51 lines
1.7 KiB
C
51 lines
1.7 KiB
C
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/**
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* Marlin 3D Printer Firmware
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* Copyright (C) 2016 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 <http://www.gnu.org/licenses/>.
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*
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*/
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inline void select_multiplexed_stepper(const uint8_t e) {
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stepper.synchronize();
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disable_e_steppers();
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WRITE(E_MUX0_PIN, TEST(e, 0) ? HIGH : LOW);
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WRITE(E_MUX1_PIN, TEST(e, 1) ? HIGH : LOW);
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WRITE(E_MUX2_PIN, TEST(e, 2) ? HIGH : LOW);
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safe_delay(100);
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}
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/**
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* M702: Unload all extruders
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*/
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void gcode_M702() {
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for (uint8_t s = 0; s < E_STEPPERS; s++) {
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select_multiplexed_stepper(e);
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// TODO: standard unload filament function
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// MK2 firmware behavior:
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// - Make sure temperature is high enough
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// - Raise Z to at least 15 to make room
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// - Extrude 1cm of filament in 1 second
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// - Under 230C quickly purge ~12mm, over 230C purge ~10mm
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// - Change E max feedrate to 80, eject the filament from the tube. Sync.
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// - Restore E max feedrate to 50
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}
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// Go back to the last active extruder
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select_multiplexed_stepper(active_extruder);
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disable_e_steppers();
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}
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