private IntPtr OpenDFUDevice()
{
Guid GUID = GUID_DFU;
DeviceInterfaceData ifData = new DeviceInterfaceData();
ifData.Size = Marshal.SizeOf(ifData);
DeviceInterfaceDetailData ifDetail = new DeviceInterfaceDetailData();
UInt32 Size = 0;
IntPtr hInfoSet = SetupDiGetClassDevs(ref GUID, null, IntPtr.Zero, DIGCF_DEVICEINTERFACE | DIGCF_PRESENT); // this gets a list of all DFU devices currently connected to the computer (InfoSet)
IntPtr hDevice = IntPtr.Zero;
if (hInfoSet == INVALID_HANDLE_VALUE)
{
throw new Exception("Could not open DFU device!");
//throw new Exception("SetupDiGetClassDevs returned error=" + Marshal.GetLastWin32Error().ToString());
}
// Loop ten times hoping to find exactly one DFU device
int i = 10;
uint Index = 0;
while (i-- > 0)
{
Index = 0;
while (SetupDiEnumDeviceInterfaces(hInfoSet, 0, ref GUID, Index, ref ifData))
{
Index++;
}
if (0 == Index)
{
Thread.Sleep(500);
}
else
{
break;
}
}
if (1 == Index)
{
SetupDiEnumDeviceInterfaces(hInfoSet, 0, ref GUID, 0, ref ifData);
SetupDiGetDeviceInterfaceDetail(hInfoSet, ref ifData, IntPtr.Zero, 0, ref Size, IntPtr.Zero);
if (IntPtr.Size == 8) // If we are compiled as 64bit
{
ifDetail.Size = 8;
}
else if (IntPtr.Size == 4) // If we are compiled as 32 bit
{
ifDetail.Size = 5;
}
if (Marshal.SizeOf(ifDetail) < Size)
{
throw new Exception("Could not open DFU device!");
//throw new Exception("ifDetail too small");
}
if (true == SetupDiGetDeviceInterfaceDetail(hInfoSet, ref ifData, ref ifDetail, Size, ref Size, IntPtr.Zero))
{
string DevicePath = ifDetail.DevicePath.ToUpper();
if (STDFU.STDFU_Open(DevicePath, out hDevice) != STDFU.STDFU_NOERROR)
{
throw new Exception("Could not open DFU device!");
}
}
}
else
{
throw new Exception("There must be exactly one DFU device attached to the computer!");
}
SetupDiDestroyDeviceInfoList(hInfoSet);
return(hDevice);
}