[Keyboard] Adding AEK64 keyboard (#6725)

* Adding AEK64 keyboard

* Deleting useless layout definition

* Resolving many code review issues

* Documenting my 4sStylZ keymap

* Adding default keymap

* Apply suggestions from code review

Code review corrections

Co-Authored-By: noroadsleft <18669334+noroadsleft@users.noreply.github.com>
Co-Authored-By: fauxpark <fauxpark@gmail.com>

* Update keyboards/handwired/aek64/readme.md

Co-Authored-By: noroadsleft <18669334+noroadsleft@users.noreply.github.com>

* Correcting the NKRO implementation

1 files changed, 102 insertions, 0 deletions

diff --git a/keyboards/handwired/aek64/keymaps/4sstylz/keymap.c b/keyboards/handwired/aek64/keymaps/4sstylz/keymap.c
new file mode 100644
index 0000000000..65f8354aab
--- /dev/null
+++ b/keyboards/handwired/aek64/keymaps/4sstylz/keymap.c
@@ -0,0 +1,102 @@
+#include QMK_KEYBOARD_H
+
+// Implement Super-alt↯tab
+// See https://docs.qmk.fm/#/feature_macros?id=super-alt↯tab
+bool is_alt_tab_active = false;
+uint16_t alt_tab_timer = 0;
+
+// Defining all the custom keycodes.
+enum custom_keycodes {
+  ALT_TAB = SAFE_RANGE
+};
+
+const uint16_t PROGMEM lock_combo[] = {KC_J, KC_K, KC_L, KC_SCLN, COMBO_END};
+combo_t key_combos[COMBO_COUNT] = {COMBO(lock_combo, LGUI(KC_O))};
+
+// Define the keycodes for one qwerty layer and one Fn layer.
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+  /* 0: qwerty
+   * ┌──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬─────────────┐
+   * │ ` Esc│   1  │   2  │   3  │   4  │   5  │   6  │   7  │   8  │   9  │   0  │  -   │  =   │ Bksp        │
+   * ├─────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼─────┬───────┤
+   * │ Tab         │   Q  │   W  │   E  │   R  │   T  │   Y  │   U  │   I  │   O  │   P  │  [   │  ]  │       │
+   * ├─────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼─────┴┐ Enter│
+   * │ Layer 2     │   A  │   S  │   D  │   F  │   G  │   H  │   J  │   K  │   L  │   ;  │   '  │   #  │      │
+   * ├──────┬──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┴──────┴──────┤
+   * │ Shift│  \   │   Z  │   X  │   C  │   V  │   B  │   N  │   M  │   ,  │   .  │   /  │        Shift       │
+   * ├──────┼──────┼──────┼──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┼──────┬──────┬──────┤
+   * │ Ctrl │ Alt  │↯ATab │                            Space                             │ Gui  │ Alt  │ Ctrl │
+   * └──────┴──────┴──────┴──────────────────────────────────────────────────────────────┴──────┴──────┴──────┘
+   *
+   * Hidden features : 
+   *  - Left Shift is also Home on a single tap.
+   *  - Left Ctrl is also End on a single tap.
+   *  - Right Shift is also page-up on a single tap.
+   *  - Right Ctrl is also page-down on a single tap.
+   *  - Press JKLM for Windows + L (Session lock)
+   */
+  [0] = LAYOUT( \
+    KC_GESC        , KC_1   , KC_2   , KC_3 , KC_4 , KC_5 , KC_6  , KC_7 , KC_8 , KC_9   , KC_0   , KC_MINS, KC_EQL , KC_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_RBRC,
+    MO(1)          , KC_A   , KC_S   , KC_D , KC_F , KC_G , KC_H  , KC_J , KC_K , KC_L   , KC_SCLN, KC_QUOT, KC_NUHS, KC_ENT ,
+    KC_LSPO        , KC_NUBS, KC_Z   , KC_X , KC_C , KC_V , KC_B  , KC_N , KC_M , KC_COMM, KC_DOT , KC_SLSH, KC_RSPC         ,
+    KC_LCPO        , KC_LALT, ALT_TAB,                      KC_SPC,                                 KC_LGUI, KC_RALT, KC_RCPC
+  ),
+
+  /* 1: second layer for media keys and many advanced features ç
+   * ┌──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬──────┬─────────────┐
+   * │Alt F4│  F1  │  F2  │  F3  │  F4  │  F5  │  F6  │  F7  │  F8  │  F9  │  F10 │  F11 │  F12 │             │
+   * ├──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼─────┬───────┤
+   * │      │      │      │PrtScn│ Brt+ │ Brt- │Ctrl A│ Home │  Up  │  End │   ‽   │  ↑      │  ⸮    │     │       │
+   * ├─────────────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼─────┴┐      │
+   * │             │ Cut  │ Copy │Paste │ Del  │ Del  │ Left │ Down │Right │  ←   │  ↓   │  →   │      │      │
+   * ├──────┬──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┼──────┴──────┴──────┤
+   * │      │      │ Mute │ Vol- │ Vol+ │      │      │      │      │      │      │Reset │                    │
+   * ├──────┼──────┼──────┼──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┴──────┼──────┬──────┬──────┤
+   * │      │      │      │                                                              │      │      │      │
+   * └──────┴──────┴──────┴──────────────────────────────────────────────────────────────┴──────┴──────┴──────┘
+   */
+  [1] = LAYOUT( \
+    LALT(KC_F4), 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_PSCR     , KC_BRIU     , KC_BRID, LCTL(KC_A), KC_HOME, KC_UP  , KC_END  , UC(0x203D) , UC(0x8593), UC(0x2E2E),
+    _______    , _______   , LSFT(KC_DEL), LCTL(KC_INS), LSFT(KC_INS), KC_DEL , KC_DEL    , KC_LEFT, KC_DOWN, KC_RIGHT, UC(0x8592) , UC(0x8595), UC(0x8594), _______,
+    _______    , _______   , KC_MUTE     , KC_VOLD     , KC_VOLU     , _______, _______   , _______, _______, _______ , _______    , RESET     , _______            ,
+    _______    , _______   , _______     ,                             _______,                                                      _______   , _______   , _______
+  )
+};
+
+// Set the unicode input mode for using UC.
+void matrix_init_user(void) {
+  set_unicode_input_mode(UC_LNX);
+}
+
+// Processing all the key pressed.
+// Alt+tab.
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+
+  // Depending keycodes…
+  switch (keycode) { // This will do most of the grunt work with the keycodes.
+    case ALT_TAB:
+      if (record->event.pressed) {
+        if (!is_alt_tab_active) {
+          is_alt_tab_active = true;
+          register_code(KC_LALT);
+        }
+        alt_tab_timer = timer_read();
+        register_code(KC_TAB);
+      } else {
+        unregister_code(KC_TAB);
+      }
+      break;
+  }
+  return true;
+}
+
+void matrix_scan_user(void) {     // The very important timer.
+  if (is_alt_tab_active) {
+    if (timer_elapsed(alt_tab_timer) > 750) {
+      unregister_code(KC_LALT);
+      is_alt_tab_active = false;
+    }
+  }
+}