+
+               /* Inline Functions: */
+                       /** Returns the current USB frame number, when in device mode. Every millisecond the USB bus is active (i.e. enumerated to a host)
+                        *  the frame number is incremented by one.
+                        */
+                       static inline uint16_t USB_Device_GetFrameNumber(void)
+                       {
+                               return UDFNUM;
+                       }
+
+                       #if !defined(NO_SOF_EVENTS)
+                               /** Enables the device mode Start Of Frame events. When enabled, this causes the
+                                *  \ref EVENT_USB_Device_StartOfFrame() event to fire once per millisecond, synchronized to the USB bus,
+                                *  at the start of each USB frame when enumerated in device mode.
+                                *
+                                *  \note Not available when the NO_SOF_EVENTS compile time token is defined.
+                                */
+                               static inline void USB_Device_EnableSOFEvents(void) ATTR_ALWAYS_INLINE;
+                               static inline void USB_Device_EnableSOFEvents(void)
+                               {
+                                       USB_INT_Enable(USB_INT_SOFI);
+                               }
+
+                               /** Disables the device mode Start Of Frame events. When disabled, this stops the firing of the
+                                *  \ref EVENT_USB_Device_StartOfFrame() event when enumerated in device mode.
+                                *
+                                *  \note Not available when the NO_SOF_EVENTS compile time token is defined.
+                                */
+                               static inline void USB_Device_DisableSOFEvents(void) ATTR_ALWAYS_INLINE;
+                               static inline void USB_Device_DisableSOFEvents(void)
+                               {
+                                       USB_INT_Disable(USB_INT_SOFI);
+                               }
+                       #endif
+