[Keyboard] add chromatonemini keyboard (#13516)

3 files changed, 686 insertions, 0 deletions

diff --git a/keyboards/chromatonemini/keymaps/led/keymap.c b/keyboards/chromatonemini/keymaps/led/keymap.c
new file mode 100644
index 0000000000..99da8ed0c9
--- /dev/null
+++ b/keyboards/chromatonemini/keymaps/led/keymap.c
@@ -0,0 +1,682 @@
+/* Copyright 2021 3araht
+ *
+ * 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 "version.h"
+
+//  define which MIDI ch to use.
+//  Note that (actual MIDI ch# - 1) -> 0 .. 15 is used for coding.
+//  ch1
+#define DEFAULT_MAIN_CH_NUMBER 0
+//  ch3
+#define DEFAULT_SUB_CH_NUMBER  2
+//  ch2
+#define ALT_MAIN_CH_NUMBER     1
+//  ch4
+#define ALT_SUB_CH_NUMBER      3
+static uint8_t midi_left_ch = DEFAULT_SUB_CH_NUMBER;       //  By default, DEFAULT_SUB_CH_NUMBER is used for left side when separated.
+
+//  By default( when use_alt_ch_gr == false), DEFAULT ch group (DEFAULT_MAIN_CH_NUMBER for entirely, or right side when separated, DEFAULT_SUB_CH_NUMBER for left side) is used.
+//  When false, ALT ch group (ALT_MAIN_CH_NUMBER for entirely, or right side when separated, ALT_SUB_CH_NUMBER for left side) is used.
+static bool use_alt_ch_gr = false;
+
+// Defines names for use in layer keycodes and the keymap
+enum layer_names {
+    _BASE,              //  Base layer, shift mode, single channel.
+    _SEPALEFTOCT,       //  1st oct channel separated version. Shift mode.
+    _SEPAHALF,          //  Half channel separated version. Shift mode.
+    _SEPARIGHTOCT,      //  2nd oct channel separated version. Shift mode.
+    _TRANS,             //  Transpose feature is enabled instead of shift mode, single channel.
+    _FLIPBASE,          //  Horizontal flipped version entirely. single channel.
+    _FLIPTRANS,         //  Horizontal flipped version entirely. Transpose is used. single channel.
+    _FN                 //  FuNction layer. This must be at the end of the enumurate to use the range from _LS_FN ... _LS_FN_MAX for FN layer LED settings.
+};
+
+//  Layer State
+#define _LS_BASE           (1UL << _BASE)
+#define _LS_SEPALEFTOCT    (1UL << _SEPALEFTOCT)
+#define _LS_SEPAHALF       (1UL << _SEPAHALF)
+#define _LS_SEPARIGHTOCT   (1UL << _SEPARIGHTOCT)
+#define _LS_FLIPBASE       (1UL << _FLIPBASE)
+
+#define _LS_TRANS          (1UL << _BASE         | 1UL << _TRANS)
+#define _LS_SEPALEFTOCT_T  (1UL << _SEPALEFTOCT  | 1UL << _TRANS)
+#define _LS_SEPAHALF_T     (1UL << _SEPAHALF     | 1UL << _TRANS)
+#define _LS_SEPARIGHTOCT_T (1UL << _SEPARIGHTOCT | 1UL << _TRANS)
+#define _LS_FLIPTRANS      (1UL << _FLIPBASE     | 1UL << _FLIPTRANS)
+
+#define _LS_FN             (1UL << _FN)
+#define _LS_MAX            (_LS_FN << 1)
+
+//  Don't change the DEFAULT_SCALE_COL value below. It must be 0.
+#define DEFAULT_SCALE_COL 0
+static uint8_t scale_indicator_col = DEFAULT_SCALE_COL;
+static bool trans_mode_indicator_loc_sel = true;  // when it is true, the location is _KEY01, _KEY13, ...
+
+//  use led indicator or not.
+static bool led_indicator_enable = true;
+
+// Defines the keycodes used by our macros in process_record_user
+enum custom_keycodes {
+    SHIFT_L = SAFE_RANGE,
+    SHIFT_R,
+    TGLINDI,  //  ToGgLe INDIcator
+    TGLINTR,  //  ToGgLe INdicator location {(_KEY01, _KEY13, _KEY25, _KEY37) or (_KEY02, _KEY14, _KEY26) / (_KEY12, _KEY24, _KEY36)}in TRans mode
+    TGLTRNS,  //  ToGgLe TRaNS and shift
+    TGLCHGR,  //  ToGgLe CH GRoup
+    VERSION,
+
+    B_BASE,            //  border set to the left end.
