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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using FObjBase;
namespace FLY.ModbusModule
{
/// <summary>
/// 解决异步问题
/// </summary>
public class Serial
{
System.IO.Ports.SerialPort serial = new System.IO.Ports.SerialPort();
List<byte> in_buf = new List<byte>();
#region 锁
Mutex m_bufMutex = new Mutex();
void LockBuf() { m_bufMutex.WaitOne(); }
void UnlockBuf() { m_bufMutex.ReleaseMutex(); }
#endregion
public Serial()
{
serial.DataReceived += new System.IO.Ports.SerialDataReceivedEventHandler(serial_DataReceived);
}
void serial_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
{
int len = serial.BytesToRead;
byte[] buf = new byte[len];
serial.Read(buf, 0, len);
LockBuf();
in_buf.AddRange(buf);
if (in_buf.Count > serial.ReadBufferSize)
{
in_buf.RemoveRange(0, in_buf.Count - serial.ReadBufferSize);
}
UnlockBuf();
}
public string PortName
{
get{return serial.PortName;}
set{serial.PortName=value;}
}
public int BaudRate
{
get{return serial.BaudRate;}
set{serial.BaudRate=value;}
}
public int DataBits
{
get{return serial.DataBits;}
set{serial.DataBits=value;}
}
public System.IO.Ports.Parity Parity
{
get{return serial.Parity;}
set{serial.Parity=value;}
}
public System.IO.Ports.StopBits StopBits
{
get { return serial.StopBits; }
set { serial.StopBits = value; }
}
public bool IsOpen
{
get { return serial.IsOpen; }
}
public void Open()
{
LockBuf();
in_buf.Clear();
UnlockBuf();
serial.Open();
}
public void Close()
{
try
{
serial.Close();
}
catch (Exception e)
{
}
LockBuf();
in_buf.Clear();
UnlockBuf();
}
public int Read(byte[] buffer, int offset, int len)
{
LockBuf();
if (len > in_buf.Count())
len = in_buf.Count();
if (len == 0)
{
UnlockBuf();
return len;
}
in_buf.CopyTo(0, buffer, offset, len);
in_buf.RemoveRange(0, len);
UnlockBuf();
return len;
//serial.
}
public void Write(byte[] buffer, int offset, int count)
{
if(serial.IsOpen)
serial.Write(buffer, offset, count);
}
}
}