串口注册表的自动识别

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Windows串口注册表的自动识别：

打开Windows注册表的方法：

在运行输入“regedit”打开注册表

struct UartInfo{DWORD UartNum;char UartName[20];};//获取串口列表BOOL EnumComs(struct UartInfo **UartCom, LPDWORD UartComNumber){//LPCTSTR 即const char * *UartComNumber = 0;const char subKey[100] = "HARDWARE\\DEVICEMAP\\SERIALCOMM";HKEY hNewKey;LONG lResult=RegOpenKeyEx( HKEY_LOCAL_MACHINE, subKey, 0, KEY_ALL_ACCESS, &hNewKey);   if(lResult != ERROR_SUCCESS)  {   PrintLog("打开COM注册表失败！！！");return FALSE;   }else{PrintLog("打开COM注册表成功！！！");}//DWORD即unsigned longDWORD ValuesNumber;DWORD MaxValueNameLen;DWORD MaxValueLen;CString str;//检索指定的子键下有多少个值项 lResult = RegQueryInfoKey(  hNewKey,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  &ValuesNumber,  &MaxValueNameLen,  &MaxValueLen,  NULL,  NULL); if(lResult != ERROR_SUCCESS) { RegCloseKey(hNewKey); PrintLog("检索连接在PC上的串口数量失败！！！"); return FALSE; } else { str.Format("连接在PC上的串口数量是：%ld", ValuesNumber); PrintLog(str);*UartCom =(struct UartInfo *)malloc( ValuesNumber * sizeof(struct UartInfo));  } DWORD index; DWORD uartindex = 0; //CHAR  ValueName[MAX_VALUE_NAME];  CHAR  ValueName[100];  //DWORD ValueNameSize = MAX_VALUE_NAME; DWORD ValueNameSize; DWORD DataType; BYTE DataBuffer[100] = ""; DWORD DataLen = 100; //LPTSTR 即 char *, LPBYTE即 char * //检索每个值项，获取值名，数据类型，数据 for(index = 0; index < ValuesNumber; index++) { memset(ValueName, 0, sizeof(ValueName)); memset(DataBuffer, 0, sizeof(DataBuffer)); ValueNameSize = 100; DataLen = 100; lResult = RegEnumValue(hNewKey,index,ValueName,&ValueNameSize,NULL, &DataType, DataBuffer, &DataLen); if (lResult == ERROR_SUCCESS )  { switch(DataType) { case REG_NONE: // No value type(0) //PrintLog("DataType: REG_NONE"); break; case REG_SZ://Unicode nul terminated string (1)  //PrintLog("DataType: REG_SZ");break; case REG_EXPAND_SZ:// Unicode nul terminated string (2)  //PrintLog("DataType: REG_EXPAND_SZ"); break; case REG_BINARY:// Free form binary (3)  //PrintLog("DataType: REG_BINARY"); break; case REG_DWORD:// 32-bit number(4) //PrintLog("DataType: REG_DWORD"); break; case REG_MULTI_SZ: // Multiple Unicode strings(7) //PrintLog("DataType: REG_MULTI_SZ"); break; default: //PrintLog("Other DataType!!!"); break; }#if 0 str.Format("值名：%s", ValueName); PrintLog(str); str.Format("值名长度：%ld", ValueNameSize); PrintLog(str); str.Format("数据：%s", DataBuffer); PrintLog(str); str.Format("数据长度：%ld", DataLen); PrintLog(str);#endif memcpy((*UartCom)[uartindex].UartName, DataBuffer, DataLen); (*UartCom)[uartindex].UartNum = ValuesNumber; uartindex++; } else if(lResult == ERROR_NO_MORE_ITEMS) { PrintLog("检索串口完毕！！！"); } else { DWORD dw = GetLastError(); str.Format("检索串口出错: 0x%08x", dw); PrintLog(str); return FALSE; } } *UartComNumber = uartindex; return TRUE;}

在主函数中调用的代码：

<span style="white-space:pre"></span>DWORD UartComNumber = 0;struct UartInfo *pUartCom;BOOL bResult;bResult = EnumComs(&pUartCom, &UartComNumber);DWORD index;if(bResult){PrintLog("获取串口列表成功");}else{PrintLog("获取串口列表失败");}for( index= 0;index < UartComNumber; index++) {  pCDlg->m_ComboBox.AddString(pUartCom[index].UartName);}if(pUartCom != NULL){free(pUartCom);pUartCom = NULL;}ResetEvent(g_UartEvent);g_UartEvent = CreateEvent( NULL, TRUE, TRUE, NULL);<span style="white-space:pre"></span>//用于异步读写的事件句柄

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