1 files changed, 25 insertions, 0 deletions
diff --git a/src/stm32/watchdog.c b/src/stm32/watchdog.c
new file mode 100644
index 00000000..696d64d6
--- /dev/null
+++ b/src/stm32/watchdog.c
@@ -0,0 +1,25 @@
+// Watchdog handler on STM32
+//
+// Copyright (C) 2019  Kevin O'Connor <kevin@koconnor.net>
+//
+// This file may be distributed under the terms of the GNU GPLv3 license.
+
+#include "internal.h" // IWDG
+#include "sched.h" // DECL_TASK
+
+void
+watchdog_reset(void)
+{
+    IWDG->KR = 0xAAAA;
+}
+DECL_TASK(watchdog_reset);
+
+void
+watchdog_init(void)
+{
+    IWDG->KR = 0x5555;
+    IWDG->PR = 0;
+    IWDG->RLR = 0x0FFF; // 410-512ms timeout (depending on stm32 chip)
+    IWDG->KR = 0xCCCC;
+}
+DECL_INIT(watchdog_init);