/// <summary>
/// 入队一条指令
/// </summary>
/// <param name="allowDiscard">是否允许丢弃该指令</param>
/// <param name="cmdEventHandler">串口指令事件处理器</param>
/// <param name="sendCMDTimeout">发送指令超时时长（毫秒）</param>
/// <param name="reciveDataTimeout">接收数据超时时长（毫秒）</param>
/// <param name="cmd">指令</param>
public void EnqueueBytes(Boolean allowDiscard, SerialPortCMDEventHandler cmdEventHandler, int sendCMDTimeout, int reciveDataTimeout, byte[] cmd)
{
if (!useCMDQueue)
{
System.Console.WriteLine("不使用队列的串口设备不能调用此方法");
return;
}
CMDQueue.Enqueue(allowDiscard, cmdEventHandler, sendCMDTimeout, reciveDataTimeout, cmd);
}
/// <summary>
/// 关闭串口
/// </summary>
internal void Close()
{
IsClosed = true;
if (OpenStatusListenerTimer != null)
{
try
{
OpenStatusListenerTimer.Dispose();
}
catch (Exception ex)
{
System.Console.Write(ex);
OpenStatusListenerTimer = null;
}
}
if (AfterOpenEventHandlerListenerTimer != null)
{
try
{
AfterOpenEventHandlerListenerTimer.Dispose();
}
catch (Exception ex)
{
System.Console.Write(ex);
AfterOpenEventHandlerListenerTimer = null;
}
}
if (CMDQueue != null)
{
try
{
CMDQueue.Dispose();
}
catch (Exception ex)
{
System.Console.Write(ex);
CMDQueue = null;
}
}
if (serialPort == null)
{
return;
}
try
{
serialPort.Close();// 尝试关闭
}
catch (Exception ex)
{
System.Console.Write(ex);
serialPort = null;
}
}
private int byteLength = 0; // 部分响应信息字节长度
/// <summary>
/// 开始打开串口
/// </summary>
/// <param name="SerialDataReceivedEventHandlerX">串口数据接收事件处理器扩展</param>
/// <param name="BeforeOpen">尝试打开串口前操作</param>
/// <param name="OpenSuccess">尝试打开串口成功操作</param>
/// <param name="OpenError">尝试打开串口失败操作</param>
/// <param name="StillOpen">仍处于打开状态操作</param>
/// <param name="Disconnect">已经断开操作</param>
/// <param name="BeforeReOpen">尝试重新打开串口前操作</param>
/// <param name="ReOpenSuccess">尝试重新打开串口成功操作</param>
/// <param name="ReOpenError">尝试重新打开串口失败操作</param>
/// <param name="AfterOpen">串口打开后操作</param>
internal void Start(
SerialDataReceivedEventHandlerX SerialDataReceivedEventHandlerX,
BeforeOpen BeforeOpen,
OpenSuccess OpenSuccess,
OpenError OpenError,
StillOpen StillOpen,
Disconnect Disconnect,
BeforeReOpen BeforeReOpen,
ReOpenSuccess ReOpenSuccess,
ReOpenError ReOpenError,
AfterOpen AfterOpen
)
{
// 设置串口数据接收事件处理器
serialPort.DataReceived += new System.IO.Ports.SerialDataReceivedEventHandler((sender, e) =>
{
if (IsClosed)
{
return;
}
byte[] readedBytes = new byte[serialPort.BytesToRead];
int byteLength = readedBytes.Length;
if (byteLength == 0)
{
CMDQueue.CancelCurrentCMD();
return;
}
serialPort.Read(readedBytes, 0, byteLength);
String hexString = HexUtils.BytesToHexString(readedBytes, true).Trim();
if ("".Equals(hexString))
{
CMDQueue.CancelCurrentCMD();
return;
}
if (ModbusUtils.IsFullCmd(hexString))
{
if (useCMDQueue)
{
CMDQueue.FinishCurrentCMD(hexString);
}
SerialDataReceivedEventHandlerX?.Invoke(this.sid, this.portName, hexString);
this.hexString = "";
this.byteLength = 0;
}
else
{
this.hexString += " " + hexString;
this.hexString = this.hexString.Trim();
this.byteLength += byteLength;
if (ModbusUtils.IsFullCmd(this.hexString))
{
if (useCMDQueue)
{
CMDQueue.FinishCurrentCMD(hexString);
}
SerialDataReceivedEventHandlerX?.Invoke(this.sid, this.portName, this.hexString);
this.hexString = "";
this.byteLength = 0;
}
}
});
// 每100毫秒执行一次指令队列
if (useCMDQueue)
{
CMDQueue = new SerialPortCMDQueue(this.sid, this.portName, serialPort);
CMDQueue.Start();
}
BeforeOpen?.Invoke(this.sid, this.portName); // 尝试打开串口前操作
if (this.Open()) // 尝试打开串口
{
OpenSuccess?.Invoke(this.sid, this.portName); // 尝试打开串口成功操作
OpenStatus = true;
if (AfterOpen != null)
{
AfterOpenEventHandlerListenerTimer = new Timer((obj) =>
{
AfterOpen(this.sid, this.portName);// 串口打开后操作
}, null, 0, this.afterOpenEventHandlerPeriod);
}
}
else
{
OpenError?.Invoke(this.sid, this.portName);// 尝试打开串口失败操作
OpenStatus = null;
if (AfterOpen != null)
{
AfterOpenEventHandlerListenerTimer = new Timer((obj) =>
{
if (IsClosed)
{
return;
}
AfterOpen(this.sid, this.portName);// 串口打开后操作
}, null, Timeout.Infinite, Timeout.Infinite);
}
}
// 无论打开成功与否，后续都需要监听该串口是否处于打开状态。
OpenStatusListenerTimer = new Timer((o) =>
{
if (IsClosed)
{
return;
}
switch (OpenStatus) // 上一次的串口打开状态
{
case null: // 首次打开串口失败
case false: // 后续打开串口失败
{
BeforeReOpen?.Invoke(this.sid, this.portName); // 尝试重新打开串口前操作
if (this.Open()) // 尝试重新打开串口
{
ReOpenSuccess?.Invoke(this.sid, this.portName); // 尝试重新打开串口成功操作
OpenStatus = true;
if (AfterOpen != null)
{
AfterOpenEventHandlerListenerTimer.Change(0, this.afterOpenEventHandlerPeriod); // 重新开启计时器
}
}
else
{
ReOpenError?.Invoke(this.sid, this.portName); // 尝试重新打开串口失败
OpenStatus = false;
}
}
break;
case true: // 首次或后续打开串口成功
{
if (serialPort.IsOpen) // 仍处于打开状态
{
StillOpen?.Invoke(this.sid, this.portName); // 仍处于打开状态操作
OpenStatus = true;
}
else // 已经断开
{
Disconnect?.Invoke(this.sid, this.portName); // 已经断开操作
OpenStatus = false;
if (AfterOpen != null)
{
AfterOpenEventHandlerListenerTimer.Change(Timeout.Infinite, Timeout.Infinite); // 暂停计时器
}
}
}
break;
}
}, null, this.checkOpenStatusPeriod, this.checkOpenStatusPeriod);
}
