//定义串口

        private SerialPort comm;     

        private long received_count = 0;//接收计数

        private long send_count = 0;//发送计数

        byte c = 51;

        public Form1()

        {

            InitializeComponent();

           

             

        

        }



        private void Form1_Load(object sender, EventArgs e)

        {

            

            comm = new SerialPort("COM4", 1200);

           

            //添加事件注册

            comm.DataReceived += comm_DataReceived;

            comm.ReceivedBytesThreshold = 1;

            

        }



        //数据接收

        void comm_DataReceived(object sender, SerialDataReceivedEventArgs e)

        {

            int n = comm.BytesToRead;//先记录下来，避免某种原因，人为的原因，操作几次之间时间长，缓存不一致

            byte[] buf = new byte[n];//声明一个临时数组存储当前来的串口数据

            received_count += n;//增加接收计数

            comm.Read(buf, 0, n);//读取缓冲数据          

            //因为要访问ui资源，所以需要使用invoke方式同步ui。

            this.Invoke((EventHandler)(delegate

            {

                //依次的拼接出16进制字符串   

                string ReceivedStr = GetHexStrFromByte(buf);                

                this.label1.Text = GetAm(ReceivedStr);

               

                

            }));

      &n