qmk_firmware/keyboards/cutie_club/wraith/keymaps/timer/keymap.c

/* Copyright 2019 Amber Holly
 *
 * 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

int layer_time_remaining;
uint16_t prev_loop_time;

// Defines the keycodes used by our macros in process_record_user
enum custom_keycodes {
   TIME_TOGGLE = SAFE_RANGE
};

const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
  [0] = LAYOUT_all(
    KC_ESC,    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_BRK,
    KC_GRV,    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_INS,
    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_DEL,
    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_BSLS,   KC_ENT,     TIME_TOGGLE,
    KC_LSFT,   KC_NUBS,  KC_Z,     KC_X,     KC_C,     KC_V,     KC_B,     KC_N,     KC_M,     KC_COMM,  KC_DOT,    KC_SLSH,   KC_RSFT,   KC_UP,      KC_RGUI,
    KC_CAPS,             KC_LALT,                                          KC_SPC,                                  KC_RALT,   KC_LEFT,   KC_DOWN,    KC_RGHT
  ),
  [1] = LAYOUT_all(
    QK_BOOT,    KC_F13,     KC_F14,     KC_F15,     KC_F16,     KC_F17,     KC_F18,     KC_F19,     KC_F20,     KC_F21,     KC_F22,     KC_F23,     KC_F24,     _______,    _______,
    _______,    _______,    _______,    _______,    _______,    _______,    _______,    _______,    _______,    _______,    _______,    _______,    _______,    _______,    _______,
    _______,    _______,    _______,    _______,    _______,    _______,    _______,    _______,    _______,    _______,    _______,    _______,    _______,                _______,
    _______,    _______,    _______,    _______,    _______,    _______,    _______,    _______,    _______,    _______,    _______,    _______,    _______,    _______,    KC_TRNS,
    _______,    _______,    _______,    _______,    _______,    _______,    _______,    _______,    _______,    _______,    _______,    _______,    _______,    _______,    _______,
    _______,                _______,                                        _______,                                                    KC_MPLY,    KC_MPRV,    _______,    KC_MNXT
  )
};

void matrix_scan_user(void) {
  layer_time_remaining -= timer_read()-prev_loop_time; //amount of time elapsed since the start of the previous loop
  prev_loop_time = timer_read(); //start counting the time to check at the next iteration

  if (layer_time_remaining <= 0) {
  	// once timer run out
  	layer_off(LAYER_SWITCH);
  }

  // escape LED on layer 1
  if (IS_LAYER_ON(LAYER_SWITCH)) {
    if (layer_time_remaining <= TIMEOUT_WARNING) {
      if ((int)(layer_time_remaining/GET_FLASH_PERIOD % 2 == 0)) {
		    // if even led on
		    writePinLow(B0);
		  } else {
		    writePinHigh(B0);
		  }
    } else {
      writePinLow(B0);
    }
  } else {
    writePinHigh(B0);
  }
}

bool process_record_user(uint16_t keycode, keyrecord_t *record) {
  switch (keycode) {
    case TIME_TOGGLE:
			// get the time when time toggle pressed
			layer_time_remaining = LAYER_TIMEOUT;
			// set the layer
			layer_on(LAYER_SWITCH);
    break;
  }
  return true;
};