HW Watchdog and SW watchdog interface

- Added Hw watchdog periodic kick calls software watchdog is_alive check

platform/mbed_watchdog_mgr.cpp

@@ -24,6 +24,7 @@ static bool is_watchdog_started = false; //boolean to control watchdog start and
 
 MBED_STATIC_ASSERT((HW_WATCHDOG_TIMEOUT >= 0),"Timeout must be greater than zero");
 
+Watchdog watchdog(0,"Platform Watchdog");
 
 /** Create singleton instance of LowPowerTicker for watchdog periodic call back of kick.
  */
@@ -44,6 +45,7 @@ static void mbed_wdog_manager_kick()
 {
     core_util_critical_section_enter();
     hal_watchdog_kick();
+    watchdog.is_alive();
     core_util_critical_section_exit();
 }
 

platform/mbed_watchdog_mgr.h

@@ -25,6 +25,7 @@
 #include "mbed.h"
 #include "platform/mbed_critical.h"
 #include "LowPowerTicker.h"
+#include "Watchdog.h"
 
 #ifdef __cplusplus
 extern "C" {