protected static extern bool HidD_GetAttributes(IntPtr hFile, ref HidDAttributes pAttributes);
//public static FileStream Open(string tSerial, string tMan)
public static FileStream Open(UInt16 vid, UInt16 pid, int report_length)
{
FileStream devFile = null;
Guid gHid;
HidD_GetHidGuid(out gHid);
// create list of HID devices present right now
var hInfoSet = SetupDiGetClassDevs(ref gHid, null, IntPtr.Zero, DIGCF_DEVICEINTERFACE | DIGCF_PRESENT);
var iface = new DeviceInterfaceData(); // allocate mem for interface descriptor
iface.Size = Marshal.SizeOf(iface); // set size field
uint index = 0; // interface index
// Enumerate all interfaces with HID GUID
while (SetupDiEnumDeviceInterfaces(hInfoSet, 0, ref gHid, index, ref iface))
{
var detIface = new DeviceInterfaceDetailData(); // detailed interface information
uint reqSize = (uint)Marshal.SizeOf(detIface); // required size
detIface.Size = Marshal.SizeOf(typeof(IntPtr)) == 8 ? 8 : 5; // Size depends on arch (32 / 64 bit), distinguish by IntPtr size
// get device path
SetupDiGetDeviceInterfaceDetail(hInfoSet, ref iface, ref detIface, reqSize, ref reqSize, IntPtr.Zero);
var path = detIface.DevicePath;
System.Console.WriteLine("Path: {0}", path);
// Open filehandle to device
var handle = CreateFile(path, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, IntPtr.Zero, OPEN_EXISTING, FILE_FLAG_OVERLAPPED, IntPtr.Zero);
if (handle == INVALID_HANDLE_VALUE)
{
//System.Console.WriteLine("Invalid handle");
index++;
continue;
}
IntPtr lpData;
HidDAttributes pAttributes = new HidDAttributes();
if (HidD_GetPreparsedData(handle, out lpData))
{
HidCaps oCaps;
HidP_GetCaps(lpData, out oCaps); // extract the device capabilities from the internal buffer
int inp = oCaps.InputReportByteLength; // get the input...
int outp = oCaps.OutputReportByteLength; // ... and output report length
HidD_FreePreparsedData(ref lpData);
System.Console.WriteLine("Input: {0}, Output: {1}", inp, outp);
// we have report length matching our input / output report, so we create a device file in each case
if (inp == report_length && outp == report_length)
{
HidD_GetAttributes(handle, ref pAttributes);
//Check PID&VID
if (pAttributes.ProductID == pid && pAttributes.VendorID == vid)
{
var shandle = new SafeFileHandle(handle, false);
devFile = new FileStream(shandle, FileAccess.Read | FileAccess.Write, 32, true);
break;
}
}
}
index++;
}
SetupDiDestroyDeviceInfoList(hInfoSet);
return(devFile);
}
