3  *  This file contains special DoxyGen information for the generation of the main page and other special
 
   4  *  documentation pages. It is not a project source file.
 
   7  /** \page Page_ChangeLog Project Changelog
 
   9   *  \section Sec_ChangeLogXXXXXX Version XXXXXX
 
  12   *  - Added new class drivers and matching demos to the library for rapid application development
 
  13   *  - Added incomplete device and host mode demos for later enhancement
 
  14   *  - Error status LEDs shown when device endpoint configuration fails to complete in all demos and projects
 
  15   *  - Added new USB_Host_SetDeviceConfiguration() convenience function for easy configuration selection of devices while in USB
 
  17   *  - Added new USB_Host_ClearPipeStall() convenience function to clear a stall condition on an attached device's endpoint
 
  18   *  - Added new USB_Host_GetDeviceDescriptor() convenience function to retrieve the attached device's Device descriptor
 
  19   *  - Added USB Missle Launcher project, submitted by Dave Fletcher
 
  20   *  - Added new USE_INTERNAL_SERIAL define for using the unique serial numbers in some AVR models as the USB device's serial number,
 
  21   *    added NO_INTERNAL_SERIAL compile time option to turn off new serial number reading code
 
  22   *  - Added new DATAFLASH_CHIP_MASK() macro to the Dataflash driver, which returns the Dataflash select mask for the given chip index
 
  23   *  - Updated MassStorage device block write routines to use ping-pong Dataflash buffering to increase throughput by around 30%
 
  24   *  - Added new HOST_STATE_WaitForDeviceRemoval host state machine state for non-blocking disabling of device communications until the
 
  25   *    device has been removed (for use when an error occurs or communications with the device have completed)
 
  26   *  - Added new FAST_STREAM_TRANSFERS compile time option for faster stream transfers via multiple bytes copied per stream loop
 
  27   *  - Added stdio stream demo code to the low-level CDC demo, to show how to create standard streams out of the virtual serial ports
 
  28   *  - Added new EEPROM and FLASH buffer versions of the Endpoint and Pipe stream functions
 
  29   *  - Added new USE_FLASH_DESCRIPTORS and TOTAL_NUM_CONFIGURATIONS compile time options
 
  30   *  - Added support for the new ATMEGA32U2, ATMEGA16U2 and ATMEGA8U2 AVR models
 
  33   *  - Deprecated psuedo-scheduler and removed dynamic memory allocator from the library (first no longer needed and second unused)
 
  34   *  - Low level API MIDI device demo no longer blocks if a note change event is sent while the endpoint is not ready
 
  35   *  - Internal per-device preprocessing conditions changed to per-device series rather than per controller group for finer-grain
 
  37   *  - Pipe_GetErrorFlags() now returns additional error flags for overflow and underflow errors
 
  38   *  - Extended USB_GetDeviceConfigDescriptor() routine to require the configuration number within the device to fetch
 
  39   *  - Pipe stream functions now automatically set the correct pipe token, so that bidirectional pipes can be used
 
  40   *  - Pipe_ConfigurePipe() now automatically defaults IN pipes to accepting infinite IN requests, this can still be changed by calling
 
  41   *    the existing Pipe_SetFiniteINRequests() function
 
  42   *  - Dataflash_WaitWhileBusy() now always ensures that the dataflash is ready for the next command immediately after returning,
 
  43   *    no need to call Dataflash_ToggleSelectedChipCS() afterwards
 
  44   *  - Changed F_CLOCK entries in project makefiles to alias to F_CPU by default, as this is the most common case
 
  45   *  - The device-mode CALLBACK_USB_GetDescriptor() function now has an extra parameter so that the memory space in which the requested
 
  46   *    descriptor is located can be specified. This means that descriptors can now be located in multiple memory spaces within a device.
 
  47   *  - Host mode demos now use sane terminal escape codes, so that text is always readable and events/program output is visually distinguished
 
  48   *    from oneanother using foreground colours
 
  51   *  - Changed bootloaders to use FLASHEND rather than the existence of RAMPZ to determine if far FLASH pointers are needed to fix
 
  52   *    bootloaders on some of the USB AVR devices where avr-libc erronously defines RAMPZ
 
  53   *  - Fixes to MassStorageHost for better device compatibility (increase command timeout, change MassStore_WaitForDataReceived()
 
  54   *    to only unfreeze and check one data pipe at a time) to prevent incorrect device enumerations and freezes while trasferring data
 
  55   *  - Make Pipe_ConfigurePipe() mask the given endpoint number against PIPE_EPNUM_MASK to ensure the endpoint IN direction bit is
 
  56   *    cleared to prevent endpoint type corruption
 
  57   *  - Fix documentation mentioning Pipe_GetCurrentToken() function when real name is Pipe_GetPipeToken()
 
  58   *  - Fixed ADC driver for the ATMEGA32U4 and ATMEGA16U4 (thanks to Opendous Inc.)
 
  59   *  - Fixed CDCHost demo unfreezing the pipes at the point of configuration, rather than use
 
  60   *  - Fixed MassStorage demo not clearing the reset flag when a Mass Storage Reset is issued while not processing a command
 
  61   *  - Fixed USB_Host_SendControlRequest() not re-suspending the USB bus when initial device ready-wait fails
 
  62   *  - Fixed USB Pad regulator not being disabled on some AVR models when the USB_OPT_REG_DISABLED option is used
 
  63   *  - Fixed Host mode to Device mode UID change not causing a USB Disconnect event when a device was connected
 
  64   *  - Fixed Mouse/Keyboard demos not performing the correct arithmetic on the Idle period at the right times (thanks to Brian Dickman)
 
  65   *  - Fixed GenericHID failing HID class tests due to incorrect Logical Minimum and Logical Maximum values (thanks to Søren Greiner)
 
  66   *  - Fixed incorrect PIPE_EPNUM_MASK mask causing pipe failures on devices with endpoint addresses of 8 and above (thanks to John Andrews)
 
  69   *  \section Sec_ChangeLog090605 Version 090605
 
  71   *  - Fixed bug in RNDISEthernet and DualCDC demos not using the correct USB_ControlRequest structure for control request data
 
  72   *  - Fixed documentation showing incorrect USB mode support on the supported AVRs list
 
  73   *  - Fixed RNDISEthernet not working under Linux due to Linux requiring an "optional" RNDIS request which was unhandled
 
  74   *  - Fixed Mouse and Keyboard device demos not acting in accordance with the HID specification for idle periods (thanks to Brian Dickman)
 
  75   *  - Removed support for endpoint/pipe non-control interrupts; these did not act in the way users expected, and had many subtle issues
 
  76   *  - Fixed Device Mode not handling Set Feature and Clear Feature Chapter 9 requests that are addressed to the device (thanks to Brian Dickman)
 
