在读取前等待串口就绪的C#函数
在读取前等待串口就绪的C#函数
提问于 2022-04-05 07:07:26
我有一个系统，我从一个X，Y，Z运动阶段读取串口，这意味着我发送一个信号(通过usb)到一个功能，读取信号，相应地移动步进电机，然后读取下一个步进电机信号等等。目前，这个函数如下所示：
public void SCPort_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
try
{
string sCurString = "";
//Loop to receive the data from serial port
System.Threading.Thread.Sleep(150);
sCurString = SCPort.ReadExisting();
if (sCurString != "")
StrReceiver = sCurString;
if (BlnSet == true)
{
if (StrReceiver.Length == 3)
{
if (StrReceiver.Substring(StrReceiver.Length - 3) == "OK\n")
BlnReadCom = true;
}
else if (StrReceiver.Length == 4)
{
if (StrReceiver.Substring(StrReceiver.Length - 3) == "OK\n" || StrReceiver.Substring(StrReceiver.Length - 4) == "OK\nS")
BlnReadCom = true;
}
else
{
if (StrReceiver.Substring(StrReceiver.Length - 3) == "OK\n" || StrReceiver.Substring(StrReceiver.Length - 4) == "OK\nS" ||
StrReceiver.Substring(StrReceiver.Length - 5) == "ERR1\n" || StrReceiver.Substring(StrReceiver.Length - 5) == "ERR3\n" ||
StrReceiver.Substring(StrReceiver.Length - 5) == "ERR4\n" || StrReceiver.Substring(StrReceiver.Length - 5) == "ERR5\n")
BlnReadCom = true;
}
}
else
{
if (StrReceiver.Substring(StrReceiver.Length - 1, 1) == "\n")
BlnReadCom = true;
}
}
catch (Exception ex)
{
MessageBox.Show("Failed to receive data", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}此函数读取序列化端口SCPort，由Thread.Sleep指示每150 by读取一次。如果我试图更快地读取数据，我就会得到异常(这很可能表明了我的系统的局限性)。很好。但是，这个异常不是立即抛出的，而是偶尔抛出的。我想要做的不是在读取信号之间等待固定的时间，而是每次等待，直到串行口准备就绪，然后读取它。这将加快我的系统速度，因为与其在每次移动之间等待150 as，我可以完全等待系统所需的时间。
问题是:如何在函数中实现此行为？
我没有尝试自己解决这个问题，因为我真的不知道如何解决这个问题。我很乐意在我的函数中实现这一点，但是至少我需要被指向正确的方向。
Stack Overflow用户
发布于 2022-04-05 13:27:24
此函数处理与端口SCPort的连接。
public void ConnectPort(short sPort)
{
if (SCPort.IsOpen == true)
{
ClosePort();
buttonConnectStage.Text = "Connect stage";
}
else if (SCPort.IsOpen == false)
{
SCPort.PortName = comStage.SelectedItem.ToString(); //Set the serial port number
SCPort.BaudRate = 9600; //Set the bit rate
SCPort.DataBits = 8; //Set the data bits
SCPort.StopBits = StopBits.One; //Set the stop bit
SCPort.Parity = Parity.None; //Set the Parity
SCPort.ReadBufferSize = 2048;
SCPort.WriteBufferSize = 1024;
SCPort.DtrEnable = true;
SCPort.Handshake = Handshake.None;
SCPort.ReceivedBytesThreshold = 1;
SCPort.RtsEnable = false;
//This delegate should be a trigger event for fetching data asynchronously, it will be triggered when there is data passed from serial port.
SCPort.DataReceived += new SerialDataReceivedEventHandler(SCPort_DataReceived); //DataReceivedEvent delegate
try
{
SCPort.Open(); //Open serial port
if (SCPort.IsOpen)
{
StrReceiver = "";
BlnBusy = true;
BlnSet = false;
SendCommand("?R\r"); //Connect to the controller
Delay(250);
BlnBusy = false;
if (StrReceiver == "?R\rOK\n")
{
displayValues();
BlnConnect = true; //Connected successfully
ShrPort = sPort; //Setial port number
buttonConnectStage.Text = "Disconnect stage";
SendCommand("V" + sSpeed.ToString() + "\r"); //Set speed
}
else
{
BlnBusy = false;
BlnConnect = false;
buttonConnectStage.Text = "Failed to connect";
MessageBox.Show("Failed to connect", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
return;
}
}
}
catch (Exception ex)
{
}
}
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/71747550
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