VC ++ / CLI和串行端口 [英] VC++/CLI and Serial Port

问题描述

我的代码工作得非常好，除非我认为它不是最佳的，并且能够可靠地快速响应或处理有意义的延迟。



有没有更好的方法吗？我希望它只是等待缓冲区中前8字节数据的到达并读取并继续下一个任务？

睡眠（ 2000 ）;  //  延迟 
 serialPort1-> ;; DiscardInBuffer（）;  //  清除缓冲区中的串行端口 
 serialPort1-> ;; DiscardOutBuffer（）;  //   clear serial port out buffer  
 
  auto  Power =  gcnew  array< System :: Byte> {0x52,0x0C，0x01,0x00,0x00}; 
 serialPort1->写入（电源， 0 ，电源 - >长度）; 
 
 
睡眠（ 500 ）; 
  auto  Power1 =  gcnew 数组< System :: Byte> {0x00,0x00,0x00,0x00,0x00}; 
 serialPort1-> Read（Power1， 0 ，Power1-> ;; Length）; 
 
 字符串 ^ str2 = 字符串 ::格式（  {0：X2} {1：X2} {2：X2} {3：X2} {4：X2} ，Power1 [ 0 ]，Power1 [ 1 ]，Power1 [ 2 ]，Power1 [ 3 ]，Power1 [ 4 ]）; 
 
 字符串 ^ str3 = 字符串 ::格式（  {2：N0}，Power1 [ 0 ]， Power1 [ 1 ]）; 
 
 richTextBox1-& gt; Text + =   Power Level  - >; 
 richTextBox1-& gt; Text + = str3 +   Watts   \\\\ n; 
 

解决方案

更好的方法是用户重叠通信，因为睡眠会阻塞线程。



在本文中： Windows中的串行通信是很好地解释了。



为端口创建写入和读取线程也很有意义。



文章，其中包含背景信息，但在C＃中。

你应该摆脱所有的 Sleep 调用并与串口异步工作：编写你的数据，然后处理 DataReceived 事件，由 SerialPort 类轻轻提供（参见 SerialPort :: DataReceived Event [ ^ ]）。

My code is working perfectly fine except I don't believe it is optimal and is going work reliably for fast response or handle significan delays.

Is there a better way of doing this? I would like it to just only wait for the arrival of the first 8 byte data on the buffer and read and continue on to the next task?

Sleep (2000);                           //delay
serialPort1->;DiscardInBuffer();        //clear serial port in buffer
serialPort1->;DiscardOutBuffer();       //clear serial port out buffer

auto Power = gcnew array<System::Byte> {0x52, 0x0C, 0x01, 0x00, 0x00};
serialPort1->Write(Power, 0, Power->Length);


Sleep(500);
auto Power1 = gcnew array<System::Byte> {0x00, 0x00, 0x00, 0x00, 0x00};
serialPort1->Read(Power1, 0, Power1->;Length);

String^ str2 = String::Format("{0:X2} {1:X2} {2:X2} {3:X2} {4:X2}", Power1[0], Power1[1], Power1[2], Power1[3], Power1[4]);

String^ str3 = String::Format("{2:N0}", Power1[0], Power1[1]);

richTextBox1-&gt;Text += "Power Level     ->   ";
richTextBox1-&gt;Text += str3 + "Watts" "\r\n";

解决方案

A better way is to user overlapped communication, because sleep blocks the thread.

In this articel: Serial Communication in Windows is it well explained.

It makes also sense to create a write and a read thread for the port.

An article with background information but in C#.

You should get rid of all the Sleep calls and work asynchronously with the serial port: write your data and then and then handle the DataReceived event, gently provided by the SerialPort class (see SerialPort::DataReceived Event[^]).

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