cc2530 znp uart program flow

const cId_t zb_InCmdList[NUM_IN_CMD_COLLECTOR] =
{
  TEMPERATURE_SENSOR_CMD_ID  				//temperature sensor IN cluster(defined in respective sensor file)
};
const cId_t zb_InCmdList[NUM_IN_CMD_COLLECTOR] =
{
  PIR_SENSOR_CMD_ID					//pir sensor IN cluster(defined in respective sensor file)
};
const cId_t zb_InCmdList[NUM_IN_CMD_COLLECTOR] =
{
  ENERGY_METER_CMD_ID  					//energy meter IN cluster(defined in respective sensor file)
};

#define PIR_SENSOR_ENDPOINT_ID            0x02
#define ENERGY_METER_ENDPOINT_ID          0X02 
#define TEMP_ENDPOINT_ID                  0x02

  
uint8 dev_cnt;
            
	case Device_annce:
        {          
          ZDO_DeviceAnnce_t devAnnce;
          ZDO_ParseDeviceAnnce( inMsg, &devAnnce );
          destAddr.addrMode = Addr16Bit;
          destAddr.addr.shortAddr = devAnnce.nwkAddr;
          for(dev_cnt =0;dev_cnt<10;dev_cnt++)  //check whether any device with short address same as devAnnce.nwkAddr is already present or not
          {
            if(destAddr.addr.shortAddr == device_list[dev_cnt].nwkAddr)
            {
              break;    //break loop if device is already registered
            }
          }
          if( dev_cnt == 10)    //dev_cnt == 10 means device is not registered in the device list,dev_cnt<10 means device already present in list
          {
            for(uint8 i = 0;i < 10;i++)
            {
              if(device_list[i].endpoint == NULL)  //check which is the last device registered, endpoint with NULL means no device registered at that device list
              {
                device_list[i].nwkAddr = devAnnce.nwkAddr;             //register short address of the announced device into device list at location where device is not registered
                ZDP_ActiveEPReq( &destAddr, devAnnce.nwkAddr, 0);   //send active end point request for the new device announced
                break;  //exit further registering of devices
              }
            }
          }            
        }
        break;
      case Active_EP_rsp:
        { 
          ZDO_ActiveEndpointRsp_t *pActiveEPs = NULL;
          pActiveEPs = ZDO_ParseEPListRsp( inMsg );     //get end point response         
          if ( pActiveEPs->status == ZSuccess )
          {
            for (uint8 j=0; j < pActiveEPs->cnt; j++ )  //
            {
              if(pActiveEPs->nwkAddr == device_list[j].nwkAddr)    //match the short address of the end point for which end point response has arrived
              {
                device_list[j].endpoint = pActiveEPs->epList[j];   //store the end point of the responded end point in the device list
                addr.addr.shortAddr = pActiveEPs->nwkAddr;
                addr.addrMode = Addr16Bit; 
                ZDP_SimpleDescReq( &addr, pActiveEPs->nwkAddr, pActiveEPs->epList[j], 0 );   //send simple descriptor request to the responded end device
                break;  //exit from further request
              }
            }
            if ( pActiveEPs != NULL )
            {
              osal_mem_free( pActiveEPs );      //free memory
            }
          }
        }
        break;
      case Simple_Desc_rsp: 
        {
          ZDO_SimpleDescRsp_t simpleDescRsp;
          simpleDescRsp.simpleDesc.pAppInClusterList = simpleDescRsp.simpleDesc.pAppOutClusterList = NULL;        
          ZDO_ParseSimpleDescRsp( inMsg, &simpleDescRsp );
          if((simpleDescRsp.simpleDesc.pAppInClusterList[0] == TEMPERATURE_SENSOR_CMD_ID) && (simpleDescRsp.simpleDesc.EndPoint == TEMP_ENDPOINT_ID))   //match clusterid and endpoint to store short address in array
          {
            device_list[0].nwkAddr = simpleDescRsp.nwkAddr;     //store short address in array
          }
          else if((simpleDescRsp.simpleDesc.pAppInClusterList[0] == PIR_SENSOR_CMD_ID) && (simpleDescRsp.simpleDesc.EndPoint == PIR_SENSOR_ENDPOINT_ID))
          {
            device_list[1].nwkAddr = simpleDescRsp.nwkAddr;
          }
          else if((simpleDescRsp.simpleDesc.pAppInClusterList[0] == ENERGY_METER_ENDPOINT_ID) && (simpleDescRsp.simpleDesc.EndPoint == ENERGY_METER_ENDPOINT_ID))
          {
            device_list[2].nwkAddr = simpleDescRsp.nwkAddr;
          }

          if ( simpleDescRsp.simpleDesc.pAppInClusterList != NULL )     //free memory if not empty
          {
            osal_mem_free( simpleDescRsp.simpleDesc.pAppInClusterList );
          }
          if ( simpleDescRsp.simpleDesc.pAppOutClusterList != NULL )
          {
            osal_mem_free( simpleDescRsp.simpleDesc.pAppOutClusterList );
          }          
        }               
        break;