Native port driver BSoD

Official Hardware Mega Due
21

I have found a problem in the Device Descriptor defined in the file USBCore.cpp

USB_DeviceDescriptorA has a device class of 2 if CDC is enabled and a device class of 0, if it is not.

The problem is the Device Descriptor for a Composite Device, needs to have a device class of 0 or Windows will not know it is a Composite Device.

I changed the code to use Device Class 0 in either case and recompiled a sketch.

After changing that, I see 3 devices show up when connected to the Native port. I see a CDC device, a HID mouse, and HID Keyboard.

I haven't done any further testing to make sure they all work, but I don't get the BSOD anymore when installing the serial driver.

#ifdef CDC_ENABLED
#define DEVICE_CLASS 0x02
#else
#define DEVICE_CLASS 0x00
#endif

//	DEVICE DESCRIPTOR
const DeviceDescriptor USB_DeviceDescriptor =
	D_DEVICE(0x00,0x00,0x00,64,USB_VID,USB_PID,0x100,IMANUFACTURER,IPRODUCT,0,1);

const DeviceDescriptor USB_DeviceDescriptorA =
	D_DEVICE(DEVICE_CLASS,0x00,0x00,64,USB_VID,USB_PID,0x100,IMANUFACTURER,IPRODUCT,0,1);

...

if (USB_DEVICE_DESCRIPTOR_TYPE == t)
	{
		TRACE_CORE(puts("=> USBD_SendDescriptor : USB_DEVICE_DESCRIPTOR_TYPE\r\n");)
		if (setup.wLength >= 8)
		{
			_cdcComposite = 1;
		}
		desc_addr = _cdcComposite ?  (const uint8_t*)&USB_DeviceDescriptorA : (const uint8_t*)&USB_DeviceDescriptor;
        if( *desc_addr > setup.wLength ) {
            desc_length = setup.wLength;
        }
	}