之前在本板块发过一个关于CSerialPort 求助，最近有坛友询问关于这方面的问题。
也是为了给更多人提供帮助，把我目前调试过的东西跟大家分享一下。
PS，我也是个上位机菜鸟，希望大家多给建议。
http://blog.sina.com.cn/s/blog_6ca5ea9f0101fdv1.html，我是参照这个里面的内容写的。内容很详细，我就不再赘述了。
其中要注意：
1.将OnComm()函数中的
safearray_inp=variant_inp; //VARIANT型变量转换为ColeSafeArray型变量
改为 safearray_inp.Attach(variant_inp);
如果不改的话，会有内存泄露。
2.在一次接收事件结束后，要清缓存。
调用 m_MSComm.put_InBufferCount(0);
如果需要自动寻找串口号，可添加下面2个函数，也是网上别人写的，我稍微改了一下，自己测过可以用。
[C++] 纯文本查看 复制代码
int m_nComArray[20];/////查询注册表的串口号，将值存于数组中///本代码参考于mingojiang的获取串口逻辑名代码//void CxDlg::QueryKey(HKEY hKey) { #define MAX_KEY_LENGTH 255#define MAX_VALUE_NAME 16383//TCHAR achKey[MAX_KEY_LENGTH]; // buffer for subkey name//DWORD cbName; // size of name string TCHAR achClass[MAX_PATH] = TEXT(""); // buffer for class name DWORD cchClassName = MAX_PATH; // size of class string DWORD cSubKeys=0; // number of subkeys DWORD cbMaxSubKey; // longest subkey size DWORD cchMaxClass; // longest class string DWORD cValues; // number of values for key DWORD cchMaxValue; // longest value name DWORD cbMaxValueData; // longest value data DWORD cbSecurityDescriptor; // size of security descriptor FILEtiME ftLastWriteTime; // last write time DWORD i, retCode; TCHAR achValue[MAX_VALUE_NAME]; DWORD cchValue = MAX_VALUE_NAME; // Get the class name and the value count. retCode = RegQueryInfoKey(hKey, // key handle achClass, // buffer for class name &cchClassName, // size of class string NULL, // reserved &cSubKeys, // number of subkeys &cbMaxSubKey, // longest subkey size &cchMaxClass, // longest class string &cValues, // number of values for this key &cchMaxValue, // longest value name &cbMaxValueData, // longest value data &cbSecurityDescriptor, // security descriptor &ftLastWriteTime); // last write time for (i=0;i<20;i++)///存放串口号的数组初始化{m_nComArray = -1;}// Enumerate the key values. if (cValues > 0) {for (i=0, retCode=ERROR_SUCCESS; i 1){int temp;for (x = 0; x < i - 1; x++){for (y = 0; y < i - 1 - x; y++){if(m_nComArray[y] > m_nComArray[y + 1]){temp = m_nComArray[y];m_nComArray[y] = m_nComArray[y + 1];m_nComArray[y + 1] = temp;}}}}i = 0;while(i < MaxSerialPortNum && -1 != m_nComArray){CString szCom; szCom.Format(_T("COM%d"), m_nComArray);m_PortNO.InsertString(i, szCom.GetBuffer(5));++i;Flag = TRUE;}if (Flag)///把第一个发现的串口设为下拉列表的默认值m_PortNO.SetCurSel(0);}
由于现在有很多系统没有自带的Mscomm32.ocx的控件，需要注册，我自己写了一个简单的注册（其实就是复制）。
RegisterMSComm32.cpp文件
[C++] 纯文本查看 复制代码
#include "stdafx.h"#include "RegisterMSComm32.h"CRegisterMSComm32::CRegisterMSComm32(void){}CRegisterMSComm32::~CRegisterMSComm32(void){}//注册控件 修改注册表BOOL CRegisterMSComm32::RegisterMSComm32(void) {HKEY key;if(ERROR_SUCCESS != RegOpenKeyEx(HKEY_VALUE,KEYROAD_FIRST,0,KEY_ALL_ACCESS,&key)) //打开失败 就创建 一级目录是否存在{if (ERROR_SUCCESS != RegCreateKey(HKEY_VALUE,KEYROAD_FIRST,&key)) //创建{::RegCloseKey(key); //失败就退出return FALSE;}}if(ERROR_SUCCESS != RegOpenKeyEx(HKEY_VALUE,KEYROAD,0,KEY_ALL_ACCESS,&key)){if (ERROR_SUCCESS != RegCreateKey(HKEY_VALUE,KEYROAD,&key)) //创建{::RegCloseKey(key);return FALSE;}}char *szValueName=""; //修改默认键值 char *szValueDate=KEYVALUE; UINT cbLen=strlen(szValueDate); if(ERROR_SUCCESS != RegSetValueExA(key,szValueName,0,REG_SZ,(const unsigned char *)szValueDate,cbLen)){::RegCloseKey(key);return FALSE;}::RegCloseKey(key);return TRUE;}///目录是否存在的检查：BOOL CRegisterMSComm32::CheckFolderExist(CString const& strPath){ //判断是否存在if(!PathFileExists(strPath))return false;//判断是否为目录DWORD attributes = ::GetFileAttributes(strPath); attributes &= FILE_ATTRIBUTE_DIRECTORY;return attributes == FILE_ATTRIBUTE_DIRECTORY;}//复制文件void CRegisterMSComm32::MyCFileCopy(CString