+    B_LEFT,            //  border set to the 1st left octave.
+    B_CENTER,          //  border set to the center.
+    B_RIGHT,           //  border set to the 1st right octave.
+    B_FLIP,            //  border set to the right end.
+
+    // MY tone for _FLIPHALF and _FLIPLEFTOCT layers to distinguish the notes to avoid sustain effect, etc.
+    // Since they are flipped, their subscripts are not MY_ but YM_, to make them easier to tell.
+    YM_TONE_MIN,
+
+    YM_C = YM_TONE_MIN,
+    YM_Cs,
+    YM_Db = YM_Cs,
+    YM_D,
+    YM_Ds,
+    YM_Eb = YM_Ds,
+    YM_E,
+    YM_F,
+    YM_Fs,
+    YM_Gb = YM_Fs,
+    YM_G,
+    YM_Gs,
+    YM_Ab = YM_Gs,
+    YM_A,
+    YM_As,
+    YM_Bb = YM_As,
+    YM_B,
+
+    YM_C_1,
+    YM_Cs_1,
+    YM_Db_1 = YM_Cs_1,
+    YM_D_1,
+    YM_Ds_1,
+    YM_Eb_1 = YM_Ds_1,
+    YM_E_1,
+    YM_F_1,
+    YM_Fs_1,
+    YM_Gb_1 = YM_Fs_1,
+    YM_G_1,
+    YM_Gs_1,
+    YM_Ab_1 = YM_Gs_1,
+    YM_A_1,
+    YM_As_1,
+    YM_Bb_1 = YM_As_1,
+    YM_B_1,
+
+    YM_C_2,
+    YM_Cs_2,
+    YM_Db_2 = YM_Cs_2,
+    YM_D_2,
+    YM_Ds_2,
+    YM_Eb_2 = YM_Ds_2,
+    YM_E_2,
+    YM_F_2,
+    YM_Fs_2,
+    YM_Gb_2 = YM_Fs_2,
+    YM_G_2,
+    YM_Gs_2,
+    YM_Ab_2 = YM_Gs_2,
+    YM_A_2,
+    YM_As_2,
+    YM_Bb_2 = YM_As_2,
+    YM_B_2,
+
+    YM_C_3,
+    YM_Cs_3,
+    YM_Db_3 = YM_Cs_3,
+    YM_D_3,
+    YM_Ds_3,
+    YM_Eb_3 = YM_Ds_3,
+    YM_E_3,
+    YM_F_3,
+    YM_Fs_3,
+    YM_Gb_3 = YM_Fs_3,
+    YM_G_3,
+    YM_Gs_3,
+    YM_Ab_3 = YM_Gs_3,
+    YM_A_3,
+    YM_As_3,
+    YM_Bb_3 = YM_As_3,
+    YM_B_3,
+
+    YM_C_4,
+    YM_Cs_4,
+    YM_Db_4 = YM_Cs_4,
+    YM_D_4,
+    YM_Ds_4,
+    YM_Eb_4 = YM_Ds_4,
+    YM_E_4,
+    YM_F_4,
+    YM_Fs_4,
+    YM_Gb_4 = YM_Fs_4,
+    YM_G_4,
+    YM_Gs_4,
+    YM_Ab_4 = YM_Gs_4,
+    YM_A_4,
+    YM_As_4,
+    YM_Bb_4 = YM_As_4,
+    YM_B_4,
+
+    YM_C_5,
+    YM_Cs_5,
+    YM_Db_5 = YM_Cs_5,
+    YM_D_5,
+    YM_Ds_5,
+    YM_Eb_5 = YM_Ds_5,
+    YM_E_5,
+    YM_F_5,
+    YM_Fs_5,
+    YM_Gb_5 = YM_Fs_5,
+    YM_G_5,
+    YM_Gs_5,
+    YM_Ab_5 = YM_Gs_5,
+    YM_A_5,
+    YM_As_5,
+    YM_Bb_5 = YM_As_5,
+    YM_B_5,
+
+    YM_C_6,
+    YM_TONE_MAX = YM_C_6
+};
+
+#define MY_TONE_COUNT (YM_TONE_MAX - YM_TONE_MIN + 1)
+static uint8_t my_tone_status[MY_TONE_COUNT];
+
+// Long press: go to _FN layer, tap: MUTE
+#define FN_MUTE LT(_FN, KC_MUTE)
+
+// Used to set octave to MI_OCT_0
+extern midi_config_t midi_config;
+static bool is_trans_mode = false;     //  By default, shift mode is chosen.