  77   *  - Moved control endpoint interrupt handling into the library itself, enable via the new INTERRUPT_CONTROL_ENDPOINT token
 
  78   *  - Fixed CDCHost not clearing configured pipes and resetting configured pipes mask when a partially enumerated invalid CDC
 
  79   *    interface is skipped
 
  80   *  - Clarified the size of library tokens which accept integer values in the Compile Time Tokens page, values now use the smallest datatype
 
  81   *    inside the library that is able to hold their defined value to save space
 
  82   *  - Removed DESCRIPTOR_ADDRESS() macro as it was largely supurflous and only served to obfuscate code
 
  83   *  - Rewritten event system to remove all macros, to make user code clearer
 
  84   *  - Fixed incorrect ENDPOINT_EPNUM_MASK mask preventing endpoints above EP3 from being selected (thanks to Jonathan Oakley)
 
  85   *  - Removed STREAM_CALLBACK() macro - callbacks now use regular function definitions to clarify user code
 
  86   *  - Removed DESCRIPTOR_COMPARATOR() macro - comparators should now use regular function definitions to clarify user code
 
  87   *  - USB_IsConnected is now cleared before the USB_Disconnect() event is fired in response to VBUS being removed
 
  88   *  - Fixed incorrect PID value being used in the USBtoSerial project (thanks to Phill)
 
  89   *  - Deleted StdDescriptors.c, renamed USB_GetDescriptor() to CALLBACK_USB_GetDescriptor, moved ConfigDescriptor.c/.h from the
 
  90   *    LUFA/Drivers/USB/Class/ directory to LUFA/Drivers/USB/HighLevel/ in preperation for the new USB class APIs
 
  91   *  - Moved out each demos' functionality library files (e.g. Ring Buffer library) to /Lib directories for a better directory structure
 
  92   *  - Removed Tx interrupt from the USBtoSerial demo; now sends characters via polling to ensure more time for the Rx interrupt
 
  95   *  \section Sec_ChangeLog090510 Version 090510
 
  97   *  - Added new GenericHIDHost demo
 
  98   *  - Corrections to the KeyboardHost and MouseHost demos' pipe handling to freeze and unfreeze the data pipes at the point of use
 
  99   *  - KeyboardHost, MouseHost and GenericHIDHost demos now save and restore the currently selected pipe inside the pipe ISR
 
 100   *  - Changed GenericHID device demo to use the LUFA scheduler, added INTERRUPT_DATA_ENDPOINT and INTERRUPT_CONTROL_ENDPOINT compile
 
 102   *  - All comments in the library, bootloaders, demos and projects have now been spell-checked and spelling mistakes/typos corrected
 
 103   *  - Added new PIMA_DATA_SIZE() define to the Still Image Host demo
 
 104   *  - Add call to MassStore_WaitForDataReceived() in MassStore_GetReturnedStatus() to ensure that the CSW has been received in the
 
 105   *    extended MSC timeout period before continuing, to prevent long processing delays from causing the MassStore_GetReturnedStatus()
 
 106   *    to early-abort (thanks to Dmitry Maksimov)
 
 107   *  - Move StdRequestType.h, StreamCallbacks.h, USBMode.h from the LowLevel USB driver directory to the HighLevel USB driver directory,
 
 108   *    where they are more suited
 
 109   *  - Removed all binary constants and replaced with decimal or hexadecimal constants so that unpatched GCC compilers can still build the
 
 110   *    code without having to be itself patched and recompiled first
 
 111   *  - Added preprocessor checks and documentation to the bootloaders giving information about missing SIGNATURE_x defines due to
 
 112   *    outdated avr-libc versions.
 
 113   *  - Added support to the CDCHost demo for devices with multiple CDC interfaces which are not the correct ACM type preceding the desired
 
 115   *  - Fixed GenericHID demo not starting USB and HID management tasks when not using interrupt driven modes (thanks to Carl Kjeldsen)
 
 116   *  - Fixed RNDISEthenet demo checking the incorrect message field for packet size constraints (thanks to Jonathan Oakley)
 
 117   *  - Fixed WriteNextReport code in the GenericHIDHost demo using incorrect parameter types and not selecting the correct endpoint
 
 118   *  - Adjusted sample CTC timer calculations in the AudioOutput and AudioInput demos to match the CTC calculations in the AVR datasheet,
 
 119   *    and to fix instances where rounding caused the endpoint to underflow (thanks to Robin Theunis)
 
 120   *  - The USB_Host_SendControlRequest() function no longer automatically selects the Control pipe (pipe 0), so that other control type
 
 121   *    pipes can be used with the function
 
 122   *  - The USB Host management task now saves and restores the currently selected pipe before and after the task completes
 
 123   *  - Fixed GenericHIDHost demo report write routine incorrect for control type requests (thanks to Andrei Krainev)
 
 124   *  - Removed Endpoint_ClearCurrentBank() and Pipe_ClearCurrentBank() in favour of new Endpoint_ClearIN(), Endpoint_ClearOUT(),
 
 125   *    Pipe_ClearIN() and Pipe_ClearOUT() macros (done to allow for the detection of packets of zero length)
 
 126   *  - Renamed *_ReadWriteAllowed() macros to *_IsReadWriteAllowed() to remain consistent with the rest of the LUFA API
 
 127   *  - Endpoint_IsSetupReceived() macro has been renamed to Endpoint_IsSETUPReceived(), Endpoint_ClearSetupReceived() macro has been
 
 128   *    renamed to Endpoint_ClearSETUP(), the Pipe_IsSetupSent() macro has been renamed to Pipe_IsSETUPSent() and the
 
 129   *    Pipe_ClearSetupSent() macro is no longer applicable and should be removed - changes made to compliment the new endpoint and pipe
 
 130   *    bank management API
 
 131   *  - Updated all demos, bootloaders and projects to use the new endpoint and pipe management APIs (thanks to Roman Thiel from Curetis AG)
 
 132   *  - Updated library doxygen documentation, added groups, changed documentation macro functions to real functions for clarity
 
 133   *  - Removed old endpoint and pipe aliased read/write/discard routines which did not have an explicit endian specifier for clarity
 
 134   *  - Removed the ButtLoadTag.h header file, as no one used for its intended purpose anyway
 
 135   *  - Renamed the main Drivers/AT90USBXXX directory to Drivers/Peripheral, renamed the Serial_Stream driver to SerialStream
 
 136   *  - Fixed CDC and USBtoSerial demos freezing where buffers were full while still transmitting or receiving (thanks to Peter Hand)
 
 137   *  - Removed "Host_" section of the function names in ConfigDescriptor.h, as most of the routines can now be used in device mode on the
 
 139   *  - Renamed functions in the HID parser to have a "USB_" prefix and the acronym "HID" in the name
 
 140   *  - Fixed incorrect HID interface class and subclass values in the Mouse and KeyboardMouse demos (thanks to Brian Dickman)
 
