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

Marlin/src/HAL/HAL_STM32F4/watchdog_STM32F4.cpp

@@ -0,0 +1,57 @@
+/**
+ * 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 STM32F4
+
+#include "../../inc/MarlinConfig.h"
+
+#if ENABLED(USE_WATCHDOG)
+
+  #include "watchdog_STM32F4.h"
+
+  IWDG_HandleTypeDef hiwdg;
+
+  void watchdog_init() {
+    hiwdg.Instance = IWDG;
+    hiwdg.Init.Prescaler = IWDG_PRESCALER_32; //32kHz LSI clock and 32x prescalar = 1024Hz IWDG clock
+    hiwdg.Init.Reload = 4095;           //4095 counts = 4 seconds at 1024Hz
+    if (HAL_IWDG_Init(&hiwdg) != HAL_OK) {
+      //Error_Handler();
+    }
+  }
+
+  void watchdog_reset() {
+    /* Refresh IWDG: reload counter */
+    if (HAL_IWDG_Refresh(&hiwdg) != HAL_OK) {
+      /* Refresh Error */
+      //Error_Handler();
+    }
+    else {
+    #if PIN_EXISTS(LED)
+      TOGGLE(LED_PIN);  // heart beat indicator
+    #endif
+    }
+  }
+
+#endif // USE_WATCHDOG
+
+#endif // STM32F4