[gnoduino: 1/4] Squashed 'hardware/' changes from 0ce6d5d..0e2ddbe



commit 6ea9c318e2f8a808c3d8d5367d97ff8baecc5c94
Author: Lucian Langa <lucilanga gnome org>
Date:   Tue Jun 12 23:53:12 2012 +0200

    Squashed 'hardware/' changes from 0ce6d5d..0e2ddbe
    
    0e2ddbe Printing NaN values as "nan" in printFloat().
    6414793 Check for NULL pointer in Print.write().
    dff9adc Added support for interrupt on INT2 and INT3 on the Leonardo
    0ef27b0 Merge remote-tracking branch 'upstream/master'
    cbcdc0a Updating SoftwareSerial pin mapping (pin change interrupts) for Leonardo.
    7604f70 added pin change interrupt defines for Leonardo.  fix for broken software serial on Leonardo
    dd5a553 Adding readString() and readStringUntil() to Stream (Adrian McEwen).
    b5a3a6d Mouse.isPressed() now checks only for left button by default
    4f3aca5 renamed Leonardo USB_ class to USBDevice_ to be unambiguous.  renamed "USB" object to "USBDevice" to prevent conflict with USB Host library (thanks Massimo)
    607367a changed PID values for Leonardo bootloader and sketch
    3406cec bugfix for configuring PWM on D6 and D13 too early.  (thanks to Limor Fried)
    3c0484f bugfix for boards with a timer 4 but no channel D
    ebab26c merged Caterina with Blink
    b6bb16a fixed logic bug in Caterina that could stop the bootloader from entering self-programming mode
    b738de0 Micro I hardly knew ye
    f1653a2 Micro and Leonardo bootloaders for distribution are now merged with Blink sketch
    886b1fd sketch USB VID and PID values are passed in from boards.txt at compile time now.  changed sketch PIDs to final values.  also uncommented Micro section in boards.txt
    6ee1023 PID and VID are no longer hard-coded in bootloader.  instead they are passed in at compile-time from makefile.  also added and renamed built bootloader images for Micro and Leonardo
    e939b04 Revert "Revert "added a short delay and comment to boolean operator in CDC""
    bff7ad3 Revert "added a short delay and comment to boolean operator in CDC"
    7327aa6 added a short delay and comment to boolean operator in CDC
    16d40c0 added Boolean operators to HardwareSerial and CDC to test whether the port is ready to send data.
    1d38f3e fixed logic error in Keyboard.release() - now removes every occurrence of a key if it's present more than once
    2ebb06f removed horrible multi-key Keyboard.press() and Keyboard.release() methods
    4d3d0bb eliminated Keyboard.type() - unnecessary duplication of Keyboard.write() (David Mellis).  Also edit KeyboardReprogram example which was the only example using type()
    8864547 added methods to Keyboard to handle multiple simultaneous key presses or releases (up to six each)
    94788a0 Keyboard.type() now just presses and releases the key indicated - doesn't releaseAll()
    a626181 added stub methods for begin() and end() to Mouse and Keyboard
    71266c6 Merge branch 'master' of github.com:arduino/Arduino into LUFA_bootloader
    4c18b53 reduced delay before starting the Leonardo bootloader
    5b93d9c bugfix for Caterina not starting sketch if "verify upload" turned off in IDE.
    f311148 changed Caterina timeout after self-programming to 500 ms (from 250 ms)
    09ed138 give Leonardo bootloader 250 ms to finish housekeeping before leaving self-programming mode
    0525a5d removed old version of Leonardo's caterina bootloader, replaced with LUFA-based caterina
    74474c4 Fix for some strange behaviours during board reset
    1a37431 Added Keyboard support for all modifier and all common non-printing keys.
    8d9c970 Removed support for key mapping in Keyboard.
    619d250 added Keyboard methods press(), release(), and releaseAll()
    936fcb5 Merge branch 'master' of github.com:arduino/Arduino into LUFA_bootloader
    49c829f fixed minor compilation warnings for Leonardo
    469816c reduced Caterina timeout to 8 seconds from 16
    434944d changed auto-reset logic for Leonardo.  only do WDT manipulation if the port is opened at 1200 bps.  (Dave Mellis)
    98d048a Merge branch 'master' of github.com:arduino/Arduino into LUFA_bootloader
    fe65377 Autoreset 1200 bps fix.
    dda458d shortened the watchdog period for resetting Leonardo from 2 s to 250 ms.  Reset into bootloader is much snappier.
    d0f70c0 Merge branch 'master' of github.com:arduino/Arduino into LUFA_bootloader
    a214743 Leonardo now checks whether bootloader should be run after a WDT event.
    f3eb606 Changed Leonardo fuses to select longer clock startup time.
    7564809 Leonardo bootloader jumps straight to sketch for a power-on reset.
    47d73ae Leonardo auto-reset-and-upload changes for Windows (explanation below)
    dcd1322 changed Leonardo bootloader and sketch PID values again (now 0x0701 for bootloader, 0x0801 for sketch)
    d59d937 adjusting descriptors - trying to prevent sketch and bootloader from grabbing different COM numbers on Windows
    e39c0b3 changed Caterina descriptors - Arduino LLC VID, new PID, manufacturer string, and serial number
    eedb85f fixed bug in Caterina which caused some programming instructions to fail
    ac9e4f9 increased Leonardo bootloader timeout to 16 seconds
    219c791 proper bootloader timeout and LED control in Leonardo bootloader
    0cb1c78 fixed starting Leonardo bootloader from sketch
    5a8f781 modify boards.txt with new settings for Caterina_LUFA
    9521a50 Merge branch 'master' of github.com:arduino/Arduino into LUFA_bootloader
    395be48 Caterina now cleanly hands off operation to the sketch
    6022480 move interrupt vector table to application section before jumping to it after upload finished.
    35176d3 Leonardo bootloader checks reason for reset and jumps immediately to sketch if reset was caused by WDT
    88ec90f stripped all LUFA LED control.  from LUFA-based Caterina
    1193c96 changed fuses to select 4k bootloader for LUFA-based Caterina
    806487d added Board/LEDs.h to LUFA-based Caterina
    a817b95 superficial changes to stock LUFA CDC bootloader - renamed project, removed unnecessary files
    97a39a0 initial checkin of LUFA 111009 CDC bootloader
    b59bd96 made Leonardo and Micro bootloader PIDs same as sketch PIDs
    f9e01b0 restored composite and non-composite device descriptors (removed in 4b05c3fc7529477fb7031d42103c15b50a6b58be)
    7ff5077 reenabled HID to force Leonardo bootloader to enumerate as a composite device
    b697b7c renamed DiskLoader to Caterina (after Leonardo's mom)
    5d14e97 changed USB PID for Leonardo and Micro bootloaders
    819326d fixed warning when comparing pgm_read_word(0) to -1 (thanks, Limor Fried and Phillip Torrone)
    e892b87 got rid of u8, u16, u32 typedefs in Diskloader
    7ceed16 made the bootloader's LED control macro names less offensive
    11c1ceb added conditional compilation for HID, removed conditional compilation for CDC (is always used).  disabled HID by default.  also always enumerates as composite now.
    6f83ec4 fix bug in handling of long descriptors for bootloader USB (thank you, Todd Krein, Limor Fried, and Phillip Torrone)
    67ad111 Merge branch 'master' of github.com:arduino/Arduino into new-extension
    83f0b36 reset the Leonardo board when leaving the bootloader, before starting the sketch
    a1b7743 Merge branch 'master' of github.com:arduino/Arduino into new-extension
    15ba656 bootloader merged with blink sketch
    435b622 changed Keyboard write() method to type(). Made write() an alias for type() to allow subclassing by Stream.
    1a4e20b Revert "changed Keyboard write() method to type().  Made write() an alias for type() to allow subclassing by Stream."
    99c0018 changed Keyboard write() method to type().  Made write() an alias for type() to allow subclassing by Stream.
