Custom Keyboard XD60 - Use RGB Underglow to Indicate Caps Lock and Layers

keymap.c

#include QMK_KEYBOARD_H

// Helpful Defines
#define _______    KC_TRNS
#define FN_CAPS    LT(1, KC_CAPS)
#define LSFT_GRV   LSFT_T(KC_GRV)
#define RSFT_SLSH  RSFT_T(KC_SLSH)
#define RSFT_UP    RSFT_T(KC_UP)

// Mac Keyboard Shorts
#define SCR2DSK    LSFT(LGUI(KC_3))        // Take screenshot and save to desktop
#define SCR2CLP    LCTL(LSFT(LGUI(KC_4)))  // Take screenshot of selected area to clipboard
#define FINDER     LALT(LGUI(KC_SPACE))    // Open finder (Fn + E simulates Win + E)
#define FULLSCR    LCTL(LGUI(KC_F))        // Toggle full screen
#define LOCKSCR    LCTL(LGUI(KC_Q))        // Lock screen (Fn + L simulates Win + L)

// Layers
#define L_QWERTY   0
#define L_FUNCTION 1

// Status Variables
static uint8_t layer = L_QWERTY;
static uint8_t caps  = 0;

// Used to check underglow status
extern rgblight_config_t rgblight_config;

const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
    // QWERTY Layer
    [0] = LAYOUT_all(
         KC_ESC,     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_DEL, 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,          KC_BSLS,
        FN_CAPS,     KC_A,    KC_S,     KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L, KC_SCLN, KC_QUOT,     KC_NO,           KC_ENT,
        KC_LSFT, LSFT_GRV,    KC_Z,     KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M, KC_COMM,  KC_DOT,   KC_NO, RSFT_SLSH, RSFT_UP,   TO(1),
        KC_LCTL,  KC_LALT, KC_LGUI,                              KC_SPC,                            KC_RGUI,   MO(1),   KC_LEFT, KC_DOWN, KC_RGHT),
    // Function Layer
    [1] = LAYOUT_all(
         KC_GRV,    KC_F1,   KC_F2,    KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_F7,   KC_F8,   KC_F9,  KC_F10,  KC_F11,    KC_F12, _______, _______,
        _______,  _______, SCR2DSK,   FINDER, _______, _______,  KC_INS, KC_PGUP, KC_PGDN, _______, KC_MPLY, KC_MRWD,   KC_MFFD,            RESET,
        _______,    KC_F4, SCR2CLP,   KC_F11, FULLSCR, _______, KC_HOME,  KC_END, _______, LOCKSCR,  KC_F14,  KC_F15,     KC_NO,          KC_BTN1,
        _______,  _______, RGB_MOD, RGB_RMOD, _______, _______, _______, _______, KC_MUTE, KC_VOLD, KC_VOLU,   KC_NO,   _______, KC_MS_U,   TO(0),
        _______,  _______, _______,                             _______,                            _______, _______,   KC_MS_L, KC_MS_D, KC_MS_R)
};

// Set underglow color base on caps lock state and layer
// Use _noeeprom methods to prevent underglow from enabling on restart.
// Color predefinitions in /quantum/rgblight_list.h
void set_underglow(void) {
    if (layer == L_QWERTY && caps == 0) {
        rgblight_disable_noeeprom();
        return;
    }

    if (!rgblight_config.enable) rgblight_enable_noeeprom();
    if (rgblight_config.mode != 1) rgblight_mode_noeeprom(1);

    switch (layer) {
    case L_QWERTY:
        if (caps == 0) {
            // rgblight_disable_noeeprom();
        } else {
            rgblight_sethsv_noeeprom_coral();
        }
        break;
    case L_FUNCTION:
        if (caps == 0) {
            rgblight_sethsv_noeeprom_turquoise();
        } else {
            rgblight_sethsv_noeeprom_magenta();
        }
        break;
    default:
        rgblight_disable_noeeprom();
        break;
    }
}

// Update layer and set underglow
uint32_t layer_state_set_user(uint32_t state) {
    int new_layer = biton32(state);
    if (layer != new_layer) {
        layer = new_layer;
        set_underglow();
    }
    return state;
}

// Update caps lock status and set underglow
void led_set_user(uint8_t usb_led) {
    int new_caps = usb_led & (1<<USB_LED_CAPS_LOCK);
    if (caps != new_caps) {
        caps = new_caps;
        set_underglow();
    }
}

New updates will be in github repository: https://github.com/limingjie/CustomKeyboard/blob/master/keyboards/xd60/keymaps/mac_xd60_65_keys/keymap.c