Initial commit

1 files changed, 208 insertions, 0 deletions

diff --git a/Marlin/src/HAL/SAMD51/endstop_interrupts.h b/Marlin/src/HAL/SAMD51/endstop_interrupts.h
new file mode 100644
index 0000000..daac773
--- /dev/null
+++ b/Marlin/src/HAL/SAMD51/endstop_interrupts.h
@@ -0,0 +1,208 @@
+/**
+ * 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 <https://www.gnu.org/licenses/>.
+ *
+ */
+#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))
+#if HAS_X_MAX
+  #define MATCH_X_MAX_EILINE(P) MATCH_EILINE(P, X_MAX_PIN)
+#else
+  #define MATCH_X_MAX_EILINE(P) false
+#endif
+#if HAS_X_MIN
+  #define MATCH_X_MIN_EILINE(P) MATCH_EILINE(P, X_MIN_PIN)
+#else
+  #define MATCH_X_MIN_EILINE(P) false
+#endif
+#if HAS_Y_MAX
+   #define MATCH_Y_MAX_EILINE(P) MATCH_EILINE(P, Y_MAX_PIN)
+#else
+   #define MATCH_Y_MAX_EILINE(P) false
+#endif
+#if HAS_Y_MIN
+  #define MATCH_Y_MIN_EILINE(P) MATCH_EILINE(P, Y_MIN_PIN)
+#else
+  #define MATCH_Y_MIN_EILINE(P) false
+#endif
+#if HAS_Z_MAX
+   #define MATCH_Z_MAX_EILINE(P) MATCH_EILINE(P, Z_MAX_PIN)
+#else
+  #define MATCH_Z_MAX_EILINE(P) false
+#endif
+#if HAS_Z_MIN
+  #define MATCH_Z_MIN_EILINE(P) MATCH_EILINE(P, Z_MIN_PIN)
+#else
+  #define MATCH_Z_MIN_EILINE(P) false
+#endif
+#if HAS_Z2_MAX
+  #define MATCH_Z2_MAX_EILINE(P) MATCH_EILINE(P, Z2_MAX_PIN)
+#else
+  #define MATCH_Z2_MAX_EILINE(P) false
+#endif
+#if HAS_Z2_MIN
+  #define MATCH_Z2_MIN_EILINE(P) MATCH_EILINE(P, Z2_MIN_PIN)
+#else
+  #define MATCH_Z2_MIN_EILINE(P) false
+#endif
+#if HAS_Z3_MAX
+  #define MATCH_Z3_MAX_EILINE(P) MATCH_EILINE(P, Z3_MAX_PIN)
+#else
+  #define MATCH_Z3_MAX_EILINE(P) false
+#endif
+#if HAS_Z3_MIN
+  #define MATCH_Z3_MIN_EILINE(P) MATCH_EILINE(P, Z3_MIN_PIN)
+#else
+  #define MATCH_Z3_MIN_EILINE(P) false
+#endif
+#if HAS_Z4_MAX
+  #define MATCH_Z4_MAX_EILINE(P) MATCH_EILINE(P, Z4_MAX_PIN)
+#else
+  #define MATCH_Z4_MAX_EILINE(P) false
+#endif
+#if HAS_Z4_MIN
+  #define MATCH_Z4_MIN_EILINE(P) MATCH_EILINE(P, Z4_MIN_PIN)
+#else
+  #define MATCH_Z4_MIN_EILINE(P) false
+#endif
+#if HAS_Z_MIN_PROBE_PIN
+  #define MATCH_Z_MIN_PROBE_EILINE(P)   MATCH_EILINE(P, Z_MIN_PROBE_PIN)
+#else
+  #define MATCH_Z_MIN_PROBE_EILINE(P) false
+#endif
+#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_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
+}