用vc实现操作usb设备(打印机)

zhuxuefengjssn 2008-06-26 10:52:36

怎样用vc实现图形界面与打印机链接并向打印机发送要打印的数据并且能读取打印机实际接收到的数据(通过usb链接的).谢谢!谢谢各位高手了,最好有源码zhuxuefengjssn@yahoo.com.cn

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zhuxuefengjssn 2008-07-14

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自己再顶一下，请高手指点呀！谢谢！

zhuxuefengjssn 2008-07-07

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谢谢您的回复,我试了,这段程序通过USB端口实现不了,读取和写入没有任何反应,谢谢您!
再次谢谢您的赐教!!!!!

yzcurry 2008-06-30

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//***************************************************************//
// 函数功能:调用读串口API的函数 //
// 函数参数:存放串口内容的字符串及要读取的长度 //
// 函数返回值:读入的长度 //
// 编写人:孙雪松编写日期:2003年11月21日 //
//***************************************************************//

DWORD CDownLoadWavDlg::ReadComm(char *buf,DWORD dwLength)
{
BOOL fState;
DWORD length=0;

COMSTAT ComStat;
DWORD dwErrorFlags;
ClearCommError(hPipeRead,&dwErrorFlags,&ComStat);
length=min(dwLength,ComStat.cbInQue);
//读串口
fState=ReadFile(hPipeRead,buf,length,&length,NULL);//
return length;
}

//***************************************************************//
// 函数功能:调用写串口API的函数. //
// 函数参数:将要写的内容及和长度 //
// 函数返回值: 写入的长度 //
// 编写人:孙雪松编写日期:2003年11月21日 //
//***************************************************************//

DWORD CDownLoadWavDlg::WriteCommand(char *buf,DWORD dwLength)
{
BOOL fState;
DWORD length=0;
length=dwLength;

COMSTAT ComStat;
DWORD dwErrorFlags;
ClearCommError(hPipeWrite,&dwErrorFlags,&ComStat);
PurgeComm(hPipeWrite, PURGE_RXCLEAR | PURGE_TXCLEAR | PURGE_RXABORT | PURGE_TXABORT);
//写串口
fState=WriteFile(hPipeWrite,buf,length,&length,NULL);
return length;
}

//***************************************************************//
// 函数功能:读串口中的数据函数(并可做一定的处理) //
// 函数参数:参数一,串口事件,参数二,未用 //
// 函数返回值:0为正确,-1为错误 //
// 编写人:孙雪松编写日期:2003年11月21日 //
//***************************************************************//
int CDownLoadWavDlg::ThreadReadCom(WPARAM wParam,LPVOID pParam)
{
char buf[64];
int nLength;

if((wParam & EV_RXCHAR)!=EV_RXCHAR)
{
return 0;
}

//读数据
nLength=ReadComm(buf,64);

if(nLength)
{
for(int i=0;i<nLength;i++)
{
bufReturn[i]=buf[i];//+ReLenght
}
}

/* CString aaa,bbb;
for(int j=0;j<nLength;j++)
{
aaa.Format("0X%02x ",bufReturn[j]);
bbb+=aaa;
}
m_list.AddString(bbb);*/

ReadEvent.SetEvent();

return nLength;
}

int CDownLoadWavDlg::CloseUSB()
{
eventkill.SetEvent();
m_pThread=NULL;

SetEvent(m_hPostMsgEvent);

if(m_hPostMsgEvent)
CloseHandle(m_hPostMsgEvent);

if(m_osRead.hEvent)
CloseHandle(m_osRead.hEvent);
if(m_osWrite.hEvent)
CloseHandle(m_osWrite.hEvent);

if(hPipeRead != INVALID_HANDLE_VALUE) //打开 Pipe 成功
{
CloseHandle(hPipeRead);
}

if(hPipeWrite != INVALID_HANDLE_VALUE) //打开 Pipe 成功
{
CloseHandle(hPipeWrite);
}

return 1;
}

void CDownLoadWavDlg::OnButtonOpen()
{
// TODO: Add your control notification handler code here

//驱动程序里面的读Pipe名, 对应访问某个端点的 I/O, 需要与驱动一致
m_Scroller.Cleanup();
m_list.ShowWindow(SW_SHOWNORMAL);

hPipeRead = OpenMyDevPipe("PIPE00");
if(hPipeRead != INVALID_HANDLE_VALUE) //打开读Pipe成功
{
//m_list.AddString("提示:读端点0打开成功.");
m_list.InsertItem("提示:读端点0打开成功.", 0, RGB(0,0,0), RGB(9,239,26));
}
else
{
//m_list.AddString("提示:读端点0未打开成功.");
m_list.InsertItem("提示:读端点0未打开成功.", 0,RGB(0,0,0),RGB(9,239,26));
}
//驱动程序里面的写Pipe名, 对应访问某个端点的 I/O, 需要与驱动一致
hPipeWrite= OpenMyDevPipe("PIPE01");
if(hPipeWrite != INVALID_HANDLE_VALUE) //打开写Pipe成功
{
//m_list.AddString("提示:写端点1打开成功.");
m_list.InsertItem("提示:写端点1打开成功.", 0,RGB(0,0,0), RGB(9,239,26));
}
else
{
//m_list.AddString("提示:读端点1未打开成功.");
m_list.InsertItem("提示:读端点1未打开成功.", 0,RGB(0,0,0),RGB(9,239,26));
}
}

