1 files changed, 66 insertions, 0 deletions
diff --git a/Marlin/src/HAL/STM32F1/watchdog.cpp b/Marlin/src/HAL/STM32F1/watchdog.cpp
new file mode 100644
index 0000000..b812a4f
--- /dev/null
+++ b/Marlin/src/HAL/STM32F1/watchdog.cpp
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+/**
+ * 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 <https://www.gnu.org/licenses/>.
+ *
+ */
+
+/**
+ * HAL for stm32duino.com based on Libmaple and compatible (STM32F1)
+ */
+
+#ifdef __STM32F1__
+
+#include "../../inc/MarlinConfig.h"
+
+#if ENABLED(USE_WATCHDOG)
+
+#include <libmaple/iwdg.h>
+#include "watchdog.h"
+
+/**
+ *  The watchdog clock is 40Khz. So for a 4s or 8s interval use a /256 preescaler and 625 or 1250 reload value (counts down to 0).
+ */
+#define STM32F1_WD_RELOAD TERN(WATCHDOG_DURATION_8S, 1250, 625) // 4 or 8 second timeout
+
+void HAL_watchdog_refresh() {
+  #if DISABLED(PINS_DEBUGGING) && PIN_EXISTS(LED)
+    TOGGLE(LED_PIN);  // heartbeat indicator
+  #endif
+  iwdg_feed();
+}
+
+void watchdogSetup() {
+  // do whatever. don't remove this function.
+}
+
+/**
+ * @brief  Initialized the independent hardware watchdog.
+ *
+ * @return No return
+ *
+ * @details The watchdog clock is 40Khz. So for a 4s or 8s interval use a /256 preescaler and 625 or 1250 reload value (counts down to 0).
+ */
+void watchdog_init() {
+  #if DISABLED(DISABLE_WATCHDOG_INIT)
+    iwdg_init(IWDG_PRE_256, STM32F1_WD_RELOAD);
+  #endif
+}
+
+#endif // USE_WATCHDOG
+#endif // __STM32F1__