c++检测所有com口并获取外设在那个串口上使用
时间: 2024-05-04 16:21:33 浏览: 24
在C++中,可以使用Windows API函数来枚举所有COM端口并检测外设所在的端口。下面是一个示例代码:
```c++
#include <windows.h>
#include <setupapi.h>
#include <devguid.h>
#include <regstr.h>
#include <iostream>
using namespace std;
void GetComPorts()
{
HDEVINFO device_info_set = SetupDiGetClassDevs(&GUID_DEVCLASS_PORTS, NULL, NULL, DIGCF_PRESENT);
if (device_info_set == INVALID_HANDLE_VALUE)
{
cout << "Failed to get device info set. Error code: " << GetLastError() << endl;
return;
}
SP_DEVINFO_DATA device_info_data;
ZeroMemory(&device_info_data, sizeof(SP_DEVINFO_DATA));
device_info_data.cbSize = sizeof(SP_DEVINFO_DATA);
for (DWORD i = 0; SetupDiEnumDeviceInfo(device_info_set, i, &device_info_data); i++)
{
HKEY hkey = SetupDiOpenDevRegKey(device_info_set, &device_info_data, DICS_FLAG_GLOBAL, 0, DIREG_DEV, KEY_READ);
if (hkey == INVALID_HANDLE_VALUE)
{
cout << "Failed to open registry key. Error code: " << GetLastError() << endl;
continue;
}
TCHAR port_name[MAX_PATH];
DWORD size = sizeof(port_name);
if (RegQueryValueEx(hkey, TEXT("PortName"), NULL, NULL, (LPBYTE)port_name, &size) != ERROR_SUCCESS)
{
cout << "Failed to get port name. Error code: " << GetLastError() << endl;
RegCloseKey(hkey);
continue;
}
cout << "COM" << port_name << " detected." << endl;
// TODO: Check if the device is connected to this COM port
RegCloseKey(hkey);
}
SetupDiDestroyDeviceInfoList(device_info_set);
}
int main()
{
GetComPorts();
return 0;
}
```
使用上述代码,可以枚举所有的COM端口,然后获取每个端口对应的注册表键值,即可得到COM口名称。接着,可以通过检测外设所在的COM口与枚举到的COM口进行比较,以获取外设在哪个串口上使用。
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