+
+static uint8_t key_separator_col = _KEY01;  //  (_KEY01 .. _KEY37).     By default, _KEY01 (= _BASE layer) is chosen. _KEY13 = *LEFT, _KEY19 = *HALF, _KEY25 = *RIGHT, _KEY37 = _FLIPBASE and _FLIPTRANS.
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    /* Base */
+    [_BASE] = LAYOUT(
+            FN_MUTE,         MI_SUS,                             KC_VOLD, KC_VOLU,
+            MI_BENDU,
+        SHIFT_L, SHIFT_R,    MI_C_2, MI_D_2, MI_E_2,  MI_Fs_2, MI_Ab_2, MI_Bb_2, MI_C_3, MI_D_3, MI_E_3, MI_Fs_3, MI_Ab_3, MI_Bb_3, MI_C_4,  MI_D_4,  MI_E_4, MI_Fs_4, MI_Ab_4, MI_Bb_4, MI_C_5,
+            MI_BENDD,           MI_Db_2, MI_Eb_2, MI_F_2,  MI_G_2,  MI_A_2,  MI_B_2, MI_Db_3, MI_Eb_3, MI_F_3,  MI_G_3, MI_A_3,  MI_B_3, MI_Db_4, MI_Eb_4, MI_F_4,  MI_G_4,  MI_A_4,  MI_B_4
+    ),
+
+    /* 1 octave on the left side is ch2, others are ch1 (normal) */
+    [_SEPALEFTOCT] = LAYOUT(
+            _______,          _______,                             _______, _______,
+            _______,
+        SHIFT_L, SHIFT_R,     YM_C_2, YM_D_2, YM_E_2,  YM_Fs_2, YM_Ab_2, YM_Bb_2,     MI_C_3, MI_D_3, MI_E_3, MI_Fs_3, MI_Ab_3, MI_Bb_3, MI_C_4,  MI_D_4,  MI_E_4, MI_Fs_4, MI_Ab_4, MI_Bb_4, MI_C_5,
+            _______,             YM_Db_2, YM_Eb_2, YM_F_2,  YM_G_2,  YM_A_2,  YM_B_2,     MI_Db_3, MI_Eb_3, MI_F_3,  MI_G_3, MI_A_3,  MI_B_3, MI_Db_4, MI_Eb_4, MI_F_4,  MI_G_4,  MI_A_4,  MI_B_4
+    ),
+
+    /* Half ch2, half ch1 (normal) */
+    [_SEPAHALF] = LAYOUT(
+            _______,           _______,                             _______, _______,
+            _______,
+        SHIFT_L, SHIFT_R,      YM_C_2, YM_D_2, YM_E_2,  YM_Fs_2, YM_Ab_2, YM_Bb_2, YM_C_3, YM_D_3, YM_E_3,       MI_Fs_3, MI_Ab_3, MI_Bb_3, MI_C_4,  MI_D_4,  MI_E_4, MI_Fs_4, MI_Ab_4, MI_Bb_4, MI_C_5,
+            _______,               YM_Db_2, YM_Eb_2, YM_F_2,  YM_G_2,  YM_A_2,  YM_B_2, YM_Db_3, YM_Eb_3, YM_F_3,    MI_G_3, MI_A_3,  MI_B_3, MI_Db_4, MI_Eb_4, MI_F_4,  MI_G_4,  MI_A_4,  MI_B_4
+    ),
+
+    /* 2 octave on the left side is ch2, others are ch1 (normal) */
+    [_SEPARIGHTOCT] = LAYOUT(
+            _______,           _______,                             _______, _______,
+            _______,
+        SHIFT_L, SHIFT_R,      YM_C_2, YM_D_2, YM_E_2,  YM_Fs_2, YM_Ab_2, YM_Bb_2, YM_C_3, YM_D_3, YM_E_3, YM_Fs_3, YM_Ab_3, YM_Bb_3,      MI_C_4,  MI_D_4,  MI_E_4, MI_Fs_4, MI_Ab_4, MI_Bb_4, MI_C_5,
+            _______,               YM_Db_2, YM_Eb_2, YM_F_2,  YM_G_2,  YM_A_2,  YM_B_2, YM_Db_3, YM_Eb_3, YM_F_3,  YM_G_3, YM_A_3,  YM_B_3,     MI_Db_4, MI_Eb_4, MI_F_4,  MI_G_4,  MI_A_4,  MI_B_4
+    ),
+
+    /* TRANS   This layer must locate 1 layer below _FN layer. */
+    [_TRANS] = LAYOUT(
