148 lines
4.2 KiB
C#
148 lines
4.2 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Text;
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using System.IO.Ports;
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using System.Data;
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using DBFactory;
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namespace SimensSerialPort
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{
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/// <summary>
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/// 包含事件数据的类
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/// </summary>
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public class PortDataReciveEventArgs : EventArgs
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{
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private byte[] _data;
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public byte[] Data
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{
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get { return _data; }
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set { _data = value; }
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}
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public PortDataReciveEventArgs()
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{
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this._data = null;
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}
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public PortDataReciveEventArgs(byte[] data)
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{
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this._data = data;
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}
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}
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/// <summary>
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/// 托管的串口数据接收事件的句柄
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/// </summary>
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/// <param name="sender"></param>
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/// <param name="e"></param>
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public delegate void PortDataReceivedEventHandle(object sender, PortDataReciveEventArgs e);
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/// <summary>
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/// 串口通讯类
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/// </summary>
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public class PortData
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{
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public event PortDataReceivedEventHandle Received;
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public event SerialErrorReceivedEventHandler Error;
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public SerialPort port;
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public volatile bool ReceiveEventFlag = false; //接收事件是否有效 false表示有效
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DBOperator dbo = new DBOperator();
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//int _fid, mti;
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public PortData(string sPortName, int baudrate, Parity parity)
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{
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port = new SerialPort(sPortName, baudrate, parity, 8, StopBits.One);
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port.WriteBufferSize = 4096;
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port.RtsEnable = true;
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port.ReadTimeout = 3000;
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port.DataReceived += new SerialDataReceivedEventHandler(DataReceived);
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port.ErrorReceived += new SerialErrorReceivedEventHandler(ErrorEvent);
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//DataReceived 事件发生前内部输入缓冲区中的字节数
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port.ReceivedBytesThreshold = 16;
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dbo.Open();
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}
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~PortData()
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{
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Close();
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}
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public void Open()
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{
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if (!port.IsOpen)
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{
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port.Open();
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}
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}
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public void Close()
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{
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if (port.IsOpen)
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{
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port.Close();
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}
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}
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//数据发送
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public void SendData(byte[] data)
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{
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if (port.IsOpen)
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{
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port.Write(data, 0, data.Length);
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}
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}
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public void SendData(byte[] data, int offset, int count)
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{
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if (port.IsOpen)
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{
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port.Write(data, offset, count);
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}
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}
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//发送命令
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public int SendCommand(byte[] SendData, ref byte[] ReceiveData, int Overtime)
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{
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if (port.IsOpen)
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{
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ReceiveEventFlag = true; //关闭接收事件
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port.DiscardInBuffer(); //清空接收缓冲区
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port.DiscardOutBuffer(); //清空发送缓冲区
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port.Write(SendData, 0, SendData.Length);
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int num = 0, ret = 0;
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while (num++ < Overtime)
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{
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if (port.BytesToRead >= ReceiveData.Length) break;
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System.Threading.Thread.Sleep(1);
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}
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if (port.BytesToRead >= ReceiveData.Length)
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ret = port.Read(ReceiveData, 0, ReceiveData.Length);
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ReceiveEventFlag = false; //打开事件
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return ret;
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}
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return -1;
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}
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public void ErrorEvent(object sender, SerialErrorReceivedEventArgs e)
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{
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if (Error != null) Error(sender, e);
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}
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//数据接收
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public void DataReceived(object sender, SerialDataReceivedEventArgs e)
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{
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//禁止接收事件时直接退出
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if (ReceiveEventFlag) return;
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//是否应该是DataReceived 事件发生前内部输入缓冲区中的字节数
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//ReceivedBytesThreshold = 16而不是port.BytesToRead？？？
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byte[] data = new byte[port.BytesToRead];
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port.Read(data, 0, data.Length);
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if (Received != null)
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{
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Received(sender, new PortDataReciveEventArgs(data));
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}
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}
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public bool IsOpen()
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{
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return port.IsOpen;
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}
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}
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}
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