(_MOUSE);
+          }
+          return false;
+          break;
+
+        default:
+          cntl_interrupted = true;
+          mouse_interrupted = true;
+          break;
+      }
+    return true;
+};
+
+bool muse_mode = false;
+uint8_t last_muse_note = 0;
+uint16_t muse_counter = 0;
+uint8_t muse_offset = 70;
+uint16_t muse_tempo = 50;
+
+void encoder_update_user(uint8_t index, bool clockwise) {
+  if (muse_mode) {
+    if (IS_LAYER_ON(_RAISE)) {
+      if (clockwise) {
+        muse_offset++;
+      } else {
+        muse_offset--;
+      }
+    } else {
+      if (clockwise) {
+        muse_tempo+=1;
+      } else {
+        muse_tempo-=1;
+      }
+    }
+  } else {
+    if (clockwise) {
+      tap_code(KC_PGDN);
+    } else {
+      tap_code(KC_PGUP);
+    }
+  }
+}
+
+void dip_switch_update_user(uint8_t index, bool active) {
+    switch (index) {
+        case 0:
+            if (active) {
+                layer_on(_ADJUST);
+            } else {
+                layer_off(_ADJUST);
+            }
+            break;
+        case 1:
+            if (active) {
+                muse_mode = true;
+            } else {
+                muse_mode = false;
+            }
+    }
+}
+
+void matrix_scan_user(void) {
+#ifdef AUDIO_ENABLE
+    if (muse_mode) {
+        if (muse_counter == 0) {
+            uint8_t muse_note = muse_offset + SCALE[muse_clock_pulse()];
+            if (muse_note != last_muse_note) {
+                stop_note(compute_freq_for_midi_note(last_muse_note));
+                play_note(compute_freq_for_midi_note(muse_note), 0xF);
+                last_muse_note = muse_note;
+            }
+        }
+        muse_counter = (muse_counter + 1) % muse_tempo;
+    } else {
+        if (muse_counter) {
+            stop_all_notes();
+            muse_counter = 0;
+        }
+    }
+#endif
+}
+
+bool music_mask_user(uint16_t keycode) {
+  switch (keycode) {
+    case RAISE:
+    case LOWER:
+      return false;
+    default:
+      return true;
+  }
+}
diff --git a/keyboards/preonic/keymaps/kjwon15/readme.md b/keyboards/preonic/keymaps/kjwon15/readme.md
new file mode 100644
index 0000000000..5d03a1a0b8
--- /dev/null
+++ b/keyboards/preonic/keymaps/kjwon15/readme.md
@@ -0,0 +1,27 @@
+# Kjwon15's Preonic layout
+
+
+## It provides almost full functionality for linux
+
+It has screen capture key which is also used on sysq
+
+
+## Mouse layer
+
+Press left spacebar to activate mouse mode.
+Right hand to move cursor/scroll, Left hand to click
+
+
+## Dual function keys
+
+Right shift is also Enter key. If you press and hold, that key act as shift. But if you tap that key, It is enter key.
+If you want to press and hold enter key, Use left-bottom key. That is pure enter.
+
+## Blank layout
+
+If you want to lock your keyboard, switch to this layout. It also useful when you want to clean your keyboard without disconnecting USB.
+
+
+## Pure mode
+
+Dual function keys are so annoying when you playing game. Then use this layout
diff --git a/keyboards/preonic/keymaps/kjwon15/rules.mk b/keyboards/preonic/keymaps/kjwon15/rules.mk
new file mode 100644
index 0000000000..5ffe1ff328
--- /dev/null
+++ b/keyboards/preonic/keymaps/kjwon15/rules.mk
@@ -0,0 +1,2 @@
+SRC += muse.c
+KEY_LOCK_ENABLE = yes
diff --git a/keyboards/preonic/preonic.c b/keyboards/preonic/preonic.c
index ff07f961f2..8d052ea81f 100644
--- a/keyboards/preonic/preonic.c
+++ b/keyboards/preonic/preonic.c
@@ -12,7 +12,7 @@ const keypos_t hand_swap_config[MATRIX_ROWS][MATRIX_COLS] = {
 #endif
 
 const uint8_t music_map[MATRIX_ROWS][MATRIX_COLS] = LAYOUT_preonic_grid(
-  48, 49, 50, 51, 52, 53, 53, 55, 56, 57, 58, 59,
+  48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59,
   36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
   24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,
   12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,