Thread: DirectInput devicetype and subtype issues.

This is odd and I'm beginning to wonder if the dwDevType field of:

Code:

typedef struct DIDEVICEINSTANCE {
    DWORD dwSize;
    GUID guidInstance;
    GUID guidProduct;
    DWORD dwDevType;
    TCHAR tszInstanceName[MAX_PATH];
    TCHAR tszProductName[MAX_PATH];
    GUID guidFFDriver;
    WORD wUsagePage;
    WORD wUsage;
} DIDEVICEINSTANCE, *LPDIDEVICEINSTANCE;

Still works.

I have a Saitek X-52 with pedals and I'm making a small bit of code to enumerate everything since the basic GUID only allows 6 axis and 32 buttons whereas my Saitek has 9 axis and 34 buttons.

When generating a report, I'm clearing the DIDEVTYPE_HID bit to get a value for a loopup table of device type and subtype.

Well, my stick is registering as a 1st Person, 6DOF and my pedals as a limited joystick, so now I'm wondering if the type and subtype can't be trusted or if I'm doing it wrong.

The lookup table:

Code:

struct DevType
{
	DWORD		dwType;
	wchar_t		*cType;
} devtype[] = 
{
	{ DI8DEVTYPE_DEVICE,											L"General Purpose Device" },
	{ DI8DEVTYPE_MOUSE | (DI8DEVTYPEMOUSE_UNKNOWN << 8),			L"Mouse, Uknown" },
	{ DI8DEVTYPE_MOUSE | (DI8DEVTYPEMOUSE_TRADITIONAL << 8),		L"Mouse, Traditional" },
.
.
.

The whole table is there for all the values in dinput.h.

The loop code so far:

Code:

	for( std::list<IDData>::iterator idit = id_list.begin(); idit != id_list.end(); idit++ )
	{
		IDData inputdevice = *idit;
		BOOL bHIDBool = inputdevice.di_InputDeviceData.dwDevType && DIDEVTYPE_HID;
		DWORD dwTypeAndSubType = inputdevice.di_InputDeviceData.dwDevType & ~DIDEVTYPE_HID;

		wprintf( L"Product name: %s\n", inputdevice.di_InputDeviceData.tszProductName );

		if( inputdevice.di_InputDeviceData.dwDevType && DIDEVTYPE_HID )
			wprintf( L"HID: %-15s", HID(inputdevice.di_InputDeviceData.dwDevType));
		
		for( int i = 0; devtype[i].dwType != 0; i++ )
			if( devtype[i].dwType == dwTypeAndSubType )
				wprintf( L"Device Type: %s\n", devtype[i].cType );

	}

Am I screwing up the value of dwTypeAndSubType with a bad operation or is the problem elsewhere?