Added new USB_Device_GetFrameNumber() and USB_Host_GetFrameNumber() functions to...

[pub/USBasp.git] / LUFA / Drivers / USB / HighLevel / Events.h

diff --git a/LUFA/Drivers/USB/HighLevel/Events.h b/LUFA/Drivers/USB/HighLevel/Events.h
index 5c295b6..ae7debb 100644 (file)
--- a/LUFA/Drivers/USB/HighLevel/Events.h
+++ b/LUFA/Drivers/USB/HighLevel/Events.h
@@ -180,6 +180,23 @@
                         */
                        void EVENT_USB_Host_DeviceEnumerationComplete(void);
 
+                       /** Event for USB Start Of Frame detection, when enabled. This event fires at the start of each USB
+                        *  frame, once per millisecond, and is synchronized to the USB bus. This can be used as an accurate
+                        *  millisecond timer source when the USB bus is not suspended while in host mode.
+                        *
+                        *  This event is time-critical; it is run once per millisecond and thus long handlers will significantly
+                        *  degrade device performance. This event should only be enabled when needed to reduce device wake-ups.
+                        *
+                        *  \note This event is not normally active - it must be manually enabled and disabled via the
+                        *        \ref USB_Host_EnableSOFEvents() and \ref USB_Host_DisableSOFEvents() commands after enumeration of
+                        *        a USB device.
+                        *        \n\n
+                        *
+                        *  \note This event does not exist if the USB_DEVICE_ONLY token is supplied to the compiler (see
+                        *        \ref Group_USBManagement documentation).
+                        */
+                       void EVENT_USB_Host_StartOfFrame(void);
+
                        /** Event for USB device connection. This event fires when the AVR in device mode and the device is connected
                         *  to a host, beginning the enumeration process, measured by a rising level on the AVR's VBUS pin.
                         *
@@ -339,6 +356,7 @@
                                        void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode,
                                                                 const uint8_t SubErrorCode)
                                                                                    ATTR_WEAK ATTR_ALIAS(USB_Event_Stub);
+                                       void EVENT_USB_Host_StartOfFrame(void) ATTR_WEAK ATTR_ALIAS(USB_Event_Stub);
                                #endif
 
                                #if defined(USB_CAN_BE_DEVICE)