怎么样检测主板是否支持usb2.0?

Question

用程序说明，谢谢！

Answer 1

// 原理：USB2.0的主机控制器类型是EHCI,PCI设备ID是PCI\CC_0C0320，因此只要找到这个设备ID就可以认为主板支持USB2.0#include <windows.h>
#include <setupapi.h>
#include <stdio.h>#pragma comment(lib, "setupapi.lib")int main(int argc, char* argv[])
{
    HDEVINFO DeviceInfoSet;
    SP_DEVINFO_DATA DeviceInfoData;
    DWORD i,err; BOOL bFind = FALSE;// char* CompatibleID = argv[1];
char* CompatibleID = "PCI\\CC_0C0320";    DeviceInfoSet = SetupDiGetClassDevs(NULL, // All Classes
        0,
        0, 
        DIGCF_ALLCLASSES | DIGCF_PRESENT ); // All devices present on system    if (DeviceInfoSet == INVALID_HANDLE_VALUE) {
printf("GetClassDevs(All Present Devices fail");
        return 1;
    } DeviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA);    for (i=0;SetupDiEnumDeviceInfo(DeviceInfoSet,i,&DeviceInfoData);i++) {
        DWORD DataT;
        LPTSTR p,buffer = NULL;
        DWORD buffersize = 0;
        
        while (!SetupDiGetDeviceRegistryProperty(
            DeviceInfoSet,
            &DeviceInfoData,
            SPDRP_COMPATIBLEIDS,
            &DataT,
            (PBYTE)buffer,
            buffersize,
            &buffersize))
        {
            if (GetLastError() == ERROR_INVALID_DATA) {
                break;
            }
            else if (GetLastError() == ERROR_INSUFFICIENT_BUFFER) {
                if (buffer) 
                    LocalFree(buffer); buffersize *= 2;
                buffer = LocalAlloc(LPTR,buffersize);
            }
            else {
                printf("GetDeviceRegistryProperty fail");
                goto cleanup_DeviceInfo;
            }            
        }        if (GetLastError() == ERROR_INVALID_DATA) 
            continue;
        
       for (p=buffer;*p&&(p<&buffer[buffersize]);p+=lstrlen(p)+sizeof(TCHAR))
        {
//            printf(TEXT("Compare device ID: [%s]\n"),p);            if (!stricmp(CompatibleID,p))
            {
               printf(TEXT("Found! [%s]\n"),p);    bFind = TRUE;               break;
            }
        }        if (buffer) LocalFree(buffer); if (bFind) {
break;
}
    }    if ((GetLastError()!=NO_ERROR)&&(GetLastError()!=ERROR_NO_MORE_ITEMS))
    {
        printf("EnumDeviceInfo fail");
    }
    
    //
    //  Cleanup.
    //    
cleanup_DeviceInfo:
    err = GetLastError();
SetupDiDeleteDeviceInfo(DeviceInfoSet, &DeviceInfoData); return err;
}