+            _______,           _______,                             _______, _______,
+            _______,
+        MI_TRNSD, MI_TRNSU,   _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+            _______,               _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______
+    ),
+
+    /* Flip Base    SFIFTUP and SHIFT_L are swapped. */
+    [_FLIPBASE] = LAYOUT(
+            FN_MUTE,          MI_SUS,                             KC_VOLD, KC_VOLU,
+            MI_BENDU,
+        SHIFT_L, SHIFT_R,     MI_C_5, MI_Bb_4, MI_Ab_4,  MI_Fs_4, MI_E_4, MI_D_4, MI_C_4, MI_Bb_3, MI_Ab_3, MI_Fs_3, MI_E_3, MI_D_3, MI_C_3,  MI_Bb_2,  MI_Ab_2, MI_Fs_2, MI_E_2, MI_D_2, MI_C_2,
+            MI_BENDD,           MI_B_4, MI_A_4, MI_G_4,  MI_F_4,  MI_Eb_4,  MI_Db_4, MI_B_3, MI_A_3, MI_G_3,  MI_F_3, MI_Eb_3,  MI_Db_3, MI_B_2, MI_A_2, MI_G_2,  MI_F_2,  MI_Eb_2,  MI_Db_2
+    ),
+
+    /* Flip Trans   This layer must locate 1 layer above _FLIPBASE layer.  MI_TRNSU and MI_TRNSD are swapped. */
+    [_FLIPTRANS] = LAYOUT(
+            _______,          _______,                             _______, _______,
+            _______,
+        MI_TRNSU, MI_TRNSD,   _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+            _______,               _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______
+    ),
+
+    [_FN] =  LAYOUT(
+            _______,          XXXXXXX,                             RGB_RMOD, RGB_MOD,
+            MI_VELU,
+        MI_OCTD, MI_OCTU,     B_BASE,  XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, B_LEFT, XXXXXXX, XXXXXXX, B_CENTER, XXXXXXX, XXXXXXX, B_RIGHT, XXXXXXX, XXXXXXX, XXXXXXX, VERSION, XXXXXXX, B_FLIP,
+            MI_VELD,               TGLINTR, TGLTRNS, TGLCHGR, XXXXXXX, XXXXXXX, RGB_SAD, RGB_SAI, RGB_HUD, RGB_HUI, RGB_SPD, RGB_SPI, RGB_VAD, RGB_VAI, RGB_RMOD, RGB_MOD, EEP_RST, TGLINDI, RGB_TOG
+    )
+};
+
+// commom codes called from eeconfig_init_user() and keyboard_post_init_user().
+void my_init(void){
+    //  Set octave to MI_OCT_1
+    midi_config.octave = MI_OCT_0 - MIDI_OCTAVE_MIN;
+    // avoid using 127 since it is used as a special number in some sound sources.
+    midi_config.velocity = MIDI_INITIAL_VELOCITY;
+    default_layer_set(_LS_BASE);
+    layer_state_set(_LS_BASE);
+
+#ifdef RGB_MATRIX_ENABLE
+    rgb_matrix_sethsv(HSV_BLUE);
+    rgb_matrix_mode(RGB_MATRIX_CUSTOM_my_solid_reactive_col);
+#endif  // RGB_MATRIX_ENABLE
+}
+
+void eeconfig_init_user(void) {  // EEPROM is getting reset!
+    midi_init();
+
+#ifdef RGB_MATRIX_ENABLE
+    rgb_matrix_enable();
+    rgb_matrix_set_speed(RGB_MATRIX_STARTUP_SPD);
+#endif  // RGB_MATRIX_ENABLE
+    my_init(); // commom codes called from eeconfig_init_user() and keyboard_post_init_user().
