USB_CLASS_PRINTER
if (ifd->desc.bInterfaceClass != USB_CLASS_PRINTER ||
{ USB_DEVICE_INFO(USB_CLASS_PRINTER, 1, 1) },
{ USB_DEVICE_INFO(USB_CLASS_PRINTER, 1, 2) },
{ USB_DEVICE_INFO(USB_CLASS_PRINTER, 1, 3) },
{ USB_INTERFACE_INFO(USB_CLASS_PRINTER, 1, 1) },
{ USB_INTERFACE_INFO(USB_CLASS_PRINTER, 1, 2) },
{ USB_INTERFACE_INFO(USB_CLASS_PRINTER, 1, 3) },
{USB_CLASS_PRINTER, "print"},
&& alt_setting->desc.bInterfaceClass == USB_CLASS_PRINTER)
.bInterfaceClass = USB_CLASS_PRINTER,