Shorter paths to HAL, ExtUI (#17156)

Marlin/src/HAL/STM32/watchdog.cpp

@@ -0,0 +1,44 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 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/>.
+ *
+ */
+
+#if defined(ARDUINO_ARCH_STM32) && !defined(STM32GENERIC)
+
+#include "../../inc/MarlinConfigPre.h"
+
+#if ENABLED(USE_WATCHDOG)
+
+  #include "../../inc/MarlinConfig.h"
+
+  #include "watchdog.h"
+  #include <IWatchdog.h>
+
+  void watchdog_init() { IWatchdog.begin(4000000); } // 4 sec timeout
+
+  void HAL_watchdog_refresh() {
+    IWatchdog.reload();
+    #if DISABLED(PINS_DEBUGGING) && PIN_EXISTS(LED)
+      TOGGLE(LED_PIN);  // heartbeat indicator
+    #endif
+  }
+
+#endif // USE_WATCHDOG
+#endif // ARDUINO_ARCH_STM32 && !STM32GENERIC