C#串口操作类
最近由于工作需要，在研究串口通讯的问题，下面分享一下关于串口的一个操作类，有不足之处，希望大家一起提出改善。
using System;
using System.Collections.Generic;
using System.Text;
using System.IO.Ports;
namespace 数据下载
{
///
/// 对串口进行操作的类，其中包括写和读操作
///
public class SerialClass
{
public SerialPort _serialPort = null;
//定义委托
public delegate void SerialPortDataReceiveEventArgs(object sender, SerialDataReceivedEventArgs e, byte[] bits);
//定义接收数据事件
public event SerialPortDataReceiveEventArgs DataReceived;
public bool ReceiveEventFlag = false; //接收事件是否有效 false表示有效
///
/// 默认构造函数，操作COM1，速度为9600，没有奇偶校验，8位字节，停止位为1
///
public SerialClass()
{
_serialPort = new SerialPort("COM1", 9600, Parity.None, 8, StopBits.One);
setSerialPort();
}
///
/// 构造函数,可以自定义串口的初始化参数
///
/// 需要操作的COM口名称
/// COM的速度
/// 奇偶校验位
/// 数据长度
/// 停止位
public SerialClass(string comPortName, int baudRate, Parity parity, int dataBits, StopBits stopBits)
{
_serialPort = new SerialPort(comPortName, baudRate, parity, dataBits, stopBits);
setSerialPort();
}
///
/// 设置串口资源,还需重载多个设置串口的函数
///
void setSerialPort()
{
if (_serialPort != null)
{
//设置触发DataReceived事件的字节数为1
_serialPort.ReceivedBytesThreshold = 1;
//接收到一个字节时，也会触发DataReceived事件
_serialPort.DataReceived += new SerialDataReceivedEventHandler(_serialPort_DataReceived);
//接收数据出错,触发事件
_serialPort.ErrorReceived += new SerialErrorReceivedEventHandler(_serialPort_ErrorReceived);
}
}
///
/// 打开串口资源
///
public bool openPort()
{
bool ok = false;
//如果串口是打开的，先关闭
if (_serialPort.IsOpen)
_serialPort.Close();
try
{
//打开串口
_serialPort.Open();
ok = true;
}
catch (Exception Ex)
{
throw Ex;
}
return ok;
}
///
/// 关闭串口资源,操作完成后,一定要关闭串口
///
public void closePort()
{
//如果串口处于打开状态,则关闭
if (_serialPort.IsOpen)
_serialPort.Close();
}
///
/// 获取端口连接状态
///
///
public bool getIsOpen()
{
//如果串口是打开的，true,否则为false;
bool flag = false;
try { flag = _serialPort.IsOpen; }
catch{}
return flag ;
}
///
/// 接收串口数据事件
///
///
///
void _serialPort_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
if (ReceiveEventFlag) return;
if (DataReceived != null)
{
Thread.Sleep(100);
byte[] buf = new byte[100];
int readcount = 0;
while (_serialPort.BytesToRead > 0)
{
readcount = _serialPort.Read(buf, 0, buf.Length);
DataReceived(sender, e, buf);
}
}
}
///
/// 接收数据出错事件
///
///
///
void _serialPort_ErrorReceived(object sender, SerialErrorReceivedEventArgs e)
{
}
///
/// 串口数据发送
///
///
public void SendData(string data)
{
if (_serialPort.IsOpen)
{
byte[] buf = System.Text.Encoding.GetEncoding("gb2312").GetBytes(data);
_serialPort.Write(buf,0, buf.Length); }
}
public void SendData(byte[] data, int offset, int count)
{
if (_serialPort.IsOpen)
{
_serialPort.Write(data, offset, count);
}
}
///
/// 发送命令
///
///
///
///
///
public int SendCommand(byte[] SendData, ref byte[] ReceiveData, int Overtime)
{
if (_serialPort.IsOpen)
{
ReceiveEventFlag = true; //关闭接收事件
_serialPort.DiscardInBuffer(); //清空接收缓冲区
_serialPort.Write(SendData, 0, SendData.Length);
int num = 0, ret = 0;
while (num++ < Overtime)
{
if (_serialPort.BytesToRead >= ReceiveData.Length) break;
System.Threading.Thread.Sleep(1);
}
if (_serialPort.BytesToRead >= ReceiveData.Length)
ret = _serialPort.Read(ReceiveData, 0, ReceiveData.Length);
ReceiveEventFlag = false; //打开事件
return ret;
}
return -1;
}
///
/// 获取所有已连接短信猫设备的串口
///
///
public string[] serialsIsConnected()
{
List
string[] seriallist = getSerials();
return lists.ToArray();
}
///
/// 获得当前电脑上的所有串口资源
///
///
public string[] getSerials()
{
return SerialPort.GetPortNames();
}
}
}