 141   *  - Capitalised the "Descriptor_Search" and "Descriptor_Search_Comp" prefixes of the values in the DSearch_Return_ErrorCodes_t and
 
 142   *    DSearch_Comp_Return_ErrorCodes_t enums
 
 143   *  - Removed "ERROR" from the enum names in the endpoint and pipe stream error code enums
 
 144   *  - Renamed the USB_PowerOnErrorCodes_t enum to USB_InitErrorCodes_t, renamed the POWERON_ERROR_NoUSBModeSpecified enum value to
 
 145   *    USB_INITERROR_NoUSBModeSpecified
 
 146   *  - Renamed USB_PowerOnFail event to USB_InitFailure
 
 147   *  - Renamed OTG.h header functions to be more consistent with the rest of the library API
 
 148   *  - Changed over all deprecated GCC structure tag initializers to the standardized C99 format (thanks to Mike Alexander)
 
 149   *  - USB_HostRequest renamed to USB_ControlRequest, entire control request header is now read into USB_ControlRequest in Device mode
 
 150   *    rather than having the library pass only partially read header data to the application
 
 151   *  - The USB_UnhandledControlPacket event has had its parameters removed, in favour of accessing the new USB_ControlRequest structure
 
 152   *  - The Endpoint control stream functions now correctly send a ZLP to the host when less data than requested is sent
 
 153   *  - Fixed USB_RemoteWakeupEnabled flag never being set (the REMOTE WAKEUP Set Feature request was not being handled)
 
 154   *  - Renamed the FEATURELESS_CONTROL_ONLY_DEVICE compile-time token to CONTROL_ONLY_DEVICE
 
 155   *  - Endpoint configuration is now refined to give better output when all configurations have static inputs - removed the now useless
 
 156   *    STATIC_ENDPOINT_CONFIGURATION compile time token
 
 157   *  - Fixed SPI driver init function not clearing SPI2X bit when not needed
 
 158   *  - Fixed PREVENT ALLOW MEDIUM REMOVAL command issuing in the MassStorageHost demo using incorrect parameters (thanks to Mike Alex)
 
 159   *  - Fixed MassStorageHost demo broken due to an incorrect if statement test in MassStore_GetReturnedStatus()
 
 160   *  - Fixed reversed signature byte ordering in the CDC bootloader (thanks to Johannes Raschke)
 
 161   *  - Changed PIPE_CONTROLPIPE_DEFAULT_SIZE from 8 to 64 to try to prevent problems with faulty devices which do not respect the given
 
 162   *    wLength value when reading in the device descriptor
 
 163   *  - Fixed missing semicolon in the ATAVRUSBRF01 LED board driver code (thanks to Morten Lund)
 
 164   *  - Changed LED board driver code to define dummy LED masks for the first four board LEDs, so that user code can be compiled for boards
 
 165   *    with less than four LEDs without code modifications (thanks to Morten Lund)
 
 166   *  - Changed HWB board driver to Buttons driver, to allow for the support of future boards with more than one mounted GPIO button
 
 167   *  - Serial driver now correctly calculates the baud register value when in double speed mode
 
 168   *  - Init function of the Serial driver is now static inline to product smaller code for the common-case of static init values
 
 171   *  \section Sec_ChangeLog090401 Version 090401
 
 173   *  - Fixed MagStripe project configuration descriptor containing an unused (blank) endpoint descriptor
 
 174   *  - Incorporated makefile changes by Denver Gingerich to retain compatibility with stock (non-WinAVR) AVR-GCC installations
 
 175   *  - Fixed makefile EEPROM programming targets programming FLASH data in addition to EEPROM data
 
 176   *  - LUFA devices now enumerate correctly with LUFA hosts
 
 177   *  - Fixed Configuration Descriptor search routine freezing when a comparator returned a failure
 
 178   *  - Removed HID report item serial dump in the MouseHostWithParser and KeyboardHostWithParser - useful only for debugging, and
 
 179   *    slowed down the enumeration of HID devices too much
 
 180   *  - Increased the number of bits per track which can be read in the MagStripe project to 8192 when compiled for the AT90USBXXX6/7
 
 181   *  - Fixed KeyboardMouse demo discarding the wIndex value in the REQ_GetReport request
 
 182   *  - USBtoSerial demo now discards all Rx data when not connected to a USB host, rather than buffering characters for transmission
 
 183   *    next time the device is attached to a host.
 
 184   *  - Added new F_CLOCK compile time constant to the library and makefiles, to give the raw input clock (used to feed the PLL before any
 
 185   *    clock prescaling is performed) frequency, so that the PLL prescale mask can be determined
 
 186   *  - Changed stream wait timeout counter to be 16-bit, so that very long timeout periods can be set for correct communications with
 
 187   *    badly designed hosts or devices which greatly exceed the USB specification limits
 
 188   *  - Mass Storage Host demo now uses a USB_STREAM_TIMEOUT_MS of two seconds to maintain compatibility with poorly designed devices
 
 189   *  - Function attribute ATTR_ALWAYSINLINE renamed to ATTR_ALWAYS_INLINE to match other function attribute macro naming conventions
 
 190   *  - Added ATTR_ALWAYS_INLINE attribute to several key inlined library components, to ensure they are inlined in all circumstances
 
 191   *  - Removed SetSystemClockPrescaler() macro, the clock_prescale_set() avr-libc macro has been corrected in recent avr-libc versions
 
 192   *  - Fixed incorrect/missing control status stage transfers on demos, bootloaders and applications (thanks to Nate Lawson)
 
 193   *  - The NO_CLEARSET_FEATURE_REQUEST compile time token has been renamed to FEATURELESS_CONTROL_ONLY_DEVICE, and its function expanded
 
 194   *    to also remove parts of the Get Status chapter 9 request to further reduce code usage
 
 195   *  - Makefile updated to include output giving the currently selected BOARD parameter value
 
 196   *  - Board Dataflash driver now allows for dataflash ICs which use different shifts for setting the current page/byte address (thanks
 
 198   *  - Added DataflashManager_WriteBlocks_RAM() and DataflashManager_ReadBlocks_RAM() functions to the MassStorage demo, to allow for easy
 
 199   *    interfacing with a FAT library for dataflash file level access
 
 200   *  - Corrected CDC class bootloader to fix a few bugs, changed address counter to store x2 addresses for convenience
 
 201   *  - Fixed typos in the SPI driver SPI_SPEED_FCPU_DIV_64 and SPI_SPEED_FCPU_DIV_128 masks (thanks to Markus Zocholl)
 
 202   *  - Keyboard and Mouse device demos (normal, data interrupt and fully interrupt driven) combined into unified keyboard and mouse demos
 
 203   *  - Keyboard and Mouse host demos (normal and data interrupt driven) combined into unified keyboard and mouse demos
 
