关于用应用程序读写Usb接口的问题(暴难)!解决就给分

2004-09-29 11:51:07 363 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

用VC++实现USB接口读写数据的程序用VC++实现USB接口读写数据的程序使用一个GUIDguidHID_1查找并打开一个USB设备 extern "C" int PASCAL SearchUSBDevice() { HANDLE hUsb; int nCount, i, j;//标记同一设备个数 HDEVINFO hDevInfoSet; BOOL bResult; PSP_DEVICE_INTERFACE_DETAIL_DAT 阅读详情

查找到usb的device name并且用createfile打开pipe02以后,用writefile写数据老是失败,是什么原因呢?
CUsbAccess mx1usb;
UpdateData(TRUE);
LPGUID pGuidMx1 = (LPGUID)&MX1USB_GUID;
//if(""==m_PipeName) MessageBox("Open Usb Device");
char *m_PiPeNameChar=m_PipeName.GetBufferSetLength(m_PipeName.GetLength());
hMx1Usb=mx1usb.OpenUsbPipe(pGuidMx1,m_PiPeNameChar); //打开改USB的pipe
//开始写数据
int bResult;
DWORD nBytes;
UpdateData(TRUE);
DWORD m_WriteDataSize=m_WriteData.GetLength();
char *m_WriteDataChar=m_WriteData.GetBufferSetLength(m_WriteDataSize);
bResult=WriteFile(hMx1Usb,m_WriteDataChar,m_WriteDataSize,&nBytes,NULL);
if(bResult!=0)
MessageBox("Write Succeed!","",0);

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