应用SerialPort实现串口扫码枪ST2200操作

水深无声 2022-06-17 05:10 257阅读 0赞

引用串口类：System.IO.Ports.SerialPort

直接贴代码：

/// <summary>
        /// 串口 扫描枪
        /// </summary>
        public class ScanProvider
        {
            private SerialPort _serialPort;
    
            public ScanProvider(string portName, int baudRate)
            {
                _serialPort = new SerialPort();
                this.RegisterSerialPort(portName, baudRate);
                _serialPort.DataReceived +=_serialPort_DataReceived;
            }
    
            #region Private Methods
    
            /// <summary>
            /// 注册串口
            /// </summary>
            /// <param name="portName">串口名</param>
            /// <param name="baudRate">波特率</param>
            private void RegisterSerialPort(string portName, int baudRate)
            {
                // 串口名
                _serialPort.PortName = portName;
                // 波特率
                _serialPort.BaudRate = baudRate;
                // 数据位
                _serialPort.DataBits = 8;
                // 停止位
                _serialPort.StopBits = System.IO.Ports.StopBits.One;
                // 无奇偶校验位
                _serialPort.Parity = System.IO.Ports.Parity.None;
            }
    
            #endregion
    
            #region Public 
    
            /// <summary>
            /// 是否处于打开状态
            /// </summary>
            public bool IsOpen
            {
                get
                {
                    return _serialPort != null && _serialPort.IsOpen;
                }
            }
    
            /// <summary>
            /// 打开串口
            /// </summary>
            /// <returns></returns>
            public bool Open()
            {
                if (_serialPort == null)
                    return this.IsOpen;
    
                if (_serialPort.IsOpen)
                    this.Close();
    
                _serialPort.Open();
    
                return this.IsOpen;
            }
    
            /// <summary>
            /// 关闭串口
            /// </summary>
            public void Close()
            {
                if (this.IsOpen)
                    _serialPort.Close();
            }
    
            /// <summary>
            /// 向串口内写入
            /// </summary>
            /// <param name="send">写入数据</param>
            /// <param name="offSet">偏移量</param>
            /// <param name="count">写入数量</param>
            public void Write(byte[] send, int offSet, int count)
            {
                if (this.IsOpen)
                {
                    _serialPort.Write(send, offSet, count);
                }
            }
    
            public void Dispose()
            {
                if (this._serialPort == null)
                    return;
                if (this._serialPort.IsOpen)
                    this.Close();
                this._serialPort.Dispose();
                this._serialPort = null;
            }
    
            #endregion
    
            void _serialPort_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
            {
                // 等待100ms，防止读取不全的情况
                Thread.Sleep(100);
                byte[] m_recvBytes = new byte[_serialPort.BytesToRead];//定义缓冲区大小
                int result = _serialPort.Read(m_recvBytes, 0, m_recvBytes.Length);//从串口读取数据
                if (result <= 0)
                    return;
                string strResult = Encoding.ASCII.GetString(m_recvBytes, 0, m_recvBytes.Length);//对数据进行转换
                _serialPort.DiscardInBuffer();
    
                if (this.DataReceived != null)
                    this.DataReceived(this, new SerialSortEventArgs() { Code = strResult });
            }
    
            public event EventHandler<SerialSortEventArgs> DataReceived;
    
            #region Static
    
            /// <summary>
            /// 获取可用串口名称
            /// </summary>
            /// <returns></returns>
            public static string[] GetComNames()
            {
                string[] names = null;
                try
                {
                    names = SerialPort.GetPortNames();
                }
                catch (Exception ex)
                {
                    throw ex;
                }
                return names;
            }
    
            #endregion
        }
    
        public class SerialSortEventArgs
        {
            public string Code { get; set; }
        }

应用：

public partial class MainWindow : Window
        {
            ScanProvider _scanner;
    
            public MainWindow()
            {
                InitializeComponent();
                // 打开串口
                _scanner = new ScanProvider("COM1", 115200);
                // 打开串口
                if (_scanner.Open())
                    //关联事件处理程序
                    _scanner.DataReceived += _scanner_DataReceived;
            }
    
            void _scanner_DataReceived(object sender, SerialSortEventArgs e)
            {
                this.Dispatcher.BeginInvoke(new Action<string>((args) =>
                    {
                        this.txtIDCard.Text = args;
                    }), e.Code);
            }
        }

其中波特率根据具体的扫码枪设定。

我的扫码枪型号：ScanHome ST2200 。