using System.Data;
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using System.Text;
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using RJCP.IO.Ports;
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namespace WIDESEAWCS_SerialPortServices
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{
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public class SerialPortService
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{
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private readonly SerialPortStream _serialPortStream;
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private CancellationTokenSource _cancellationTokenSource;
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private Task _sendTask;
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private int commandType = 2;
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// 命令字符串
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private string command0 = ""; // 不发送命令
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private string command1 = "824070241JNT\r"; //发送信号
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private string command2 = "824070241JNT,0005000,+0001000[+TOL],-0001000[-TOL]\r"; //设值
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// 用于存储接收到的数据
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private List<string> receivedDataList = new List<string>();
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// 构造函数
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public SerialPortService(string port)
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{
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_serialPortStream = new SerialPortStream(port)
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{
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BaudRate = 9600,
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Parity = Parity.None,
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DataBits = 8,
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StopBits = StopBits.One,
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DtrEnable = true,
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RtsEnable = true
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};
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//串口接收到数据时，_serialPortStream 会自动触发 DataReceived 事件
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_serialPortStream.DataReceived += OnDataReceived; //接收串口发出的数据
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}
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// 打开串口并开始持续发送信号
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public void OpenSerialPort()
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{
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if (!_serialPortStream.IsOpen)
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{
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_serialPortStream.Open();
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StartSendingData();//开启后台循环
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}
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}
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// 关闭串口并停止发送信号
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public void CloseSerialPort()
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{
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if (_serialPortStream.IsOpen)
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{
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_serialPortStream.Close();
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}
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}
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// 发送数据一次
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public void SendData(string data)
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{
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if (_serialPortStream.IsOpen)
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{
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byte[] bytesToSend = Encoding.ASCII.GetBytes(data);
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_serialPortStream.Write(bytesToSend, 0, bytesToSend.Length);//将数据发送到串口
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}
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}
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// 获取串口状态
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public bool GetSerialPortStatus()
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{
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return _serialPortStream.IsOpen;
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}
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// 获取接收到的所有数据
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public List<string> GetReceivedData()
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{
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return receivedDataList;
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}
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// 处理接收到的数据
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//每当串口收到数据时，会触发此方法
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private void OnDataReceived(object sender, SerialDataReceivedEventArgs e)
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{
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//从串口接收数据，并将接收到的数据转换为字符串
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byte[] buffer = new byte[1024];//一个字节数组 buffer，大小为 1024 字节
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int bytesRead = _serialPortStream.Read(buffer, 0, buffer.Length);//从串口流 _serialPortStream 中读取数据并将其存入 buffer 数组中。
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string receivedData = Encoding.ASCII.GetString(buffer, 0, bytesRead);//将接收到的字节数据转换成一个字符串
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//这里写一个方法用于判断每次receivedDat是否满足条件
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//截取设备编号后的俩为是否为03，03成功就进行下步
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receivedDataList.Add(receivedData);
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// 处理命令切换逻辑
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if (commandType == 2 && receivedData.Contains("ParseOK"))
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{
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commandType = 1;
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}
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else if (commandType == 1 && (receivedData.Contains("82407024103") || receivedData.Contains("82407024104")))
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{
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commandType = 2;
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}
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}
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// 启动后台任务，每隔一段时间发送信号
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private void StartSendingData()
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{
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_cancellationTokenSource = new CancellationTokenSource();
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_sendTask = Task.Run(() =>
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{
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while (_serialPortStream.IsOpen)
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{
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string command = command0;
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//先判断commandType
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if (commandType == 1)
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{
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command = command1;
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}
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else if (commandType == 2)
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{
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command = command2;
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}
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//再检查 command 字符串是否为空或 null
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if (!string.IsNullOrEmpty(command))
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{
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byte[] dataToSend = Encoding.ASCII.GetBytes(command);//将command转成字节数组
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//（三个参数的含义，1数组，2从第0位开始截取，3是要发送的字节数，这里表示整个字节数组的长度）
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_serialPortStream.Write(dataToSend, 0, dataToSend.Length);//最后向串口发送数据
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}
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Thread.Sleep(1000); // 每隔1秒发送一次命令
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}
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});
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}
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}
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}
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