 204   *  - Removed AVRISP_Programmer project due to code quality concerns
 
 205   *  - Fixed CDC demo not sending an empty packet after each transfer to prevent the host from buffering incoming data
 
 206   *  - Fixed documentation typos and preprocessor checks relating to misspellings of the USE_RAM_DESCRIPTORS token (thanks to Ian Gregg)
 
 207   *  - Fixed USBTask.h not conditionally including HostChapter9.h only when USB_CAN_BE_HOST is defined (thanks to Ian Gregg)
 
 208   *  - Fixed incorrect ADC driver init register manipulation (thanks to Tobias)
 
 209   *  - Added new GenericHID device demo application
 
 210   *  - Fixed Still Image Host SImage_SendData() function not clearing the pipe bank after sending data
 
 213   *  \section Sec_ChangeLog090209 Version 090209
 
 215   *  - PWM timer mode in AudioOut demo changed to Fast PWM for speed
 
 216   *  - Updated Magstripe project to work with the latest hardware revision
 
 217   *  - Fixed library not responding to the BCERRI flag correctly in host mode, leading to device lockups
 
 218   *  - Fixed library handling Get Descriptor requests when not addressed as standard requests to the device or interface (thanks to
 
 220   *  - Fixed serious data corruption issue in MassStorage demo dataflash write routine
 
 221   *  - Added new NO_CLEARSET_FEATURE_REQUEST compile time token
 
 222   *  - USB task now restores previous global interrupt state after execution, rather than forcing global interrupts to be enabled
 
 223   *  - Fixed USB_DeviceEnumerationComplete event firing after each configuration change, rather than once after the initial configuration
 
 224   *  - Added ENDPOINT_DOUBLEBANK_SUPPORTED() macros to Endpoint.h, altered ENDPOINT_MAX_SIZE() to allow user to specify endpoint
 
 225   *  - ENDPOINT_MAX_ENDPOINTS changed to ENDPOINT_TOTAL_ENDPOINTS, PIPE_MAX_PIPES changed to PIPE_TOTAL_PIPES
 
 226   *  - Endpoint and Pipe non-control stream functions now ensure endpoint or pipe is ready before reading or writing
 
 227   *  - Changed Teensy bootloader to use a watchdog reset when exiting rather than a software jump
 
 228   *  - Fixed integer promotion error in MassStorage and MassStorageHost demos, corrupting read/write transfers
 
 229   *  - SPI_SendByte is now SPI_TransferByte, added new SPI_SendByte and SPI_ReceiveByte functions for fast one-way transfer
 
 230   *  - MassStorage demo changed to use new fast one-way SPI transfers to increase throughput
 
 231   *  - MassStorage handling of Mass Storage Reset class request improved
 
 232   *  - Altered MassStorage demo dataflash block read code for speed
 
 233   *  - Added USB_IsSuspended global flag
 
 234   *  - Simplified internal Dual Mode (OTG) USB library code to reduce code size
 
 235   *  - Extended stream timeout period to 100ms from 50ms
 
 236   *  - Mass Storage Host demo commands now all return an error code from the Pipe_Stream_RW_ErrorCodes_t enum
 
 237   *  - Added SubErrorCode parameter to the USB_DeviceEnumerationFailed event
 
 238   *  - VBUS drop interrupt now disabled during the manual-to-auto VBUS delivery handoff
 
 239   *  - Simplified low level backend so that device/host mode initialization uses the same code paths
 
 240   *  - Added workaround for faulty Mass Storage devices which do not implement the required GET_MAX_LUN request
 
 241   *  - Removed buggy Telnet application from the RNDIS demo
 
 242   *  - Moved Mass Storage class requests in the Mass Storage Host demo to wrapper functions in MassStoreCommands.c
 
 243   *  - Fixed incorrect SCSI command size value in the Request Sense command in MassStoreCommands.c
 
 244   *  - Added SetProtocol request to HID class non-parser Mouse and Keyboard demos to force devices to use the correct Boot Protocol
 
 245   *  - Added new "dfu" and "flip" programming targets to project makefiles
 
 246   *  - HID_PARSE_Sucessful enum member typo corrected to HID_PARSE_Successful
 
 247   *  - Changed COLLECTION item structures in the HID descriptor parser to include the collection's Usage Page value
 
 248   *  - Serial driver now sets Tx line as output, enables pullup on Rx line
 
 249   *  - Fixed smaller USB AVRs raising multiple connection and disconnection events when NO_LIMITED_CONTROLLER_CONNECT is disabled
 
 250   *  - Added HOST_DEVICE_SETTLE_DELAY_MS to give the host delay after a device is connected before it is enumerated
 
 251   *  - Fixed KeyboardHostWithParser demo linking against the wrong global variables
 
 252   *  - Completed doxygen documentation of remaining library bootloaders, demos and projects
 
 253   *  - Fixed incorrect bootloader start address in the TeensyHID bootloader
 
 254   *  - Added HWB button whole-disk ASCII dump functionality to MassStoreHost demo
 
 255   *  - Replaced printf_P(PSTR("%c"), {Variable}) calls with putchar(<Variable>) for speed and size savings
 
 256   *  - Serial driver now accepts baud rates over 16-bits in size, added double speed flag option
 
 257   *  - Fixed incorrect callback abort return value in Pipe.c
 
 258   *  - Added new flip-ee and dfu-ee makefile targets (courtesy of Opendous Inc.)
 
 259   *  - Removed reboot-on-disconnect code from the TeensyHID bootloader, caused problems on some systems
 
 260   *  - Fixed AudioOutput and AudioInput demos looping on the endpoint data, rather than processing a sample at a time and returning
 
 261   *    each time the task runs to allow for other tasks to execute
 
 262   *  - Added support for the Atmel ATAVRUSBRF01 board
 
 263   *  - Added AVRISP Programmer Project, courtesy of Opendous Inc.
 
