bool R = true;
        private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e)
        {
            if (!R) return;

            if (sReceiver.BytesToRead == 0)
            {
                return;
            }

            int ArraySum = sReceiver.BytesToRead;
            byte[] InputArray = new byte[ArraySum];
            sReceiver.Read(InputArray, 0, ArraySum);

            foreach (byte b in InputArray)
            {
                if (b == 0xFF)
                {
                    R = false;
                    return;
                }
                //处理数据
            }
        }