各位大侠好！请问有PC访问USB的例程吗？谢谢了！

Question

各位大侠好！请问有PC访问USB的例程吗？谢谢了！

Answer 1

以下代码工作在WIN2000下,这是一个显示系统USB设备的对话框:// USBPortDlg.h : header file
//#if !defined(AFX_USBPORTDLG_H__BDB23C67_FEB7_11D1_B574_93E4F2DCB761__INCLUDED_)
#define AFX_USBPORTDLG_H__BDB23C67_FEB7_11D1_B574_93E4F2DCB761__INCLUDED_#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000/////////////////////////////////////////////////////////////////////////////
// CUSBPortDlg dialogclass CUSBPortDlg : public CDialog
{
// Construction
public:
CUSBPortDlg(CWnd* pParent = NULL); // standard constructor// Dialog Data
//{{AFX_DATA(CUSBPortDlg)
enum { IDD = IDD_USBPORT_DIALOG };
// NOTE: the ClassWizard will add data members here
//}}AFX_DATA // ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CUSBPortDlg)
protected:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support
//}}AFX_VIRTUAL// Implementation
protected:
HICON m_hIcon; // Generated message map functions
//{{AFX_MSG(CUSBPortDlg)
virtual BOOL OnInitDialog();
afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
afx_msg void OnPaint();
afx_msg HCURSOR OnQueryDragIcon();
afx_msg void OnBtnSearch();
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
private:
CString m_strPath;
CString m_strLog;
BOOL m_bFoundDevice;
};//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.#endif // !defined(AFX_USBPORTDLG_H__BDB23C67_FEB7_11D1_B574_93E4F2DCB761__INCLUDED_)

Answer 2

// USBPortDlg.cpp : implementation file
//#include "stdafx.h"
#include "USBPort.h"
#include "USBPortDlg.h"
#include "hidsdi.h"#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App Aboutclass CAboutDlg : public CDialog
{
public:
CAboutDlg();// Dialog Data
//{{AFX_DATA(CAboutDlg)
enum { IDD = IDD_ABOUTBOX };
//}}AFX_DATA // ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CAboutDlg)
protected:
virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
//}}AFX_VIRTUAL// Implementation
protected:
//{{AFX_MSG(CAboutDlg)
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
//{{AFX_DATA_INIT(CAboutDlg)
//}}AFX_DATA_INIT
}void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CAboutDlg)
//}}AFX_DATA_MAP
}BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
//{{AFX_MSG_MAP(CAboutDlg)
// No message handlers
//}}AFX_MSG_MAP
END_MESSAGE_MAP()/////////////////////////////////////////////////////////////////////////////
// CUSBPortDlg dialogCUSBPortDlg::CUSBPortDlg(CWnd* pParent /*=NULL*/)
: CDialog(CUSBPortDlg::IDD, pParent)
{
//{{AFX_DATA_INIT(CUSBPortDlg)
// NOTE: the ClassWizard will add member initialization here
//}}AFX_DATA_INIT
// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}void CUSBPortDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CUSBPortDlg)
// NOTE: the ClassWizard will add DDX and DDV calls here
//}}AFX_DATA_MAP
}BEGIN_MESSAGE_MAP(CUSBPortDlg, CDialog)
//{{AFX_MSG_MAP(CUSBPortDlg)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_BN_CLICKED(IDC_BTN_SEARCH, OnBtnSearch)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()/////////////////////////////////////////////////////////////////////////////
// CUSBPortDlg message handlersBOOL CUSBPortDlg::OnInitDialog()
{
CDialog::OnInitDialog(); // Add "About..." menu item to system menu. // IDM_ABOUTBOX must be in the system command range.
ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
ASSERT(IDM_ABOUTBOX < 0xF000); CMenu* pSysMenu = GetSystemMenu(FALSE);
if (pSysMenu != NULL)
{
CString strAboutMenu;
strAboutMenu.LoadString(IDS_ABOUTBOX);
if (!strAboutMenu.IsEmpty())
{
pSysMenu->AppendMenu(MF_SEPARATOR);
pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
}
} // Set the icon for this dialog.  The framework does this automatically
//  when the application's main window is not a dialog
SetIcon(m_hIcon, TRUE); // Set big icon
SetIcon(m_hIcon, FALSE); // Set small icon

