Esempio n. 1
0
        public static bool SendData(byte[] TxBuffer, int TxLength, int RxLength)
        {
            int ReadByteSCount = 0, LeftByteSCount;
            int RetryTimes;

            byte[] ReadDatas = new byte[320];
            for (RetryTimes = 0; RetryTimes < 3; RetryTimes++)
            {
                try
                {
                    CommPort.DiscardOutBuffer();
                    CommPort.DiscardInBuffer();
                    CommPort.ReadTimeout = 400;                                          //200ms超时
                    CommPort.Write(TxBuffer, 0, TxLength);                               //写命令
                    if (TxBuffer[0] == 0xFE)
                    {
                        return(true);                                                    //对于子广播命令,发送命令后直接返回
                    }
                    ReadByteSCount = 0;
                    LeftByteSCount = RxLength;
                    if (TxBuffer[0] != 0xFE)
                    {
                        while (ReadByteSCount < RxLength)
                        {                                                                    //开始读取数据
                            ReadByteSCount += CommPort.Read(ReadDatas, ReadByteSCount, LeftByteSCount);
                            LeftByteSCount  = RxLength - ReadByteSCount;
                        }
                        if (ReadByteSCount >= RxLength)
                        {
                            RetryTimes = 1000;
                        }
                    }
                    else
                    {
                        break;
                    }
                }
                catch (TimeoutException)                                                 //读取超时
                {
                }
            }
            if (ReadByteSCount >= 5)
            {
                int Result = ModBusProc.ExpendRxMessage(ref Modbus232, ReadDatas, ReadByteSCount);
                if (Result == ModBusProc.MsgSuccess)
                {
                    return(true);
                }
            }
            if (TxBuffer[0] == 0xFE)
            {
                return(true);                                           //广播地址总是返回正确
            }
            return(false);
        }
Esempio n. 2
0
        public static bool WritePacket(int DevAddr, int StartReg, int RegCount, byte[] Datas, int DataLength)
        {
            if (CommByRS232.CommPort.IsOpen == false)
            {
                MessageBox.Show("端口未打开,请先打开端口!");
                return(false);
            }

            ModBusProc.CreateTxHeader(ref Modbus232, DevAddr, ModBusProc.CmdCode_Write, StartReg, RegCount, Datas, DataLength);
            byte[] TxBuffer = new byte[320];
            int    TxLength = ModBusProc.CreateTxMessage(ref Modbus232, ref TxBuffer);

            return(SendData(TxBuffer, TxLength, 8));
        }
Esempio n. 3
0
        public static bool ReadPacket(int DevAddr, int StartReg, int RegCount, ref byte[] Datas, ref int DataLength)
        {
            if (CommByRS232.CommPort.IsOpen == false)
            {
                MessageBox.Show("端口未打开,请先打开端口!");
                return(false);
            }

            bool R;

            ModBusProc.CreateTxHeader(ref Modbus232, DevAddr, ModBusProc.CmdCode_Read, StartReg, RegCount, Datas, 0);
            byte[] TxBuffer = new byte[320];
            int    TxLength = ModBusProc.CreateTxMessage(ref Modbus232, ref TxBuffer);

            R = SendData(TxBuffer, TxLength, 5 + RegCount * 2);
            if (R == true)
            {
                Array.Copy(Modbus232.RxMsg.DataBuffer, Datas, Modbus232.RxMsg.DataLenth);
                DataLength = Modbus232.RxMsg.DataLenth;
            }
            return(R);
        }
Esempio n. 4
0
 public static bool InitCommPort(string CommName, int BaudRate, int LocalAddr, bool LocalMode)
 {
     ModBusProc.Modbus_Create(ref Modbus232, LocalAddr, LocalMode);
     try
     {
         if (CommPort.IsOpen)
         {
             CommPort.Close();
         }
         CommPort.PortName = CommName;
         CommPort.BaudRate = BaudRate;
         CommPort.DataBits = 8;
         CommPort.Parity   = Parity.None;
         CommPort.StopBits = StopBits.One;
         CommPort.Open();
     }
     catch (Exception E)
     {
         MessageBox.Show("错误:" + E.Message, "串口打开错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
     }
     return(CommPort.IsOpen);
 }