/** * Marlin 3D Printer Firmware * * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin] * SAMD51 HAL developed by Giuliano Zaro (AKA GMagician) * * 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 . * */ #pragma once /** * Endstop interrupts for ATMEL SAMD51 based targets. * * On SAMD51, 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 SAMD51 * connects to what is called an EXTINT line, and only one pin per EXTINT line can be used for external * interrupts at a time */ /** * 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" #define MATCH_EILINE(P1,P2) (P1 != P2 && PIN_TO_EILINE(P1) == PIN_TO_EILINE(P2)) #define MATCH_X_MAX_EILINE(P) TERN0(HAS_X_MAX, DEFER4(MATCH_EILINE)(P, X_MAX_PIN)) #define MATCH_X_MIN_EILINE(P) TERN0(HAS_X_MIN, DEFER4(MATCH_EILINE)(P, X_MIN_PIN)) #define MATCH_Y_MAX_EILINE(P) TERN0(HAS_Y_MAX, DEFER4(MATCH_EILINE)(P, Y_MAX_PIN)) #define MATCH_Y_MIN_EILINE(P) TERN0(HAS_Y_MIN, DEFER4(MATCH_EILINE)(P, Y_MIN_PIN)) #define MATCH_Z_MAX_EILINE(P) TERN0(HAS_Z_MAX, DEFER4(MATCH_EILINE)(P, Z_MAX_PIN)) #define MATCH_Z_MIN_EILINE(P) TERN0(HAS_Z_MIN, DEFER4(MATCH_EILINE)(P, Z_MIN_PIN)) #define MATCH_I_MAX_EILINE(P) TERN0(HAS_I_MAX, DEFER4(MATCH_EILINE)(P, I_MAX_PIN)) #define MATCH_I_MIN_EILINE(P) TERN0(HAS_I_MIN, DEFER4(MATCH_EILINE)(P, I_MIN_PIN)) #define MATCH_J_MAX_EILINE(P) TERN0(HAS_J_MAX, DEFER4(MATCH_EILINE)(P, J_MAX_PIN)) #define MATCH_J_MIN_EILINE(P) TERN0(HAS_J_MIN, DEFER4(MATCH_EILINE)(P, J_MIN_PIN)) #define MATCH_K_MAX_EILINE(P) TERN0(HAS_K_MAX, DEFER4(MATCH_EILINE)(P, K_MAX_PIN)) #define MATCH_K_MIN_EILINE(P) TERN0(HAS_K_MIN, DEFER4(MATCH_EILINE)(P, K_MIN_PIN)) #define MATCH_Z2_MAX_EILINE(P) TERN0(HAS_Z2_MAX, DEFER4(MATCH_EILINE)(P, Z2_MAX_PIN)) #define MATCH_Z2_MIN_EILINE(P) TERN0(HAS_Z2_MIN, DEFER4(MATCH_EILINE)(P, Z2_MIN_PIN)) #define MATCH_Z3_MAX_EILINE(P) TERN0(HAS_Z3_MAX, DEFER4(MATCH_EILINE)(P, Z3_MAX_PIN)) #define MATCH_Z3_MIN_EILINE(P) TERN0(HAS_Z3_MIN, DEFER4(MATCH_EILINE)(P, Z3_MIN_PIN)) #define MATCH_Z4_MAX_EILINE(P) TERN0(HAS_Z4_MAX, DEFER4(MATCH_EILINE)(P, Z4_MAX_PIN)) #define MATCH_Z4_MIN_EILINE(P) TERN0(HAS_Z4_MIN, DEFER4(MATCH_EILINE)(P, Z4_MIN_PIN)) #define MATCH_Z_MIN_PROBE_EILINE(P) TERN0(HAS_Z_MIN_PROBE_PIN, DEFER4(MATCH_EILINE)(P, Z_MIN_PROBE_PIN)) #define AVAILABLE_EILINE(P) ( PIN_TO_EILINE(P) != -1 \ && !MATCH_X_MAX_EILINE(P) && !MATCH_X_MIN_EILINE(P) \ && !MATCH_Y_MAX_EILINE(P) && !MATCH_Y_MIN_EILINE(P) \ && !MATCH_Z_MAX_EILINE(P) && !MATCH_Z_MIN_EILINE(P) \ && !MATCH_I_MAX_EILINE(P) && !MATCH_I_MIN_EILINE(P) \ && !MATCH_J_MAX_EILINE(P) && !MATCH_J_MIN_EILINE(P) \ && !MATCH_K_MAX_EILINE(P) && !MATCH_K_MIN_EILINE(P) \ && !MATCH_Z2_MAX_EILINE(P) && !MATCH_Z2_MIN_EILINE(P) \ && !MATCH_Z3_MAX_EILINE(P) && !MATCH_Z3_MIN_EILINE(P) \ && !MATCH_Z4_MAX_EILINE(P) && !MATCH_Z4_MIN_EILINE(P) \ && !MATCH_Z_MIN_PROBE_EILINE(P) ) // One ISR for all