// TODO: Add extra initialization here

return TRUE;  // return TRUE  unless you set the focus to a control
}void CUSBPortDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
if ((nID & 0xFFF0) == IDM_ABOUTBOX)
{
CAboutDlg dlgAbout;
dlgAbout.DoModal();
}
else
{
CDialog::OnSysCommand(nID, lParam);
}
}// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.void CUSBPortDlg::OnPaint() 
{
if (IsIconic())
{
CPaintDC dc(this); // device context for painting SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0); // Center icon in client rectangle
int cxIcon = GetSystemMetrics(SM_CXICON);
int cyIcon = GetSystemMetrics(SM_CYICON);
CRect rect;
GetClientRect(&rect);
int x = (rect.Width() - cxIcon + 1) / 2;
int y = (rect.Height() - cyIcon + 1) / 2; // Draw the icon
dc.DrawIcon(x, y, m_hIcon);
}
else
{
CDialog::OnPaint();
}
}// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CUSBPortDlg::OnQueryDragIcon()
{
return (HCURSOR) m_hIcon;
}void CUSBPortDlg::OnBtnSearch() 
{
// TODO: Add your control notification handler code here
m_strLog.Empty();    m_strLog=_T("正在查找系统中HID类的GUID标识...\r\n");
    SetDlgItemText(IDC_EDT_REPORT,m_strLog);    // 查找本系统中HID类的GUID标识
    GUID guidHID;
    HidD_GetHidGuid(&guidHID);
    m_strLog+=_T("HID类的GUID标识为:\r\n");    CString strShow;
    strShow.Format("%08x-%04x-%04x-%02x-%02x-%02x-%02x-%02x-%02x-%02x-%02x\r\n",
        guidHID.Data1,guidHID.Data2,guidHID.Data3,guidHID.Data4[0],
        guidHID.Data4[1],guidHID.Data4[2],guidHID.Data4[3],guidHID.Data4[4],
        guidHID.Data4[5],guidHID.Data4[6],guidHID.Data4[7]);    m_strLog+=strShow;
    SetDlgItemText(IDC_EDT_REPORT,m_strLog);    // 准备查找符合HID规范的USB设备
    HDEVINFO hDevInfo = SetupDiGetClassDevs(&guidHID,NULL,0,
                DIGCF_PRESENT|DIGCF_DEVICEINTERFACE);    //查找USB设备接口
    SP_DEVICE_INTERFACE_DATA strtInterfaceData;
    BOOL bSuccess = SetupDiEnumDeviceInterfaces(hDevInfo,NULL,&guidHID,0,
                &strtInterfaceData);    if(!bSuccess)
    {
        m_strLog += _T("抱歉,未找到可用的USB设备");
        SetupDiDestroyDeviceInfoList(hDevInfo);
        return;
    }    //若找到了设备,则读取设备路径名
    SP_DEVICE_INTERFACE_DETAIL_DATA strtDetailData;
    if(!SetupDiGetDeviceInterfaceDetail(hDevInfo,&strtInterfaceData,&strtDetailData,
                sizeof(strtDaetailData),Null,NULL))
    {
        AfxMessageBox(_T("查找设备路径时出错!"));
        SetupDiDestroyDeviceInfoList(hDevInfo);
        return;
    }    // 找到了设备路径
    m_strPath = strtDetailData.DevicePath;
    strShow.Format("可以通过路径%s访问设备.\r\n",(LPCTSTR)m_strPath);
    m_strLog += strShow;
    SetDlgItemText(IDC_EDT_REPORT,m_strLog);    //开放与设备的通信
    HANDLE hCom = CreateFile(m_strPath,GENERIC_READ|GENERIC_WRITE,0,NULL,
                OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
    if(hCom = INVALID_HANDLE_VALUE)
    {
        AfxMessageBox(_T("无法打开通信端口!"));
        SetupDiDestroyDeviceInfoList(hDevInfo);
        return;
    }    //查询设备标识
    HIDD_ATTRIBUTES strtAttrib;
    m_strPath+=_T("正在读取设备的标识...\r\n");
    SetDlgItemText(IDC_EDT_REPORT,m_strLog);    if(!HidD_GetAttributes(hCom,&strtAttrib))
    {
        AfxMsessageBox(_T("查询设备状态时出错!"));
        CloseHandle(hCom);
        SetupDiDestroyDeviceInfoList(hDevInfo);
    }    // 将有关该设备的标识显示出来
    m_strPath += _T("已读取,见右边显示.\r\n");
    SetDlgItemText(IDC_EDT_REPORT,m_strPath);    //显示供应商标识
    strShow.Format("0x%x",strtAttrib.VendorID);
    SetDlgItemText(IDC_ID_VENDOR,strShow);    //显示产品标识
    strShow.Format("0x%x",strtAttrib.ProductID);
    SetDlgItemText(IDC_ID_PRODUCT,strShow);    //显示产品版本号
    strShow.Format("%d",strtAttrib.VersionNumber);
    SetDlgItemText(IDC_ID_VERSION,strShow);    //释放资源
    CloseHandle(hCom);
    SetupDiDestroyDeviceInfoList(hDevInfo);}

Answer 3

HidD_GetHidGuid();
HidD_GetAttributes();
这两个函数不不知要包括什么头文件和什么库，请指教,多谢