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- /**
- * 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 <https://www.gnu.org/licenses/>.
- *
- */
-
- /**
- * Hotend Idle Timeout
- * Prevent filament in the nozzle from charring and causing a critical jam.
- */
-
- #include "../inc/MarlinConfig.h"
-
- #if ENABLED(HOTEND_IDLE_TIMEOUT)
-
- #include "hotend_idle.h"
- #include "../gcode/gcode.h"
-
- #include "../module/temperature.h"
- #include "../module/motion.h"
- #include "../module/planner.h"
- #include "../lcd/marlinui.h"
-
- extern HotendIdleProtection hotend_idle;
-
- millis_t HotendIdleProtection::next_protect_ms = 0;
-
- void HotendIdleProtection::check_hotends(const millis_t &ms) {
- bool do_prot = false;
- HOTEND_LOOP() {
- const bool busy = (TERN0(HAS_RESUME_CONTINUE, wait_for_user) || planner.has_blocks_queued());
- if (thermalManager.degHotend(e) >= (HOTEND_IDLE_MIN_TRIGGER) && !busy) {
- do_prot = true; break;
- }
- }
- if (bool(next_protect_ms) != do_prot)
- next_protect_ms = do_prot ? ms + hp_interval : 0;
- }
-
- void HotendIdleProtection::check_e_motion(const millis_t &ms) {
- static float old_e_position = 0;
- if (old_e_position != current_position.e) {
- old_e_position = current_position.e; // Track filament motion
- if (next_protect_ms) // If some heater is on then...
- next_protect_ms = ms + hp_interval; // ...delay the timeout till later
- }
- }
-
- void HotendIdleProtection::check() {
- const millis_t ms = millis(); // Shared millis
-
- check_hotends(ms); // Any hotends need protection?
- check_e_motion(ms); // Motion will protect them
-
- // Hot and not moving for too long...
- if (next_protect_ms && ELAPSED(ms, next_protect_ms))
- timed_out();
- }
-
- // Lower (but don't raise) hotend / bed temperatures
- void HotendIdleProtection::timed_out() {
- next_protect_ms = 0;
- SERIAL_ECHOLNPGM("Hotend Idle Timeout");
- LCD_MESSAGE(MSG_HOTEND_IDLE_TIMEOUT);
- HOTEND_LOOP() {
- if ((HOTEND_IDLE_NOZZLE_TARGET) < thermalManager.degTargetHotend(e))
- thermalManager.setTargetHotend(HOTEND_IDLE_NOZZLE_TARGET, e);
- }
- #if HAS_HEATED_BED
- if ((HOTEND_IDLE_BED_TARGET) < thermalManager.degTargetBed())
- thermalManager.setTargetBed(HOTEND_IDLE_BED_TARGET);
- #endif
- }
-
- #endif // HOTEND_IDLE_TIMEOUT
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