+}
+
+void keyboard_post_init_user(void) {
+    for (uint8_t i = 0; i < MY_TONE_COUNT; i++) {
+        my_tone_status[i] = MIDI_INVALID_NOTE;
+    }
+    my_init(); // commom codes called from eeconfig_init_user() and keyboard_post_init_user().
+}
+
+void reset_scale_indicator(void) {
+    //  reset transpose value and scale_indicator_col to default.
+    midi_config.transpose = 0;
+    scale_indicator_col = DEFAULT_SCALE_COL;
+    trans_mode_indicator_loc_sel = true;
+}
+
+void reset_all(void) {
+    reset_scale_indicator();
+    is_trans_mode = false;      //  trans mode is disabled by default.
+}
+
+void my_process_midi4single_note(uint8_t channel, uint16_t keycode, keyrecord_t *record, uint8_t *my_tone_status) {
+    uint8_t  mytone    = keycode - YM_TONE_MIN;
+    uint16_t mykeycode = mytone + MIDI_TONE_MIN;
+    // uint16_t mykeycode = keycode - YM_TONE_MIN;
+    // uint8_t  mytone    = mykeycode - MIDI_TONE_MIN;
+    uint8_t  velocity  = midi_config.velocity;
+    // uprintf("keycode=%u,mykeycode=%u,mytone =%u,velo = %u\n", keycode, mykeycode, mytone, velocity);
+    if (record->event.pressed) {
+        if (my_tone_status[mytone] == MIDI_INVALID_NOTE) {
+            uint8_t note = midi_compute_note(mykeycode);
+            midi_send_noteon(&midi_device, channel, note, velocity);
+            dprintf("midi noteon channel:%d note:%d mytone:%d velocity:%d\n", channel, note, mytone, velocity);
+            // uprintf("midi noteon channel:%d note:%d mytone:%d velocity:%d\n", channel, note, mytone, velocity);
+            my_tone_status[mytone] = note;  // store root_note status.
+        }
+    } else {
+        uint8_t note = my_tone_status[mytone];
+        if (note != MIDI_INVALID_NOTE) {
+            midi_send_noteoff(&midi_device, channel, note, velocity);
+            dprintf("midi noteoff channel:%d note:%d velocity:%d\n", channel, note, velocity);
+            // uprintf("midi noteoff channel:%d note:%d velocity:%d\n", channel, note, velocity);
+        }
+        my_tone_status[mytone] = MIDI_INVALID_NOTE;
+    }
+}
+
+void select_layer_state_set(void) {
+    switch (key_separator_col) {
+        case _KEY01:
+            if (is_trans_mode) {
+                layer_state_set(_LS_TRANS);
+            } else {
+                layer_state_set(_LS_BASE);
+            }
+            break;
+
+        case _KEY13:
+            if (is_trans_mode) {
+                layer_state_set(_LS_SEPALEFTOCT_T);
+            } else {
+                layer_state_set(_LS_SEPALEFTOCT);
+            }
+            break;
+
+        case _KEY19:
+            if (is_trans_mode) {
+                layer_state_set(_LS_SEPAHALF_T);
+            } else {
+                layer_state_set(_LS_SEPAHALF);
+            }
+            break;
+
+        case _KEY25:
+            if (is_trans_mode) {
+                layer_state_set(_LS_SEPARIGHTOCT_T);
+            } else {
+                layer_state_set(_LS_SEPARIGHTOCT);
+            }
+            break;
+
+        case _KEY37:
+            if (is_trans_mode) {
+                layer_state_set(_LS_FLIPTRANS);
+            } else {
+                layer_state_set(_LS_FLIPBASE);
+            }
+            break;
+    }
+}
+
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+    // uprintf("keycode=%u, YM_C_3=%u, YM_Db_2 =%u, YM_MIN = %u, YM_MAX = %u\n", keycode, YM_C_3, YM_Db_2, YM_TONE_MIN, YM_TONE_MAX);
+    switch (keycode) {
+        case VERSION: // Output firmware info.
+            if (record->event.pressed) {
+                SEND_STRING(QMK_KEYBOARD ":" QMK_KEYMAP " @ " QMK_VERSION " | " QMK_BUILDDATE);
+            }
+            break;
+
+        //  Layer-related settings.
+        //  reset_scale_indicator() first, followed by each modification, and then change the default layer.
