HAL for Re:ARM (LPC1768) architecture

Marlin/src/HAL/HAL_LPC1768/watchdog.cpp

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+/**
+ * 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 TARGET_LPC1768
+
+#include "../../../MarlinConfig.h"
+
+#if ENABLED(USE_WATCHDOG)
+
+#include "lpc17xx_wdt.h"
+#include "watchdog.h"
+
+void watchdog_init(void) {
+  WDT_Init(WDT_CLKSRC_IRC, WDT_MODE_RESET);
+  WDT_Start(WDT_TIMEOUT);
+}
+
+void HAL_clear_reset_source(void) {
+  WDT_ClrTimeOutFlag();
+}
+
+uint8_t HAL_get_reset_source (void) {
+  if(WDT_ReadTimeOutFlag() & 1) return RST_WATCHDOG;
+  return RST_POWER_ON;
+}
+
+void watchdog_reset() {
+  WDT_Feed();
+  TOGGLE(13); // heart beat indicator on Pin13
+}
+
+#endif // USE_WATCHDOG
+
+#endif