void CDownLoadWavDlg::OnCancel()
{
// TODO: Add extra cleanup here
CloseUSB();
m_Ticker.Cleanup();
m_Scroller.Cleanup();
CDialog::OnCancel();
}

yzcurry 2008-06-30

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UINT CommProcOne(LPVOID pParam)
{
COMSTAT ComStat;
DWORD dwErrorFlags;
int ReTemp=0;
CDownLoadWavDlg *pdlg=(CDownLoadWavDlg *)pParam;

while(1)
{
if (::WaitForSingleObject(pdlg->eventkill,0)==WAIT_OBJECT_0)
{
break;
}
//字符数2
ClearCommError(hPipeRead,&dwErrorFlags,&ComStat);
if(ComStat.cbInQue>0)
{
WaitForSingleObject(pdlg->m_hPostMsgEvent,INFINITE);
ResetEvent(pdlg->m_hPostMsgEvent);

ReTemp=pdlg->ThreadReadCom(EV_RXCHAR,0);

ReLenght+=ReTemp;
//1为命令包的长度
if (ReLenght>=2)
{
//::WaitForSingleObject(pdlg->MSGevent,INFINITE);
ReLenght=0;
}
//continue;
}
}
return 0;
}
HANDLE CDownLoadWavDlg::OpenOneDevice(HDEVINFO hDvcInfo, PSP_INTERFACE_DEVICE_DATA DvcInfoData, char *sDevNameBuf)
{
HANDLE hOut = INVALID_HANDLE_VALUE;

ULONG iReqLen = 0;
SetupDiGetInterfaceDeviceDetail(hDvcInfo, DvcInfoData, NULL, 0, &iReqLen, NULL);

ULONG iDevDataLen = iReqLen; //sizeof(SP_FNCLASS_DEVICE_DATA) + 512;
PSP_INTERFACE_DEVICE_DETAIL_DATA pDevData = (PSP_INTERFACE_DEVICE_DETAIL_DATA)malloc(iDevDataLen);

pDevData->cbSize = sizeof(SP_INTERFACE_DEVICE_DETAIL_DATA);
if(SetupDiGetInterfaceDeviceDetail(hDvcInfo, DvcInfoData, pDevData, iDevDataLen, &iReqLen, NULL))
{
strcpy(sDevNameBuf, pDevData->DevicePath);
hOut = CreateFile(pDevData->DevicePath, GENERIC_READ|GENERIC_WRITE, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL);
}

free(pDevData);
return hOut;
}

HANDLE CDownLoadWavDlg::OpenUsbDevice(LPGUID pGuid, char *sDevNameBuf)
{
HANDLE hOut = INVALID_HANDLE_VALUE;

HDEVINFO hDevInfo = SetupDiGetClassDevs(pGuid, NULL, NULL, DIGCF_PRESENT|DIGCF_INTERFACEDEVICE);

SP_INTERFACE_DEVICE_DATA deviceInfoData;
deviceInfoData.cbSize = sizeof (SP_INTERFACE_DEVICE_DATA);

ULONG nGuessCount = MAXLONG;
for(ULONG iDevIndex=0; iDevIndex<nGuessCount; iDevIndex++)
{
if(SetupDiEnumDeviceInterfaces(hDevInfo, 0, pGuid, iDevIndex, &deviceInfoData))
{
if((hOut=OpenOneDevice(hDevInfo, &deviceInfoData, sDevNameBuf)) != INVALID_HANDLE_VALUE)
break;
}
else if(GetLastError() == ERROR_NO_MORE_ITEMS) //No more items
{
break;
}
}
SetupDiDestroyDeviceInfoList(hDevInfo);
return hOut;
}

bool CDownLoadWavDlg::GetUsbDeviceFileName(LPGUID pGuid, char *sDevNameBuf)
{
HANDLE hDev = OpenUsbDevice(pGuid, sDevNameBuf);
if(hDev != INVALID_HANDLE_VALUE)
{
CloseHandle(hDev);
return true;
}
return false;
}

HANDLE CDownLoadWavDlg::OpenMyDevice()
{
char DeviceName[512] = "";
return OpenUsbDevice((LPGUID)&GUID_CLASS_D12_BULK, DeviceName);
}

HANDLE CDownLoadWavDlg::OpenMyDevPipe(const char *PipeName)
{
char DeviceName[512] = "";
if(GetUsbDeviceFileName((LPGUID)&GUID_CLASS_D12_BULK, DeviceName))
{
strcat(DeviceName,"\\");
strcat(DeviceName,PipeName);
return CreateFile(DeviceName, GENERIC_WRITE|GENERIC_READ, FILE_SHARE_WRITE|FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);
}
return INVALID_HANDLE_VALUE;
}

zhuxuefengjssn 2008-06-27