Watchdog: Enable feed function for Ethernet

  The implementation is done as for WiFi so we can reuse the same define ARDUINO_PORTENTA_H7_WIFI_HAS_FEED_WATCHDOG_FUNC

  Move watchdog network feed configuration into Watchdog module

Author: pennam

src/ArduinoIoTCloudTCP.cpp

@@ -308,7 +308,8 @@ int ArduinoIoTCloudTCP::begin(bool const enable_watchdog, String brokerAddress,
   if (enable_watchdog) {
     watchdog_enable();
 #if defined (WIFI_HAS_FEED_WATCHDOG_FUNC) || defined (ARDUINO_PORTENTA_H7_WIFI_HAS_FEED_WATCHDOG_FUNC)
-      WiFi.setFeedWatchdogFunc(watchdog_reset);
+    bool const use_ethernet = _connection->getInterface() == NetworkAdapter::ETHERNET ? true : false;
+    watchdog_enable_network_feed(use_ethernet);
 #endif
   }
 #endif

src/utility/watchdog/Watchdog.cpp

@@ -29,11 +29,14 @@
 
 #ifdef ARDUINO_ARCH_SAMD
 #  include <Adafruit_SleepyDog.h>
+#  include <WiFi.h>
 #  define SAMD_WATCHDOG_MAX_TIME_ms (16 * 1000)
 #endif /* ARDUINO_ARCH_SAMD */
 
 #ifdef ARDUINO_ARCH_MBED
 #  include <watchdog_api.h>
+#  include <WiFi.h>
+#  include <Ethernet.h>
 #  define PORTENTA_H7_WATCHDOG_MAX_TIMEOUT_ms (32760)
 #  define NANO_RP2040_WATCHDOG_MAX_TIMEOUT_ms (8389)
 #endif /* ARDUINO_ARCH_MBED */
@@ -63,6 +66,11 @@ static void samd_watchdog_reset()
   }
 }
 
+static void samd_watchdog_enable_network_feed()
+{
+  WiFi.setFeedWatchdogFunc(watchdog_reset);
+}
+
 /* This function is called within the WiFiNINA library when invoking
  * the method 'connectBearSSL' in order to prevent a premature bite
  * of the watchdog (max timeout on SAMD is 16 s). wifi_nina_feed...
@@ -114,6 +122,17 @@ static void mbed_watchdog_reset()
   }
 }
 
+static void mbed_watchdog_enable_network_feed(bool use_ethernet)
+{
+  if(use_ethernet) {
+#if defined(ARDUINO_PORTENTA_H7_M7)
+    Ethernet.setFeedWatchdogFunc(watchdog_reset);
+#endif
+  } else {
+    WiFi.setFeedWatchdogFunc(watchdog_reset);
+  }
+}
+
 void mbed_watchdog_trigger_reset()
 {
   watchdog_config_t cfg;
@@ -154,4 +173,13 @@ void watchdog_reset()
   mbed_watchdog_reset();
 #endif
 }
+
+void watchdog_enable_network_feed(bool use_ethernet)
+{
+#ifdef ARDUINO_ARCH_SAMD
+  samd_watchdog_enable_network_feed();
+#else
+  mbed_watchdog_enable_network_feed(use_ethernet);
+#endif
+}
 #endif /* (ARDUINO_ARCH_SAMD) || (ARDUINO_ARCH_MBED) */

src/utility/watchdog/Watchdog.h

@@ -25,6 +25,7 @@
 #if defined (ARDUINO_ARCH_SAMD) || defined (ARDUINO_ARCH_MBED)
 void watchdog_enable();
 void watchdog_reset();
+void watchdog_enable_network_feed(bool use_ethernet);
 #endif /* (ARDUINO_ARCH_SAMD) || (ARDUINO_ARCH_MBED) */
 
 #ifdef ARDUINO_ARCH_MBED