Implement HAL and apply macros across code-base

Implement AVR Platform

Marlin/src/HAL/HAL_AVR/watchdog_AVR.cpp

@@ -0,0 +1,59 @@
+/**
+ * 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
+ *
+ * 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/>.
+ *
+ */
+
+#ifdef ARDUINO_ARCH_AVR
+
+#include "../../../Marlin.h"
+
+#if ENABLED(USE_WATCHDOG)
+
+#include "watchdog_AVR.h"
+
+// Initialize watchdog with a 4 sec interrupt time
+void watchdog_init() {
+  #if ENABLED(WATCHDOG_RESET_MANUAL)
+    // We enable the watchdog timer, but only for the interrupt.
+    // Take care, as this requires the correct order of operation, with interrupts disabled. See the datasheet of any AVR chip for details.
+    wdt_reset();
+    _WD_CONTROL_REG = _BV(_WD_CHANGE_BIT) | _BV(WDE);
+    _WD_CONTROL_REG = _BV(WDIE) | WDTO_4S;
+  #else
+    wdt_enable(WDTO_4S);
+  #endif
+}
+
+//===========================================================================
+//=================================== ISR ===================================
+//===========================================================================
+
+// Watchdog timer interrupt, called if main program blocks >4sec and manual reset is enabled.
+#if ENABLED(WATCHDOG_RESET_MANUAL)
+  ISR(WDT_vect) {
+    SERIAL_ERROR_START();
+    SERIAL_ERRORLNPGM("Something is wrong, please turn off the printer.");
+    kill(PSTR("ERR:Please Reset")); //kill blocks //16 characters so it fits on a 16x2 display
+    while (1); //wait for user or serial reset
+  }
+#endif // WATCHDOG_RESET_MANUAL
+
+#endif // USE_WATCHDOG
+#endif // ARDUINO_ARCH_AVR