C# Modbus调试工具源码(RTU协议)

private static IModbusMaster master;
        private static SerialPort port;
        //写线圈或写寄存器数组
        private bool[] coilsBuffer;
        private ushort[] registerBuffer;
        //功能码
        private string functionCode;
        //功能码序号
        private int functionOder;
        //参数(分别为从站地址,起始地址,长度)
        private byte slaveAddress;
        private ushort startAddress;
        private ushort numberOfPoints;
        //串口参数
        private string portName;
        private int baudRate;
        private Parity parity;
        private int dataBits;
        private StopBits stopBits;
        //自动测试标志位
        private bool AutoFlag = false;
        //获取当前时间
        private System.DateTime Current_time;

        //定时器初始化
        private System.Timers.Timer t = new System.Timers.Timer(1000);
        
        private const int WM_DEVICE_CHANGE = 0x219;            //设备改变           
        private const int DBT_DEVICEARRIVAL = 0x8000;          //设备插入
        private const int DBT_DEVICE_REMOVE_COMPLETE = 0x8004; //设备移除