Watchdog: use mbed API to enable and trigger watchdog

Author: pennam

src/utility/watchdog/Watchdog.cpp

@@ -42,7 +42,7 @@
 /******************************************************************************
  * GLOBAL VARIABLES
  ******************************************************************************/
-#if defined(ARDUINO_ARCH_SAMD) || defined(ARDUINO_ARCH_MBED)
+#if defined(ARDUINO_ARCH_SAMD)
 static bool is_watchdog_enabled = false;
 #endif
 
@@ -96,18 +96,15 @@ static void mbed_watchdog_enable()
 # error "You need to define the maximum possible timeout for this architecture."
 #endif
 
-  if (hal_watchdog_init(&cfg) == WATCHDOG_STATUS_OK) {
-    is_watchdog_enabled = true;
-  }
-  else {
+  if (!mbed::Watchdog::get_instance().start(cfg.timeout_ms)) {
     DEBUG_WARNING("%s: watchdog could not be enabled", __FUNCTION__);
   }
 }
 
 static void mbed_watchdog_reset()
 {
-  if (is_watchdog_enabled) {
-    hal_watchdog_kick();
+  if (mbed::Watchdog::get_instance().is_running()) {
+    mbed::Watchdog::get_instance().kick();
   }
 }