    fc9417b fixed attachInterrupt() on Leonardo
    a11cedb added asynchronous buffering of received CDC characters
    b8700f1 fixed digitalWrite on timer 4 pins (D6 and D13)
    66fee3e fix bootloader size in boards.txt - 2 kB instead of 4 kB
    cea2598 fixed TIMER4 use on Leonardo
    
    git-subtree-dir: hardware
    git-subtree-split: 0e2ddbe56fa35bef912c0ce46caf7638db19c745

 arduino/boards.txt                                 |   51 +-
 arduino/bootloaders/caterina/Caterina-Leonardo.hex | 1024 ++++++++++++++++++++
 arduino/bootloaders/caterina/Caterina.c            |  714 ++++++++++++++
 arduino/bootloaders/caterina/Caterina.h            |   99 ++
 arduino/bootloaders/caterina/Descriptors.c         |  262 +++++
 arduino/bootloaders/caterina/Descriptors.h         |  139 +++
 arduino/bootloaders/caterina/Makefile              |  728 ++++++++++++++
 .../bootloaders/diskloader/DiskLoader-Leonardo.hex |  115 ---
 arduino/bootloaders/diskloader/Makefile            |  105 --
 arduino/bootloaders/diskloader/src/DiskLoader.cpp  |  239 -----
 arduino/bootloaders/diskloader/src/Platform.h      |   51 -
 arduino/bootloaders/diskloader/src/USBCore.cpp     |  510 ----------
 arduino/bootloaders/diskloader/src/USBCore.h       |  246 -----
 arduino/bootloaders/diskloader/src/USBDesc.cpp     |   87 --
 arduino/bootloaders/diskloader/src/USBDesc.h       |   65 --
 arduino/cores/arduino/CDC.cpp                      |  106 ++-
 arduino/cores/arduino/HID.cpp                      |  144 +++-
 arduino/cores/arduino/HardwareSerial.cpp           |    4 +
 arduino/cores/arduino/HardwareSerial.h             |    1 +
 arduino/cores/arduino/Print.cpp                    |    2 +
 arduino/cores/arduino/Print.h                      |    5 +-
 arduino/cores/arduino/Stream.cpp                   |   24 +
 arduino/cores/arduino/Stream.h                     |    2 +
 arduino/cores/arduino/USBAPI.h                     |   81 ++-
 arduino/cores/arduino/USBCore.cpp                  |   32 +-
 arduino/cores/arduino/USBDesc.h                    |    4 -
 arduino/cores/arduino/WInterrupts.c                |   62 ++-
 arduino/cores/arduino/main.cpp                     |    2 +-
 arduino/cores/arduino/wiring.c                     |   11 +-
 arduino/cores/arduino/wiring_analog.c              |   24 +-
 arduino/cores/arduino/wiring_digital.c             |    8 +-
 arduino/cores/arduino/wiring_private.h             |    2 +
 arduino/variants/leonardo/pins_arduino.h           |    9 +-
 arduino/variants/micro/pins_arduino.h              |   27 -
 34 files changed, 3388 insertions(+), 1597 deletions(-)
---
diff --git a/arduino/boards.txt b/arduino/boards.txt
index 8ce7cc9..638eb4a 100644
--- a/arduino/boards.txt
+++ b/arduino/boards.txt
@@ -146,39 +146,24 @@ mega.build.variant=mega
 
 ##############################################################
 
-#leonardo.name=Arduino Leonardo
-#leonardo.upload.protocol=arduino
-#leonardo.upload.maximum_size=28672
-#leonardo.upload.speed=1200
-#leonardo.bootloader.low_fuses=0xde
-#leonardo.bootloader.high_fuses=0xd8
-#leonardo.bootloader.extended_fuses=0xcb
-#leonardo.bootloader.path=diskloader
-#leonardo.bootloader.file=DiskLoader-Leonardo.hex
-#leonardo.bootloader.unlock_bits=0x3F
-#leonardo.bootloader.lock_bits=0x2F
-#leonardo.build.mcu=atmega32u4
-#leonardo.build.f_cpu=16000000L
-#leonardo.build.core=arduino
-#leonardo.build.variant=leonardo
-
-##############################################################
-
-#micro.name=Arduino Micro
-#micro.upload.protocol=arduino
-#micro.upload.maximum_size=30720
-#micro.upload.speed=1200
-#micro.bootloader.low_fuses=0xde
-#micro.bootloader.high_fuses=0xda
-#micro.bootloader.extended_fuses=0xcb
-#micro.bootloader.path=diskloader
-#micro.bootloader.file=DiskLoader-Micro.hex
-#micro.bootloader.unlock_bits=0x3F
-#micro.bootloader.lock_bits=0x2F
-#micro.build.mcu=atmega32u4
-#micro.build.f_cpu=16000000L
-#micro.build.core=arduino
-#micro.build.variant=micro
+leonardo.name=Arduino Leonardo
+leonardo.upload.protocol=avr109
+leonardo.upload.maximum_size=28672
+leonardo.upload.speed=57600
+leonardo.upload.disable_flushing=true
+leonardo.bootloader.low_fuses=0xff
+leonardo.bootloader.high_fuses=0xd8
+leonardo.bootloader.extended_fuses=0xcb
+leonardo.bootloader.path=caterina
+leonardo.bootloader.file=Caterina-Leonardo.hex
+leonardo.bootloader.unlock_bits=0x3F
+leonardo.bootloader.lock_bits=0x2F
+leonardo.build.mcu=atmega32u4
+leonardo.build.f_cpu=16000000L
+leonardo.build.vid=0x2341
+leonardo.build.pid=0x8036
+leonardo.build.core=arduino
+leonardo.build.variant=leonardo
 
 ##############################################################
 
diff --git a/arduino/bootloaders/caterina/Caterina-Leonardo.hex b/arduino/bootloaders/caterina/Caterina-Leonardo.hex
new file mode 100644
index 0000000..de7b53c
--- /dev/null
+++ b/arduino/bootloaders/caterina/Caterina-Leonardo.hex
@@ -0,0 +1,1024 @@
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diff --git a/arduino/bootloaders/caterina/Caterina.c b/arduino/bootloaders/caterina/Caterina.c
new file mode 100755
index 0000000..abcba2b
--- /dev/null
+++ b/arduino/bootloaders/caterina/Caterina.c
@@ -0,0 +1,714 @@
+/*
+             LUFA Library
+     Copyright (C) Dean Camera, 2011.
+
+  dean [at] fourwalledcubicle [dot] com
+           www.lufa-lib.org
+*/
+
+/*
+  Copyright 2011  Dean Camera (dean [at] fourwalledcubicle [dot] com)
+
+  Permission to use, copy, modify, distribute, and sell this
+  software and its documentation for any purpose is hereby granted
+  without fee, provided that the above copyright notice appear in
+  all copies and that both that the copyright notice and this
+  permission notice and warranty disclaimer appear in supporting
+  documentation, and that the name of the author not be used in
+  advertising or publicity pertaining to distribution of the
+  software without specific, written prior permission.
+
+  The author disclaim all warranties with regard to this
+  software, including all implied warranties of merchantability
+  and fitness.  In no event shall the author be liable for any
+  special, indirect or consequential damages or any damages
+  whatsoever resulting from loss of use, data or profits, whether
+  in an action of contract, negligence or other tortious action,
+  arising out of or in connection with the use or performance of
+  this software.
+*/
+
+/** \file
+ *
+ *  Main source file for the CDC class bootloader. This file contains the complete bootloader logic.
+ */
+
+#define  INCLUDE_FROM_CATERINA_C
+#include "Caterina.h"
+
+/** Contains the current baud rate and other settings of the first virtual serial port. This must be retained as some
+ *  operating systems will not open the port unless the settings can be set successfully.
+ */
+static CDC_LineEncoding_t LineEncoding = { .BaudRateBPS = 0,
+                                           .CharFormat  = CDC_LINEENCODING_OneStopBit,
+                                           .ParityType  = CDC_PARITY_None,
+                                           .DataBits    = 8                            };
+
+/** Current address counter. This stores the current address of the FLASH or EEPROM as set by the host,
+ *  and is used when reading or writing to the AVRs memory (either FLASH or EEPROM depending on the issued
+ *  command.)
+ */
+static uint32_t CurrAddress;
+
+/** Flag to indicate if the bootloader should be running, or should exit and allow the application code to run
+ *  via a watchdog reset. When cleared the bootloader will exit, starting the watchdog and entering an infinite
+ *  loop until the AVR restarts and the application runs.
+ */
+static bool RunBootloader = true;
+
+/* Pulse generation counters to keep track of the time remaining for each pulse type */
+#define TX_RX_LED_PULSE_PERIOD 100
+uint16_t TxLEDPulse = 0; // time remaining for Tx LED pulse
+uint16_t RxLEDPulse = 0; // time remaining for Rx LED pulse
+
+/* Bootloader timeout timer */
+#define TIMEOUT_PERIOD	8000
+uint16_t Timeout = 0;
+
+uint16_t bootKey = 0x7777;
+volatile uint16_t *const bootKeyPtr = (volatile uint16_t *)0x0800;
+
+void StartSketch(void)
+{
+	cli();
+	
+	/* Undo TIMER1 setup and clear the count before running the sketch */
+	TIMSK1 = 0;
+	TCCR1B = 0;
+	TCNT1H = 0;		// 16-bit write to TCNT1 requires high byte be written first
+	TCNT1L = 0;
+	
+	/* Relocate the interrupt vector table to the application section */
+	MCUCR = (1 << IVCE);
+	MCUCR = 0;
+
+	L_LED_OFF();
+	TX_LED_OFF();
+	RX_LED_OFF();
+
+	/* jump to beginning of application space */
+	__asm__ volatile("jmp 0x0000");
+}
+
+/*	Breathing animation on L LED indicates bootloader is running */
+uint16_t LLEDPulse;
+void LEDPulse(void)
+{
+	LLEDPulse++;
+	uint8_t p = LLEDPulse >> 8;
+	if (p > 127)
+		p = 254-p;
+	p += p;
+	if (((uint8_t)LLEDPulse) > p)
+		L_LED_OFF();
+	else
+		L_LED_ON();
+}
+
+/** Main program entry point. This routine configures the hardware required by the bootloader, then continuously
+ *  runs the bootloader processing routine until it times out or is instructed to exit.
+ */
+int main(void)
+{
+	/* Save the value of the boot key memory before it is overwritten */
+	uint16_t bootKeyPtrVal = *bootKeyPtr;
+	*bootKeyPtr = 0;
+
+	/* Check the reason for the reset so we can act accordingly */
+	uint8_t  mcusr_state = MCUSR;		// store the initial state of the Status register
+	MCUSR = 0;							// clear all reset flags	
+
+	/* Watchdog may be configured with a 15 ms period so must disable it before going any further */
+	wdt_disable();
+	
+	if (mcusr_state & (1<<EXTRF)) {
+		// External reset -  we should continue to self-programming mode.
+	} else if (mcusr_state == (1<<PORF) && pgm_read_word(0) != 0xFFFF) {		
+		// After a power-on reset skip the bootloader and jump straight to sketch 
+		// if one exists.	
+		StartSketch();
+	} else if ((mcusr_state == (1<<WDRF)) && (bootKeyPtrVal != bootKey) && (pgm_read_word(0) != 0xFFFF)) {	
+		// If it looks like an "accidental" watchdog reset then start the sketch.
+		StartSketch();
+	}
+	
+	/* Setup hardware required for the bootloader */
+	SetupHardware();
+
+	/* Enable global interrupts so that the USB stack can function */
+	sei();
+	
+	Timeout = 0;
+	
+	while (RunBootloader)
+	{
+		CDC_Task();
+		USB_USBTask();
+		/* Time out and start the sketch if one is present */
+		if (Timeout > TIMEOUT_PERIOD)
+			RunBootloader = false;
+
+		LEDPulse();
+	}
+
+	/* Disconnect from the host - USB interface will be reset later along with the AVR */
+	USB_Detach();
+
+	/* Jump to beginning of application space to run the sketch - do not reset */	
+	StartSketch();
+}
+
+/** Configures all hardware required for the bootloader. */
+void SetupHardware(void)
+{
+	/* Disable watchdog if enabled by bootloader/fuses */
+	MCUSR &= ~(1 << WDRF);
+	wdt_disable();
+
+	/* Disable clock division */
+	clock_prescale_set(clock_div_1);
+
+	/* Relocate the interrupt vector table to the bootloader section */
+	MCUCR = (1 << IVCE);
+	MCUCR = (1 << IVSEL);
+	
+	LED_SETUP();
+	CPU_PRESCALE(0); 
+	L_LED_OFF();
+	TX_LED_OFF();
+	RX_LED_OFF();
+	
+	/* Initialize TIMER1 to handle bootloader timeout and LED tasks.  
+	 * With 16 MHz clock and 1/64 prescaler, timer 1 is clocked at 250 kHz
+	 * Our chosen compare match generates an interrupt every 1 ms.
