/// <summary>
/// 串口异步回调监听（全双工模式）
/// </summary>
/// <param name="AscallBack"></param>
/// <returns></returns>
public bool BeginListening(AsyncSerailCallback AscallBack)
{
if (!spCom.IsOpen)
{
return(false);
}
stopReceive = false;
spCom.DiscardInBuffer();
spCom.DiscardOutBuffer();
System.Threading.ThreadPool.QueueUserWorkItem(new System.Threading.WaitCallback(fullDuplexReadReceive), (object)AscallBack);
return(true);
}
/// <summary>
/// 全双工读取缓冲区数据
/// <param name="asc">异步回调函数指针</param>
/// </summary>
private void fullDuplexReadReceive(object asc)
{
AsyncSerailCallback callback = null;
if (asc != null)
{
callback = (AsyncSerailCallback)asc;
}
if (!spCom.IsOpen)
{
return;
}
List <byte> tmpList = new List <byte>();
while (!stopReceive)
{
mre.Reset(); //线程标志
byte[] tmpbuff;
DateTime dt1 = DateTime.Now;
bool isRead = false;
//lock (ThreadObject) //串口互斥（防止多线程操作的时候，该接收线程还在运行，其他线程关闭串口的情况发生）
//{
while (TimeSub(DateTime.Now, dt1) < (double)byteTimeOut) //字节间最大等待超时时间
{
if (stopReceive)
{
break; //如果停止了就直接退出
}
if (isHalfDuplex) //如果是开启了半双工，一问一答
{
while (spCom.BytesToWrite > 0)
{
System.Threading.Thread.Sleep(2);
}
}
if (spCom.BytesToRead > 0)
{
isRead = false;
tmpbuff = new byte[spCom.BytesToRead]; //创建一个长度大小为缓冲区等待接收数据长度的数组
spCom.Read(tmpbuff, 0, tmpbuff.Length); //读取Buff
tmpList.AddRange(tmpbuff); //将读出来的数据放到一个字节列表中，方便操作和转换追加
if (frameAnalysis != null)
{
int vstart, vlen;
if (frameAnalysis.FrameAnalysis(tmpList.ToArray(), out vstart, out vlen))
{
mre.Set(); //线程标志可被终止
try
{
if (callback != null)
{
if (!isHalfDuplex) //如果是全双工方式，则使用新线程去调用回调函数
{
Action <object> threadmethod = delegate(object obj)
{
byte[] bytarr = (byte[])obj;
callback(bytarr);
};
System.Threading.ThreadPool.QueueUserWorkItem(new System.Threading.WaitCallback(threadmethod), tmpList.GetRange(vstart, vlen).ToArray());
}
else
{
callback(tmpList.GetRange(vstart, vlen).ToArray());
}
}
else
{
lock (ThreadreadQueueObj)
{
readQueueBuff.Enqueue(tmpList.GetRange(vstart, vlen).ToArray()); //在返回队列中插入一帧
}
}
}
catch
{
throw new Exception("拆帧接口长度参数返回下标越界...");
}
tmpList.RemoveRange(9, vstart + vlen);
isRead = true;
}
}
dt1 = DateTime.Now; //重置计时器
}
}
mre.Set(); //线程标志可被终止
if (tmpList.Count > 0 && !isRead)
{
if (callback != null)
{
if (!isHalfDuplex) //如果是全双工方式，则使用新线程去调用回调函数
{
Action <object> threadmethod = delegate(object obj)
{
byte[] bytarr = (byte[])obj;
callback(bytarr);
};
System.Threading.ThreadPool.QueueUserWorkItem(new System.Threading.WaitCallback(threadmethod), tmpList.ToArray());
}
else
{
callback(tmpList.ToArray());
}
}
else
{
lock (ThreadreadQueueObj)
{
readQueueBuff.Enqueue(tmpList.ToArray());
}
}
tmpList.Clear();
}
//}
}
}