text: /**
   * Marlin 3D Printer Firmware
   * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
   *
   * Based on Sprinter and grbl.
   * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
   *
   * 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 3 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/>.
   *
   */
  
  /**
   * Marlin RGB LED general support
   */
  
  #include "../../inc/MarlinConfig.h"
  
  #if ENABLED(TEMP_STAT_LEDS)
  
  #include "tempstat.h"
  #include "../../module/temperature.h"
  
  void handle_status_leds() {
    static int8_t old_red = -1;  // Invalid value to force LED initialization
    static millis_t next_status_led_update_ms = 0;
    if (ELAPSED(millis(), next_status_led_update_ms)) {
      next_status_led_update_ms += 500; // Update every 0.5s
      float max_temp = 0.0;
      #if HAS_HEATED_BED
        max_temp = _MAX(thermalManager.degTargetBed(), thermalManager.degBed());
      #endif
      HOTEND_LOOP()
        max_temp = _MAX(max_temp, thermalManager.degHotend(e), thermalManager.degTargetHotend(e));
      const int8_t new_red = (max_temp > 55.0) ? HIGH : (max_temp < 54.0 || old_red < 0) ? LOW : old_red;
      if (new_red != old_red) {
        old_red = new_red;
        #if PIN_EXISTS(STAT_LED_RED)
          WRITE(STAT_LED_RED_PIN, new_red);
        #endif
        #if PIN_EXISTS(STAT_LED_BLUE)
          WRITE(STAT_LED_BLUE_PIN, !new_red);
        #endif
      }
    }
  }
  
  #endif // TEMP_STAT_LEDS
  