+	 * This interrupt is disabled selectively when doing memory reading, erasing,
+	 * or writing since SPM has tight timing requirements.
+	 */ 
+	OCR1AH = 0;
+	OCR1AL = 250;
+	TIMSK1 = (1 << OCIE1A);					// enable timer 1 output compare A match interrupt
+	TCCR1B = ((1 << CS11) | (1 << CS10));	// 1/64 prescaler on timer 1 input
+
+	/* Initialize USB Subsystem */
+	USB_Init();
+}
+
+//uint16_t ctr = 0;
+ISR(TIMER1_COMPA_vect, ISR_BLOCK)
+{
+	/* Reset counter */
+	TCNT1H = 0;
+	TCNT1L = 0;
+
+	/* Check whether the TX or RX LED one-shot period has elapsed.  if so, turn off the LED */
+	if (TxLEDPulse && !(--TxLEDPulse))
+		TX_LED_OFF();
+	if (RxLEDPulse && !(--RxLEDPulse))
+		RX_LED_OFF();
+	
+	if (pgm_read_word(0) != 0xFFFF)
+		Timeout++;
+}
+
+/** Event handler for the USB_ConfigurationChanged event. This configures the device's endpoints ready
+ *  to relay data to and from the attached USB host.
+ */
+void EVENT_USB_Device_ConfigurationChanged(void)
+{
+	/* Setup CDC Notification, Rx and Tx Endpoints */
+	Endpoint_ConfigureEndpoint(CDC_NOTIFICATION_EPNUM, EP_TYPE_INTERRUPT,
+	                           ENDPOINT_DIR_IN, CDC_NOTIFICATION_EPSIZE,
+	                           ENDPOINT_BANK_SINGLE);
+
+	Endpoint_ConfigureEndpoint(CDC_TX_EPNUM, EP_TYPE_BULK,
+	                           ENDPOINT_DIR_IN, CDC_TXRX_EPSIZE,
+	                           ENDPOINT_BANK_SINGLE);
+
+	Endpoint_ConfigureEndpoint(CDC_RX_EPNUM, EP_TYPE_BULK,
+	                           ENDPOINT_DIR_OUT, CDC_TXRX_EPSIZE,
+	                           ENDPOINT_BANK_SINGLE);
+}
+
+/** Event handler for the USB_ControlRequest event. This is used to catch and process control requests sent to
+ *  the device from the USB host before passing along unhandled control requests to the library for processing
+ *  internally.
+ */
+void EVENT_USB_Device_ControlRequest(void)
+{
+	/* Ignore any requests that aren't directed to the CDC interface */
+	if ((USB_ControlRequest.bmRequestType & (CONTROL_REQTYPE_TYPE | CONTROL_REQTYPE_RECIPIENT)) !=
+	    (REQTYPE_CLASS | REQREC_INTERFACE))
+	{
+		return;
+	}
+
+	/* Process CDC specific control requests */
+	switch (USB_ControlRequest.bRequest)
+	{
+		case CDC_REQ_GetLineEncoding:
+			if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
+			{
+				Endpoint_ClearSETUP();
+
+				/* Write the line coding data to the control endpoint */
+				Endpoint_Write_Control_Stream_LE(&LineEncoding, sizeof(CDC_LineEncoding_t));
+				Endpoint_ClearOUT();
+			}
+
+			break;
+		case CDC_REQ_SetLineEncoding:
+			if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE))
+			{
+				Endpoint_ClearSETUP();
+
+				/* Read the line coding data in from the host into the global struct */
+				Endpoint_Read_Control_Stream_LE(&LineEncoding, sizeof(CDC_LineEncoding_t));
+				Endpoint_ClearIN();
+			}
+
+			break;
+	}
+}
+
+#if !defined(NO_BLOCK_SUPPORT)
+/** Reads or writes a block of EEPROM or FLASH memory to or from the appropriate CDC data endpoint, depending
+ *  on the AVR910 protocol command issued.
+ *
+ *  \param[in] Command  Single character AVR910 protocol command indicating what memory operation to perform
+ */
+static void ReadWriteMemoryBlock(const uint8_t Command)
+{
+	uint16_t BlockSize;
+	char     MemoryType;
+
+	bool     HighByte = false;
+	uint8_t  LowByte  = 0;
+
+	BlockSize  = (FetchNextCommandByte() << 8);
+	BlockSize |=  FetchNextCommandByte();
+
+	MemoryType =  FetchNextCommandByte();
+
+	if ((MemoryType != 'E') && (MemoryType != 'F'))
+	{
+		/* Send error byte back to the host */
+		WriteNextResponseByte('?');
+
+		return;
+	}
+
+	/* Disable timer 1 interrupt - can't afford to process nonessential interrupts
+	 * while doing SPM tasks */
+	TIMSK1 = 0;
+
+	/* Check if command is to read memory */
+	if (Command == 'g')
+	{		
+		/* Re-enable RWW section */
+		boot_rww_enable();
+
+		while (BlockSize--)
+		{
+			if (MemoryType == 'F')
+			{
+				/* Read the next FLASH byte from the current FLASH page */
+				#if (FLASHEND > 0xFFFF)
+				WriteNextResponseByte(pgm_read_byte_far(CurrAddress | HighByte));
+				#else
+				WriteNextResponseByte(pgm_read_byte(CurrAddress | HighByte));
+				#endif
+
+				/* If both bytes in current word have been read, increment the address counter */
+				if (HighByte)
+				  CurrAddress += 2;
+
+				HighByte = !HighByte;
+			}
+			else
+			{
+				/* Read the next EEPROM byte into the endpoint */
+				WriteNextResponseByte(eeprom_read_byte((uint8_t*)(intptr_t)(CurrAddress >> 1)));
+
+				/* Increment the address counter after use */
+				CurrAddress += 2;
+			}
+		}
+	}
+	else
+	{
+		uint32_t PageStartAddress = CurrAddress;
+
+		if (MemoryType == 'F')
+		{
+			boot_page_erase(PageStartAddress);
+			boot_spm_busy_wait();
+		}
+
+		while (BlockSize--)
+		{
+			if (MemoryType == 'F')
+			{
+				/* If both bytes in current word have been written, increment the address counter */
+				if (HighByte)
+				{
+					/* Write the next FLASH word to the current FLASH page */
+					boot_page_fill(CurrAddress, ((FetchNextCommandByte() << 8) | LowByte));
+
+					/* Increment the address counter after use */
+					CurrAddress += 2;
+				}
+				else
+				{
+					LowByte = FetchNextCommandByte();
+				}
+				
+				HighByte = !HighByte;
+			}
+			else
+			{
+				/* Write the next EEPROM byte from the endpoint */
+				eeprom_write_byte((uint8_t*)((intptr_t)(CurrAddress >> 1)), FetchNextCommandByte());
+
+				/* Increment the address counter after use */
+				CurrAddress += 2;
+			}
+		}
+
+		/* If in FLASH programming mode, commit the page after writing */
+		if (MemoryType == 'F')
+		{
+			/* Commit the flash page to memory */
+			boot_page_write(PageStartAddress);
+
+			/* Wait until write operation has completed */
+			boot_spm_busy_wait();
+		}
+
+		/* Send response byte back to the host */
+		WriteNextResponseByte('\r');
+	}
+
+	/* Re-enable timer 1 interrupt disabled earlier in this routine */	
+	TIMSK1 = (1 << OCIE1A);
+}
+#endif
+
+/** Retrieves the next byte from the host in the CDC data OUT endpoint, and clears the endpoint bank if needed
+ *  to allow reception of the next data packet from the host.
+ *
+ *  \return Next received byte from the host in the CDC data OUT endpoint
+ */
+static uint8_t FetchNextCommandByte(void)
+{
+	/* Select the OUT endpoint so that the next data byte can be read */
+	Endpoint_SelectEndpoint(CDC_RX_EPNUM);
+
+	/* If OUT endpoint empty, clear it and wait for the next packet from the host */
+	while (!(Endpoint_IsReadWriteAllowed()))
+	{
+		Endpoint_ClearOUT();
+
+		while (!(Endpoint_IsOUTReceived()))
+		{
+			if (USB_DeviceState == DEVICE_STATE_Unattached)
+			  return 0;
+		}
+	}
+
+	/* Fetch the next byte from the OUT endpoint */
+	return Endpoint_Read_8();
+}
+
+/** Writes the next response byte to the CDC data IN endpoint, and sends the endpoint back if needed to free up the
+ *  bank when full ready for the next byte in the packet to the host.
+ *
+ *  \param[in] Response  Next response byte to send to the host
+ */
+static void WriteNextResponseByte(const uint8_t Response)
+{
+	/* Select the IN endpoint so that the next data byte can be written */
+	Endpoint_SelectEndpoint(CDC_TX_EPNUM);
+
+	/* If IN endpoint full, clear it and wait until ready for the next packet to the host */
+	if (!(Endpoint_IsReadWriteAllowed()))
+	{
+		Endpoint_ClearIN();
+
+		while (!(Endpoint_IsINReady()))
+		{
+			if (USB_DeviceState == DEVICE_STATE_Unattached)
+			  return;
+		}
+	}
+
+	/* Write the next byte to the IN endpoint */
+	Endpoint_Write_8(Response);
+	
+	TX_LED_ON();
+	TxLEDPulse = TX_RX_LED_PULSE_PERIOD;
+}
+
+#define STK_OK              0x10
+#define STK_INSYNC          0x14  // ' '
+#define CRC_EOP             0x20  // 'SPACE'
+#define STK_GET_SYNC        0x30  // '0'
+
+#define STK_GET_PARAMETER   0x41  // 'A'
+#define STK_SET_DEVICE      0x42  // 'B'
+#define STK_SET_DEVICE_EXT  0x45  // 'E'
+#define STK_LOAD_ADDRESS    0x55  // 'U'
+#define STK_UNIVERSAL       0x56  // 'V'
+#define STK_PROG_PAGE       0x64  // 'd'
+#define STK_READ_PAGE       0x74  // 't'
+#define STK_READ_SIGN       0x75  // 'u'
+
+/** Task to read in AVR910 commands from the CDC data OUT endpoint, process them, perform the required actions
+ *  and send the appropriate response back to the host.
