1         // Received whenever the device changes state in the network 2         case ZDO_STATE_CHANGE://网络状态发生改变 3           SampleApp_NwkState = (devStates_t)(MSGpkt->hdr.status);//把含有某部分网络发生改变的数值赋值给变量 4           if ( (SampleApp_NwkState == DEV_ZB_COORD)     //这里就是困扰了我很久的问题所在，不明白为什么要用“或” 5               || (SampleApp_NwkState == DEV_ROUTER)      //用“或”的话不是无法区分协调器、路由器、终端各自的 6               || (SampleApp_NwkState == DEV_END_DEVICE) )//任务了吗？还用了else，就更难理解了（就我而言）。 7           { 8             // Start sending the periodic message in a regular interval. 9             osal_start_timerEx( SampleApp_TaskID,10                               SAMPLEAPP_SEND_PERIODIC_MSG_EVT,11                               SAMPLEAPP_SEND_PERIODIC_MSG_TIMEOUT );12           }13           else14           {15             // Device is no longer in the network16           }17           break;

 1         // Received whenever the device changes state in the network 2         case ZDO_STATE_CHANGE: 3           SampleApp_NwkState = (devStates_t)(MSGpkt->hdr.status); 4            5           //如果发生改变的是终端，则执行终端任务 6           if (SampleApp_NwkState == DEV_END_DEVICE) 7           { 8             // Start sending the periodic message in a regular interval.//执行终端任务 9             osal_start_timerEx( SampleApp_TaskID,10                               SAMPLEAPP_SEND_PERIODIC_MSG_EVT,   //定时一段时间后发出消息11                               SAMPLEAPP_SEND_PERIODIC_MSG_TIMEOUT );12           }13           //如果发生改变的是路由器，则执行路由器任务14           else if(SampleApp_NwkState == DEV_ROUTER)15           {16             //执行路由器任务17           }18           //如果发生改变的是协调器，则执行协调器任务19           else if(SampleApp_NwkState == DEV_ZB_COORD)20           {21             //执行协调器任务22           }23           else24           {25             //error26           }