 264   *  - Fixed CDC Host demo not searching through both CDC interfaces for endpoints
 
 265   *  - Fixed incorrect Product String descriptor length in the DFU class bootloader
 
 268   *  \section Sec_ChangeLog081224 Version 081224
 
 270   *  - MyUSB name changed to LUFA, the Lightweight USB Framework for AVRs
 
 271   *  - Fixed Mass Storage Host demo's MassStore_SendCommand() delay in the incorrect place
 
 272   *  - Fixed USBtoSerial demo not calling ReconfigureUSART() after a change in the line encoding
 
 273   *  - Fixed infinite loop in host mode Host-to-Device control transfers with data stages
 
 274   *  - HID report parser now supports devices with multiple reports in one interface via Report IDs
 
 275   *  - Fixed RZUSBSTICK board LED driver header incorrect macro definition order causing compile errors
 
 276   *  - Calling USB_Init() when the USB interface is already configured now forces a complete interface reset
 
 277   *    and re-enumeration - fixes MyUSB DFU bootloader not switching to app code correctly when soft reset used
 
 278   *  - Fixed "No newline at end of file" warning when stream callbacks are enabled
 
 279   *  - DFU bootloader now uses fixed signature bytes per device, rather than reading them out dynamically for size
 
 280   *  - Added new FIXED_CONTROL_ENDPOINT_SIZE and USE_SINGLE_DEVICE_CONFIGURATION switches to statically define certain values to
 
 281   *    reduce compiled binary size
 
 282   *  - Added new NO_LIMITED_CONTROLLER_CONNECT switch to prevent the library from trying to determine bus connection
 
 283   *    state from the suspension and wake up events on the smaller USB AVRs
 
 284   *  - Added summary of all library compile time tokens to the documentation
 
 285   *  - Added overview of the LUFA scheduler to the documentation
 
 286   *  - Removed MANUAL_PLL_CONTROL compile time token, replaced with a mask for the USB_Init() Options parameter
 
 287   *  - CDC bootloader now uses the correct non-far or far versions of the pgm_* functions depending on if RAMPZ is defined
 
 288   *  - Doxygen documentation now contains documentation on all the projects, bootloaders and most demos included with the library
 
 289   *  - CDC bootloader now runs user application when USB disconnected rather than waiting for a hard reset
 
 290   *  - MouseHostWithParser and KeyboardHostWithParser now support multiple-report devices
 
 291   *  - RNDIS demo can now close connections correctly using the new TCP_APP_CLOSECONNECTION() macro - used in Webserver  
 
 292   *  - Fixed the DFU bootloader, no longer freezes up when certain files are programmed into an AVR, made reading/writing faster
 
 293   *  - Fixed mouse/joystick up/down movements reversed - HID mouse X/Y coordinates use a left-handed coordinate system, not a normal 
 
 294   *    right-handed system
 
 295   *  - Added stub code to the CDC and USBtoSerial demos showing how to read and set the RS-232 handshake lines - not currently used in
 
 296   *    the demos, but the example code and supporting defines are now in place
 
 297   *  - Interrupts are now disabled when processing a control request in device mode, to avoid exceeding the strict control request
 
 298   *    timing requirements.
 
 299   *  - All demos now use a central StatusUpdate() function rather than direct calls to the board LED functions, so that the demos can
 
 300   *    easily be altered to show different LED combinations (or do something else entirely) as the demo's status changes
 
 301   *  - Removed LED commands from the CDC bootloader, unused by most AVR910 programming software
 
 302   *  - Fixed RNDIS demo ICMP ping requests echoing back incorrect data
 
 303   *  - Added DHCP server code to RNDIS demo, allowing for hands-free auto configuration on any PC
 
 304   *  - Fixed DFU bootloader PID value for the ATMEGA16U4 AVR
 
 305   *  - Endpoint and Pipe configuration functions now return an error code indicating success or failure
 
 306   *  - USB Reset in device mode now resets and disables all device endpoints
 
 307   *  - Added intermediate states to the host mode state machine, reducing the USB task blocking time to no more than 1ms explicitly per
 
 308   *    invocation when in host mode
 
 309   *  - Added support for the ATMEGA32U6 microcontroller
 
 310   *  - Added STATIC_ENDPOINT_CONFIGURATION compile time option, enabled in the bootloaders to minimize space usage
 
 311   *  - Removed redundant code from the USB device GetStatus() chapter 9 processing routine
 
 312   *  - Added new TeensyHID bootloader, compatible with the Teensy HID protocol (http://www.pjrc.com/teensy/)
 
 313   *  - Versions are now numbered by release dates, rather than arbitrary major/minor revision numbers
 
 314   *  - USB_RemoteWakeupEnabled is now correctly set and cleared by SetFeature and ClearFeature requests from the host
 
 315   *  - Changed prototype of GetDescriptor, so that it now returns the descriptor size (or zero if the descriptor doesn't exist)
 
 316   *    rather than passing the size back to the caller through a parameter and returning a boolean
 
 319   *  \section Sec_ChangeLog153 Version 1.5.3 - Released 2nd October, 2008
 
 321   *  - Fixed CDC bootloader using pgmspace macros for some descriptors inappropriately
 
 322   *  - Updated all Mouse and Keyboard device demos to include boot protocol support (now works in BIOS)
 
 323   *  - Renamed bootloader directories to remove spaces, which were causing build problems on several OSes
 
 324   *  - Removed serial number strings from all but the MassStore demo where it is required - users were not
 
 325   *    modifying the code to either omit the descriptor or use a unique serial per device causing problems
 
 326   *    when multiple units of the same device were plugged in at the same time
 
 327   *  - AudioOutput and AudioInput demos now correctly silence endpoints when not enabled by the host
 
 328   *  - Added KeyboardMouse demo (Keyboard and Mouse functionality combined into a single demo)
 
 329   *  - Added DriverStubs directory to house board level driver templates, to make MyUSB compatible custom board
 
 330   *    driver creation easier
 
 331   *  - Extended MassStorage demo to support multiple LUNs, 2 by default
 
 332   *  - Fixed incorrect device address mask, preventing the device from enumerating with addresses larger than 63
 
 333   *  - Fixed incorrect data direction mask in the GetStatus standard request, preventing it from being handled
 
 334   *  - Fixed incorrect GetStatus standard request for endpoints, now returns the endpoint STALL status correctly
 
 335   *  - Added in new USB_RemoteWakeupEnabled and USB_CurrentlySelfPowered flags rather than using fixed values
 
 336   *  - Added DualCDC demo to demonstrate the use of Interface Association Descriptors
 
 337   *  - Added pipe NAK detection and clearing API
 
 338   *  - Added pipe status change (NAK, STALL, etc.) interrupt API
 
 339   *  - Fixed MassStorageHost demo so that it no longer freezes randomly when issuing several commands in a row
 
 340   *  - Host demos configuration descriptor routines now return a unique error code when the returned data does
 
 341   *    not have a valid configuration descriptor header
 
 342   *  - Added Endpoint_WaitUntilReady() and Pipe_WaitUntilReady() functions
 
 343   *  - Stream functions now have software timeouts, timeout period can be set by the USB_STREAM_TIMEOUT_MS token
 
 344   *  - All demos now pass the USB.org automated Chapter 9 device compliance tests
 
 345   *  - All HID demos now pass the USB.org automated HID compliance tests
 
 346   *  - Polling interval of the interrupt endpoint in the CDC based demos changed to 0xFF to fix problems on Linux systems
 
 347   *  - Changed stream functions to accept a new callback function, with NO_STREAM_CALLBACKS used to disable all callbacks
 
 348   *  - Mass Storage demo dataflash management routines changed to use the endpoint stream functions             
 
 349   *  - Added AVRStudio project files for each demo in addition to the existing Programmer's Notepad master project file
 
