vc++ USBPort编程

启动vc++，新建一个工程，选择MFC APP （exe），然后选择基于对话框就可以。

在stdafx.h中加入#include "hidsdi.h"。在CUSBPortDlg::OnInitDialog()函数中添加代码即可。

另外hidsdi.h这个文件在vc++安装的时候是没有的，这个需要另外下载。

// USBPortDlg.cpp : implementation file

//

#include "stdafx.h"

#include "USBPort.h"

#include "USBPortDlg.h"

#include "setupapi.h"

#include "hidsdi.h"

#ifdef _DEBUG

#define new DEBUG_NEW

#undef THIS_FILE

static char THIS_FILE[] = __FILE__;

#endif

/////////////////////////////////////////////////////////////////////////////

// CAboutDlg dialog used for App About

class 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 dialog

CUSBPortDlg::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_FIND, OnSearch)

//}}AFX_MSG_MAP

END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////

// CUSBPortDlg message handlers

BOOL 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

GetDlgItem(IDC_FIND)->SetFocus();

return FALSE;  // 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::OnSearch()

{

// 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_EDIT_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_EDIT_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);

UINT nIndex = 0;

m_strLog += _T("正在查找可用的USB设备...\r\n");

SetDlgItemText(IDC_EDIT_REPORT,m_strLog);

// 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(strtDetailData),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",m_strPath);

m_strLog += strShow;

SetDlgItemText(IDC_EDIT_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_EDIT_REPORT,m_strPath);

if (!HidD_GetAttributes(hCom,&strtAttrib))

{

  AfxMessageBox(_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，见右边所示\r\n");

SetDlgItemText(IDC_EDIT_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);

}