Replace all calls and references to _delay_ms() in the code with the architecture-agnostic Delay_MS() function.

Improve code generation for the Delay_MS() function on the AVR8 architecture when called with a constant input.

Renamed all low level Endpoint_Read_*, Endpoint_Write_* and Endpoint_Discard_* functions to use the number of bits instead of a symbolic size (Byte, Word, DWord) so that the function names are applicable and correct across all architectures.

Renamed all low level Pipe_Read_*, Pipe_Write_* and Pipe_Discard_* functions to use the number of bits instead of a symbolic size (Byte, Word, DWord) so that the function names are applicable and correct across all architectures.

Conditionally add available address spaces to the address space enum, for multiple address space architectures.

Update Doxygen configuration file for the latest Doxygen release.

Minor documentation updates.

Add in new architecture attribute defines to selectively remove the EEPROM and FLASH memory space functions on architectures which do not have seperate memory address spaces.

Oops - Bootloader optimizations to GetDescriptor() don't work, as the Configuration Descriptor's header does not contain the full length of the descriptor, breaking full enumeration.

Fixed Remote Wakeup broken on the AVRs due to the mechanism only operating when the SUSPI bit is set (thanks to Holger Steinhaus).

Remove redundant setting of UIDE in the AVR8 and AVR32 USB controller drivers.

Implemented on-demand PLL clock generation for the U4, U6 and U7 series USB AVRs when automatic PLL mode is specified.

Updated the software USART code in the XPLAIN Bridge application so that the incomming bits are sampled at their mid-point instead of starting point, to give maximum reliability (thanks to Anton).

Add support for the inbuilt unique serial numbers in the UC3A3 and UC3A4 models.

Add structure padding to the appropriate descriptor structures to maintain correct alignments on larger architectures.

Fix EVK1101 swapped joystick Right/Down masks.

Endpoint_ResetFIFO() renamed to Endpoint_ResetEndpoint(), to be consistent with the Pipe_ResetPipe() function name.

Fix undefined error in Pipe_UC3B.h.

Add missing migration notes.

Add in USB_INT_RegisterHandlers() internal function to register the interrupt handler routines used by LUFA. Add dummy loads after clearing the interrupt lines according to the datasheet.

Add in temporary global interrupts enable/disable macros.

Changed over the AVR8 USB controller interrupt management macros to be inlined functions instead, for better compile-time validity checking and to keep the per-architecture source files as uniform as possible.

Removed Pipe_ClearErrorFlags(), pipe error flags are now automatically cleared when Pipe_ClearError() is called.

More UC3B architecture porting.

Added TWI baud rate prescaler and bit length parameters to the TWI_Init() function (thanks to Thomas Herlinghaus).

More updates to remove architecture-specific comments from the documentation, alter USBMode.h preprocessor logic to support future architectures more easily.

Start update of documentation to support possible multiple architectures in the future - alter \file documentation to automatically copy in the module documentation where possible.

Initial restructuring of the core USB driver module to support multiple architectures in the future.

Add new ARCH option to the makefiles to (eventually) specify the target device architecture. Update non-usb peripheral drivers to reflect future multiple architecture support.

Added HID class bootloader, compatible with a modified version of the command line Teensy loader from PJRC.com.

Change bootloader makefiles to automatically compute the bootloader starting address from a flash size and bootloader section size, expressed in KB.

Fixed programming errors in the AVRISP-MKII project when the programming packet is a round multiple of the endpoint bank  size under avrdude (thanks to Steffan Woltjer).

Renamed the PRNT_Host_SendString(), CDC_Host_SendString() and CDC_Device_SendString() functions to *_SendData(), and added new versions of the *_SendString() routines that expect a null terminated string instead.

Added new Serial_SendData() function to the Serial driver.

Removed SerialStream module, rolled functionality into the base USART Serial peripheral driver instead through the new Serial_CreateStream() and Serial_CreateBlockingStream() methods.

Renamed the Serial byte send/receive functions to remain consistent with the CDC driver's byte functions.

Altered the serial byte receive function to make it non-blocking.

Add new HID_DESCRIPTOR_VENDOR() macro, change over all projects and Device ClassDriver demos to use it.

Fix reversed byte ordering of multi-byte HID data.

Added support to the HID parser for extended USAGE items that contain the usage page as well as the usage index.

Removed the HID_IOF_NON_VOLATILE and HID_IOF_VOLATILE flags from HID INPUT items where the flag is invalid. Changed over HID OUTPUT items to use HID_IOF_NON_VOLATILE.

Change over MagStripe project to use HID_DESCRIPTOR_KEYBOARD() for its HID report. Change over MouseHostDevice demo to use HID_DESCRIPTOR_MOUSE() for its HID report.