判断zigbee设备的网络状态

判断网络状态：
一、
1、extern devStates_t devState;（在ZDApp.h中声明）
typedef enum
{
  DEV_HOLD,               // Initialized - not started automatically
  DEV_INIT,               // Initialized - not connected to anything
  DEV_NWK_DISC,           // Discovering PAN's to join
  DEV_NWK_JOINING,        // Joining a PAN
  DEV_NWK_REJOIN,         // ReJoining a PAN, only for end devices
  DEV_END_DEVICE_UNAUTH,  // Joined but not yet authenticated by trust center
  DEV_END_DEVICE,         // Started as device after authentication
  DEV_ROUTER,             // Device joined, authenticated and is a router
  DEV_COORD_STARTING,     // Started as Zigbee Coordinator
  DEV_ZB_COORD,           // Started as Zigbee Coordinator
  DEV_NWK_ORPHAN          // Device has lost information about its parent..
} devStates_t;
2、HAL_LED_3灯的状态。
亮表示设备成为Coo（ZDO_NetworkFormationConfirmCB函数）或者Route（ZDO_StartRouterConfirmCB函数）成功、加网成功（ZDO_JoinConfirmCB函数），
闪烁表示失败。在ZDApp.c文件中设值。


二、
1、在主task中注册ZDO_STATE_CHANGE消息的事件函数。
2、在消息事件相应函数中可以获取新状态，用于判断设备状态。
uint16 ***_event_loop(()
{
  if ( events & SYS_EVENT_MSG )
  {
    MSGpkt = (afIncomingMSGPacket_t *)osal_msg_receive( ***_TaskID );
    while ( MSGpkt )
    {
      switch ( MSGpkt->hdr.event )
      {
case ZDO_STATE_CHANGE:
          ***_NwkState = (devStates_t)(MSGpkt->hdr.status);
          break;


        default:
          break;
      }


      // Release the memory
      osal_msg_deallocate( (uint8 *)MSGpkt );


      // Next
      MSGpkt = (afIncomingMSGPacket_t *)osal_msg_receive( ***_TaskID );
    }


    // Return unprocessed events
    return (events ^ SYS_EVENT_MSG);
  }

}

注意：只有EndDevice设备才能判断是否是孤儿节点，router设备是不能的