public static List <DeviceInfo> FindDevices(FindDeviceCallback callback = null)
{
findDeviceDebugInfo.Clear();
// set up an empty return list
List <DeviceInfo> devices = new List <DeviceInfo>();
// get the list of devices matching the HID class GUID
Guid guid = Guid.Empty;
HIDImports.HidD_GetHidGuid(out guid);
IntPtr hdev = HIDImports.SetupDiGetClassDevs(ref guid, null, IntPtr.Zero, HIDImports.DIGCF_DEVICEINTERFACE);
// set up the attribute structure buffer
HIDImports.SP_DEVICE_INTERFACE_DATA diData = new HIDImports.SP_DEVICE_INTERFACE_DATA();
diData.cbSize = Marshal.SizeOf(diData);
// read the devices in our list
for (uint i = 0;
HIDImports.SetupDiEnumDeviceInterfaces(hdev, IntPtr.Zero, ref guid, i, ref diData);
++i)
{
// get the size of the detail data structure
UInt32 size = 0;
HIDImports.SetupDiGetDeviceInterfaceDetail(hdev, ref diData, IntPtr.Zero, 0, out size, IntPtr.Zero);
String debugInfo = "#" + i + " (" + hdev.ToString() + ")";
// now actually read the detail data structure
HIDImports.SP_DEVICE_INTERFACE_DETAIL_DATA diDetail = new HIDImports.SP_DEVICE_INTERFACE_DETAIL_DATA();
diDetail.cbSize = (IntPtr.Size == 8) ? (uint)8 : (uint)5;
HIDImports.SP_DEVINFO_DATA devInfoData = new HIDImports.SP_DEVINFO_DATA();
devInfoData.cbSize = Marshal.SizeOf(devInfoData);
if (HIDImports.SetupDiGetDeviceInterfaceDetail(hdev, ref diData, ref diDetail, size, out size, out devInfoData))
{
debugInfo += " path=" + diDetail.DevicePath;
// create a file handle to access the device
IntPtr fp = HIDImports.CreateFile(
diDetail.DevicePath, HIDImports.GENERIC_READ_WRITE, HIDImports.SHARE_READ_WRITE,
IntPtr.Zero, HIDImports.OPEN_EXISTING, 0, IntPtr.Zero);
debugInfo += " fp=" + fp.ToString();
// read the attributes
Thread.Sleep(1);
HIDImports.HIDD_ATTRIBUTES attrs = new HIDImports.HIDD_ATTRIBUTES();
attrs.Size = Marshal.SizeOf(attrs);
if (HIDImports.HidD_GetAttributes(fp, ref attrs))
{
// Read the product name string. Note that
String name = "<not available>";
byte[] nameBuf = new byte[256];
if (HIDImports.HidD_GetProductString(fp, nameBuf, 256))
{
name = System.Text.Encoding.Unicode.GetString(nameBuf).TrimEnd('\0');
}
else
{
debugInfo += " [GetProductString failed]";
}
debugInfo += " productString=\"" + name + "\"";
// if the vendor and product ID match an LedWiz, and the
// product name contains "pinscape", it's one of ours
DeviceInfo di;
if (CheckIDMatch(attrs) &&
Regex.IsMatch(name, @"\b(?i)pinscape controller\b") &&
(di = DeviceInfo.Create(
diDetail.DevicePath, name, attrs.VendorID, attrs.ProductID, attrs.VersionNumber)) != null)
{
debugInfo += " [device added]";
// add the device to our list
devices.Add(di);
// if there's a callback, invoke it
if (callback != null)
{
callback(di, hdev, ref devInfoData);
}
}
#if false
// report the results for debugging
Console.Out.WriteLine(
"Product " + attrs.ProductID.ToString("X4")
+ ", vendor " + attrs.VendorID.ToString("X4")
+ ", version " + attrs.VersionNumber.ToString("X4")
+ ", name " + name);
#endif
}
else
{
debugInfo += " [GetAttributes failed]";
}
// done with the file handle
if (fp.ToInt32() != 0 && fp.ToInt32() != -1)
{
HIDImports.CloseHandle(fp);
}
}
else
{
debugInfo += " [GetDeviceInterfaceDetail failed]";
}
findDeviceDebugInfo.Add(debugInfo);
}
// done with the device info list
HIDImports.SetupDiDestroyDeviceInfoList(hdev);
// return the device list
return(devices);
}
