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/**
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* Marlin 3D Printer Firmware
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* Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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*
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* Based on Sprinter and grbl.
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* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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/**
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* Hotend Idle Timeout
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* Prevent filament in the nozzle from charring and causing a critical jam.
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*/
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#include "../inc/MarlinConfig.h"
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#if ENABLED(HOTEND_IDLE_TIMEOUT)
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#include "hotend_idle.h"
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#include "../gcode/gcode.h"
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#include "../module/temperature.h"
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#include "../module/motion.h"
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#include "../lcd/ultralcd.h"
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extern HotendIdleProtection hotend_idle;
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millis_t HotendIdleProtection::next_protect_ms = 0;
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void HotendIdleProtection::check_hotends(const millis_t &ms) {
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bool do_prot = false;
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HOTEND_LOOP() {
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if (thermalManager.degHotend(e) >= HOTEND_IDLE_MIN_TRIGGER) {
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do_prot = true; break;
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}
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}
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if (bool(next_protect_ms) != do_prot)
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next_protect_ms = do_prot ? ms + hp_interval : 0;
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}
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void HotendIdleProtection::check_e_motion(const millis_t &ms) {
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static float old_e_position = 0;
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if (old_e_position != current_position.e) {
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old_e_position = current_position.e; // Track filament motion
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if (next_protect_ms) // If some heater is on then...
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next_protect_ms = ms + hp_interval; // ...delay the timeout till later
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}
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}
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void HotendIdleProtection::check() {
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const millis_t ms = millis(); // Shared millis
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check_hotends(ms); // Any hotends need protection?
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check_e_motion(ms); // Motion will protect them
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// Hot and not moving for too long...
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if (next_protect_ms && ELAPSED(ms, next_protect_ms))
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timed_out();
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}
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// Lower (but don't raise) hotend / bed temperatures
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void HotendIdleProtection::timed_out() {
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next_protect_ms = 0;
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SERIAL_ECHOLNPGM("Hotend Idle Timeout");
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LCD_MESSAGEPGM(MSG_HOTEND_IDLE_TIMEOUT);
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HOTEND_LOOP() {
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if ((HOTEND_IDLE_NOZZLE_TARGET) < thermalManager.degTargetHotend(e))
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thermalManager.setTargetHotend(HOTEND_IDLE_NOZZLE_TARGET, e);
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}
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#if HAS_HEATED_BED
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if ((HOTEND_IDLE_BED_TARGET) < thermalManager.degTargetBed())
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thermalManager.setTargetBed(HOTEND_IDLE_BED_TARGET);
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#endif
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}
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#endif // HOTEND_IDLE_TIMEOUT
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