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208 lines
6.5 KiB
208 lines
6.5 KiB
/**
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* Marlin 3D Printer Firmware
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*
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* Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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* SAMD51 HAL developed by Giuliano Zaro (AKA GMagician)
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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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#pragma once
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/**
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* Endstop interrupts for ATMEL SAMD51 based targets.
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*
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* On SAMD51, all pins support external interrupt capability.
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* Any pin can be used for external interrupts, but there are some restrictions.
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* At most 16 different external interrupts can be used at one time.
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* Further, you can’t just pick any 16 pins to use. This is because every pin on the SAMD51
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* connects to what is called an EXTINT line, and only one pin per EXTINT line can be used for external
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* interrupts at a time
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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 temperature-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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#include "../../module/endstops.h"
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#define MATCH_EILINE(P1,P2) (P1 != P2 && PIN_TO_EILINE(P1) == PIN_TO_EILINE(P2))
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#if HAS_X_MAX
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#define MATCH_X_MAX_EILINE(P) MATCH_EILINE(P, X_MAX_PIN)
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#else
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#define MATCH_X_MAX_EILINE(P) false
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#endif
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#if HAS_X_MIN
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#define MATCH_X_MIN_EILINE(P) MATCH_EILINE(P, X_MIN_PIN)
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#else
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#define MATCH_X_MIN_EILINE(P) false
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#endif
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#if HAS_Y_MAX
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#define MATCH_Y_MAX_EILINE(P) MATCH_EILINE(P, Y_MAX_PIN)
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#else
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#define MATCH_Y_MAX_EILINE(P) false
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#endif
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#if HAS_Y_MIN
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#define MATCH_Y_MIN_EILINE(P) MATCH_EILINE(P, Y_MIN_PIN)
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#else
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#define MATCH_Y_MIN_EILINE(P) false
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#endif
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#if HAS_Z_MAX
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#define MATCH_Z_MAX_EILINE(P) MATCH_EILINE(P, Z_MAX_PIN)
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#else
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#define MATCH_Z_MAX_EILINE(P) false
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#endif
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#if HAS_Z_MIN
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#define MATCH_Z_MIN_EILINE(P) MATCH_EILINE(P, Z_MIN_PIN)
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#else
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#define MATCH_Z_MIN_EILINE(P) false
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#endif
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#if HAS_Z2_MAX
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#define MATCH_Z2_MAX_EILINE(P) MATCH_EILINE(P, Z2_MAX_PIN)
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#else
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#define MATCH_Z2_MAX_EILINE(P) false
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#endif
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#if HAS_Z2_MIN
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#define MATCH_Z2_MIN_EILINE(P) MATCH_EILINE(P, Z2_MIN_PIN)
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#else
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#define MATCH_Z2_MIN_EILINE(P) false
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#endif
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#if HAS_Z3_MAX
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#define MATCH_Z3_MAX_EILINE(P) MATCH_EILINE(P, Z3_MAX_PIN)
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#else
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#define MATCH_Z3_MAX_EILINE(P) false
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#endif
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#if HAS_Z3_MIN
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#define MATCH_Z3_MIN_EILINE(P) MATCH_EILINE(P, Z3_MIN_PIN)
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#else
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#define MATCH_Z3_MIN_EILINE(P) false
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#endif
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#if HAS_Z4_MAX
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#define MATCH_Z4_MAX_EILINE(P) MATCH_EILINE(P, Z4_MAX_PIN)
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#else
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#define MATCH_Z4_MAX_EILINE(P) false
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#endif
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#if HAS_Z4_MIN
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#define MATCH_Z4_MIN_EILINE(P) MATCH_EILINE(P, Z4_MIN_PIN)
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#else
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#define MATCH_Z4_MIN_EILINE(P) false
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#endif
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#if HAS_Z_MIN_PROBE_PIN
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#define MATCH_Z_MIN_PROBE_EILINE(P) MATCH_EILINE(P, Z_MIN_PROBE_PIN)
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#else
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#define MATCH_Z_MIN_PROBE_EILINE(P) false
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#endif
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#define AVAILABLE_EILINE(P) (PIN_TO_EILINE(P) != -1 \
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&& !MATCH_X_MAX_EILINE(P) && !MATCH_X_MIN_EILINE(P) \
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&& !MATCH_Y_MAX_EILINE(P) && !MATCH_Y_MIN_EILINE(P) \
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&& !MATCH_Z_MAX_EILINE(P) && !MATCH_Z_MIN_EILINE(P) \
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&& !MATCH_Z2_MAX_EILINE(P) && !MATCH_Z2_MIN_EILINE(P) \
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&& !MATCH_Z3_MAX_EILINE(P) && !MATCH_Z3_MIN_EILINE(P) \
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&& !MATCH_Z4_MAX_EILINE(P) && !MATCH_Z4_MIN_EILINE(P) \
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&& !MATCH_Z_MIN_PROBE_EILINE(P))
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// One ISR for all EXT-Interrupts
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void endstop_ISR() { endstops.update(); }
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void setup_endstop_interrupts() {
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#define _ATTACH(P) attachInterrupt(P, endstop_ISR, CHANGE)
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#if HAS_X_MAX
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#if !AVAILABLE_EILINE(X_MAX_PIN)
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#error "X_MAX_PIN has no EXTINT line available."