+ */
+void CDC_Task(void)
+{
+	/* Select the OUT endpoint */
+	Endpoint_SelectEndpoint(CDC_RX_EPNUM);
+
+	/* Check if endpoint has a command in it sent from the host */
+	if (!(Endpoint_IsOUTReceived()))
+	  return;
+	  
+	RX_LED_ON();
+	RxLEDPulse = TX_RX_LED_PULSE_PERIOD;
+
+	/* Read in the bootloader command (first byte sent from host) */
+	uint8_t Command = FetchNextCommandByte();
+
+	if (Command == 'E')
+	{
+		/* We nearly run out the bootloader timeout clock, 
+		* leaving just a few hundred milliseconds so the 
+		* bootloder has time to respond and service any 
+		* subsequent requests */
+		Timeout = TIMEOUT_PERIOD - 500;
+	
+		/* Re-enable RWW section - must be done here in case 
+		 * user has disabled verification on upload.  */
+		boot_rww_enable_safe();		
+
+		// Send confirmation byte back to the host 
+		WriteNextResponseByte('\r');
+	}
+	else if (Command == 'T')
+	{
+		FetchNextCommandByte();
+
+		// Send confirmation byte back to the host 
+		WriteNextResponseByte('\r');
+	}
+	else if ((Command == 'L') || (Command == 'P'))
+	{
+		// Send confirmation byte back to the host 
+		WriteNextResponseByte('\r');
+	}
+	else if (Command == 't')
+	{
+		// Return ATMEGA128 part code - this is only to allow AVRProg to use the bootloader 
+		WriteNextResponseByte(0x44);
+		WriteNextResponseByte(0x00);
+	}
+	else if (Command == 'a')
+	{
+		// Indicate auto-address increment is supported 
+		WriteNextResponseByte('Y');
+	}
+	else if (Command == 'A')
+	{
+		// Set the current address to that given by the host 
+		CurrAddress   = (FetchNextCommandByte() << 9);
+		CurrAddress  |= (FetchNextCommandByte() << 1);
+
+		// Send confirmation byte back to the host 
+		WriteNextResponseByte('\r');
+	}
+	else if (Command == 'p')
+	{
+		// Indicate serial programmer back to the host 
+		WriteNextResponseByte('S');
+	}
+	else if (Command == 'S')
+	{
+		// Write the 7-byte software identifier to the endpoint 
+		for (uint8_t CurrByte = 0; CurrByte < 7; CurrByte++)
+		  WriteNextResponseByte(SOFTWARE_IDENTIFIER[CurrByte]);
+	}
+	else if (Command == 'V')
+	{
+		WriteNextResponseByte('0' + BOOTLOADER_VERSION_MAJOR);
+		WriteNextResponseByte('0' + BOOTLOADER_VERSION_MINOR);
+	}
+	else if (Command == 's')
+	{
+		WriteNextResponseByte(AVR_SIGNATURE_3);
+		WriteNextResponseByte(AVR_SIGNATURE_2);
+		WriteNextResponseByte(AVR_SIGNATURE_1);
+	}
+	else if (Command == 'e')
+	{
+		// Clear the application section of flash 
+		for (uint32_t CurrFlashAddress = 0; CurrFlashAddress < BOOT_START_ADDR; CurrFlashAddress += SPM_PAGESIZE)
+		{
+			boot_page_erase(CurrFlashAddress);
+			boot_spm_busy_wait();
+			boot_page_write(CurrFlashAddress);
+			boot_spm_busy_wait();
+		}
+
+		// Send confirmation byte back to the host 
+		WriteNextResponseByte('\r');
+	}
+	#if !defined(NO_LOCK_BYTE_WRITE_SUPPORT)
+	else if (Command == 'l')
+	{
+		// Set the lock bits to those given by the host 
+		boot_lock_bits_set(FetchNextCommandByte());
+
+		// Send confirmation byte back to the host 
+		WriteNextResponseByte('\r');
+	}
+	#endif
+	else if (Command == 'r')
+	{
+		WriteNextResponseByte(boot_lock_fuse_bits_get(GET_LOCK_BITS));
+	}
+	else if (Command == 'F')
+	{
+		WriteNextResponseByte(boot_lock_fuse_bits_get(GET_LOW_FUSE_BITS));
+	}
+	else if (Command == 'N')
+	{
+		WriteNextResponseByte(boot_lock_fuse_bits_get(GET_HIGH_FUSE_BITS));
+	}
+	else if (Command == 'Q')
+	{
+		WriteNextResponseByte(boot_lock_fuse_bits_get(GET_EXTENDED_FUSE_BITS));
+	}
+	#if !defined(NO_BLOCK_SUPPORT)
+	else if (Command == 'b')
+	{
+		WriteNextResponseByte('Y');
+
+		// Send block size to the host 
+		WriteNextResponseByte(SPM_PAGESIZE >> 8);
+		WriteNextResponseByte(SPM_PAGESIZE & 0xFF);
+	}
+	else if ((Command == 'B') || (Command == 'g'))
+	{
+		// Keep resetting the timeout counter if we're receiving self-programming instructions
+		Timeout = 0;
+		// Delegate the block write/read to a separate function for clarity 
+		ReadWriteMemoryBlock(Command);
+	}
+	#endif
+	#if !defined(NO_FLASH_BYTE_SUPPORT)
+	else if (Command == 'C')
+	{
+		// Write the high byte to the current flash page
+		boot_page_fill(CurrAddress, FetchNextCommandByte());
+
+		// Send confirmation byte back to the host 
+		WriteNextResponseByte('\r');
+	}
+	else if (Command == 'c')
+	{
+		// Write the low byte to the current flash page 
+		boot_page_fill(CurrAddress | 0x01, FetchNextCommandByte());
+
+		// Increment the address 
+		CurrAddress += 2;
+
+		// Send confirmation byte back to the host 
+		WriteNextResponseByte('\r');
+	}
+	else if (Command == 'm')
+	{
+		// Commit the flash page to memory
+		boot_page_write(CurrAddress);
+
+		// Wait until write operation has completed 
+		boot_spm_busy_wait();
+
+		// Send confirmation byte back to the host 
+		WriteNextResponseByte('\r');
+	}
+	else if (Command == 'R')
+	{
+		#if (FLASHEND > 0xFFFF)
+		uint16_t ProgramWord = pgm_read_word_far(CurrAddress);
+		#else
+		uint16_t ProgramWord = pgm_read_word(CurrAddress);
+		#endif
+
+		WriteNextResponseByte(ProgramWord >> 8);
+		WriteNextResponseByte(ProgramWord & 0xFF);
+	}
+	#endif
+	#if !defined(NO_EEPROM_BYTE_SUPPORT)
+	else if (Command == 'D')
+	{
+		// Read the byte from the endpoint and write it to the EEPROM 
+		eeprom_write_byte((uint8_t*)((intptr_t)(CurrAddress >> 1)), FetchNextCommandByte());
+
+		// Increment the address after use
+		CurrAddress += 2;
+
+		// Send confirmation byte back to the host 
+		WriteNextResponseByte('\r');
+	}
+	else if (Command == 'd')
+	{
+		// Read the EEPROM byte and write it to the endpoint 
+		WriteNextResponseByte(eeprom_read_byte((uint8_t*)((intptr_t)(CurrAddress >> 1))));
+
+		// Increment the address after use 
+		CurrAddress += 2;
+	}
+	#endif
+	else if (Command != 27)
+	{
+		// Unknown (non-sync) command, return fail code 
+		WriteNextResponseByte('?');
+	}
+	
+
+	/* Select the IN endpoint */
+	Endpoint_SelectEndpoint(CDC_TX_EPNUM);
+
+	/* Remember if the endpoint is completely full before clearing it */
+	bool IsEndpointFull = !(Endpoint_IsReadWriteAllowed());
+
+	/* Send the endpoint data to the host */
+	Endpoint_ClearIN();
+
+	/* If a full endpoint's worth of data was sent, we need to send an empty packet afterwards to signal end of transfer */
+	if (IsEndpointFull)
+	{
+		while (!(Endpoint_IsINReady()))
+		{
+			if (USB_DeviceState == DEVICE_STATE_Unattached)
+			  return;
+		}
+
+		Endpoint_ClearIN();
+	}
+
+	/* Wait until the data has been sent to the host */
+	while (!(Endpoint_IsINReady()))
+	{
+		if (USB_DeviceState == DEVICE_STATE_Unattached)
+		  return;
+	}
+
+	/* Select the OUT endpoint */
+	Endpoint_SelectEndpoint(CDC_RX_EPNUM);
+
+	/* Acknowledge the command from the host */
+	Endpoint_ClearOUT();
+}
+
diff --git a/arduino/bootloaders/caterina/Caterina.h b/arduino/bootloaders/caterina/Caterina.h
new file mode 100755
index 0000000..f8251d4
--- /dev/null
+++ b/arduino/bootloaders/caterina/Caterina.h
@@ -0,0 +1,99 @@
+/*
+             LUFA Library
+     Copyright (C) Dean Camera, 2011.
+
+  dean [at] fourwalledcubicle [dot] com
+           www.lufa-lib.org
+*/
+
+/*
+  Copyright 2011  Dean Camera (dean [at] fourwalledcubicle [dot] com)
+
+  Permission to use, copy, modify, distribute, and sell this
+  software and its documentation for any purpose is hereby granted
+  without fee, provided that the above copyright notice appear in
+  all copies and that both that the copyright notice and this
+  permission notice and warranty disclaimer appear in supporting
+  documentation, and that the name of the author not be used in
+  advertising or publicity pertaining to distribution of the
+  software without specific, written prior permission.
+
+  The author disclaim all warranties with regard to this
+  software, including all implied warranties of merchantability
+  and fitness.  In no event shall the author be liable for any
+  special, indirect or consequential damages or any damages
+  whatsoever resulting from loss of use, data or profits, whether
+  in an action of contract, negligence or other tortious action,
+  arising out of or in connection with the use or performance of
+  this software.
+*/
+
+/** \file
+ *
+ *  Header file for BootloaderCDC.c.