 350   *  - Re-added call to ReconfigureUSART() in USBtoSerial SetLineCoding request, so that baud rate changes
 
 351   *    are reflected in the hardware (change was previously lost)
 
 354   *  \section Sec_ChangeLog152 Version 1.5.2 - Released 31st July, 2008
 
 356   *  - Fixed SwapEndian_32() function in Common.h so that it now works correctly (wrong parameter types)
 
 357   *  - Updated RNDIS demo - notification endpoint is no longer blocking so that it works with faulty Linux RNDIS
 
 358   *    implementations (where the notification endpoint is ignored in favour of polling the control endpoint)
 
 359   *  - Fixed incorrect Vendor Description string return size in RNDIS demo for the OID_GEN_VENDOR_DESCRIPTION OID token
 
 360   *  - Added very basic TCP/IP stack and HTTP/TELNET servers to RNDIS demo
 
 361   *  - Fixed DFU bootloader exit causing programming software to complain about failed writes
 
 362   *  - Fixed DFU bootloader EEPROM programming mode wiping first flash page
 
 363   *  - Fixed Clear/Set Feature device standard request processing code (fixing MassStorage demo in the process)
 
 364   *  - Added support for the ATMEGA16U4 AVR microcontroller
 
 365   *  - Library licence changed from LGPLv3 to MIT license
 
 368   *  \section Sec_ChangeLog151 Version 1.5.1 - Released 31st July, 2008
 
 370   *  - Changed host demos to enable the host function task on the firing of the USB_DeviceEnumerationComplete event
 
 371   *    rather than the USB_DeviceAttached event
 
 372   *  - HID Usage Stack now forcefully cleared after an IN/OUT/FEATURE item has been completely processed to remove
 
 373   *    any referenced but not created usages
 
 374   *  - Changed USB_INT_DisableAllInterrupts() and USB_INT_ClearAllInterrupts(), USB_Host_GetNextDescriptorOfType(),
 
 375   *    USB_Host_GetNextDescriptorOfTypeBefore(), USB_Host_GetNextDescriptorOfTypeAfter() to normal functions (from inline)
 
 376   *  - Fixed USBtoSerial demo not sending data, only receiving
 
 377   *  - Fixed main makefile to make all by default, fixed MagStripe directory case to prevent case-sensitive path problems
 
 378   *  - ConfigDescriptor functions made normal, instead of static inline
 
 379   *  - Pipe/Endpoint *_Ignore_* functions changed to *_Discard_*, old names still present as aliases
 
 380   *  - Fixed ENDPOINT_MAX_SIZE define to be correct on limited USB controller AVRs
 
 381   *  - Changed endpoint and pipe size translation routines to use previous IF/ELSE IF cascade code, new algorithmic
 
 382   *    approach was buggy and caused problems
 
 383   *  - Bootloaders now compile with -fno-inline-small-functions option to reduce code size
 
 384   *  - Audio demos now use correct endpoint sizes for full and limited controller USB AVRs, double banking in all cases
 
 385   *    to be in line with the specification (isochronous endpoints MUST be double banked)
 
 386   *  - Added Interface Association descriptor to StdDescriptors.h, based on the relevant USB2.0 ECN
 
 387   *  - Fixed MIDI demo, corrected Audio Streaming descriptor to follow the MIDI-specific AS structure
 
 388   *  - Fixed HID class demo descriptors so that the HID interface's protocol is 0x00 (required for non-boot protocol HID
 
 389   *    devices) to prevent problems on hosts expecting the boot protocol functions to be supported
 
 390   *  - Added read/write control stream functions to Endpoint.h
 
 391   *  - Fixed AudioOut demo not setting port pins to inputs on USB disconnect properly
 
 392   *  - Added RNDISEthernet demo application
 
 395   *  \section Sec_ChangeLog150 Version 1.5.0 - Released 10 June, 2008
 
 397   *  - Fixed MIDI demo, now correctly waits for the endpoint to be ready between multiple note messages
 
 398   *  - Added CDC Host demo application
 
 399   *  - Added KeyboardFullInt demo application
 
 400   *  - Endpoint and Pipe creation routines now mask endpoint/pipe size with the size mask, to remove transaction
 
 401   *    size bits not required for the routines (improves compatibility with devices)
 
 402   *  - Fixed AudioInput demo - now correctly sends sampled audio to the host PC
 
 403   *  - Fixed AudioOutput demo once more -- apparently Windows requires endpoint packets to be >=192 bytes
 
 404   *  - Shrunk round-robbin scheduler code slightly via the use of struct pointers rather than array indexes
 
 405   *  - Fixed off-by-one error when determining if the Usage Stack is full inside the HID Report parser
 
 406   *  - Renamed Magstripe.h to MagstripeHW.h and moved driver out of the library and into the MagStripe demo folder
 
 407   *  - Added preprocessor checks to enable C linkage on the library components when used with a C++ compiler
 
 408   *  - Added Still Image Host demo application
 
 409   *  - The USB device task now restores the previously selected endpoint, allowing control requests to be transparently
 
 410   *    handled via interrupts while other endpoints are serviced through polling
 
 411   *  - Fixed device signature being sent in reverse order in the CDC bootloader
 
 412   *  - Host demos now have a separate ConfigDescriptor.c/.h file for configuration descriptor processing
 
 413   *  - HostWithParser demos now have a separate HIDReport.c/.h file for HID report processing and dumping
 
 414   *  - Removed non-mandatory commands from MassStorage demo to save space, fixed SENSE ResponseCode value
 
 415   *  - CDC demos now send empty packets after sending a full one to prevent buffering issues on the host
 
 416   *  - Updated demo descriptors to use VID/PID values donated by Atmel
 
 417   *  - Added DoxyGen documentation to the source files
 
 418   *  - Fixed Serial_IsCharRecieved() definition, was previously reversed
 
 419   *  - Removed separate USB_Descriptor_Language_t descriptor, USB_Descriptor_String_t is used instead
 
 420   *  - Removed unused Device Qualifier descriptor structure
 
 421   *  - Renamed the USB_CreateEndpoints event to the more appropriate USB_ConfigurationChanged
 
 422   *  - Fixed MassStorageHost demo reading in the block data in reverse
 
 423   *  - Removed outdated typedefs in StdRequestType.h, superseded by the macro masks
 
 424   *  - Corrected OTG.h is now included when the AVR supports both Host and Device modes, for creating OTG products
 
 425   *  - USB_DeviceEnumerationComplete event is now also fired when in device mode and the host has finished its enumeration
 
 426   *  - Interrupt driven demos now properly restore previously selected endpoint when ISR is complete
 
 427   *  - USB_HOST_TIMEOUT_MS is now overridable in the user project makefile to a custom fixed timeout value
 
 428   *  - Renamed USB_Host_SOFGeneration_* macros to more friendly USB_Host_SuspendBus(), USB_Host_ResumeBus()
 