EXT-Interrupts void endstop_ISR() { endstops.update(); } void setup_endstop_interrupts() { #define _ATTACH(P) attachInterrupt(P, endstop_ISR, CHANGE) #if HAS_X_MAX #if !AVAILABLE_EILINE(X_MAX_PIN) #error "X_MAX_PIN has no EXTINT line available." #endif _ATTACH(X_MAX_PIN); #endif #if HAS_X_MIN #if !AVAILABLE_EILINE(X_MIN_PIN) #error "X_MIN_PIN has no EXTINT line available." #endif _ATTACH(X_MIN_PIN); #endif #if HAS_Y_MAX #if !AVAILABLE_EILINE(Y_MAX_PIN) #error "Y_MAX_PIN has no EXTINT line available." #endif _ATTACH(Y_MAX_PIN); #endif #if HAS_Y_MIN #if !AVAILABLE_EILINE(Y_MIN_PIN) #error "Y_MIN_PIN has no EXTINT line available." #endif _ATTACH(Y_MIN_PIN); #endif #if HAS_Z_MAX #if !AVAILABLE_EILINE(Z_MAX_PIN) #error "Z_MAX_PIN has no EXTINT line available." #endif _ATTACH(Z_MAX_PIN); #endif #if HAS_Z_MIN #if !AVAILABLE_EILINE(Z_MIN_PIN) #error "Z_MIN_PIN has no EXTINT line available." #endif _ATTACH(Z_MIN_PIN); #endif #if HAS_Z2_MAX #if !AVAILABLE_EILINE(Z2_MAX_PIN) #error "Z2_MAX_PIN has no EXTINT line available." #endif _ATTACH(Z2_MAX_PIN); #endif #if HAS_Z2_MIN #if !AVAILABLE_EILINE(Z2_MIN_PIN) #error "Z2_MIN_PIN has no EXTINT line available." #endif _ATTACH(Z2_MIN_PIN); #endif #if HAS_Z3_MAX #if !AVAILABLE_EILINE(Z3_MAX_PIN) #error "Z3_MAX_PIN has no EXTINT line available." #endif _ATTACH(Z3_MAX_PIN); #endif #if HAS_Z3_MIN #if !AVAILABLE_EILINE(Z3_MIN_PIN) #error "Z3_MIN_PIN has no EXTINT line available." #endif _ATTACH(Z3_MIN_PIN); #endif #if HAS_Z4_MAX #if !AVAILABLE_EILINE(Z4_MAX_PIN) #error "Z4_MAX_PIN has no EXTINT line available." #endif _ATTACH(Z4_MAX_PIN); #endif #if HAS_Z4_MIN #if !AVAILABLE_EILINE(Z4_MIN_PIN) #error "Z4_MIN_PIN has no EXTINT line available." #endif _ATTACH(Z4_MIN_PIN); #endif #if HAS_Z_MIN_PROBE_PIN #if !AVAILABLE_EILINE(Z_MIN_PROBE_PIN) #error "Z_MIN_PROBE_PIN has no EXTINT line available." #endif _ATTACH(Z_MIN_PROBE_PIN); #endif #if HAS_I_MAX #if !AVAILABLE_EILINE(I_MAX_PIN) #error "I_MAX_PIN has no EXTINT line available." #endif attachInterrupt(I_MAX_PIN, endstop_ISR, CHANGE); #endif #if HAS_I_MIN #if !AVAILABLE_EILINE(I_MIN_PIN) #error "I_MIN_PIN has no EXTINT line available." #endif attachInterrupt(I_MIN_PIN, endstop_ISR, CHANGE); #endif #if HAS_J_MAX #if !AVAILABLE_EILINE(J_MAX_PIN) #error "J_MAX_PIN has no EXTINT line available." #endif attachInterrupt(J_MAX_PIN, endstop_ISR, CHANGE); #endif #if HAS_J_MIN #if !AVAILABLE_EILINE(J_MIN_PIN) #error "J_MIN_PIN has no EXTINT line available." #endif attachInterrupt(J_MIN_PIN, endstop_ISR, CHANGE); #endif #if HAS_K_MAX #if !AVAILABLE_EILINE(K_MAX_PIN) #error "K_MAX_PIN has no EXTINT line available." #endif attachInterrupt(K_MAX_PIN, endstop_ISR, CHANGE); #endif #if HAS_K_MIN #if !AVAILABLE_EILINE(K_MIN_PIN) #error "K_MIN_PIN has no EXTINT line available." #endif attachInterrupt(K_MIN_PIN, endstop_ISR, CHANGE); #endif }