关于C#串口通信连续发送命令的问题

ningyb 2011-04-02 06:31:50

这样子的，我想实现一个这样的功能

一个生产线有一个电子看板，2个生产线的电子看板，连接一台电脑，

然后，我在这台电脑上，实现发送 2个命令接受 2台电子看板的信息

协议线都好了

现在，我实现的代码大概如下，



       private void RealTimeInfor_Load(object sender, EventArgs e)

        {

            LoadDgvData();//加载DataGridView数据

            comm.DataReceived += comm_DataReceived;//添加事件注册

            comm.RtsEnable = true;

            OpenPort();//打开端口

        }



timer控件   是  20秒  执行一次  SendCmd方法

        private void timer1_Tick(object sender, EventArgs e)

        {

            SendCmd();//发送命令

        }



/// <summary>

        /// 发送命令

        /// </summary>

        public void SendCmd()

        {

            List<string> userpowerList = UserInforManager.ProcessUserPower(TransferValue.uinfor.UserPower);//UserPower是用户 可以操作电子看板的Id号，和PortBaudrateCmd.xml里的key值对应

            string _key = string.Empty;

            string cmd = string.Empty;

            Dictionary<string, string> dic = ProcessXml.GetSureValue(System.IO.Directory.GetCurrentDirectory() + "/PortBaudrateCmd.xml");

            foreach (KeyValuePair<string, string> kvp in dic)

            {

                for (int j = 0; j < userpowerList.Count; j++)

                {

                    if (userpowerList[j] == kvp.Key)

                    {

                        try

                        {

                            comm.WriteLine(kvp.Value);

                            Thread.Sleep(300);

                        }

                        catch (Exception ex)

                        {

                            comm = new SerialPort();//捕获到异常信息，创建一个新的comm对象，之前的不能用了。

                            Console.WriteLine(ex.Message);//现实异常信息给客户。

                        }

                    }

                }

            }

        }



PortBaudrateCmd.xml



<?xml version="1.0" encoding="utf-8" ?>

<ConnectionInfor>

  <cinfors portname="COM5" baudrate="9600">

    <cinfor key="1" cmd="@01x39#"></cinfor>

    <cinfor key="2" cmd="@02x3A#"></cinfor>

    <cinfor key="3" cmd="@03x3B#"></cinfor>

    <cinfor key="4" cmd="@04x3C#"></cinfor>

    <cinfor key="5" cmd="@05x3D#"></cinfor>

    <cinfor key="6" cmd="@06x3E#"></cinfor>

    <cinfor key="7" cmd="@07x3F#"></cinfor>

    <cinfor key="8" cmd="@08x30#"></cinfor>

    <cinfor key="9" cmd="@09x31#"></cinfor>

    <cinfor key="10" cmd="@10x39#"></cinfor>

    <cinfor key="11" cmd="@11x38#"></cinfor>

    <cinfor key="12" cmd="@12x3B#"></cinfor>

    <cinfor key="13" cmd="@13x3A#"></cinfor>

    <cinfor key="14" cmd="@14x3D#"></cinfor>

    <cinfor key="15" cmd="@15x3C#"></cinfor>

    <cinfor key="16" cmd="@16x3F#"></cinfor>

    <cinfor key="17" cmd="@17x3E#"></cinfor>

  </cinfors>

</ConnectionInfor>



        private bool Listening = false;//是否没有执行完invoke相关操作   

        private bool Closing = false;//是否正在关闭串口，执行Application.DoEvents，并阻止再次invoke   



  void comm_DataReceived(object sender, SerialDataReceivedEventArgs e)

        {

            Thread.Sleep(500);

            if (Closing) return;  

            try

            {

                int n = comm.BytesToRead;

                byte[] buf = new byte[n];

                comm.Read(buf, 0, n);

                builder.Remove(0, builder.Length);

                this.Invoke((EventHandler)(delegate

                {

                    builder.Append(Encoding.ASCII.GetString(buf));

                    txtHome.Text = "";

                    txtHome.AppendText(builder.ToString());

                    //

                    Console.WriteLine(txtHome.Text);

                    if (txtHome.Text.Length > 0 && txtHome.Text.Length % 81 == 0)

                    {

                        string[] first = ProcessSerialportData.InitProcess(txtHome.Text); //第一次处理数据

                        if (first == null)

                        {

                            return;

                        }

                        RealTimeInfo rti = ProcessSerialportData.AgainProcess(first);//第二次处理数据

                        if (rti != null)//没有就增加，有就更新

                        {

                            int num = RealTimeInfoManager.AddRealTimeInfor(rti);

                            LoadDgvData();//重写绑定数据

                            Console.WriteLine(num);

                        }

                    }

                }));

            }

            catch (Exception e2)

            {

                Console.WriteLine(e2.Message);

            }

            finally

            {

                Listening = false;

            }



        }