Re-enable the watchdog for Zigbee

src/zigbee_ncp/config/zigbee_watchdog_periodic_refresh_config.h

@@ -0,0 +1,34 @@
+/***************************************************************************//**
+ * @brief Sample watchdog refresh event component configuration header.
+ ********************************************************************************
+ * # License
+ * <b>Copyright 2022 Silicon Laboratories Inc. www.silabs.com</b>
+ *******************************************************************************
+ *
+ * The licensor of this software is Silicon Laboratories Inc. Your use of this
+ * software is governed by the terms of Silicon Labs Master Software License
+ * Agreement (MSLA) available at
+ * www.silabs.com/about-us/legal/master-software-license-agreement. This
+ * software is distributed to you in Source Code format and is governed by the
+ * sections of the MSLA applicable to Source Code.
+ *
+ ******************************************************************************/
+
+// <<< Use Configuration Wizard in Context Menu >>>
+
+// <h>Zigbee Watchdog reset component configuration
+
+// <e SL_ZIGBEE_WATCHDOG_PERIODIC_REFRESH_ENABLE> Enable periodic watchdog refresh
+// <i> Default: TRUE
+// <i> This allows for enabling or disabling periodic watchdog refresh
+#define SL_ZIGBEE_WATCHDOG_PERIODIC_REFRESH_ENABLE   1
+
+// <o SL_ZIGBEE_WATCHDOG_REFRESH_DURATION_MS> Watchdog refresh duration <50-5000>
+// <i> Default: 1000
+// <i> Defines the periodic interval at which the watchdog timer is reset in the application
+#define SL_ZIGBEE_WATCHDOG_REFRESH_DURATION_MS   1000
+
+// </e>
+// </h>
+
+// <<< end of configuration section >>>

src/zigbee_ncp/sl_zigbee_watchdog_periodic_refresh.c

@@ -0,0 +1,59 @@
+/***************************************************************************//**
+ * @file
+ * @brief Sample watchdog refresh event implementation and related configuration
+ *******************************************************************************
+ * # License
+ * <b>Copyright 2022 Silicon Laboratories Inc. www.silabs.com</b>
+ *******************************************************************************
+ *
+ * The licensor of this software is Silicon Laboratories Inc. Your use of this
+ * software is governed by the terms of Silicon Labs Master Software License
+ * Agreement (MSLA) available at
+ * www.silabs.com/about-us/legal/master-software-license-agreement. This
+ * software is distributed to you in Source Code format and is governed by the
+ * sections of the MSLA applicable to Source Code.
+ *
+ ******************************************************************************/
+#include PLATFORM_HEADER
+#include "hal.h"
+#include "ember.h"
+#include "zigbee_app_framework_event.h"
+#include "zigbee_app_framework_common.h"
+#include "zigbee_watchdog_periodic_refresh_config.h"
+
+#if (SL_ZIGBEE_WATCHDOG_PERIODIC_REFRESH_ENABLE == 1)
+
+static sl_zigbee_event_t watchdog_refresh_event;
+static void watchdog_refresh_event_handler(sl_zigbee_event_t *event);
+
+// Initialization of watchdog refresh event
+void sli_zigbee_watchdog_refresh_handler_init(uint8_t init_level)
+{
+  switch (init_level) {
+    case SL_ZIGBEE_INIT_LEVEL_EVENT:
+    {
+      sl_zigbee_event_init(&watchdog_refresh_event, watchdog_refresh_event_handler);
+      sl_zigbee_event_set_active(&watchdog_refresh_event);
+      break;
+    }
+    default:
+      break;
+  }
+}
+
+// In RTOS-based applications, the Zigbee task refreshes the watchdog.
+// However, when the node is not on a network the Zigbee task does not run.
+// Therefore, there needs to be a way to ensure that the watchdog does not fire
+// and reset the node unnecessarily. Below we provide an example of an application
+// event that periodically resets the watchdog.
+// Note, such a periodic event gets the node out of EM1/EM2 low power modes,
+// which may result in unnecessary energy consumption.
+// The application should ultimately own the refreshing of the watchdog and tailor
+// it based on the specific use case.
+// In the bare-metal case, this is done in the zigbee stack and app framework ticks
+static void watchdog_refresh_event_handler(sl_zigbee_event_t *event)
+{
+  halResetWatchdog();
+  sl_zigbee_event_set_delay_ms(&watchdog_refresh_event, SL_ZIGBEE_WATCHDOG_REFRESH_DURATION_MS);
+}
+#endif //(SL_ZIGBEE_WATCHDOG_PERIODIC_REFRESH_ENABLE == 1)

src/zigbee_ncp/zigbee_ncp.slcp

@@ -60,19 +60,28 @@ configuration:
     value: 1
   - name: EMBER_AF_PLUGIN_PACKET_HANDOFF_ALLOW_ALL_PACKETS
     value: 1
+  - name: SL_LEGACY_HAL_DISABLE_WATCHDOG
+    value: 0
+  - name: SL_ZIGBEE_WATCHDOG_PERIODIC_REFRESH_ENABLE
+    value: 1
 
 source:
   - path: main.c
   - path: app.c
+  - path: sl_zigbee_watchdog_periodic_refresh.c
 
 config_file:
   - path: config/xncp_config.h
     file_id: xncp_config
+  - path: config/zigbee_watchdog_periodic_refresh_config.h
 
 template_contribution:
 - name: zigbee_stack_callback
   priority: -9999
   value: {callback_type: override_append_source_route, function_name: nc_zigbee_override_append_source_route}
+- name: zigbee_af_callback
+  value: {callback_type: event_init, function_name: sli_zigbee_watchdog_refresh_handler_init}
+
 
 filter:
   - name: Wireless Technology