 429   *    and USB_Host_IsBusSuspended()
 
 430   *  - Renamed *_*_Is* macros to *_Is* to make all flag checking macros consistent, Pipe_SetInterruptFreq() is now
 
 431   *    Pipe_SetInterruptPeriod() to use the correct terminology
 
 432   *  - UnicodeString member of USB_Descriptor_String_t struct changed to an ordinary int array type, so that the GCC
 
 433   *    Unicode strings (prefixed with an L before the opening quotation mark) can be used instead of explicit arrays
 
 434   *    of ASCII characters
 
 435   *  - Fixed Endpoint/Pipes being configured incorrectly if the maximum endpoint/pipe size for the selected USB AVR
 
 436   *    model was given as the bank size
 
 437   *  - HID device demos now use a true raw array for the HID report descriptor rather than a struct wrapped array
 
 438   *  - Added VERSION_BCD() macro, fixed reported HID and USB version numbers in demo descriptors
 
 439   *  - Cleaned up GetDescriptor device chapter 9 handler function
 
 440   *  - Added GET_REPORT class specific request to HID demos to make them complaint to the HID class
 
 441   *  - Cleaned up setting of USB_IsInitialized and USB_IsConnected values to only when needed
 
 442   *  - Removed Atomic.c and ISRMacro.h; the library was already only compatible with recent avr-lib-c for other reasons
 
 443   *  - All demos and library functions now use USB standardized names for the USB data (bRequest, wLength, etc.)
 
 444   *  - Added USE_NONSTANDARD_DESCRIPTOR_NAMES token to switch back to the non-standard descriptor element names
 
 447   *  \section Sec_ChangeLog141 Version 1.4.1 - Released 5 May, 2008
 
 449   *  - Enhanced KeyboardWithParser demo, now prints out pressed alphanumeric characters like the standard demo
 
 450   *  - Fixed MassStorage demo, read/writes using non mode-10 commands now work correctly
 
 451   *  - Corrected version number in Version.h
 
 454   *  \section Sec_ChangeLog140 Version 1.4.0 - Released 5 May, 2008
 
 456   *  - Added HID Report Parser API to the library
 
 457   *  - Added Mouse and Keyboard host demo applications, using the new HID report parser engine
 
 458   *  - Added MouseFullInt demo, which demonstrates a fully interrupt (including control requests) mouse device
 
 459   *  - Fixed incorrect length value in the audio control descriptor of the AudioOutput and AudioInput demos
 
 460   *  - Added MIDI device demo application to the library
 
 461   *  - Fixed problem preventing USB devices from being resumed from a suspended state
 
 462   *  - Added new CDC class bootloader to the library, based on the AVR109 bootloader protocol
 
 463   *  - Added header to each demo application indicating the mode, class, subclass, standards used and supported speed
 
 464   *  - Functions expecting endpoint/pipe numbers are no longer automatically masked against ENDPOINT_EPNUM_MASK or
 
 465   *    PIPE_PIPENUM_MASK - this should be manually added to code which requires it
 
 466   *  - Fixed DFU class bootloader - corrected frequency of flash page writes, greatly reducing programming time
 
 467   *  - Renamed AVR_HOST_GetDeviceConfigDescriptor() to USB_Host_GetDeviceConfigDescriptor() and AVR_HOST_GetNextDescriptor()
 
 468   *    to USB_Host_GetNextDescriptor()
 
 469   *  - Added new USB_Host_GetNextDescriptorOfTypeBefore() and USB_Host_GetNextDescriptorOfTypeAfter() routines
 
 470   *  - Moved configuration descriptor routines to MyUSB/Drivers/USB/Class/, new accompanying ConfigDescriptors.c file
 
 471   *  - Added new configuration descriptor comparator API for more powerful descriptor parsing, updated host demos to use the
 
 473   *  - Fixed MassStorageHost demo capacity printout, and changed data read/write mode from little-endian to the correct
 
 474   *    big-endian for SCSI devices
 
 475   *  - Fixed macro/function naming consistency; USB_HOST is now USB_Host, USB_DEV is now USB_Device
 
 476   *  - Added better error reporting to host demos
 
 477   *  - Added 10 microsecond delay after addressing devices in host mode, to prevent control stalls
 
 480   *  \section Sec_ChangeLog132 Version 1.3.2 - Released April 1st, 2008
 
 482   *  - Added call to ReconfigureUSART() in USBtoSerial SetLineCoding request, so that baud rate changes
 
 483   *    are reflected in the hardware
 
 484   *  - Fixed CDC and USBtoSerial demos - Stream commands do not work for control endpoints, and the 
 
 485   *    GetLineCoding request had an incorrect RequestType mask preventing it from being processed
 
 486   *  - Improved reliability of the USBtoSerial demo, adding a busy wait while the buffer is full
 
 487   *  - Device control endpoint size is now determined from the device's descriptors rather than being fixed
 
 488   *  - Separated out SPI code into new SPI driver in AT90USBXXX driver directory
 
 489   *  - Bootloader now returns correct PID for the selected USB AVR model, not just the AT90USB128X PID
 
 490   *  - Added support for the RZUSBSTICK board
 
 491   *  - Bicolour driver removed in favour of generic LEDs driver
 
 492   *  - Added support for the ATMEGA32U4 AVR
 
 493   *  - Added MANUAL_PLL_CONTROL compile time option to prevent the USB library from manipulating the PLL
 
 496   *  \section Sec_ChangeLog131 Version 1.3.1 - Released March 19th 2008
 
 498   *  - Fixed USB to Serial demo - class value in the descriptors was incorrect
 
 499   *  - Control endpoint size changed from 64 bytes to 8 bytes to save on USB FIFO RAM and to allow low
 
 500   *    speed mode devices to enumerate properly
 
 501   *  - USB to Serial demo data endpoints changed to dual-banked 16 byte to allow the demo to work
 
 502   *    on USB AVRs with limited USB FIFO RAM
 
 503   *  - Changed demo endpoint numbers to use endpoints 3 and 4 for double banking, to allow limited
 
 504   *    USB device controller AVRs (AT90USB162, AT90USB82) to function correctly
 
 505   *  - Updated Audio Out demo to use timer 1 for AVRs lacking a timer 3 for the PWM output
 
 506   *  - Fixed incorrect USB_DEV_OPT_HIGHSPEED entry in the Mass Storage device demo makefile
 
 507   *  - Optimized Mass Storage demo for a little extra transfer speed
 
 508   *  - Added LED indicators to the Keyboard demo for Caps Lock, Num Lock and Scroll Lock
 
 509   *  - Added Endpoint_Read_Stream, Endpoint_Write_Stream, Pipe_Read_Stream and Pipe_Write_Stream functions
 
 510   *    (including Big and Little Endian variants)
 