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#endif
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_ATTACH(X_MAX_PIN);
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#endif
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#if HAS_X_MIN
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#if !AVAILABLE_EILINE(X_MIN_PIN)
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#error "X_MIN_PIN has no EXTINT line available."
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#endif
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_ATTACH(X_MIN_PIN);
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#endif
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#if HAS_Y_MAX
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#if !AVAILABLE_EILINE(Y_MAX_PIN)
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#error "Y_MAX_PIN has no EXTINT line available."
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#endif
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_ATTACH(Y_MAX_PIN);
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#endif
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#if HAS_Y_MIN
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#if !AVAILABLE_EILINE(Y_MIN_PIN)
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#error "Y_MIN_PIN has no EXTINT line available."
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#endif
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_ATTACH(Y_MIN_PIN);
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#endif
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#if HAS_Z_MAX
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#if !AVAILABLE_EILINE(Z_MAX_PIN)
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#error "Z_MAX_PIN has no EXTINT line available."
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#endif
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_ATTACH(Z_MAX_PIN);
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#endif
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#if HAS_Z_MIN
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#if !AVAILABLE_EILINE(Z_MIN_PIN)
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#error "Z_MIN_PIN has no EXTINT line available."
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#endif
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_ATTACH(Z_MIN_PIN);
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#endif
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#if HAS_Z2_MAX
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#if !AVAILABLE_EILINE(Z2_MAX_PIN)
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#error "Z2_MAX_PIN has no EXTINT line available."
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#endif
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_ATTACH(Z2_MAX_PIN);
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#endif
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#if HAS_Z2_MIN
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#if !AVAILABLE_EILINE(Z2_MIN_PIN)
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#error "Z2_MIN_PIN has no EXTINT line available."
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#endif
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_ATTACH(Z2_MIN_PIN);
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#endif
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#if HAS_Z3_MAX
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#if !AVAILABLE_EILINE(Z3_MAX_PIN)
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#error "Z3_MAX_PIN has no EXTINT line available."
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#endif
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_ATTACH(Z3_MAX_PIN);
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#endif
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#if HAS_Z3_MIN
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#if !AVAILABLE_EILINE(Z3_MIN_PIN)
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#error "Z3_MIN_PIN has no EXTINT line available."
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#endif
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_ATTACH(Z3_MIN_PIN);
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#endif
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#if HAS_Z4_MAX
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#if !AVAILABLE_EILINE(Z4_MAX_PIN)
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#error "Z4_MAX_PIN has no EXTINT line available."
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#endif
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_ATTACH(Z4_MAX_PIN);
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#endif
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#if HAS_Z4_MIN
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#if !AVAILABLE_EILINE(Z4_MIN_PIN)
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#error "Z4_MIN_PIN has no EXTINT line available."
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#endif
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_ATTACH(Z4_MIN_PIN);
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#endif
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#if HAS_Z_MIN_PROBE_PIN
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#if !AVAILABLE_EILINE(Z_MIN_PROBE_PIN)
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#error "Z_MIN_PROBE_PIN has no EXTINT line available."
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#endif
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_ATTACH(Z_MIN_PROBE_PIN);
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#endif
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}
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