Add missing "used" attribute to ATTR_INIT_SECTION to ensure functions declared with that meta-attribute are not discarded by the linker.

Add missing function and definition documentation.

LUFA/Common/Attributes.h

@@ -126,7 +126,7 @@
 			 *
 			 *  \param[in] SectionIndex  Initialization section number where the function should be placed.
 			 */
-			#define ATTR_INIT_SECTION(SectionIndex) __attribute__ ((naked, section (".init" #SectionIndex )))
+			#define ATTR_INIT_SECTION(SectionIndex) __attribute__ ((used, naked, section (".init" #SectionIndex )))
 
 			/** Marks a function as an alias for another function.
 			 *

LUFA/Common/Common.h

@@ -220,6 +220,8 @@
 			 *  etc.
 			 *
 			 *  \param[in] Byte  Byte of data whose bits are to be reversed.
+			 *
+			 *  \return Input data with the individual bits reversed (mirrored).
 			 */
 			static inline uint8_t BitReverse(uint8_t Byte) ATTR_WARN_UNUSED_RESULT ATTR_CONST;
 			static inline uint8_t BitReverse(uint8_t Byte)

LUFA/Common/Endianness.h

@@ -390,6 +390,8 @@
 			 *  \ingroup Group_ByteSwapping
 			 *
 			 *  \param[in] Word  Word of data whose bytes are to be swapped.
+			 *
+			 *  \return Input data with the individual bytes reversed.
 			 */
 			static inline uint16_t SwapEndian_16(const uint16_t Word) ATTR_WARN_UNUSED_RESULT ATTR_CONST;
 			static inline uint16_t SwapEndian_16(const uint16_t Word)
@@ -419,6 +421,8 @@
 			 *  \ingroup Group_ByteSwapping
 			 *
 			 *  \param[in] DWord  Double word of data whose bytes are to be swapped.
+			 *
+			 *  \return Input data with the individual bytes reversed.
 			 */
 			static inline uint32_t SwapEndian_32(const uint32_t DWord) ATTR_WARN_UNUSED_RESULT ATTR_CONST;
 			static inline uint32_t SwapEndian_32(const uint32_t DWord)
@@ -453,6 +457,8 @@
 			 *
 			 *  \param[in,out] Data    Pointer to a number containing an even number of bytes to be reversed.
 			 *  \param[in]     Length  Length of the data in bytes.
+			 *
+			 *  \return Input data with the individual bytes reversed.
 			 */
 			static inline void SwapEndian_n(void* const Data,
 			                                uint8_t Length) ATTR_NON_NULL_PTR_ARG(1);

LUFA/Drivers/Board/AVR8/XPLAIN/Dataflash.h

@@ -76,16 +76,16 @@
 			/** Mask for the first dataflash chip selected. */
 			#define DATAFLASH_CHIP1                      0
 
-			#if (BOARD == BOARD_XPLAIN_REV1)
+			#if ((BOARD != BOARD_XPLAIN_REV1) || defined(__DOXYGEN__))
-				#define DATAFLASH_PAGE_SIZE              256
-
-				#define DATAFLASH_PAGES                  2048
-			#else
 				/** Internal main memory page size for the board's dataflash ICs. */
 				#define DATAFLASH_PAGE_SIZE              1024
 
 				/** Total number of pages inside each of the board's dataflash ICs. */
 				#define DATAFLASH_PAGES                  8192
+			#else
+				#define DATAFLASH_PAGE_SIZE              256
+
+				#define DATAFLASH_PAGES                  2048
 			#endif
 
 		/* Inline Functions: */

LUFA/Drivers/Misc/AT45DB321C.h

@@ -54,8 +54,6 @@
 			#define DF_STATUS_SECTORPROTECTION_ON           (1 << 1)
 			//@}
 
-			#define DF_MANUFACTURER_ATMEL                   0x1F
-
 			/** \name Dataflash Commands */
 			//@{
 			#define DF_CMD_GETSTATUS                        0xD7
@@ -93,6 +91,9 @@
 			#define DF_CMD_READMANUFACTURERDEVICEINFO       0x9F
 			//@}
 
+			/** Manufacturer code for Atmel Corporation, returned by Atmel Dataflash ICs in response to the \c DF_CMD_READMANUFACTURERDEVICEINFO command. */
+			#define DF_MANUFACTURER_ATMEL                   0x1F
+
 #endif
 
 /** @} */

LUFA/Drivers/Misc/AT45DB642D.h

@@ -55,8 +55,6 @@
 			#define DF_STATUS_BINARYPAGESIZE_ON             (1 << 0)
 			//@}
 
-			#define DF_MANUFACTURER_ATMEL                   0x1F
-
 			/** \name Dataflash Commands */
 			//@{
 			#define DF_CMD_GETSTATUS                        0xD7
@@ -109,6 +107,9 @@
 			#define DF_CMD_READMANUFACTURERDEVICEINFO       0x9F
 			//@}
 
+			/** Manufacturer code for Atmel Corporation, returned by Atmel Dataflash ICs in response to the \c DF_CMD_READMANUFACTURERDEVICEINFO command. */
+			#define DF_MANUFACTURER_ATMEL                   0x1F
+
 #endif
 
 /** @} */

LUFA/Drivers/Peripheral/AVR8/ADC_AVR8.h

@@ -403,6 +403,8 @@
 			 *        the results read directly from the \ref ADC_GetResult() instead to reduce overhead.
 			 *
 			 *  \param[in] MUXMask  Mask comprising of an ADC channel mask, reference mask and adjustment mask.
+			 *
+			 *  \return Converted ADC result for the given ADC channel.
 			 */
 			static inline uint16_t ADC_GetChannelReading(const uint16_t MUXMask) ATTR_WARN_UNUSED_RESULT;
 			static inline uint16_t ADC_GetChannelReading(const uint16_t MUXMask)

