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学习了20天的USB协议和上位机，现在都很模糊，快要交毕业设计了，现在的问题是我用SLAVE FIFO模式从上位机采集512个字节数据。然后PC机再从端点中读取。用cypress的固件可以读出FPGA发出的数据，但是用上位MFC程序读取老是存在问题。调试的时候是这个：USB unhandled exception in .exe 0xc0000005:access violation。每次都停在那个对端点的操作语句上。程序贴下子（也是从那个书上找的也是基于cypress提供的那个cybulk吧）：
// SJCJVCDlg.cpp : implementation file
//
#include "stdafx.h"
#include "SJCJVC.h"
#include "SJCJVCDlg.h"
#include "CyAPI.h"
#include "cyioctl.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
CCyControlEndPoint *ept; //¶¨Òå¿ØÖƶ˵ã
CFile mFile; //Îļþ
UINT ReadThreadLoop( LPVOID params ) { //Ï̴߳¦Àí
bool okin;
CSJCJVCDlg *dlg = (CSJCJVCDlg *) params;
OVERLAPPED inOvLap;
PUCHAR inData = new UCHAR[512]; //Êý¾Ý»º³åÇø
ZeroMemory(inData,1024);
inOvLap.hEvent = CreateEvent(NULL, false, false, "CYUSB_IN");
dlg->InEndpt->TimeOut = 0;
for (;dlg->ReadThreadLooping ;) //Ñ»·
{
LONG inlen=512;
//Òì²½¶ÁÊý¾Ý
UCHAR *inContext = dlg->InEndpt->BeginDataXfer(inData,inlen,&inOvLap);
dlg->InEndpt->WaitForXfer(&inOvLap,200);
okin = dlg->InEndpt->FinishDataXfer(inData,inlen, &inOvLap,inContext);
if (okin) //Èç¹û¶ÁÈ¡³É¹¦£¬Ôò±£´æÊý¾Ý
{
mFile.SeekToEnd();
mFile.Write(inData,inlen);
}
}
//½áÊøStart
ept->Target = TGT_DEVICE;
ept->ReqType = REQ_VENDOR;
ept->Direction = DIR_TO_DEVICE;
ept->ReqCode = 0xAB; //ÇëÇóÂë
ept->Value = 0;
ept->Index = 0;
PUCHAR buf=new UCHAR[2];
ZeroMemory(buf, 2);
LONG buflen = 2;
buf[0]=0xAB;
buf[1]=0x00; //½áÊøStart
ept->XferData(buf,buflen);
CloseHandle(inOvLap.hEvent);
delete [] inData;
dlg->ReadThread = NULL; //Ï߳̽áÊø
dlg->USBDevice->Close(); //¹Ø±ÕUSBÉ豸
mFile.Flush(); //¹Ø±ÕÎļþ
mFile.Close();
return true;
}
/////////////////////////////////////////////////////////////////////////////
// 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()
/////////////////////////////////////////////////////////////////////////////
// CSJCJVCDlg dialog
CSJCJVCDlg::CSJCJVCDlg(CWnd* pParent /*=NULL*/)
: CDialog(CSJCJVCDlg::IDD, pParent)
{
//{{AFX_DATA_INIT(CSJCJVCDlg)
// 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 CSJCJVCDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CSJCJVCDlg)
// NOTE: the ClassWizard will add DDX and DDV calls here
//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CSJCJVCDlg, CDialog)
//{{AFX_MSG_MAP(CSJCJVCDlg)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_BN_CLICKED(IDC_BUTTON3, OnButton3)
ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
ON_BN_CLICKED(IDC_BUTTON2, OnButton2)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CSJCJVCDlg message handlers
BOOL CSJCJVCDlg::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
ReadThread=NULL;
USBDevice = new CCyUSBDevice(m_hWnd); //USBÉ豸
ept = USBDevice->ControlEndPt; //USB¿ØÖƶ˵ã
return TRUE; // return TRUE unless you set the focus to a control
}
void CSJCJVCDlg::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 CSJCJVCDlg::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 CSJCJVCDlg::OnQueryDragIcon()
{
return (HCURSOR) m_hIcon;
}
void CSJCJVCDlg::OnButton3()
{
// TODO: Add your control notification handler code here
if(USBDevice->IsOpen()) //USBÊÇ·ñ´ò¿ª
SetDlgItemText(IDC_STATIC,"USBÉ豸ÒѾÁ¬½Ó!");
else
SetDlgItemText(IDC_STATIC,"δÁ¬½ÓUSBÉ豸!");
int vID,pID;
CString str;
vID=USBDevice->VendorID; //¶ÁÈ¡VID
pID=USBDevice->ProductID; //¶ÁÈ¡PID
str.Format("VendorID=0x%x",vID);
SetDlgItemText(IDC_STATIC1,str);
str.Format("ProductID=0x%x",pID);
SetDlgItemText(IDC_STATIC2,str);
PCHAR dn=new CHAR[256];
dn=USBDevice->DeviceName; //¶ÁÈ¡É豸Ãû³Æ
str.Format("É豸Ãû³Æ£º%s",dn);
SetDlgItemText(IDC_STATIC3,str);
}
void CSJCJVCDlg::OnOK()
{
// TODO: Add extra validation here
USBDevice->Close(); //¹Ø±ÕUSBÉ豸
CDialog::OnOK();
}
void CSJCJVCDlg::OnCancel()
{
// TODO: Add extra cleanup here
USBDevice->Close(); //¹Ø±ÕUSBÉ豸
CDialog::OnCancel();
}
void CSJCJVCDlg::OnButton1()
{
// TODO: Add your control notification handler code here
ept->Target = TGT_DEVICE;
ept->ReqType = REQ_VENDOR;
ept->Direction = DIR_TO_DEVICE;
ept->ReqCode = 0xAB; //ÇëÇóÂë
ept->Value = 0;
ept->Index = 0;
PUCHAR buf=new UCHAR[2];
ZeroMemory(buf, 2);
LONG buflen = 2;
buf[0]=0xAB;
buf[1]=0x01; //Æô¶¯Start
ept->XferData(buf,buflen); //×Ô¶¨ÒåÊý¾Ý´«Êä
mFile.Open("FileRecevieTest.txt",CFile::modeWrite|CFile::modeCreate);
//´ò¿ªÎļþ
mFile.SetLength(0); //ÎļþÇå¿Õ
}
void CSJCJVCDlg::OnButton2()
{
// TODO: Add your control notification handler code here
if (ReadThread)
{
ReadThreadLooping = false;
ReadThread=NULL; //Ï߳̽áÊø
SetDlgItemText(IDC_EDIT1,"´«ÊäÍê±Ï£¡");
}
else
{
if (USBDevice->IsOpen()) { //¼ì²âUSBÊÇ·ñ´ò¿ª
ReadThreadLooping = true;
ReadThread = AfxBeginThread(ReadThreadLoop, this); //¿ªÆôÏß³Ì
SetDlgItemText(IDC_EDIT1,"ÕýÔÚ´«Ê䣡");
}
}
}
比较急哦，希望高手们帮帮我，谢谢了。 |
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发表于 2012-4-22 11:20:31
楼主
