Unity3d 与串口的通信程序的开发，软件硬件结合

C#串口介绍以及简单串口通信程序设计实现

简单的串口通信工具，基于C#应用程序WinFrom实现

串口介绍

　　串行接口简称串口，也称串行通信接口或串行通讯接口（通常指COM接口），是采用串行通信方式的扩展接口。（至于再详细，自己百度）

串口应用：

　　工业领域使用较多，比如:数据采集，设备控制等等，好多都是用串口通信来实现！你要是细心的话，你会发现，目前家用国网智能电能表就具备RS485通信总线（串行总线的一种）与RS232可以相互转化（当然一般，非专业的谁也不会闲的蛋疼，趴电表上瞎看,最多也就看看走了多少度电）

RS232 DB9介绍：

1.示意图

2.针脚介绍：

1.  载波检测(DCD) 
2.  接受数据(RXD) 
3.  发出数据(TXD) 
4.  数据终端准备好(DTR) 
5.  信号地线(SG)
6.  数据准备好(DSR)
7.  请求发送(RTS)
8.  清除发送(CTS)
9.  振铃指示(RI)

3.实物图：

以下是一个usb转串口线：这个头就是一个公头，另一端是一个usb口

笨小孩串口工具运行图：

1.开启程序

2.发送一行字符串HelloBenXH，直接将针脚的发送和接收链接起来就可以测试了（针脚2 接受数据(RXD) 和3 发出数据(TXD)）直接链接,

C#代码实现：采用SerialPort

1.实例化一个SerialPort

1 private SerialPort ComDevice = new SerialPort();

2.初始化参数绑定接收数据事件

 1 public void init() 2         { 3             btnSend.Enabled = false; 4             cbbComList.Items.AddRange(SerialPort.GetPortNames()); 5             if (cbbComList.Items.Count > 0) 6             { 7                 cbbComList.SelectedIndex = 0; 8             } 9             cbbBaudRate.SelectedIndex = 5;10             cbbDataBits.SelectedIndex = 0;11             cbbParity.SelectedIndex = 0; 12             cbbStopBits.SelectedIndex = 0;13             pictureBox1.BackgroundImage = Properties.Resources.red;14 15             ComDevice.DataReceived += new SerialDataReceivedEventHandler(Com_DataReceived);//绑定事件16             17         }

3.打开串口button事件

 1 /// <summary> 2         /// 打开串口 3         /// </summary> 4         /// <param name="sender"></param> 5         /// <param name="e"></param> 6         private void btnOpen_Click(object sender, EventArgs e) 7         { 8             if (cbbComList.Items.Count <= 0) 9             {10                 MessageBox.Show("没有发现串口,请检查线路！");11                 return;12             }13 14             if (ComDevice.IsOpen == false)15             {16                 ComDevice.PortName = cbbComList.SelectedItem.ToString();17                 ComDevice.BaudRate = Convert.ToInt32(cbbBaudRate.SelectedItem.ToString());18                 ComDevice.Parity = (Parity)Convert.ToInt32(cbbParity.SelectedIndex.ToString());19                 ComDevice.DataBits = Convert.ToInt32(cbbDataBits.SelectedItem.ToString());20                 ComDevice.StopBits = (StopBits)Convert.ToInt32(cbbStopBits.SelectedItem.ToString());21                 try22                 {23                     ComDevice.Open();24                     btnSend.Enabled = true;25                 }26                 catch (Exception ex)27                 {28                     MessageBox.Show(ex.Message, "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);29                     return;30                 }31                 btnOpen.Text = "关闭串口";32                 pictureBox1.BackgroundImage = Properties.Resources.green;33             }34             else35             {36                 try37                 {38                     ComDevice.Close();39                     btnSend.Enabled = false;40                 }41                 catch (Exception ex)42                 {43                     MessageBox.Show(ex.Message, "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);44                 }45                 btnOpen.Text = "打开串口";46                 pictureBox1.BackgroundImage = Properties.Resources.red;47             }48 49             cbbComList.Enabled = !ComDevice.IsOpen;50             cbbBaudRate.Enabled = !ComDevice.IsOpen;51             cbbParity.Enabled = !ComDevice.IsOpen;52             cbbDataBits.Enabled = !ComDevice.IsOpen;53             cbbStopBits.Enabled = !ComDevice.IsOpen;54         }

