[2.0.x] HAL for STM32F4 (#10434)

Marlin/src/HAL/HAL_STM32F4/endstop_interrupts.h

@@ -0,0 +1,77 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (C) 2016 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 <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef _ENDSTOP_INTERRUPTS_H_
+#define _ENDSTOP_INTERRUPTS_H_
+
+volatile uint8_t e_hit = 0; // Different from 0 when the endstops should be tested in detail.
+                            // Must be reset to 0 by the test function when finished.
+
+// This is what is really done inside the interrupts.
+FORCE_INLINE void endstop_ISR_worker( void ) {
+  e_hit = 2; // Because the detection of a e-stop hit has a 1 step debouncer it has to be called at least twice.
+}
+
+// One ISR for all EXT-Interrupts
+void endstop_ISR(void) { endstop_ISR_worker(); }
+
+void setup_endstop_interrupts(void) {
+  #if HAS_X_MAX
+    pinMode(X_MAX_PIN, INPUT);
+    attachInterrupt(X_MAX_PIN, endstop_ISR, CHANGE); // assign it
+  #endif
+  #if HAS_X_MIN
+    pinMode(X_MIN_PIN, INPUT);
+    attachInterrupt(X_MIN_PIN, endstop_ISR, CHANGE);
+  #endif
+  #if HAS_Y_MAX
+    pinMode(Y_MAX_PIN, INPUT);
+    attachInterrupt(Y_MAX_PIN, endstop_ISR, CHANGE);
+  #endif
+  #if HAS_Y_MIN
+    pinMode(Y_MIN_PIN, INPUT);
+    attachInterrupt(Y_MIN_PIN, endstop_ISR, CHANGE);
+  #endif
+  #if HAS_Z_MAX
+    pinMode(Z_MAX_PIN, INPUT);
+    attachInterrupt(Z_MAX_PIN, endstop_ISR, CHANGE);
+  #endif
+  #if HAS_Z_MIN
+    pinMode(Z_MIN_PIN, INPUT);
+    attachInterrupt(Z_MIN_PIN, endstop_ISR, CHANGE);
+  #endif
+  #if HAS_Z2_MAX
+    pinMode(Z2_MAX_PIN, INPUT);
+    attachInterrupt(Z2_MAX_PIN, endstop_ISR, CHANGE);
+  #endif
+  #if HAS_Z2_MIN
+    pinMode(Z2_MIN_PIN, INPUT);
+    attachInterrupt(Z2_MIN_PIN, endstop_ISR, CHANGE);
+  #endif
+  #if HAS_Z_MIN_PROBE_PIN
+    pinMode(Z_MIN_PROBE_PIN, INPUT);
+    attachInterrupt(Z_MIN_PROBE_PIN, endstop_ISR, CHANGE);
+  #endif
+}
+
+#endif //_ENDSTOP_INTERRUPTS_H_