C#SerialPort实现串口控制继电器

最近做了一个小系统，麻雀虽小五脏俱全呀，用到各种线程控制，串口控制等技术。其中串口控制最麻烦，因为继电器的响应很快，根据不同的转接口，返回的数据质量是不一样的，所以不能直接wirte，然后马上read，这样经常得到的效应状态是错误的。因此需要用到backgroundworker不停地read，校验数据成功后再设置成功状态标志，最后让timer定时获取改标志，成功后立即控制程序界面上的按钮等控件。

public void openSerial()

        {

            try

            {

                foreach (GlobaConfig config in GlobaConfigInstance.Instance)

                {

                    if ((!config.SerialPort.IsOpen))

                    {

                        config.SerialPort.Open();

                        config.SerialPort.DiscardInBuffer();

                        config.SerialPort.DiscardOutBuffer();

                    }

                }

            }

            catch(Exception ex)

            {

                //MessageBox.Show("打开失败！" + ex.Message);

                NotificationManager.Show(this, "打开失败！" + ex.Message,

                                Color.Gold, 1000);

                return;

            }

        }



private void SendOpenDemand(byte port)

        {

            byte[] buffer = new byte[20];

            byte[] buffer2 = new byte[2];

            buffer[0] = GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].Addr;

            buffer[1] = 5;

            buffer[2] = 0;

            buffer[3] = port;

            buffer[4] = 0xff;

            buffer[5] = 0;

            A101.GetCRC(buffer, 6, buffer2);

            buffer[6] = buffer2[0];

            buffer[7] = buffer2[1];

            if (GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].SerialPort.IsOpen)

            {

                this.SerialSendFrame(buffer, 0, 8);

            }

            else

            {

                //MessageBox.Show("亲，你要先打开串口哦！");

            }

        }





        private void SendCloseDemand(byte port)

        {

            byte[] buffer = new byte[20];

            byte[] buffer2 = new byte[2];

            buffer[0] = GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].Addr;

            buffer[1] = 5;

            buffer[2] = 0;

            buffer[3] = port;

            buffer[4] = 0;

            buffer[5] = 0;

            A101.GetCRC(buffer, 6, buffer2);

            buffer[6] = buffer2[0];

            buffer[7] = buffer2[1];

            if (GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].SerialPort.IsOpen)

            {

                this.SerialSendFrame(buffer, 0, 8);

            }

            else

            {

                //MessageBox.Show("亲，你要先打开串口哦！");

            }

        }



private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)

        {

            byte[] buffer;

            while (true)

            {

                try

                {



                    if (GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].SerialPort.IsOpen)

                    {

                        int bytesToRead = GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].SerialPort.BytesToRead;

                        buffer = new byte[0xff];

                        if (bytesToRead > 0)

                        {

                            int num2;

                            bytesToRead = 0x45;

                            GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].SerialPort.Read(buffer, 0, bytesToRead);

                            bool isValid = A101.ValidCRC(buffer, (byte)bytesToRead);

                            System.Diagnostics.Debug.WriteLine("isValid: " + isValid);

                            if (isValid)

                            {

                                for (num2 = 0; num2 < bytesToRead; num2++)

                                {

                                    this.SerialRecBuf[num2] = buffer[num2];

                                }



                                this.SerialRecFlag = true;

                            }

                            else

                                this.SerialRecFlag = false;



                        }

                    }

                }

                catch (Exception ex)

                {

                    

                    Console.WriteLine(ex);

                }

                Thread.Sleep(1);

            }

        }



        private void timer1_Tick(object sender, EventArgs e)

        {

            if (this.SerialRecFlag)

            {

                this.SerialRecFlag = false;

                if (((this.SerialRecBuf[0] == GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].Addr) && (this.SerialRecBuf[1] == 5)) && (this.SerialRecBuf[4] == 0))

                {

                    this.BtnSendFlag = false;

                    if (GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].SerialPort.IsOpen)