+ */
+
+#ifndef _CDC_H_
+#define _CDC_H_
+
+	/* Includes: */
+		#include <avr/io.h>
+		#include <avr/wdt.h>
+		#include <avr/boot.h>
+		#include <avr/eeprom.h>
+		#include <avr/power.h>
+		#include <avr/interrupt.h>
+		#include <stdbool.h>
+
+		#include "Descriptors.h"
+
+		#include <LUFA/Drivers/USB/USB.h>
+	/* Macros: */
+		/** Version major of the CDC bootloader. */
+		#define BOOTLOADER_VERSION_MAJOR     0x01
+
+		/** Version minor of the CDC bootloader. */
+		#define BOOTLOADER_VERSION_MINOR     0x00
+
+		/** Hardware version major of the CDC bootloader. */
+		#define BOOTLOADER_HWVERSION_MAJOR   0x01
+
+		/** Hardware version minor of the CDC bootloader. */
+		#define BOOTLOADER_HWVERSION_MINOR   0x00
+
+		/** Eight character bootloader firmware identifier reported to the host when requested */
+		#define SOFTWARE_IDENTIFIER          "CATERINA"
+		
+		#define CPU_PRESCALE(n)	(CLKPR = 0x80, CLKPR = (n))
+		#define LED_SETUP()		DDRC |= (1<<7); DDRB |= (1<<0); DDRD |= (1<<5);
+		#define L_LED_OFF()		PORTC &= ~(1<<7)
+		#define L_LED_ON()		PORTC |= (1<<7)
+		#define L_LED_TOGGLE()	PORTC ^= (1<<7)
+		#define TX_LED_OFF()	PORTD |= (1<<5)
+		#define TX_LED_ON()		PORTD &= ~(1<<5)
+		#define RX_LED_OFF()	PORTB |= (1<<0)
+		#define RX_LED_ON()		PORTB &= ~(1<<0)
+
+	/* Type Defines: */
+		/** Type define for a non-returning pointer to the start of the loaded application in flash memory. */
+		typedef void (*AppPtr_t)(void) ATTR_NO_RETURN;
+
+	/* Function Prototypes: */
+		void StartSketch(void);
+		void LEDPulse(void);
+	
+		void CDC_Task(void);
+		void SetupHardware(void);
+
+		void EVENT_USB_Device_ConfigurationChanged(void);
+
+		#if defined(INCLUDE_FROM_CATERINA_C) || defined(__DOXYGEN__)
+			#if !defined(NO_BLOCK_SUPPORT)
+			static void    ReadWriteMemoryBlock(const uint8_t Command);
+			#endif
+			static uint8_t FetchNextCommandByte(void);
+			static void    WriteNextResponseByte(const uint8_t Response);
+		#endif
+
+#endif
+
diff --git a/arduino/bootloaders/caterina/Descriptors.c b/arduino/bootloaders/caterina/Descriptors.c
new file mode 100755
index 0000000..c5feaf5
--- /dev/null
+++ b/arduino/bootloaders/caterina/Descriptors.c
@@ -0,0 +1,262 @@
+/*
+             LUFA Library
+     Copyright (C) Dean Camera, 2011.
+
+  dean [at] fourwalledcubicle [dot] com
+           www.lufa-lib.org
+*/
+
+/*
+  Copyright 2011  Dean Camera (dean [at] fourwalledcubicle [dot] com)
+
+  Permission to use, copy, modify, distribute, and sell this
+  software and its documentation for any purpose is hereby granted
+  without fee, provided that the above copyright notice appear in
+  all copies and that both that the copyright notice and this
+  permission notice and warranty disclaimer appear in supporting
+  documentation, and that the name of the author not be used in
+  advertising or publicity pertaining to distribution of the
+  software without specific, written prior permission.
+
+  The author disclaim all warranties with regard to this
+  software, including all implied warranties of merchantability
+  and fitness.  In no event shall the author be liable for any
+  special, indirect or consequential damages or any damages
+  whatsoever resulting from loss of use, data or profits, whether
+  in an action of contract, negligence or other tortious action,
+  arising out of or in connection with the use or performance of
+  this software.
+*/
+
+/** \file
+ *
+ *  USB Device Descriptors, for library use when in USB device mode. Descriptors are special
+ *  computer-readable structures which the host requests upon device enumeration, to determine
+ *  the device's capabilities and functions.
+ */
+
+#include "Descriptors.h"
+
+/** Device descriptor structure. This descriptor, located in SRAM memory, describes the overall
+ *  device characteristics, including the supported USB version, control endpoint size and the
+ *  number of device configurations. The descriptor is read out by the USB host when the enumeration
+ *  process begins.
+ */
+const USB_Descriptor_Device_t DeviceDescriptor =
+{
+	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
+
+	.USBSpecification       = VERSION_BCD(01.10),
+	.Class                  = CDC_CSCP_CDCClass,
+	.SubClass               = CDC_CSCP_NoSpecificSubclass,
+	.Protocol               = CDC_CSCP_NoSpecificProtocol,
+
+	.Endpoint0Size          = FIXED_CONTROL_ENDPOINT_SIZE,
+
+	.VendorID               = DEVICE_VID,
+	.ProductID              = DEVICE_PID,
+	.ReleaseNumber          = VERSION_BCD(00.01),
+
+	.ManufacturerStrIndex   = 0x02,
+	.ProductStrIndex        = 0x01,
+	.SerialNumStrIndex      = NO_DESCRIPTOR,
+
+	.NumberOfConfigurations = FIXED_NUM_CONFIGURATIONS
+};
+
+/** Configuration descriptor structure. This descriptor, located in SRAM memory, describes the usage
+ *  of the device in one of its supported configurations, including information about any device interfaces
+ *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
+ *  a configuration so that the host may correctly communicate with the USB device.
+ */
+const USB_Descriptor_Configuration_t ConfigurationDescriptor =
+{
+	.Config =
+		{
+			.Header                 = {.Size = sizeof(USB_Descriptor_Configuration_Header_t), .Type = DTYPE_Configuration},
+
+			.TotalConfigurationSize = sizeof(USB_Descriptor_Configuration_t),
+			.TotalInterfaces        = 2,
+
+			.ConfigurationNumber    = 1,
+			.ConfigurationStrIndex  = NO_DESCRIPTOR,
+
+			.ConfigAttributes       = USB_CONFIG_ATTR_BUSPOWERED,
+
+			.MaxPowerConsumption    = USB_CONFIG_POWER_MA(100)
+		},
+
+	.CDC_CCI_Interface =
+		{
+			.Header                 = {.Size = sizeof(USB_Descriptor_Interface_t), .Type = DTYPE_Interface},
+
+			.InterfaceNumber        = 0,
+			.AlternateSetting       = 0,
+
+			.TotalEndpoints         = 1,
+
+			.Class                  = CDC_CSCP_CDCClass,
+			.SubClass               = CDC_CSCP_ACMSubclass,
+			.Protocol               = CDC_CSCP_ATCommandProtocol,
+
+			.InterfaceStrIndex      = NO_DESCRIPTOR
+		},
+
+	.CDC_Functional_Header =
+		{
+			.Header                 = {.Size = sizeof(USB_CDC_Descriptor_FunctionalHeader_t), .Type = DTYPE_CSInterface},
+			.Subtype                = 0x00,
+
+			.CDCSpecification       = VERSION_BCD(01.10),
+		},
+
+	.CDC_Functional_ACM =
+		{
+			.Header                 = {.Size = sizeof(USB_CDC_Descriptor_FunctionalACM_t), .Type = DTYPE_CSInterface},
+			.Subtype                = 0x02,
+
+			.Capabilities           = 0x04,
+		},
+
+	.CDC_Functional_Union =
+		{
+			.Header                 = {.Size = sizeof(USB_CDC_Descriptor_FunctionalUnion_t), .Type = DTYPE_CSInterface},
+			.Subtype                = 0x06,
+
+			.MasterInterfaceNumber  = 0,
+			.SlaveInterfaceNumber   = 1,
+		},
+
+	.CDC_NotificationEndpoint =
+		{
+			.Header                 = {.Size = sizeof(USB_Descriptor_Endpoint_t), .Type = DTYPE_Endpoint},
+
+			.EndpointAddress        = (ENDPOINT_DIR_IN | CDC_NOTIFICATION_EPNUM),
+			.Attributes             = (EP_TYPE_INTERRUPT | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
+			.EndpointSize           = CDC_NOTIFICATION_EPSIZE,
+			.PollingIntervalMS      = 0xFF
+		},
+
+	.CDC_DCI_Interface =
+		{
+			.Header                 = {.Size = sizeof(USB_Descriptor_Interface_t), .Type = DTYPE_Interface},
+
+			.InterfaceNumber        = 1,
+			.AlternateSetting       = 0,
+
+			.TotalEndpoints         = 2,
+
+			.Class                  = CDC_CSCP_CDCDataClass,
+			.SubClass               = CDC_CSCP_NoDataSubclass,
+			.Protocol               = CDC_CSCP_NoDataProtocol,
+
+			.InterfaceStrIndex      = NO_DESCRIPTOR
+		},
+
+	.CDC_DataOutEndpoint =
+		{
+			.Header                 = {.Size = sizeof(USB_Descriptor_Endpoint_t), .Type = DTYPE_Endpoint},
+
+			.EndpointAddress        = (ENDPOINT_DIR_OUT | CDC_RX_EPNUM),
+			.Attributes             = (EP_TYPE_BULK | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
+			.EndpointSize           = CDC_TXRX_EPSIZE,
+			.PollingIntervalMS      = 0x01
+		},
+
+	.CDC_DataInEndpoint =
+		{
+			.Header                 = {.Size = sizeof(USB_Descriptor_Endpoint_t), .Type = DTYPE_Endpoint},
+
+			.EndpointAddress        = (ENDPOINT_DIR_IN | CDC_TX_EPNUM),
+			.Attributes             = (EP_TYPE_BULK | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
+			.EndpointSize           = CDC_TXRX_EPSIZE,
+			.PollingIntervalMS      = 0x01
+		}
+};
+
+/** Language descriptor structure. This descriptor, located in SRAM memory, is returned when the host requests
+ *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
+ *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
+ */
+const USB_Descriptor_String_t LanguageString =
+{
+	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
+
+	.UnicodeString          = {LANGUAGE_ID_ENG}
+};
+
+/** Product descriptor string. This is a Unicode string containing the product's details in human readable form,
+ *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
+ *  Descriptor.
+ */
+const USB_Descriptor_String_t ProductString =
+{
+	.Header                 = {.Size = USB_STRING_LEN(16), .Type = DTYPE_String},
+
+	#if DEVICE_PID == 0x0036
+	.UnicodeString          = L"Arduino Leonardo" 
+	#else
+	.UnicodeString			= L"USB IO board    "
+	#endif
+};
+
+const USB_Descriptor_String_t ManufNameString = 
+{
+	.Header					= {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
+	
+	#if DEVICE_VID == 0x2341
+	.UnicodeString			= L"Arduino LLC"
+	#else
+	.UnicodeString			= L"Unknown    "
+	#endif
+};
+
+/** This function is called by the library when in device mode, and must be overridden (see LUFA library "USB Descriptors"
+ *  documentation) by the application code so that the address and size of a requested descriptor can be given
+ *  to the USB library. When the device receives a Get Descriptor request on the control endpoint, this function
+ *  is called so that the descriptor details can be passed back and the appropriate descriptor sent back to the
+ *  USB host.
