项目上有需求要控制投影机一键开和关，在主控主机上写一个中控软件控制，在网上查了一些资料，投影机都可通过串口线来控制(部分可以用网口控制)，这里我用的是串口控制，首先要拿到投影机的中控代码，直接找厂商要，公司用的是松下的PT-X3270，下面是中控代码。
串口9针头
3是接收，2是发送，5是接地波 特 率：19200bps
数 据 位：8位
停 止 位：1位
奇偶校验：无
同步方式：不同步
X参数：无
S参数：无
投影机开：02504F4E03
投影机关：02504F4603
电 脑1：024949533A52473103
电 脑2：024949533A52473203
视 频：024949533A56494403
H D M I：024949533A48443103
有了中控代码就很简单了，剩下的就是利用串口发数据了，关于串口就不多说了，网上很多。考虑到可能会控制不同型号的投影机，决定用XML来配置一些参数，要用到的重要参数也就3个，一个是波特率，不同型号的波特率可能会不一样，然后就是投影开关的串口数据了，这次用到两种型号的投影。
写一个存投影机数据的类
public class DataConfig
{public int id;public string portName;public int baudRate;public string openStr;public string closeStr;public DataConfig(XmlElement element){id = int.Parse(element.GetAttribute("id"));portName = element.GetAttribute("portName");baudRate = int.Parse(element.GetAttribute("baudRate"));openStr = element.GetAttribute("openStr");closeStr = element.GetAttribute("closeStr");}
}
废话不多说了，下面就是xml的读取，和串口发送数据了，直接上代码。
public class PortCtrl_2 : MonoBehaviour
{private string portName = "COM14";private int baudRate = 9600;//波特率private Parity parity = Parity.None;//奇偶校验private int dataBits = 8;//数据位private StopBits stopBits = StopBits.One;//停止位private string openStr = "02504F4E03";private string closeStr = "02504F4603";private Button btn_1_open;private Button btn_1_close;private Button btn_2_open;private Button btn_2_close;private DataConfig[] datas = new DataConfig[2];private SerialPort[] ports = new SerialPort[2];private string xmlPath;private void Start(){xmlPath = Application.streamingAssetsPath + "/ctrl2.xml";LoadXml(xmlPath);OpenPort();//投影1--18btn_1_open = GameObject.Find("Canvas/BG/View1/Open").GetComponent<Button>();btn_1_open.onClick.AddListener(() => WriteData(ports[0], datas[0].openStr));btn_1_close = GameObject.Find("Canvas/BG/View1/Close").GetComponent<Button>();btn_1_close.onClick.AddListener(() => WriteData(ports[0], datas[0].closeStr));//投影4-1--4-4btn_2_open = GameObject.Find("Canvas/BG/View2/Open").GetComponent<Button>();btn_2_open.onClick.AddListener(() => WriteData(ports[1], datas[1].openStr));btn_2_close = GameObject.Find("Canvas/BG/View2/Close").GetComponent<Button>();btn_2_close.onClick.AddListener(() => WriteData(ports[1], datas[1].closeStr));}private void OpenPort(){for (int i = 0; i < datas.Length; i++){SerialPort port = ports[i];ports[i] = new SerialPort("\\\\.\\" + datas[i].portName, datas[i].baudRate, parity, dataBits, stopBits);ports[i].ReadTimeout = 400;ports[i].WriteTimeout = 400;try{ports[i].Open();Debug.Log("打开串口......");}catch (Exception ex){Debug.Log(ex.Message);}}}private void ClosePort(){try{//关闭串口和接收线程for (int i = 0; i < ports.Length; i++){if (ports[i].IsOpen){ports[i].Close();}}}catch (Exception ex){Debug.Log(ex.Message);}}private void WriteData(SerialPort port, string str){if (port.IsOpen){byte[] array = strToHexByte(str);port.Write(array, 0, array.Length);}}private void OnApplicationQuit(){ClosePort();}private void Open(SerialPort port){WriteData(port, openStr);}private void Close(SerialPort port){WriteData(port, closeStr);}private void LoadXml(string path){if (File.Exists(xmlPath)){XmlDocument xmlDoc = new XmlDocument();xmlDoc.Load(path);XmlNodeList list = xmlDoc.SelectSingleNode("dataConfig").ChildNodes;XmlElement element1 = list[0] as XmlElement;portName = element1.GetAttribute("portName");for (int i = 0; i < datas.Length; i++){XmlElement element = list[i] as XmlElement;datas[i] = new DataConfig(element);}}}//16进制字符串转字节数组private byte[] strToHexByte(string hexString){hexString = hexString.Replace(" ", "");if ((hexString.Length % 2) != 0)hexString += " ";byte[] returnBytes = new byte[hexString.Length / 2];for (int i = 0; i < returnBytes.Length; i++)returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2), 16);return returnBytes;}//字节数组转16进制字符串public static string byteToHexStr(byte[] bytes){string returnStr = "";if (bytes != null){for (int i = 0; i < bytes.Length; i++){returnStr += bytes[i].ToString("X2");}}return returnStr;}
}