LUFA/Drivers/USB/Class/Common/RNDIS.h

@@ -114,7 +114,10 @@
 		#define REMOTE_NDIS_MEDIA_STATE_DISCONNECTED  0x00000001UL
 		//@}
 		
+		/** \name RNDIS Media Types */
+		//@{
 		#define REMOTE_NDIS_MEDIUM_802_3              0x00000000UL
+		//@}
 
 		/** \name RNDIS Connection Types */
 		//@{

LUFA/Drivers/USB/Class/Host/MassStorage.h

@@ -122,6 +122,7 @@
 			} SCSI_Capacity_t;
 
 		/* Enums: */
+			/** Enum for the possible error codes returned by the \ref MS_Host_ConfigurePipes() function. */
 			enum MS_Host_EnumerationFailure_ErrorCodes_t
 			{
 				MS_ENUMERROR_NoError                    = 0, /**< Configuration Descriptor was processed successfully. */

LUFA/Drivers/USB/Class/Host/Printer.h

@@ -105,6 +105,7 @@
 			} USB_ClassInfo_PRNT_Host_t;
 
 		/* Enums: */
+			/** Enum for the possible error codes returned by the \ref PRNT_Host_ConfigurePipes() function. */
 			enum PRNT_Host_EnumerationFailure_ErrorCodes_t
 			{
 				PRNT_ENUMERROR_NoError                    = 0, /**< Configuration Descriptor was processed successfully. */

LUFA/Drivers/USB/Core/AVR8/Device_AVR8.h

@@ -148,6 +148,8 @@
 		/* 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.
+			 *
+			 *  \return Current USB frame number from the USB controller.
 			 */
 			static inline uint16_t USB_Device_GetFrameNumber(void) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT;
 			static inline uint16_t USB_Device_GetFrameNumber(void)

LUFA/Drivers/USB/Core/AVR8/Host_AVR8.h

@@ -128,6 +128,8 @@
 		/* Inline Functions: */
 			/** Returns the current USB frame number, when in host mode. Every millisecond the USB bus is active (i.e. not suspended)
 			 *  the frame number is incremented by one.
+			 *
+			 *  \return Current USB frame number from the USB controller.
 			 */
 			static inline uint16_t USB_Host_GetFrameNumber(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
 			static inline uint16_t USB_Host_GetFrameNumber(void)

LUFA/Drivers/USB/Core/DeviceStandardReq.c

@@ -48,11 +48,18 @@ bool    USB_Device_RemoteWakeupEnabled;
 
 void USB_Device_ProcessControlRequest(void)
 {
+	#if defined(ARCH_BIG_ENDIAN)
 	USB_ControlRequest.bmRequestType = Endpoint_Read_8();
 	USB_ControlRequest.bRequest      = Endpoint_Read_8();
 	USB_ControlRequest.wValue        = Endpoint_Read_16_LE();
 	USB_ControlRequest.wIndex        = Endpoint_Read_16_LE();
 	USB_ControlRequest.wLength       = Endpoint_Read_16_LE();
+	#else
+	uint8_t* RequestHeader = (uint8_t*)&USB_ControlRequest;
+
+	for (uint8_t RequestHeaderByte = 0; RequestHeaderByte < sizeof(USB_Request_Header_t); RequestHeaderByte++)
+	  *(RequestHeader++) = Endpoint_Read_8();
+	#endif
 
 	EVENT_USB_Device_ControlRequest();
 

LUFA/Drivers/USB/Core/StdDescriptors.h

@@ -669,7 +669,7 @@
 			{
 				USB_Descriptor_Header_t Header; /**< Descriptor header, including type and size. */
 
-				#if ((ARCH == ARCH_AVR8) || (ARCH == ARCH_XMEGA))
+				#if (((ARCH == ARCH_AVR8) || (ARCH == ARCH_XMEGA)) && !defined(__DOXYGEN__))
 				wchar_t  UnicodeString[];
 				#else
 				uint16_t UnicodeString[]; /**< String data, as unicode characters (alternatively,

LUFA/Drivers/USB/Core/UC3/Device_UC3.h

@@ -145,6 +145,8 @@
 		/* 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.
+			 *
+			 *  \return Current USB frame number from the USB controller.
 			 */
 			static inline uint16_t USB_Device_GetFrameNumber(void) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT;
 			static inline uint16_t USB_Device_GetFrameNumber(void)

LUFA/Drivers/USB/Core/UC3/Host_UC3.h

@@ -129,6 +129,8 @@
 		/* Inline Functions: */
 			/** Returns the current USB frame number, when in host mode. Every millisecond the USB bus is active (i.e. not suspended)
 			 *  the frame number is incremented by one.
+			 *
+			 *  \return Current USB frame number from the USB controller.
 			 */
 			static inline uint16_t USB_Host_GetFrameNumber(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
 			static inline uint16_t USB_Host_GetFrameNumber(void)

LUFA/Drivers/USB/Core/XMEGA/Device_XMEGA.h

@@ -136,6 +136,8 @@
 		/* 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.
+			 *
+			 *  \return Current USB frame number from the USB controller.
 			 */
 			static inline uint16_t USB_Device_GetFrameNumber(void) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT;
 			static inline uint16_t USB_Device_GetFrameNumber(void)