在C＃中的串行端口读取 [英] Reading from the serial port in C#

问题描述

我一直在使用的Readline（）和数据试过被丢弃，我尝试使用阅读（），但我不知道如何有这样做的一个错误的证明方法，因为我可能会得到几个包一个接一个，我没有明知有将是未来另一个数据包的方式，在数据包之间BytesToRead为0，所以我不能使用它。读取数据到缓冲区时，你有一个计时器或将线程睡眠，以便所有到达包？

I have tried using Readline() and data gets dropped, I tried using Read() but I am not sure how to have an error proof method of doing it, since I may get several packets one after another and I have no way of knowing that there is going to be another packet coming in. In between packets BytesToRead is 0, so I can't use it. When reading data to the buffer to you have a timer or put the thread to sleep to allow for all the packets to arrive?

我迷路了。不知道下一个尝试的东西。

I am lost. Don't know what to try next.

我要指出，我没有得到任何保证，串脱落串口将\\\
或者终止\ R或\r\\\
。我只是需要一个傻瓜证明方法读取ALL当用户按下它打印将来自规模分组

I should mention that I get no guarantee that the string coming off the serial port will be ended with \n or \r or \r\n. I simply need a fool proof way to read ALL the packets that will come from the scale when the user presses PRINT on it.

有人回答这里我喜欢这个主意。 - 等待所有分组的一定量的时间，但它们擦除他们的答案。任何机会，你可以重新邮递

Someone answered here with the idea I liked - waiting for a certain amount of time for all the packets, but they erased their answer. ANy chance you could re-post it?

推荐答案

您是否尝试过听的 DataRecieved 中的事件= http://msdn.microsoft.com/en-us/library/system.io.ports.serialport.aspx> 的SerialPort 类？

Have you tried listening to the DataRecieved event of the SerialPort class?

public class MySerialReader : IDisposable
{
	private SerialPort serialPort;
	private Queue<byte> recievedData = new Queue<byte>();

	public MySerialReader()
	{
		serialPort = new SerialPort();
		serialPort.Open();

		serialPort.DataReceived += serialPort_DataReceived;
	}

	void serialPort_DataReceived(object s, SerialDataReceivedEventArgs e)
	{
		byte[] data = new byte[serialPort.BytesToRead];
		serialPort.Read(data, 0, data.Length);

		data.ToList().ForEach(b => recievedData.Enqueue(b));

		processData();
	}

	void processData()
	{
		// Determine if we have a "packet" in the queue
		if (recievedData.Count > 50)
		{
			var packet = Enumerable.Range(0, 50).Select(i => recievedData.Dequeue());
		}
	}

	public void Dispose()
	{
		if (serialPort != null)
			serialPort.Dispose();
	}

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