                    {

                        Control[] controls = this.kryptonNavigator1.SelectedPage.Controls.Find("btnRelay" + kryptonNavigator1.SelectedIndex + this.SerialRecBuf[3], true);

                        if (controls.Length > 0)

                        {

                            KryptonCheckButton button = controls[0] as KryptonCheckButton;

                            button.Checked = false;

                            button.Tag = "断开";

                            button.Enabled = true;

                        }

                    }

                }

                else if (((this.SerialRecBuf[0] == GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].Addr) && (this.SerialRecBuf[1] == 5)) && (this.SerialRecBuf[4] == 0xff))

                {

                    this.BtnSendFlag = false;



                    if (GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].SerialPort.IsOpen)

                    {

                        Control[] controls = this.kryptonNavigator1.SelectedPage.Controls.Find("btnRelay" + kryptonNavigator1.SelectedIndex + this.SerialRecBuf[3], true);

                        if (controls.Length > 0)

                        {

                            KryptonCheckButton button = controls[0] as KryptonCheckButton;

                            button.Checked = true;

                            button.Tag = "闭合";

                            button.Enabled = true;

                        }

                    }

                }

                else if (((this.SerialRecBuf[0] == GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].Addr) && (this.SerialRecBuf[1] == 1)) && (this.SerialRecBuf[2] == 4))

                {

                    uint[] numArray = new uint[4];

                    uint resource = 0;

                    numArray[0] = this.SerialRecBuf[3];

                    numArray[1] = this.SerialRecBuf[4];

                    numArray[2] = this.SerialRecBuf[5];

                    numArray[3] = this.SerialRecBuf[6];

                    resource = (((numArray[3] << 0x18) | (numArray[2] << 0x10)) | (numArray[1] << 8)) | numArray[0];



                    if (GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].SerialPort.IsOpen)

                    {

                        foreach (Control control in this.kryptonNavigator1.SelectedPage.Controls[2].Controls)

                        {

                            KryptonCheckButton button = control as KryptonCheckButton;

                            if (this.GetRegBit(resource, (byte)control.TabIndex) == 0)

                            {

                                button.Checked = false;

                                button.Tag = "断开";

                            }

                            else

                            {

                                button.Checked = true;

                                button.Tag = "闭合";

                            }

                            button.Enabled = true;

                        }

                    }

                }



            }

        }



        private void timer2_Tick(object sender, EventArgs e)

        {

            if (!this.BtnSendFlag)

            {

                byte[] buffer = new byte[20];

                byte[] buffer2 = new byte[2];

                buffer[0] = GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].Addr;

                buffer[1] = 1;

                buffer[2] = 0;

                buffer[3] = 0;

                buffer[4] = 0;

                buffer[5] = 0x1c;

                A101.GetCRC(buffer, 6, buffer2);

                buffer[6] = buffer2[0];

                buffer[7] = buffer2[1];

                System.Diagnostics.Debug.WriteLine(kryptonNavigator1.SelectedIndex + ":" + GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].SerialPort.IsOpen);

                if (GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].SerialPort.IsOpen)

                {

                    this.SerialSendFrame(buffer, 0, 8);

                    this.timer1.Start();

                }

                else

                {

                    if (GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].IsValid == true)

                    {

                        GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].IsValid = false;

                        try

                        {

                            GlobaConfigInstance.Instance[kryptonNavigator1.SelectedIndex].SerialPort.Open();

                            //修復退出的線程

                            //this.timer1 = new System.Windows.Forms.Timer();

                            this.timer1.Start();

                        }

                        catch (Exception ex)

                        {

                            NotificationManager.Show(this, "主机" + (kryptonNavigator1.SelectedIndex + 1) + "出现异常：" + ex.Message, 

                                Color.Gold, 1000);

                            //MessageBox.Show("主机" + (kryptonNavigator1.SelectedIndex + 1) + "出现异常：" + ex.Message);

                        }

                    }

                }

            }

        }