c++ - 没有得到正确的功能报告

Question

我之前问过类似的问题，但是 1. 没有人回答 2. 有点不同。我设法获得了正确的文件路径并使用 CreateFile 创建了一个处理程序。然后我尝试使用 HidD_GetFeature() 函数，但是当我打印出报告时，它全是符号 - 而不是字母、数字或可读符号。有谁知道为什么要这样做？？这是我的代码:

/*****************************Mainframe.cpp**************************************/
#include"DeviceManager.h"

int main()
{
    int iQuit;
    DeviceManager deviceManager;

    //deviceManager.ListAllDevices();
    deviceManager.GetDevice("8888", "0308");

    std::cin >> iQuit;

    return 0;
}

/***********************************DeviceManager.h***************************/
#include <windows.h>
//#include <hidsdi.h>
#include <setupapi.h>
#include <iostream>
#include <cfgmgr32.h>
#include <tchar.h>
#include <devpkey.h>

extern "C"{
    #include <hidsdi.h>
}

//#pragma comment (lib, "setupapi.lib")

class DeviceManager
{
public:
    DeviceManager();
    ~DeviceManager();

    void ListAllDevices();
    void GetDevice(std::string vid, std::string pid);

    HANDLE PSMove;
    byte reportBuffer[57];
    GUID guid;
private:
    HDEVINFO deviceInfoSet;             //A list of all the devices
    SP_DEVINFO_DATA deviceInfoData;     //A device from deviceInfoSet

    SP_DEVICE_INTERFACE_DATA deviceInterfaceData;
    SP_DEVICE_INTERFACE_DETAIL_DATA deviceInterfaceDetailedData;

};

/********************************DeviceManager.cpp*********************************/
#include"DeviceManager.h"

DeviceManager::DeviceManager()
{
    HidD_GetHidGuid(&guid);
    deviceInfoSet = SetupDiGetClassDevs(&guid, NULL, NULL, DIGCF_PRESENT|DIGCF_DEVICEINTERFACE); //Gets all Devices
}

DeviceManager::~DeviceManager()
{
}

void DeviceManager::ListAllDevices()
{
    DWORD deviceIndex = 0;

    deviceInfoData.cbSize = sizeof(deviceInfoData);

    while(SetupDiEnumDeviceInfo(deviceInfoSet, deviceIndex, &deviceInfoData))
    {
        deviceInfoData.cbSize = sizeof(deviceInfoData);

        ULONG tcharSize;
        CM_Get_Device_ID_Size(&tcharSize, deviceInfoData.DevInst, 0);
        TCHAR* deviceIDBuffer = new TCHAR[tcharSize];   //the device ID will be stored in this array, so the tcharSize needs to be big enough to hold all the info.
                                                        //Or we can use MAX_DEVICE_ID_LEN, which is 200

        CM_Get_Device_ID(deviceInfoData.DevInst, deviceIDBuffer, MAX_PATH, 0); //gets the devices ID - a long string that looks like a file path.

        /*
        //SetupDiGetDevicePropertyKeys(deviceInfoSet, &deviceInfoData, &devicePropertyKey, NULL, 0, 0);
        if( deviceIDBuffer[8]=='8' && deviceIDBuffer[9]=='8' && deviceIDBuffer[10]=='8' && deviceIDBuffer[11]=='8' && //VID
            deviceIDBuffer[17]=='0' && deviceIDBuffer[18]=='3' && deviceIDBuffer[19]=='0' && deviceIDBuffer[20]=='8') //PID
        {
            std::cout << deviceIDBuffer << "\t<-- Playstation Move" << std::endl;
        }
        else
        {
            std::cout << deviceIDBuffer << std::endl;
        }*/

        std::cout << deviceIDBuffer << std::endl;

        deviceIndex++;
    }
}

void DeviceManager::GetDevice(std::string vid, std::string pid)
{
    DWORD deviceIndex = 0;
    deviceInfoData.cbSize = sizeof(deviceInfoData);

    while(SetupDiEnumDeviceInfo(deviceInfoSet, deviceIndex, &deviceInfoData))
    {
        deviceInfoData.cbSize = sizeof(deviceInfoData);

        ULONG IDSize;
        CM_Get_Device_ID_Size(&IDSize, deviceInfoData.DevInst, 0);

        TCHAR* deviceID = new TCHAR[IDSize];

        CM_Get_Device_ID(deviceInfoData.DevInst, deviceID, MAX_PATH, 0);

        if( deviceID[8]==vid.at(0) && deviceID[9]==vid.at(1) && deviceID[10]==vid.at(2) && deviceID[11]==vid.at(3) && //VID
            deviceID[17]==pid.at(0) && deviceID[18]==pid.at(1) && deviceID[19]==pid.at(2) && deviceID[20]==pid.at(3)) //PID
        {
            DWORD deviceInterfaceIndex = 0;
            deviceInterfaceData.cbSize = sizeof(deviceInterfaceData);

            //HDEVINFO deviceInterfaceSet = SetupDiGetClassDevs(&guid, NULL, NULL, DIGCF_DEVICEINTERFACE);

            if(SetupDiEnumDeviceInterfaces(deviceInfoSet, &deviceInfoData, &guid, deviceInterfaceIndex, &deviceInterfaceData))
            {
                deviceInterfaceData.cbSize = sizeof(deviceInterfaceData);
                deviceInterfaceDetailedData.cbSize = sizeof(deviceInterfaceDetailedData);

                DWORD requiredSize;

                SetupDiGetDeviceInterfaceDetail(deviceInfoSet, &deviceInterfaceData, NULL, 0, &requiredSize, &deviceInfoData); //Gets the size
                SetupDiGetDeviceInterfaceDetail(deviceInfoSet, &deviceInterfaceData, &deviceInterfaceDetailedData, requiredSize, NULL, NULL); //Sets the deviceInterfaceDetailedData

                //std::cout << deviceInterfaceDetailedData.DevicePath << std::endl;

                PSMove = CreateFile(deviceInterfaceDetailedData.DevicePath, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);

                reportBuffer[0] = 0;
                ULONG reportBufferLength = sizeof(reportBuffer);
                HidD_GetFeature(PSMove, &reportBuffer, reportBufferLength);
                std::cout << reportBuffer << std::endl;
                //deviceInterfaceIndex++;
            }
            break;
        }

        deviceIndex++;
    }
}

HidD_GetFeature() 函数位于这一巨大代码块的底部。

更新:我现在已经设法打印了报告，但它只是一个随机的 8 位十六进制。每次我关闭程序并再次运行时，它都会打印出不同的结果。这是为什么？

Answer 1

ListAllDevices() 函数未正确显示信息，因为您正在将 wchar_t* 输出到 std::cout。您需要对宽字符使用 std::wcout。