+
+        //  1, separator column modification
+        case B_BASE:
+            if (record->event.pressed) {
+                reset_all();
+                key_separator_col = _KEY01;
+                select_layer_state_set();
+            }
+            break;
+
+        case B_LEFT:
+            if (record->event.pressed) {
+                reset_all();
+                key_separator_col = _KEY13;
+                select_layer_state_set();
+            }
+            break;
+
+        case B_CENTER:
+            if (record->event.pressed) {
+                reset_all();
+                key_separator_col = _KEY19;
+                select_layer_state_set();
+            }
+            break;
+
+        case B_RIGHT:
+            if (record->event.pressed) {
+                reset_all();
+                key_separator_col = _KEY25;
+                select_layer_state_set();
+            }
+            break;
+
+        case B_FLIP:
+            if (record->event.pressed) {
+                reset_all();
+                key_separator_col = _KEY37;
+                select_layer_state_set();
+            }
+            break;
+
+        //  2, Toggle scale shift mode and transpose mode
+        case TGLTRNS:
+            if (record->event.pressed) {
+                reset_scale_indicator();
+                is_trans_mode = !is_trans_mode;
+                select_layer_state_set();
+            }
+            break;
+
+        //  SHIFT_L and SHIFT_R can be pressed only when layer is either _BASE, _FLIPBASE.
+        case SHIFT_L:
+            if (record->event.pressed) {
+                switch (layer_state) {
+                    case _LS_BASE:
+                    case _LS_SEPALEFTOCT:
+                    case _LS_SEPAHALF:
+                    case _LS_SEPARIGHTOCT:
+                    case _LS_FLIPBASE:
+                        scale_indicator_col = shift_led_indicator_left(scale_indicator_col);
+                        break;
+                }
+            }
+            break;
+
+        case SHIFT_R:
+            if (record->event.pressed) {
+                switch (layer_state) {
+                    case _LS_BASE:
+                    case _LS_SEPALEFTOCT:
+                    case _LS_SEPAHALF:
+                    case _LS_SEPARIGHTOCT:
+                    case _LS_FLIPBASE:
+                        scale_indicator_col = shift_led_indicator_right(scale_indicator_col);
+                        break;
+                }
+            }
+            break;
+
+        case TGLINDI:
+            if (record->event.pressed) {
+                led_indicator_enable = !led_indicator_enable;
+            }
+            break;
+
+        case TGLINTR:
+            if (record->event.pressed) {
+                switch (layer_state) {
+                    //  main function of the TGLINTR part 1. alternate the status of trans_mode_indicator_loc_sel.
+                    case _LS_TRANS          | (1UL << _FN):
+                    case _LS_SEPALEFTOCT_T  | (1UL << _FN):
+                    case _LS_SEPAHALF_T     | (1UL << _FN):
+                    case _LS_SEPARIGHTOCT_T | (1UL << _FN):
+                        trans_mode_indicator_loc_sel = !trans_mode_indicator_loc_sel;
+
+                        //  when trans_mode_indicator_loc_sel == false, change the scale indicator and transpose.
+                        scale_indicator_col = trans_mode_indicator_loc_sel ? 0:1;
+                        // when TGLINTR is pressed, it also change the initial transpose setting to follow the scale indicator.
+                        if (scale_indicator_col == 1) {
+                            midi_config.transpose = -1;
+                        } else {
+                            midi_config.transpose = 0;
+                        }
+                        break;
+
+                    //  main function of the TGLINTR part 2. alternate the status of trans_mode_indicator_loc_sel.
+                    case _LS_FLIPTRANS      | (1UL << _FN):
+                        trans_mode_indicator_loc_sel = !trans_mode_indicator_loc_sel;
+
+                        //  when trans_mode_indicator_loc_sel == false, change the scale indicator and transpose.
+                        scale_indicator_col = trans_mode_indicator_loc_sel ? 0:11;
+                        // when TGLINTR is pressed, it also change the initial transpose setting to follow the scale indicator.
+                        if (scale_indicator_col == 11) {
+                            midi_config.transpose = -1;
+                        } else {
+                            midi_config.transpose = 0;
+                        }
+                        break;
+
+                    //  special treatment when TGLINTR is pressed in _LS_FLIPBASE layer.
+                    case _LS_FLIPBASE       | (1UL << _FN):   // when in FLIPBASE layer && non-Trans mode, change it to Trans mode.
