public void Sp_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)

        {

            string strTemp = "";

            double iSecond = 0.5;



            DateTime dtOld = System.DateTime.Now;

            DateTime dtNow = System.DateTime.Now;

            TimeSpan dtInter;

            dtInter = dtNow - dtOld;



            int i = Sp.BytesToRead;

            if (i > 0)

            {

                try

                {

                    strTemp = Sp.ReadExisting();

                }

                catch

                { }

                if (strTemp.ToLower().IndexOf("\r") < 0)

                {

                    i = 0;

                }

                else

                {

                    this.Invoke(interfaceUpdataHandle, strTemp);

                }

            }

            while (dtInter.TotalSeconds < iSecond && i <= 0)

            {

                dtNow = System.DateTime.Now;

                dtInter = dtNow - dtOld;

                i = Sp.BytesToRead;

                if (i > 0)

                {

      &n