reworked watchdog

bsp_q7s/core/WatchdogHandler.h

@@ -0,0 +1,23 @@
+#ifndef BSP_Q7S_CORE_WATCHDOGHANDLER_H_
+#define BSP_Q7S_CORE_WATCHDOGHANDLER_H_
+
+#include "fsfw/returnvalues/returnvalue.h"
+
+class WatchdogHandler {
+ public:
+  WatchdogHandler();
+
+  ReturnValue_t initialize(bool enableWatchFunction);
+  void periodicOperation();
+
+ private:
+  // Designated value for rechecking FIFO open
+  static constexpr int RETRY_FIFO_OPEN = -2;
+
+  int watchdogFifoFd = 0;
+  bool enableWatchFunction = false;
+
+  ReturnValue_t performStartHandling();
+};
+
+#endif /* BSP_Q7S_CORE_WATCHDOGHANDLER_H_ */