+                        trans_mode_indicator_loc_sel = false;
+                        scale_indicator_col = 11;
+                        midi_config.transpose = -1;
+                        is_trans_mode = true;
+                        select_layer_state_set();
+                        break;
+
+
+                    //  special treatment when TGLINTR is pressed in other non-Trans layer.
+                    default :  // when other layers = non-Trans mode, change it to Trans mode.
+                        trans_mode_indicator_loc_sel = false;
+                        scale_indicator_col = 1;
+                        midi_config.transpose = -1;
+                        is_trans_mode = true;
+                        select_layer_state_set();
+                }
+            }
+            break;
+
+        case TGLCHGR:
+            if (record->event.pressed) {
+                use_alt_ch_gr = !use_alt_ch_gr;
+                if (use_alt_ch_gr) {
+                    midi_config.channel = ALT_MAIN_CH_NUMBER;
+                    midi_left_ch = ALT_SUB_CH_NUMBER;
+                } else {  //  default
+                    midi_config.channel = DEFAULT_MAIN_CH_NUMBER;
+                    midi_left_ch = DEFAULT_SUB_CH_NUMBER;
+                }
+            }
+            break;
+
+        case  YM_TONE_MIN ... YM_TONE_MAX:  // MY tone
+            // uprintf("keycode=%u, YM_C_3=%u, YM_Db_2 =%u, YM_MIN = %u, YM_MAX = %u\n", keycode, YM_C_3, YM_Db_2, YM_TONE_MIN, YM_TONE_MAX);
+            //  DO NOT THROW BELOW into 'if (record->event.pressed) {}' STATEMENT SINCE IT IS USED IN THE FUNCTION BELOW.
+            my_process_midi4single_note(midi_left_ch, keycode, record, my_tone_status);
+            break;
+    }
+    return true;
+}
+
+#ifdef RGB_MATRIX_ENABLE
+void set_led_scale_indicator(uint8_t r, uint8_t g, uint8_t b) {
+    uint8_t max_scale_indicator_led_loop;
+    uint8_t i;
+    if (led_indicator_enable) {  //  turn on indicators when enabled.
+        max_scale_indicator_led_loop = ( scale_indicator_col == DEFAULT_SCALE_COL ) ? 12 : 9;
+        for (i = 0; i < max_scale_indicator_led_loop; i++) {
+            rgb_matrix_set_color(led_scale_indicator[scale_indicator_col][i], r, g, b);
+        }
+    }
+}
+
+void rgb_matrix_indicators_user(void) {
+    // uint32_t mode = rgblight_get_mode();
+
+    if (rgb_matrix_is_enabled()) {  // turn the lights on when it is enabled.
+
+        // uint8_t max_scale_indicator_led_loop;
+        uint8_t i;
+
+        switch (layer_state) {
+            case _LS_BASE:
+                set_led_scale_indicator(BASE_LAYER_COLOR);
+                break;
+
+            case _LS_FLIPBASE:
+                set_led_scale_indicator(FLIPB_LAYER_COLOR);
+                for (i = 0; i < 3; i++) {
+                    rgb_matrix_set_color(led_single_col_indicator[_KEY37][i], FLIP_BORDER_COLOR);    //  right end
+                }
+                break;
+
+            case _LS_TRANS:
+                set_led_scale_indicator(TRANS_LAYER_COLOR);
+                break;
+
+            case _LS_SEPALEFTOCT_T:
+                set_led_scale_indicator(SEPALEFT_T_LAYER_COLOR);
+                for (i = 0; i < 3; i++) {
+                    rgb_matrix_set_color(led_single_col_indicator[_KEY13][i], FLIP_BORDER_COLOR);    //  Left
+                }
+                break;
+
+            case _LS_SEPAHALF_T:
+                set_led_scale_indicator(SEPAHALF_T_LAYER_COLOR);
+                for (i = 0; i < 3; i++) {
+                    rgb_matrix_set_color(led_single_col_indicator[_KEY19][i], FLIP_BORDER_COLOR);    //  Center
+                }
+                break;
+
+            case _LS_SEPARIGHTOCT_T:
+                set_led_scale_indicator(SEPARIGHT_T_LAYER_COLOR);
+                for (i = 0; i < 3; i++) {