const& CopyFromFile,CString const& CopyToFile){//以只读|二进制的方式打开第一个文件CFile hFile;int len;hFile.Open(CopyFromFile,CFile::modeRead|CFile::typeBinary,0);len = int(hFile.GetLength()); //分配缓冲区char *buf;buf = new char[len+1]; hFile.Read(buf,len); //读文件hFile.Close(); //--------------------------------------------if(hFile.Open(CopyToFile,CFile::modeRead|CFile::typeBinary,0)) //打开成功{hFile.Close(); delete[] buf; //释放缓冲区return;}//只写|二进制|创建的方式打开第二个文件hFile.Open(CopyToFile,CFile::modeWrite|CFile::typeBinary|CFile::modeCreate,0); hFile.Write(buf,len); //写文件hFile.Close(); delete[] buf; //释放缓冲区}void CRegisterMSComm32::CallCmd(void) //调用cmd.exe{//ShellExecute(NULL,"open","C:\Windows\System32\cmd.exe","regsvr32 mscomm32.ocx",NULL,SW_MAXIMIZE);ShellExecute(NULL,"open","cmd.exe","C:\Windows\System32",NULL,SW_HIDE); /*------------cmd 回显----------*/ SECURITY_ATTRIBUTES sa; HANDLE hRead,hWrite; sa.nLength = sizeof(SECURITY_ATTRIBUTES); sa.lpSecurityDescriptor = NULL; //使用系统默认的安全描述符 sa.bInheritHandle = TRUE; //创建的进程继承句柄 if (!CreatePipe(&hRead,&hWrite,&sa,0)) //创建匿名管道 { AfxMessageBox("CreatePipe Failed!",MB_OK | MB_ICONWARNING); return; } STARTUPINFO si; PROCESS_INFORMATION pi; ZeroMemory(&si,sizeof(STARTUPINFO)); si.cb = sizeof(STARTUPINFO); GetStartupInfo(&si); si.hStdError = hWrite; si.hStdOutput = hWrite; //新创建进程的标准输出连在写管道一端 si.wShowWindow = SW_HIDE; //隐藏窗口 si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES; char cmdline[200]; CString tmp,stredit2; //GetDlgItemText(IDC_EDIT_CMD,stredit2); //获取编辑框中输入的命令行 tmp.Format("cmd /C %s","regsvr32 mscomm32.ocx"); //注册控件 sprintf_s(cmdline,"%s",tmp); if (!CreateProcess(NULL,cmdline,NULL,NULL,TRUE,NULL,NULL,NULL,&si,&pi)) //创建子进程 {AfxMessageBox("CreateProcess Failed!",MB_OK | MB_ICONWARNING); return; } CloseHandle(hWrite); //关闭管道句柄 char buffer[4096] = {0}; CString strOutput; DWORD bytesRead; while (true) {if (ReadFile(hRead,buffer,4095,&bytesRead,NULL) == NULL) //读取管道break; //strOutput += buffer;//SetDlgItemText(IDC_EDIT_OUTPUT,strOutput); //显示输出信息到编辑框,并刷新窗口//UpdateWindow();Sleep(100); } CloseHandle(hRead); system("taskkill -f -im cmd.exe"); //关闭cmd.exe}void CRegisterMSComm32::RegAx(CWnd * cwnd) //注册{CString strRoad,strSysRoad;TCHAR szFilePath[MAX_PATH + 1]; GetModuleFileName(NULL, szFilePath, MAX_PATH); //获得exe执行文件所在路径(_tcsrchr(szFilePath, _T('\')))[1] = 0;strRoad = szFilePath;strRoad = strRoad + "mscomm32.ocx";if(CheckFolderExist(SYSTEM_64BIT_ROAD)) //检测是否是64位系统（sysWOW64文件夹是否存在）{strSysRoad = SYSTEM_64BIT_ROAD;strSysRoad += AX_NAME;MyCFileCopy(strRoad,strSysRoad);}strSysRoad = SYSTEM_32BIT_ROAD;strSysRoad += AX_NAME;MyCFileCopy(strRoad,strSysRoad);if(RegisterMSComm32()) //注册控件成功{CallCmd();AfxMessageBox("请点确定关闭，再重新打开软件。");cwnd->PostMessage(WM_CLOSE,0,0); //关闭窗口}else{AfxMessageBox("控件注册失败,请手动操作。");cwnd->PostMessage(WM_CLOSE,0,0); //关闭窗口}}
RegisterMSComm32.h文件
[C++] 纯文本查看 复制代码
#pragma once#define HKEY_VALUEHKEY_CLASSES_ROOT#define KEYROAD_FIRST"Licenses"//第一层路径#define KEYROAD"Licenses\4250E830-6AC2-11cf-8ADB-00AA00C00905"//全路径#define KEYVALUE"kjljvjjjoquqmjjjvpqqkqmqykypoqjquoun"//键值#define AX_NAME"\mscomm32.ocx"//AX控件名称#define SYSTEM_32BIT_ROAD"C:\Windows\System32"//32位操作系统路径#define SYSTEM_64BIT_ROAD"C:\Windows\sysWOW64"//64位操作系统路径class CRegisterMSComm32{public:CRegisterMSComm32(void);~CRegisterMSComm32(void);void MyCFileCopy(CString const& CopyFromFile,CString const& CopyToFile);BOOL CheckFolderExist(CString const& strPath);BOOL RegisterMSComm32(void);void CallCmd(void);void RegAx(CWnd * cwnd);};
由于是公司的项目，我就不上传工程文件了。抱歉。希望能对大家有帮助。
|
电子发烧友论坛
0
/7 
工商网监
湘ICP备2023018690号
1644
淘帖
84
赞
回复
显身卡