4.发送数据

 1 /// <summary> 2         /// 发送数据 3         /// </summary> 4         /// <param name="sender"></param> 5         /// <param name="data"></param> 6         public bool SendData(byte[] data) 7         { 8             if (ComDevice.IsOpen) 9             {10                 try11                 {12                     ComDevice.Write(data, 0, data.Length);//发送数据13                     return true;14                 }15                 catch (Exception ex)16                 {17                     MessageBox.Show(ex.Message, "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);18                 }19             }20             else21             {22                 MessageBox.Show("串口未打开", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);23             }24             return false;25         }26 27         /// <summary>28         /// 发送数据button事件29         /// </summary>30         /// <param name="sender"></param>31         /// <param name="e"></param>32         private void btnSend_Click(object sender, EventArgs e)33         {34             byte[] sendData = null;35 36             if (rbtnSendHex.Checked)37             {38                 sendData = strToHexByte(txtSendData.Text.Trim());39             }40             else if (rbtnSendASCII.Checked)41             {42                 sendData = Encoding.ASCII.GetBytes(txtSendData.Text.Trim());43             }44             else if (rbtnSendUTF8.Checked)45             {46                 sendData = Encoding.UTF8.GetBytes(txtSendData.Text.Trim());47             }48             else if (rbtnSendUnicode.Checked)49             {50                 sendData = Encoding.Unicode.GetBytes(txtSendData.Text.Trim());51             }52             else53             {54                 sendData = Encoding.ASCII.GetBytes(txtSendData.Text.Trim());55             }56 57             if (this.SendData(sendData))//发送数据成功计数58             {59                 lblSendCount.Invoke(new MethodInvoker(delegate60                 {61                     lblSendCount.Text = (int.Parse(lblSendCount.Text) + txtSendData.Text.Length).ToString();62                 }));63             }64             else65             {66 67             }68 69         }70 71         /// <summary>72         /// 字符串转换16进制字节数组73         /// </summary>74         /// <param name="hexString"></param>75         /// <returns></returns>76         private byte[] strToHexByte(string hexString)77         {78             hexString = hexString.Replace(" ", "");79             if ((hexString.Length % 2) != 0)80                 hexString += " ";81             byte[] returnBytes = new byte[hexString.Length / 2];82             for (int i = 0; i < returnBytes.Length; i++)83                 returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2).Replace(" ",""), 16);84             return returnBytes;85         }

5.接收和数据输出

 1 /// <summary> 2         /// 接收数据 3         /// </summary> 4         /// <param name="sender"></param> 5         /// <param name="e"></param> 6         private void Com_DataReceived(object sender, SerialDataReceivedEventArgs e) 7         { 8             byte[] ReDatas = new byte[ComDevice.BytesToRead]; 9             ComDevice.Read(ReDatas, 0, ReDatas.Length);//读取数据10             this.AddData(ReDatas);//输出数据11         }12        13         /// <summary>14         /// 添加数据15         /// </summary>16         /// <param name="data">字节数组</param>17         public void AddData(byte[] data)18         {19             if (rbtnHex.Checked)20             {21                 StringBuilder sb = new StringBuilder();22                 for (int i = 0; i < data.Length; i++)23                 {24                     sb.AppendFormat("{0:x2}" + " ", data[i]);25                 }26                 AddContent(sb.ToString().ToUpper());27             }28             else if (rbtnASCII.Checked)29             {30                 AddContent(new ASCIIEncoding().GetString(data));31             }32             else if (rbtnUTF8.Checked)33             {34                 AddContent(new UTF8Encoding().GetString(data));35             }36             else if (rbtnUnicode.Checked)37             {38                 AddContent(new UnicodeEncoding().GetString(data));39             }40             else41             {}42           43             lblRevCount.Invoke(new MethodInvoker(delegate44             {45                 lblRevCount.Text = (int.Parse(lblRevCount.Text) + data.Length).ToString();46             }));47         }48 49 50         /// <summary>51         /// 输入到显示区域52         /// </summary>53         /// <param name="content"></param>54         private void AddContent(string content)55         {56             this.BeginInvoke(new MethodInvoker(delegate57             {58                 if(chkAutoLine.Checked && txtShowData.Text.Length>0)59                 {60                     txtShowData.AppendText("\r\n");61                 }62                 txtShowData.AppendText(content);63             }));64         }

6.清空数据区域事件

 1 /// <summary> 2         /// 清空接收区 3         /// </summary> 4         /// <param name="sender"></param> 5         /// <param name="e"></param> 6         private void btnClearRev_Click(object sender, EventArgs e) 7         { 8             txtShowData.Clear(); 9         }10 11         /// <summary>12         /// 清空发送区13         /// </summary>14         /// <param name="sender"></param>15         /// <param name="e"></param>16         private void btnClearSend_Click(object sender, EventArgs e)17         {18             txtSendData.Clear();19         }

 运行程序下载地址  BXHSerialPort.exe

源代码工程文件下载

OK 步入正题

二、Unity3d与串口通信程序的开发

先做一个简单的UI，用来控制串口设备的开关

代码就比较简单了

自定义端口API类