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10可用积分
CreateFile成功,WriteFile时失败,GetLastError值为6,谢谢
代码如下:
GUID HidGuid;
HDEVINFO hDevInfoSet;
DWORD MemberIndex = 0;
BOOL Result;
SP_DEVICE_INTERFACE_DATA DevInterfaceData;
DWORD RequiredSize;
PSP_DEVICE_INTERFACE_DETAIL_DATA pDevDetailData;
HANDLE hDevHandle;
hReadHandle = INVALID_HANDLE_VALUE;
hWriteHandle = INVALID_HANDLE_VALUE;
HIDD_ATTRIBUTES DevAttributes;
DevInterfaceData.cbSize = sizeof(DevInterfaceData);
DevAttributes.Size = sizeof(DevAttributes);
HidD_GetHidGuid(&HidGuid);
hDevInfoSet = SetupDiGetClassDevs(&HidGuid, NULL, NULL, DIGCF_DEVICEINTERFACE | DIGCF_PRESENT);
while (1)
{
Result = SetupDiEnumDeviceInterfaces(hDevInfoSet, NULL, &HidGuid, MemberIndex, &DevInterfaceData);
if (!Result)
break;
MemberIndex++;
Result = SetupDiGetDeviceInterfaceDetail(hDevInfoSet, &DevInterfaceData, NULL, NULL, &RequiredSize, NULL);
pDevDetailData = (PSP_DEVICE_INTERFACE_DETAIL_DATA)malloc(RequiredSize);
if (pDevDetailData == NULL)
{
SetupDiDestroyDeviceInfoList(hDevInfoSet);
return;
}
pDevDetailData->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA);
Result = SetupDiGetDeviceInterfaceDetail(hDevInfoSet, &DevInterfaceData, pDevDetailData, RequiredSize, NULL, NULL);
MyDevPathName = pDevDetailData->DevicePath;
free(pDevDetailData);
if (Result == FALSE)
continue;
hDevHandle = CreateFile(MyDevPathName, NULL, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (hDevHandle != INVALID_HANDLE_VALUE)
{
Result = HidD_GetAttributes(hDevHandle, &DevAttributes);
CloseHandle(hDevHandle);
if (Result == FALSE)
continue;
if ((DevAttributes.VendorID == 0x516) && (DevAttributes.ProductID == 0x511B))
{
MyDevFound = TRUE;
hWriteHandle = CreateFile(MyDevPathName, GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED, NULL);
//MyDevPathName为:\\?\hid#vid_0516&pid_511b&mi_03#7&173fc2f5&0&0000#{4d1e55b2-f16f-11cf-88cb-001111000030}
if (hWriteHandle != INVALID_HANDLE_VALUE)
{
PortReadyWrite = true;
unsigned char check_link[] = "HELLOWORLD";
BOOL result;
OVERLAPPED overlapped;
DWORD number;
overlapped.Offset = 0;
overlapped.OffsetHigh = 0;
result = WriteFile(hWriteHandle, check_link, sizeof(check_link), &number, &overlapped);
}
}
}
}
SetupDiDestroyDeviceInfoList(hDevInfoSet);
} |
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