Function loop

Marlin/src/MarlinCore.cpp:1722–1744

* The main Marlin program loop * * - Call idle() to handle all tasks between G-code commands * Note that no G-codes from the queue can be executed during idle() * but many G-codes can be called directly anytime like macros. * - Check whether SD card auto-start is needed now. * - Check whether SD print finishing is needed now. * - Run one G-code command from the immediate or ma

 *    as long as idle() or manage_inactivity() are being called.
 */
void loop() {
  do {
    idle();

    #if HAS_MEDIA
      if (card.flag.abort_sd_printing) abortSDPrinting();
      if (marlin_state == MarlinState::MF_SD_COMPLETE) finishSDPrinting();
    #endif

    queue.advance();

    #if ANY(POWER_OFF_TIMER, POWER_OFF_WAIT_FOR_COOLDOWN)
      powerManager.checkAutoPowerOff();
    #endif

    endstops.event_handler();

    TERN_(HAS_TFT_LVGL_UI, printer_state_polling());

    TERN_(MARLIN_TEST_BUILD, runPeriodicTests());

  } while (ENABLED(__AVR__)); // Loop forever on slower (AVR) boards
}