+ */
+uint16_t CALLBACK_USB_GetDescriptor(const uint16_t wValue,
+                                    const uint8_t wIndex,
+                                    const void** const DescriptorAddress)
+{
+	const uint8_t  DescriptorType   = (wValue >> 8);
+	const uint8_t  DescriptorNumber = (wValue & 0xFF);
+
+	const void* Address = NULL;
+	uint16_t    Size    = NO_DESCRIPTOR;
+
+	switch (DescriptorType)
+	{
+		case DTYPE_Device:
+			Address = &DeviceDescriptor;
+			Size    = sizeof(USB_Descriptor_Device_t);
+			break;
+		case DTYPE_Configuration:
+			Address = &ConfigurationDescriptor;
+			Size    = sizeof(USB_Descriptor_Configuration_t);
+			break;
+		case DTYPE_String:
+			if (!(DescriptorNumber))
+			{
+				Address = &LanguageString;
+				Size    = LanguageString.Header.Size;
+			}
+			else if (DescriptorNumber == DeviceDescriptor.ProductStrIndex) 
+			{
+				Address = &ProductString;
+				Size    = ProductString.Header.Size;
+			} else if (DescriptorNumber == DeviceDescriptor.ManufacturerStrIndex)
+			{
+				Address = &ManufNameString;
+				Size	= ManufNameString.Header.Size;
+			}
+
+			break;
+	}
+
+	*DescriptorAddress = Address;
+	return Size;
+}
+
diff --git a/arduino/bootloaders/caterina/Descriptors.h b/arduino/bootloaders/caterina/Descriptors.h
new file mode 100755
index 0000000..94091ae
--- /dev/null
+++ b/arduino/bootloaders/caterina/Descriptors.h
@@ -0,0 +1,139 @@
+/*
+             LUFA Library
+     Copyright (C) Dean Camera, 2011.
+
+  dean [at] fourwalledcubicle [dot] com
+           www.lufa-lib.org
+*/
+
+/*
+  Copyright 2011  Dean Camera (dean [at] fourwalledcubicle [dot] com)
+
+  Permission to use, copy, modify, distribute, and sell this
+  software and its documentation for any purpose is hereby granted
+  without fee, provided that the above copyright notice appear in
+  all copies and that both that the copyright notice and this
+  permission notice and warranty disclaimer appear in supporting
+  documentation, and that the name of the author not be used in
+  advertising or publicity pertaining to distribution of the
+  software without specific, written prior permission.
+
+  The author disclaim all warranties with regard to this
+  software, including all implied warranties of merchantability
+  and fitness.  In no event shall the author be liable for any
+  special, indirect or consequential damages or any damages
+  whatsoever resulting from loss of use, data or profits, whether
+  in an action of contract, negligence or other tortious action,
+  arising out of or in connection with the use or performance of
+  this software.
+*/
+
+/** \file
+ *
+ *  Header file for Descriptors.c.
+ */
+
+#ifndef _DESCRIPTORS_H_
+#define _DESCRIPTORS_H_
+
+	/* Includes: */
+		#include <LUFA/Drivers/USB/USB.h>
+
+	/* Macros: */
+		#if defined(__AVR_AT90USB1287__)
+			#define AVR_SIGNATURE_1               0x1E
+			#define AVR_SIGNATURE_2               0x97
+			#define AVR_SIGNATURE_3               0x82
+		#elif defined(__AVR_AT90USB647__)
+			#define AVR_SIGNATURE_1               0x1E
+			#define AVR_SIGNATURE_2               0x96
+			#define AVR_SIGNATURE_3               0x82
+		#elif defined(__AVR_AT90USB1286__)
+			#define AVR_SIGNATURE_1               0x1E
+			#define AVR_SIGNATURE_2               0x97
+			#define AVR_SIGNATURE_3               0x82
+		#elif defined(__AVR_AT90USB646__)
+			#define AVR_SIGNATURE_1               0x1E
+			#define AVR_SIGNATURE_2               0x96
+			#define AVR_SIGNATURE_3               0x82
+		#elif defined(__AVR_ATmega32U6__)
+			#define AVR_SIGNATURE_1               0x1E
+			#define AVR_SIGNATURE_2               0x95
+			#define AVR_SIGNATURE_3               0x88
+		#elif defined(__AVR_ATmega32U4__)
+			#define AVR_SIGNATURE_1               0x1E
+			#define AVR_SIGNATURE_2               0x95
+			#define AVR_SIGNATURE_3               0x87
+		#elif defined(__AVR_ATmega16U4__)
+			#define AVR_SIGNATURE_1               0x1E
+			#define AVR_SIGNATURE_2               0x94
+			#define AVR_SIGNATURE_3               0x88
+		#elif defined(__AVR_ATmega32U2__)
+			#define AVR_SIGNATURE_1               0x1E
+			#define AVR_SIGNATURE_2               0x95
+			#define AVR_SIGNATURE_3               0x8A
+		#elif defined(__AVR_ATmega16U2__)
+			#define AVR_SIGNATURE_1               0x1E
+			#define AVR_SIGNATURE_2               0x94
+			#define AVR_SIGNATURE_3               0x89
+		#elif defined(__AVR_AT90USB162__)
+			#define AVR_SIGNATURE_1               0x1E
+			#define AVR_SIGNATURE_2               0x94
+			#define AVR_SIGNATURE_3               0x82
+		#elif defined(__AVR_ATmega8U2__)
+			#define AVR_SIGNATURE_1               0x1E
+			#define AVR_SIGNATURE_2               0x93
+			#define AVR_SIGNATURE_3               0x89
+		#elif defined(__AVR_AT90USB82__)
+			#define AVR_SIGNATURE_1               0x1E
+			#define AVR_SIGNATURE_2               0x94
+			#define AVR_SIGNATURE_3               0x82
+		#else
+			#error The selected AVR part is not currently supported by this bootloader.
+		#endif
+
+		/** Endpoint number for the CDC control interface event notification endpoint. */
+		#define CDC_NOTIFICATION_EPNUM         2
+
+		/** Endpoint number for the CDC data interface TX (data IN) endpoint. */
+		#define CDC_TX_EPNUM                   3
+
+		/** Endpoint number for the CDC data interface RX (data OUT) endpoint. */
+		#define CDC_RX_EPNUM                   4
+
+		/** Size of the CDC data interface TX and RX data endpoint banks, in bytes. */
+		#define CDC_TXRX_EPSIZE                16
+
+		/** Size of the CDC control interface notification endpoint bank, in bytes. */
+		#define CDC_NOTIFICATION_EPSIZE        8
+
+	/* Type Defines: */
+		/** Type define for the device configuration descriptor structure. This must be defined in the
+		 *  application code, as the configuration descriptor contains several sub-descriptors which
+		 *  vary between devices, and which describe the device's usage to the host.
+		 */
+		typedef struct
+		{
+			USB_Descriptor_Configuration_Header_t    Config;
+			
+			// CDC Control Interface
+			USB_Descriptor_Interface_t               CDC_CCI_Interface;
+			USB_CDC_Descriptor_FunctionalHeader_t    CDC_Functional_Header;
+			USB_CDC_Descriptor_FunctionalACM_t       CDC_Functional_ACM;
+			USB_CDC_Descriptor_FunctionalUnion_t     CDC_Functional_Union;
+			USB_Descriptor_Endpoint_t                CDC_NotificationEndpoint;
+			
+			// CDC Data Interface
+			USB_Descriptor_Interface_t               CDC_DCI_Interface;
+			USB_Descriptor_Endpoint_t                CDC_DataOutEndpoint;
+			USB_Descriptor_Endpoint_t                CDC_DataInEndpoint;
+		} USB_Descriptor_Configuration_t;
+
+	/* Function Prototypes: */
+		uint16_t CALLBACK_USB_GetDescriptor(const uint16_t wValue,
+		                                    const uint8_t wIndex,
+		                                    const void** const DescriptorAddress)
+		                                    ATTR_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(3);
+
+#endif
+
diff --git a/arduino/bootloaders/caterina/Makefile b/arduino/bootloaders/caterina/Makefile
new file mode 100755
index 0000000..873f8bd
--- /dev/null
+++ b/arduino/bootloaders/caterina/Makefile
@@ -0,0 +1,728 @@
+# Hey Emacs, this is a -*- makefile -*-
+#----------------------------------------------------------------------------
+# WinAVR Makefile Template written by Eric B. Weddington, JöWunsch, et al.
+#  >> Modified for use with the LUFA project. <<
+#
+# Released to the Public Domain
+#
+# Additional material for this makefile was written by:
+# Peter Fleury
+# Tim Henigan
+# Colin O'Flynn
+# Reiner Patommel
+# Markus Pfaff
+# Sander Pool
+# Frederik Rouleau
+# Carlos Lamas
+# Dean Camera
+# Opendous Inc.
+# Denver Gingerich
+#
+#----------------------------------------------------------------------------
+# On command line:
+#
+# make all = Make software.
+#
+# make clean = Clean out built project files.
+#
+# make coff = Convert ELF to AVR COFF.
+#
+# make extcoff = Convert ELF to AVR Extended COFF.
+#
+# make program = Download the hex file to the device, using avrdude.
+#                Please customize the avrdude settings below first!
+#
+# make doxygen = Generate DoxyGen documentation for the project (must have
+#                DoxyGen installed)
+#
+# make debug = Start either simulavr or avarice as specified for debugging,
+#              with avr-gdb or avr-insight as the front end for debugging.
+#
+# make filename.s = Just compile filename.c into the assembler code only.
+#
+# make filename.i = Create a preprocessed source file for use in submitting
+#                   bug reports to the GCC project.
+#
+# To rebuild project do "make clean" then "make all".
+#----------------------------------------------------------------------------
+
+# USB vendor ID (VID)
+# official Arduino LLC VID
+# VID = 0x2341
+
+
+# USB product ID (PID)
+# official Leonardo PID
+# PID = 0x0036
+
+
+# MCU name
+MCU = atmega32u4
+
+
+# Target architecture (see library "Board Types" documentation).
+ARCH = AVR8
+
+
+# Target board (see library "Board Types" documentation, NONE for projects not requiring
+# LUFA board drivers). If USER is selected, put custom board drivers in a directory called
+# "Board" inside the application directory.
