2017-07-19 01:29:06 +02:00
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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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/**
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* Endstop Interrupts
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*
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* Without endstop interrupts the endstop pins must be polled continually in
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* the stepper-ISR via endstops.update(), most of the time finding no change.
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* With this feature endstops.update() is called only when we know that at
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* least one endstop has changed state, saving valuable CPU cycles.
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*
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* This feature only works when all used endstop pins can generate an 'external interrupt'.
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*
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* Test whether pins issue interrupts on your board by flashing 'pin_interrupt_test.ino'.
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* (Located in Marlin/buildroot/share/pin_interrupt_test/pin_interrupt_test.ino)
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*/
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2018-04-13 03:25:08 +02:00
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#ifndef _ENDSTOP_INTERRUPTS_H_
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#define _ENDSTOP_INTERRUPTS_H_
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volatile uint8_t e_hit = 0; // Different from 0 when the endstops should be tested in detail.
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// Must be reset to 0 by the test function when finished.
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// This is what is really done inside the interrupts.
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FORCE_INLINE void endstop_ISR_worker( void ) {
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e_hit = 2; // Because the detection of a e-stop hit has a 1 step debouncer it has to be called at least twice.
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}
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// One ISR for all EXT-Interrupts
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void endstop_ISR(void) { endstop_ISR_worker(); }
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2017-07-19 01:29:06 +02:00
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/**
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* Endstop interrupts for Due based targets.
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* On Due, all pins support external interrupt capability.
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*/
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void setup_endstop_interrupts(void) {
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#if HAS_X_MAX
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attachInterrupt(digitalPinToInterrupt(X_MAX_PIN), endstop_ISR, CHANGE); // assign it
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#endif
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#if HAS_X_MIN
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attachInterrupt(digitalPinToInterrupt(X_MIN_PIN), endstop_ISR, CHANGE);
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#endif
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#if HAS_Y_MAX
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attachInterrupt(digitalPinToInterrupt(Y_MAX_PIN), endstop_ISR, CHANGE);
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#endif
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#if HAS_Y_MIN
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attachInterrupt(digitalPinToInterrupt(Y_MIN_PIN), endstop_ISR, CHANGE);
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#endif
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#if HAS_Z_MAX
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attachInterrupt(digitalPinToInterrupt(Z_MAX_PIN), endstop_ISR, CHANGE);
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#endif
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#if HAS_Z_MIN
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attachInterrupt(digitalPinToInterrupt(Z_MIN_PIN), endstop_ISR, CHANGE);
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#endif
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#if HAS_Z2_MAX
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attachInterrupt(digitalPinToInterrupt(Z2_MAX_PIN), endstop_ISR, CHANGE);
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#endif
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#if HAS_Z2_MIN
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attachInterrupt(digitalPinToInterrupt(Z2_MIN_PIN), endstop_ISR, CHANGE);
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#endif
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#if HAS_Z_MIN_PROBE_PIN
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attachInterrupt(digitalPinToInterrupt(Z_MIN_PROBE_PIN), endstop_ISR, CHANGE);
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#endif
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}
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#endif //_ENDSTOP_INTERRUPTS_H_
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