+                    rgb_matrix_set_color(led_single_col_indicator[_KEY25][i], FLIP_BORDER_COLOR);    //  Right
+                }
+                break;
+
+            case _LS_FLIPTRANS:
+                set_led_scale_indicator(FLIPT_LAYER_COLOR);
+                for (i = 0; i < 3; i++) {
+                    rgb_matrix_set_color(led_single_col_indicator[_KEY37][i], FLIP_BORDER_COLOR);    //  right end
+                }
+                break;
+
+            case _LS_SEPALEFTOCT:
+                set_led_scale_indicator(SEPALEFT_LAYER_COLOR);
+                for (i = 0; i < 3; i++) {
+                    rgb_matrix_set_color(led_single_col_indicator[_KEY13][i], FLIP_BORDER_COLOR);    //  Left
+                }
+                break;
+
+            case _LS_SEPAHALF:
+                set_led_scale_indicator(SEPAHALF_LAYER_COLOR);
+                for (i = 0; i < 3; i++) {
+                    rgb_matrix_set_color(led_single_col_indicator[_KEY19][i], FLIP_BORDER_COLOR);    //  Center
+                }
+                break;
+
+            case _LS_SEPARIGHTOCT:
+                set_led_scale_indicator(SEPARIGHT_LAYER_COLOR);
+                for (i = 0; i < 3; i++) {
+                    rgb_matrix_set_color(led_single_col_indicator[_KEY25][i], FLIP_BORDER_COLOR);    //  Right
+                }
+                break;
+
+            case _LS_FN ... _LS_MAX:  //  When Mute Button is long-pressed, the previous layers are still active.
+                for (i = 1; i < 5; i++) {
+                    rgb_matrix_set_color(i, RGB_DARKSPRINGGREEN);  //  up(1) down(4) left(3) right(2)  keys
+                }
+                rgb_matrix_set_color(led_single_col_indicator[_KEY02][0], RGB_DARKSPRINGGREEN);   //  TGLTRNS
+                rgb_matrix_set_color(led_single_col_indicator[_KEY04][0], RGB_DARKSPRINGGREEN);   //  TGLINTR
+                rgb_matrix_set_color(led_single_col_indicator[_KEY06][0], RGB_DARKSPRINGGREEN);   //  TGLCHGR
+
+                for (i = 0; i < 3; i++) {
+                    rgb_matrix_set_color(led_single_col_indicator[_KEY01][i], BASE_LAYER_COLOR);   //  B_BASE
+
+                    rgb_matrix_set_color(led_single_col_indicator[_KEY13][i], SEPALEFT_LAYER_COLOR);   //  B_LEFT
+
+                    rgb_matrix_set_color(led_single_col_indicator[_KEY19][i], SEPAHALF_LAYER_COLOR);   //  B_CENTER
+
+                    rgb_matrix_set_color(led_single_col_indicator[_KEY25][i], SEPARIGHT_LAYER_COLOR);   //  B_RIGHT
+
+                    rgb_matrix_set_color(led_single_col_indicator[_KEY37][i], FLIPB_LAYER_COLOR);   //  B_FLIP
+                }
+
+                for (i = _KEY12; i < _KEY37; i+=2){  //  even numbers from _KEY12 to _KEY36 are LED related settings.
+                    // turn on the bottom row only to keep the visibility of the RGB MATRIX effects.
+                    rgb_matrix_set_color(led_single_col_indicator[i][0], RGB_DARKSPRINGGREEN);  //       //  LED related settings.
+                }
+                break;
+        }
+    }
+}
+#endif  // RGB_MATRIX_ENABLE
diff --git a/keyboards/chromatonemini/keymaps/led/readme.md b/keyboards/chromatonemini/keymaps/led/readme.md
new file mode 100644
index 0000000000..ed6cfd6040
--- /dev/null
+++ b/keyboards/chromatonemini/keymaps/led/readme.md
@@ -0,0 +1 @@
+# The LED enabled, customized keymap for chromatonemini
diff --git a/keyboards/chromatonemini/keymaps/led/rules.mk b/keyboards/chromatonemini/keymaps/led/rules.mk
new file mode 100644
index 0000000000..2e67e80675
--- /dev/null
+++ b/keyboards/chromatonemini/keymaps/led/rules.mk
@@ -0,0 +1,3 @@
+RGB_MATRIX_ENABLE = yes     # Use RGB matrix (Don't enable this when RGBLIGHT_ENABLE is used.)
+RGB_MATRIX_CUSTOM_KB = yes  #
+VIA_ENABLE = no             # too many layers to use VIA...