 511   *  - Made Dataflash functions inline for speed, removed now empty Dataflash.c driver file
 
 512   *  - Added new SetSystemClockPrescaler() macro (thanks to Joerg Wunsch)
 
 513   *  - Fixed Endpoint_ClearStall() to function correctly on full USB controller AVRs (AT90USBXXX6/7)
 
 514   *  - Endpoint_Setup_In_Clear() and Endpoint_Setup_Out_Clear() no longer set FIFOCON, in line with the
 
 515   *    directives in the datasheet
 
 516   *  - Fixed PLL prescaler defines for all AVR models and frequencies
 
 517   *  - Fixed ENDPOINT_INT_IN and ENDPOINT_INT_OUT definitions
 
 518   *  - Added interrupt driven keyboard and mouse device demos
 
 519   *  - Combined USB_Device_ClearFeature and USB_Device_SetFeature requests into a single routine for code
 
 521   *  - Added missing Pipe_GetCurrentPipe() macro to Pipe.h
 
 524   *  \section Sec_ChangeLog130 Version 1.3.0 - Released March 7th 2008
 
 526   *  - Unnecessary control endpoint config removed from device mode
 
 527   *  - Fixed device standard request interpreter accidentally processing some class-specific requests
 
 528   *  - Added USE_RAM_DESCRIPTORS and USE_EEPROM_DESCRIPTORS compile time options to instruct the library
 
 529   *    to use descriptors stored in RAM or EEPROM rather than flash memory
 
 530   *  - All demos now disable watchdog on startup, in case it has been enabled by fuses or the bootloader
 
 531   *  - USB_DEV_OPT_LOWSPEED option now works correctly
 
 532   *  - Added ability to set the USB options statically for a binary size reduction via the USE_STATIC_OPTIONS
 
 533   *    compile time define
 
 534   *  - USB_Init no longer takes a Mode parameter if compiled for a USB device with no host mode option, or
 
 535   *    if forced to a particular mode via the USB_HOST_ONLY or USB_DEVICE_ONLY compile time options
 
 536   *  - USB_Init no longer takes an Options parameter if options statically configured by USE_STATIC_OPTIONS
 
 537   *  - Endpoint_Ignore_* and Pipe_Ignore_* made smaller by making the dummy variable non-volatile so that the
 
 538   *    compiler can throw away the result more efficiently
 
 539   *  - Added in an optional GroupID value to each scheduler entry, so that groups of tasks can once again be
 
 540   *    controlled by the new Scheduler_SetGroupTaskMode() routine
 
 541   *  - Added support for AT90USB162 and AT90USB82 AVR models
 
 542   *  - Added support for the STK525 and STK526 boards
 
 543   *  - Added support for custom board drivers to be supplied by selecting the board type as BOARD_USER, and
 
 544   *    placing board drivers in {Application Directory}/Board/
 
 545   *  - PLL is now stopped and USB clock is frozen when detached from host in device mode, to save power
 
 546   *  - Joystick defines are now in synch with the schematics - orientation will be rotated for the USBKEY
 
 547   *  - Fixed USB_DEV_IsUSBSuspended() - now checks the correct register
 
 548   *  - Fixed data transfers to devices when in host mode
 
 549   *  - Renamed USB_DEV_OPT_HIGHSPEED to USB_DEV_OPT_FULLSPEED and USB_HOST_IsDeviceHighSpeed() to
 
 550   *    USB_HOST_IsDeviceFullSpeed() to be in line with the official USB speed names (to avoid confusion with
 
 551   *    the real high speed mode, which is unavailable on the USB AVRs)
 
 554   *  \section Sec_ChangeLog120 Version 1.2.0 - Released February 4th, 2008
 
 556   *  - Added USB_DeviceEnumerationComplete event for host mode
 
 557   *  - Added new Scheduler_Init routine to preprepare the scheduler, so that tasks can be started and
 
 558   *    stopped before the scheduler has been started (via Scheduler_Start)
 
 559   *  - Connection events in both Device and Host mode are now interrupt-driven, allowing the USB management
 
 560   *    task to be stopped when the USB is not connected to a host or device
 
 561   *  - All demos updated to stop the USB task when not in use via the appropriate USB events
 
 562   *  - Mass Storage Host demo application updated to function correctly with all USB flash disks
 
 563   *  - Mass Storage Host demo application now prints out the capacity and number of LUNs in the attached
 
 564   *    device, and prints the first block as hexadecimal numbers rather than ASCII characters
 
 565   *  - Endpoint and Pipe clearing routines now clear the Endpoint/Pipe interrupt and status flags
 
 566   *  - Shifted error handling code in the host enum state machine to a single block, to reduce code complexity
 
 567   *  - Added in DESCRIPTOR_TYPE, DESCRIPTOR_SIZE and DESCRIPTOR_CAST macros to make config descriptor processing
 
 568   *    clearer in USB hosts and DESCRIPTOR_ADDRESS for convenience in USB devices
 
 569   *  - Added in alloca macro to common.h, in case the user is using an old version of avr-lib-c missing the macro
 
 572   *  \section Sec_ChangeLog130 Version 1.1.0 - Released January 25th 2008
 
 574   *  - Fixed DCONNI interrupt being enabled accidentally after a USB reset
 
 575   *  - Fixed DDISCI interrupt not being disabled when a device is not connected
 
 576   *  - Added workaround for powerless pullup devices causing false disconnect interrupts
 
 577   *  - Added USB_DeviceEnumerationFailed event for Host mode
 
 578   *  - AVR_HOST_GetDeviceConfigDescriptor routine no longer modifies ConfigSizePtr if a valid buffer
 
 580   *  - Added ALLOCABLE_BYTES to DynAlloc, and added code to make the size of key storage variables
 
 581   *    dependant on size of memory parameters passed in via the user project's makefile
 
 582   *  - Fixed incorrect device reset routine being called in USBTask
 
 583   *  - Devices which do not connect within the standard 300mS are now supported
 
 584   *  - Removed incorrect ATTR_PURE from Scheduler_SetTaskMode(), which was preventing tasks from being
 
 585   *    started/stopped, as well as USB_InitTaskPointer(), which was breaking dual device/host USB projects
 
 586   *  - Changed scheduler to use the task name rather than IDs for setting the task mode, eliminating the
 
 587   *    need to have a task ID list
 
 588   *  - ID transistion interrupt now raises the appropriate device/host disconnect event if device attached
 
 589   *  - Fixed double VBUS change (and VBUS -) event when detatching in device mode
 
 590   *  - Added ability to disable ANSI terminal codes by the defining of DISABLE_TERMINAL_CODES in makefile
 
 591   *  - Removed return from ConfigurePipe and ConfigureEndpoint functions - use Pipe_IsConfigured() and 
 
 592   *    Endpoint_IsConfigured() after calling the config functions to determine success