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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
- * Copyright (c) 2017 Victor Perez
- *
- * 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/>.
- *
- */
- #pragma once
-
- /**
- * Endstop interrupts for Libmaple STM32F1 based targets.
- *
- * On STM32F, all pins support external interrupt capability.
- * Any pin can be used for external interrupts, but there are some restrictions.
- * At most 16 different external interrupts can be used at one time.
- * Further, you can’t just pick any 16 pins to use. This is because every pin on the STM32
- * connects to what is called an EXTI line, and only one pin per EXTI line can be used for external interrupts at a time
- * Check the Reference Manual of the MCU to confirm which line is used by each pin
- */
-
- /**
- * Endstop Interrupts
- *
- * Without endstop interrupts the endstop pins must be polled continually in
- * the temperature-ISR via endstops.update(), most of the time finding no change.
- * With this feature endstops.update() is called only when we know that at
- * least one endstop has changed state, saving valuable CPU cycles.
- *
- * This feature only works when all used endstop pins can generate an 'external interrupt'.
- *
- * Test whether pins issue interrupts on your board by flashing 'pin_interrupt_test.ino'.
- * (Located in Marlin/buildroot/share/pin_interrupt_test/pin_interrupt_test.ino)
- */
-
- #include "../../module/endstops.h"
-
- // One ISR for all EXT-Interrupts
- void endstop_ISR() { endstops.update(); }
-
- void setup_endstop_interrupts() {
- #define _ATTACH(P) attachInterrupt(P, endstop_ISR, CHANGE)
- TERN_(HAS_X_MAX, _ATTACH(X_MAX_PIN));
- TERN_(HAS_X_MIN, _ATTACH(X_MIN_PIN));
- TERN_(HAS_Y_MAX, _ATTACH(Y_MAX_PIN));
- TERN_(HAS_Y_MIN, _ATTACH(Y_MIN_PIN));
- TERN_(HAS_Z_MAX, _ATTACH(Z_MAX_PIN));
- TERN_(HAS_Z_MIN, _ATTACH(Z_MIN_PIN));
- TERN_(HAS_X2_MAX, _ATTACH(X2_MAX_PIN));
- TERN_(HAS_X2_MIN, _ATTACH(X2_MIN_PIN));
- TERN_(HAS_Y2_MAX, _ATTACH(Y2_MAX_PIN));
- TERN_(HAS_Y2_MIN, _ATTACH(Y2_MIN_PIN));
- TERN_(HAS_Z2_MAX, _ATTACH(Z2_MAX_PIN));
- TERN_(HAS_Z2_MIN, _ATTACH(Z2_MIN_PIN));
- TERN_(HAS_Z3_MAX, _ATTACH(Z3_MAX_PIN));
- TERN_(HAS_Z3_MIN, _ATTACH(Z3_MIN_PIN));
- TERN_(HAS_Z4_MAX, _ATTACH(Z4_MAX_PIN));
- TERN_(HAS_Z4_MIN, _ATTACH(Z4_MIN_PIN));
- TERN_(HAS_Z_MIN_PROBE_PIN, _ATTACH(Z_MIN_PROBE_PIN));
- }
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