+BOARD = USER
+
+
+# Processor frequency.
+#     This will define a symbol, F_CPU, in all source code files equal to the
+#     processor frequency in Hz. You can then use this symbol in your source code to
+#     calculate timings. Do NOT tack on a 'UL' at the end, this will be done
+#     automatically to create a 32-bit value in your source code.
+#
+#     This will be an integer division of F_USB below, as it is sourced by
+#     F_USB after it has run through any CPU prescalers. Note that this value
+#     does not *change* the processor frequency - it should merely be updated to
+#     reflect the processor speed set externally so that the code can use accurate
+#     software delays.
+F_CPU = 16000000
+
+
+# Input clock frequency.
+#     This will define a symbol, F_USB, in all source code files equal to the
+#     input clock frequency (before any prescaling is performed) in Hz. This value may
+#     differ from F_CPU if prescaling is used on the latter, and is required as the
+#     raw input clock is fed directly to the PLL sections of the AVR for high speed
+#     clock generation for the USB and other AVR subsections. Do NOT tack on a 'UL'
+#     at the end, this will be done automatically to create a 32-bit value in your
+#     source code.
+#
+#     If no clock division is performed on the input clock inside the AVR (via the
+#     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
+F_USB = $(F_CPU)
+
+
+# Starting byte address of the bootloader, as a byte address - computed via the formula
+#   BOOT_START = ((FLASH_SIZE_KB - BOOT_SECTION_SIZE_KB) * 1024)
+#
+# Note that the bootloader size and start address given in AVRStudio is in words and not
+# bytes, and so will need to be doubled to obtain the byte address needed by AVR-GCC.
+FLASH_SIZE_KB        = 32
+BOOT_SECTION_SIZE_KB = 4
+BOOT_START           = 0x$(shell echo "obase=16; ($(FLASH_SIZE_KB) - $(BOOT_SECTION_SIZE_KB)) * 1024" | bc)
+
+
+# Output format. (can be srec, ihex, binary)
+FORMAT = ihex
+
+
+# Target file name (without extension).
+TARGET = Caterina
+
+
+# Object files directory
+#     To put object files in current directory, use a dot (.), do NOT make
+#     this an empty or blank macro!
+OBJDIR = .
+
+
+# Path to the LUFA library
+LUFA_PATH = ../../../../../LUFA-111009
+
+
+# LUFA library compile-time options and predefined tokens
+LUFA_OPTS  = -D USB_DEVICE_ONLY
+LUFA_OPTS += -D DEVICE_STATE_AS_GPIOR=0
+LUFA_OPTS += -D ORDERED_EP_CONFIG
+LUFA_OPTS += -D FIXED_CONTROL_ENDPOINT_SIZE=8
+LUFA_OPTS += -D FIXED_NUM_CONFIGURATIONS=1
+LUFA_OPTS += -D USE_RAM_DESCRIPTORS
+LUFA_OPTS += -D USE_STATIC_OPTIONS="(USB_DEVICE_OPT_FULLSPEED | USB_OPT_REG_ENABLED | USB_OPT_AUTO_PLL)"
+LUFA_OPTS += -D NO_INTERNAL_SERIAL
+LUFA_OPTS += -D NO_DEVICE_SELF_POWER
+LUFA_OPTS += -D NO_DEVICE_REMOTE_WAKEUP
+LUFA_OPTS += -D NO_SOF_EVENTS
+
+#LUFA_OPTS += -D NO_BLOCK_SUPPORT
+#LUFA_OPTS += -D NO_EEPROM_BYTE_SUPPORT
+#LUFA_OPTS += -D NO_FLASH_BYTE_SUPPORT
+LUFA_OPTS += -D NO_LOCK_BYTE_WRITE_SUPPORT
+
+
+# Create the LUFA source path variables by including the LUFA root makefile
+include $(LUFA_PATH)/LUFA/makefile
+
+
+# List C source files here. (C dependencies are automatically generated.)
+SRC = $(TARGET).c                                                 \
+	  Descriptors.c                                               \
+	  $(LUFA_SRC_USB)                                             \
+
+
+# List C++ source files here. (C dependencies are automatically generated.)
+CPPSRC =
+
+
+# List Assembler source files here.
+#     Make them always end in a capital .S.  Files ending in a lowercase .s
+#     will not be considered source files but generated files (assembler
+#     output from the compiler), and will be deleted upon "make clean"!
+#     Even though the DOS/Win* filesystem matches both .s and .S the same,
+#     it will preserve the spelling of the filenames, and gcc itself does
+#     care about how the name is spelled on its command-line.
+ASRC =
+
+
+# Optimization level, can be [0, 1, 2, 3, s].
+#     0 = turn off optimization. s = optimize for size.
+#     (Note: 3 is not always the best optimization level. See avr-libc FAQ.)
+OPT = s
+
+
+# Debugging format.
+#     Native formats for AVR-GCC's -g are dwarf-2 [default] or stabs.
+#     AVR Studio 4.10 requires dwarf-2.
+#     AVR [Extended] COFF format requires stabs, plus an avr-objcopy run.
+DEBUG = dwarf-2
+
+
+# List any extra directories to look for include files here.
+#     Each directory must be seperated by a space.
+#     Use forward slashes for directory separators.
+#     For a directory that has spaces, enclose it in quotes.
+EXTRAINCDIRS = $(LUFA_PATH)/
+
+
+# Compiler flag to set the C Standard level.
+#     c89   = "ANSI" C
+#     gnu89 = c89 plus GCC extensions
+#     c99   = ISO C99 standard (not yet fully implemented)
+#     gnu99 = c99 plus GCC extensions
+CSTANDARD = -std=c99
+
+
+# Place -D or -U options here for C sources
+CDEFS  = -DF_CPU=$(F_CPU)UL
+CDEFS += -DF_USB=$(F_USB)UL
+CDEFS += -DBOARD=BOARD_$(BOARD) -DARCH=ARCH_$(ARCH)
+CDEFS += -DBOOT_START_ADDR=$(BOOT_START)UL
+CDEFS += -DDEVICE_VID=$(VID)UL
+CDEFS += -DDEVICE_PID=$(PID)UL
+CDEFS += $(LUFA_OPTS)
+
+
+# Place -D or -U options here for ASM sources
+ADEFS  = -DF_CPU=$(F_CPU)
+ADEFS += -DF_USB=$(F_USB)UL
+ADEFS += -DBOARD=BOARD_$(BOARD)
+ADEFS += -DBOOT_START_ADDR=$(BOOT_START)UL
+ADEFS += $(LUFA_OPTS)
+
+
+# Place -D or -U options here for C++ sources
+CPPDEFS  = -DF_CPU=$(F_CPU)UL
+CPPDEFS += -DF_USB=$(F_USB)UL
+CPPDEFS += -DBOARD=BOARD_$(BOARD)
+CPPDEFS += -DBOOT_START_ADDR=$(BOOT_START)UL
+CPPDEFS += $(LUFA_OPTS)
+#CPPDEFS += -D__STDC_LIMIT_MACROS
+#CPPDEFS += -D__STDC_CONSTANT_MACROS
+
+
+
+#---------------- Compiler Options C ----------------
+#  -g*:          generate debugging information
+#  -O*:          optimization level
+#  -f...:        tuning, see GCC manual and avr-libc documentation
+#  -Wall...:     warning level
+#  -Wa,...:      tell GCC to pass this to the assembler.
+#    -adhlns...: create assembler listing
+CFLAGS = -g$(DEBUG)
+CFLAGS += $(CDEFS)
+CFLAGS += -O$(OPT)
+CFLAGS += -funsigned-char
+CFLAGS += -funsigned-bitfields
+CFLAGS += -ffunction-sections
+CFLAGS += -fno-inline-small-functions
+CFLAGS += -fpack-struct
+CFLAGS += -fshort-enums
+CFLAGS += -fno-strict-aliasing
+CFLAGS += -Wall
+CFLAGS += -Wstrict-prototypes
+#CFLAGS += -mshort-calls
+#CFLAGS += -fno-unit-at-a-time
+#CFLAGS += -Wundef
+#CFLAGS += -Wunreachable-code
+#CFLAGS += -Wsign-compare
+CFLAGS += -Wa,-adhlns=$(<:%.c=$(OBJDIR)/%.lst)
+CFLAGS += $(patsubst %,-I%,$(EXTRAINCDIRS))
+CFLAGS += $(CSTANDARD)
+
+
+#---------------- Compiler Options C++ ----------------
+#  -g*:          generate debugging information
+#  -O*:          optimization level
+#  -f...:        tuning, see GCC manual and avr-libc documentation
+#  -Wall...:     warning level
+#  -Wa,...:      tell GCC to pass this to the assembler.
+#    -adhlns...: create assembler listing
+CPPFLAGS = -g$(DEBUG)
+CPPFLAGS += $(CPPDEFS)
+CPPFLAGS += -O$(OPT)
+CPPFLAGS += -funsigned-char
+CPPFLAGS += -funsigned-bitfields
+CPPFLAGS += -fpack-struct
+CPPFLAGS += -fshort-enums
+CPPFLAGS += -fno-exceptions
+CPPFLAGS += -Wall
+CPPFLAGS += -Wundef
+#CPPFLAGS += -mshort-calls
+#CPPFLAGS += -fno-unit-at-a-time
+#CPPFLAGS += -Wstrict-prototypes
+#CPPFLAGS += -Wunreachable-code
+#CPPFLAGS += -Wsign-compare
+CPPFLAGS += -Wa,-adhlns=$(<:%.cpp=$(OBJDIR)/%.lst)
+CPPFLAGS += $(patsubst %,-I%,$(EXTRAINCDIRS))
+#CPPFLAGS += $(CSTANDARD)
+
+
+#---------------- Assembler Options ----------------
+#  -Wa,...:   tell GCC to pass this to the assembler.
+#  -adhlns:   create listing
+#  -gstabs:   have the assembler create line number information; note that
+#             for use in COFF files, additional information about filenames
+#             and function names needs to be present in the assembler source
+#             files -- see avr-libc docs [FIXME: not yet described there]
+#  -listing-cont-lines: Sets the maximum number of continuation lines of hex
+#       dump that will be displayed for a given single line of source input.
