cyapi来自cyapi类库。即，使用已有的代码访问cysub.sys驱动
cyusb.sys
通过DeviceIoControl()访问cyusb.sys
获取设备名子：
DWORD dwBytes=0; ULONG len=256; UCHAR *buf=new UCHAR[len]; BOOL cyusbStatus=DeviceIoControl(hDevice,IOCTL_ADAPT_GET_DEVICE_NAME, buf,len,buf,len,&dwBytes,NULL); delete [] buf; DWORD BytesXfered; SET_TRANSFER_SIZE_INFO SetTransferInfo; SetTransferInfo.EndpointAddress=0x02; DeviceIoControl(hDevice,IOCTL_ADAPT_GET_TRANSFER_SIZE, &SetTransferInfo,sizeof(SET_TRANSFER_SIZE_INFO), &SetTransferInfo,sizeof(SET_TRANSFER_SIZE_INFO), &BytesXfered,NULL);枚举usb设备:
///enumerate the possible cyusb devices static GUID CYUSBDRV_GUID = {0xae18aa60, 0x7f6a, 0x11d4, 0x97, 0xdd, 0x0, 0x1, 0x2, 0x29, 0xb9, 0x59}; DWORD modules_size=0; // Handle , 设备信息集，包含被请求设备信息元素，在本地电脑上。 HDEVINFO hwDeviceInfo = SetupDiGetClassDevs((LPGUID) &CYUSBDRV_GUID, //设备安装类或接口类GUID指针。 NULL, ///Pnp枚举器标识符. 'USB" NULL, /// 顶层窗口句柄.安装设备实例关联的用户接口的窗口 DIGCF_PRESENT | DIGCF_DEVICEINTERFACE ///i当前存在的设备 ); if (hwDeviceInfo != INVALID_HANDLE_VALUE) { // devInterfaceData SP_DEVICE_INTERFACE_DATA devInterfaceData; devInterfaceData.cbSize = sizeof(devInterfaceData); while( (modules_size< 250) && (SetupDiEnumDeviceInterfaces(hwDeviceInfo, 0, (LPGUID) &CYUSBDRV_GUID,modules_size, &devInterfaceData))) { // deviceInfoData Struktur vorbereiten SP_DEVINFO_DATA deviceInfoData; memset(&deviceInfoData, 0, sizeof(SP_DEVINFO_DATA)); deviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA); // deviceInterfaceDetailData PSP_DEVICE_INTERFACE_DETAIL_DATA deviceInterfaceDetailData; ULONG requiredLength = 0, reservedLength = 0, realLength = 0; if (!SetupDiGetDeviceInterfaceDetail(hwDeviceInfo, &devInterfaceData, NULL, 0, &requiredLength, NULL) ) { int errorCode = GetLastError(); if (errorCode != ERROR_INSUFFICIENT_BUFFER) { perror("ERROR: SetupDiGetDeviceInterfaceDetail()[1] failed - "); printf("ERROR CODE %d (0x%X)\n", errorCode, errorCode); //FreeModuleList(); delete deviceInterfaceDetailData; //return ERR_XXX_SETUPAPI; return 0; } } / the above code was intended to get the buffer size for which the next api need.// reservedLength = requiredLength; deviceInterfaceDetailData = (PSP_INTERFACE_DEVICE_DETAIL_DATA) new char[reservedLength]; memset(deviceInterfaceDetailData, 0, reservedLength); deviceInterfaceDetailData->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA); // Details , c++ formal, is there any another reason? realLength = reservedLength; if (SetupDiGetDeviceInterfaceDetail(hwDeviceInfo, &devInterfaceData, deviceInterfaceDetailData, reservedLength, &realLength, &deviceInfoData)) { // Modul //XXXModule* newModule = new XXXModule((int)modules.size(), deviceInterfaceDetailData->DevicePath); //modules.push_back(newModule); dwCount++; pCommList[n].nPort=(USHORT)n + 384 +1; _tcscpy(pCommList[n].szDevicePath,deviceInterfaceDetailData->DevicePath); /// no error checking! n++; } else { int error = ::GetLastError(); // std::cerr << "XXXEnumerator::UpdateModuleList: SetupDiGetDeviceInterfaceDetail failed with code " << error << " \"" << ErrorMessage(error) << "\"" << std::endl; //FreeModuleList(); //return ERR_XXX_SETUPAPI; return 0; } delete deviceInterfaceDetailData; deviceInterfaceDetailData = NULL; modules_size++; } SetupDiDestroyDeviceInfoList(hwDeviceInfo); //return ERR_XXX_OK; return (USHORT)dwCount; } else { //return ERR_XXX_NODRIVER; return 0; }