+ASFLAGS = $(ADEFS) -Wa,-adhlns=$(<:%.S=$(OBJDIR)/%.lst),-gstabs,--listing-cont-lines=100
+
+
+#---------------- Library Options ----------------
+# Minimalistic printf version
+PRINTF_LIB_MIN = -Wl,-u,vfprintf -lprintf_min
+
+# Floating point printf version (requires MATH_LIB = -lm below)
+PRINTF_LIB_FLOAT = -Wl,-u,vfprintf -lprintf_flt
+
+# If this is left blank, then it will use the Standard printf version.
+PRINTF_LIB =
+#PRINTF_LIB = $(PRINTF_LIB_MIN)
+#PRINTF_LIB = $(PRINTF_LIB_FLOAT)
+
+
+# Minimalistic scanf version
+SCANF_LIB_MIN = -Wl,-u,vfscanf -lscanf_min
+
+# Floating point + %[ scanf version (requires MATH_LIB = -lm below)
+SCANF_LIB_FLOAT = -Wl,-u,vfscanf -lscanf_flt
+
+# If this is left blank, then it will use the Standard scanf version.
+SCANF_LIB =
+#SCANF_LIB = $(SCANF_LIB_MIN)
+#SCANF_LIB = $(SCANF_LIB_FLOAT)
+
+
+MATH_LIB = -lm
+
+
+# List any extra directories to look for libraries here.
+#     Each directory must be seperated by a space.
+#     Use forward slashes for directory separators.
+#     For a directory that has spaces, enclose it in quotes.
+EXTRALIBDIRS =
+
+
+
+#---------------- External Memory Options ----------------
+
+# 64 KB of external RAM, starting after internal RAM (ATmega128!),
+# used for variables (.data/.bss) and heap (malloc()).
+#EXTMEMOPTS = -Wl,-Tdata=0x801100,--defsym=__heap_end=0x80ffff
+
+# 64 KB of external RAM, starting after internal RAM (ATmega128!),
+# only used for heap (malloc()).
+#EXTMEMOPTS = -Wl,--section-start,.data=0x801100,--defsym=__heap_end=0x80ffff
+
+EXTMEMOPTS =
+
+
+
+#---------------- Linker Options ----------------
+#  -Wl,...:     tell GCC to pass this to linker.
+#    -Map:      create map file
+#    --cref:    add cross reference to  map file
+LDFLAGS  = -Wl,-Map=$(TARGET).map,--cref
+LDFLAGS += -Wl,--section-start=.text=$(BOOT_START)
+LDFLAGS += -Wl,--relax
+LDFLAGS += -Wl,--gc-sections
+LDFLAGS += $(EXTMEMOPTS)
+LDFLAGS += $(patsubst %,-L%,$(EXTRALIBDIRS))
+LDFLAGS += $(PRINTF_LIB) $(SCANF_LIB) $(MATH_LIB)
+#LDFLAGS += -T linker_script.x
+
+
+
+#---------------- Programming Options (avrdude) ----------------
+
+# Programming hardware
+# Type: avrdude -c ?
+# to get a full listing.
+#
+AVRDUDE_PROGRAMMER = avrispmkII
+
+# com1 = serial port. Use lpt1 to connect to parallel port.
+AVRDUDE_PORT = usb
+
+AVRDUDE_WRITE_FLASH = -U flash:w:$(TARGET).hex
+#AVRDUDE_WRITE_EEPROM = -U eeprom:w:$(TARGET).eep
+
+
+# Uncomment the following if you want avrdude's erase cycle counter.
+# Note that this counter needs to be initialized first using -Yn,
+# see avrdude manual.
+#AVRDUDE_ERASE_COUNTER = -y
+
+# Uncomment the following if you do /not/ wish a verification to be
+# performed after programming the device.
+#AVRDUDE_NO_VERIFY = -V
+
+# Increase verbosity level.  Please use this when submitting bug
+# reports about avrdude. See <http://savannah.nongnu.org/projects/avrdude>
+# to submit bug reports.
+#AVRDUDE_VERBOSE = -v -v
+
+AVRDUDE_FLAGS = -p $(MCU) -P $(AVRDUDE_PORT) -c $(AVRDUDE_PROGRAMMER)
+AVRDUDE_FLAGS += $(AVRDUDE_NO_VERIFY)
+AVRDUDE_FLAGS += $(AVRDUDE_VERBOSE)
+AVRDUDE_FLAGS += $(AVRDUDE_ERASE_COUNTER)
+
+
+
+#---------------- Debugging Options ----------------
+
+# For simulavr only - target MCU frequency.
+DEBUG_MFREQ = $(F_CPU)
+
+# Set the DEBUG_UI to either gdb or insight.
+# DEBUG_UI = gdb
+DEBUG_UI = insight
+
+# Set the debugging back-end to either avarice, simulavr.
+DEBUG_BACKEND = avarice
+#DEBUG_BACKEND = simulavr
+
+# GDB Init Filename.
+GDBINIT_FILE = __avr_gdbinit
+
+# When using avarice settings for the JTAG
+JTAG_DEV = /dev/com1
+
+# Debugging port used to communicate between GDB / avarice / simulavr.
+DEBUG_PORT = 4242
+
+# Debugging host used to communicate between GDB / avarice / simulavr, normally
+#     just set to localhost unless doing some sort of crazy debugging when
+#     avarice is running on a different computer.
+DEBUG_HOST = localhost
+
+
+
+#============================================================================
+
+
+# Define programs and commands.
+SHELL = sh
+CC = avr-gcc
+OBJCOPY = avr-objcopy
+OBJDUMP = avr-objdump
+SIZE = avr-size
+AR = avr-ar rcs
+NM = avr-nm
+AVRDUDE = /Applications/avrdude -C /Applications/avrdude.conf -B 1
+REMOVE = rm -f
+REMOVEDIR = rm -rf
+COPY = cp
+WINSHELL = cmd
+
+
+# Define Messages
+# English
+MSG_ERRORS_NONE = Errors: none
+MSG_BEGIN = -------- begin --------
+MSG_END = --------  end  --------
+MSG_SIZE_BEFORE = Size before:
+MSG_SIZE_AFTER = Size after:
+MSG_COFF = Converting to AVR COFF:
+MSG_EXTENDED_COFF = Converting to AVR Extended COFF:
+MSG_FLASH = Creating load file for Flash:
+MSG_EEPROM = Creating load file for EEPROM:
+MSG_EXTENDED_LISTING = Creating Extended Listing:
+MSG_SYMBOL_TABLE = Creating Symbol Table:
+MSG_LINKING = Linking:
+MSG_COMPILING = Compiling C:
+MSG_COMPILING_CPP = Compiling C++:
+MSG_ASSEMBLING = Assembling:
+MSG_CLEANING = Cleaning project:
+MSG_CREATING_LIBRARY = Creating library:
+
+
+
+
+# Define all object files.
+OBJ = $(SRC:%.c=$(OBJDIR)/%.o) $(CPPSRC:%.cpp=$(OBJDIR)/%.o) $(ASRC:%.S=$(OBJDIR)/%.o)
+
+# Define all listing files.
+LST = $(SRC:%.c=$(OBJDIR)/%.lst) $(CPPSRC:%.cpp=$(OBJDIR)/%.lst) $(ASRC:%.S=$(OBJDIR)/%.lst)
+
+
+# Compiler flags to generate dependency files.
+GENDEPFLAGS = -MMD -MP -MF .dep/$(@F).d
+
+
+# Combine all necessary flags and optional flags.
+# Add target processor to flags.
+ALL_CFLAGS = -mmcu=$(MCU) -I. $(CFLAGS) $(GENDEPFLAGS)
+ALL_CPPFLAGS = -mmcu=$(MCU) -I. -x c++ $(CPPFLAGS) $(GENDEPFLAGS)
+ALL_ASFLAGS = -mmcu=$(MCU) -I. -x assembler-with-cpp $(ASFLAGS)
+
+
+
+
+
+# Default target.
+all: begin gccversion sizebefore build sizeafter end
+
+# Change the build target to build a HEX file or a library.
+build: elf hex eep lss sym
+#build: lib
+
+
+elf: $(TARGET).elf
+hex: $(TARGET).hex
+eep: $(TARGET).eep
+lss: $(TARGET).lss
+sym: $(TARGET).sym
+LIBNAME=lib$(TARGET).a
+lib: $(LIBNAME)
+
+
+
+# Eye candy.
+# AVR Studio 3.x does not check make's exit code but relies on
+# the following magic strings to be generated by the compile job.
+begin:
+	@echo
+	@echo $(MSG_BEGIN)
+
+end:
+	@echo $(MSG_END)
+	@echo
+
+
+# Display size of file.
+HEXSIZE = $(SIZE) --target=$(FORMAT) $(TARGET).hex
+ELFSIZE = $(SIZE) $(MCU_FLAG) $(FORMAT_FLAG) $(TARGET).elf
+MCU_FLAG = $(shell $(SIZE) --help | grep -- --mcu > /dev/null && echo --mcu=$(MCU) )
+FORMAT_FLAG = $(shell $(SIZE) --help | grep -- --format=.*avr > /dev/null && echo --format=avr )
+
+
+sizebefore:
+	@if test -f $(TARGET).elf; then echo; echo $(MSG_SIZE_BEFORE); $(ELFSIZE); \
+	2>/dev/null; echo; fi
+
+sizeafter:
+	@if test -f $(TARGET).elf; then echo; echo $(MSG_SIZE_AFTER); $(ELFSIZE); \
+	2>/dev/null; echo; fi
+
+
+
+# Display compiler version information.
+gccversion :
+	@$(CC) --version
+
+
+# Program the device.
+program: $(TARGET).hex $(TARGET).eep
+	$(AVRDUDE) $(AVRDUDE_FLAGS) $(AVRDUDE_WRITE_FLASH) $(AVRDUDE_WRITE_EEPROM)
+
+
+# Generate avr-gdb config/init file which does the following:
+#     define the reset signal, load the target file, connect to target, and set
+#     a breakpoint at main().
+gdb-config:
+	@$(REMOVE) $(GDBINIT_FILE)
+	@echo define reset >> $(GDBINIT_FILE)
+	@echo SIGNAL SIGHUP >> $(GDBINIT_FILE)
+	@echo end >> $(GDBINIT_FILE)
+	@echo file $(TARGET).elf >> $(GDBINIT_FILE)
+	@echo target remote $(DEBUG_HOST):$(DEBUG_PORT)  >> $(GDBINIT_FILE)
+ifeq ($(DEBUG_BACKEND),simulavr)
+	@echo load  >> $(GDBINIT_FILE)
+endif
+	@echo break main >> $(GDBINIT_FILE)
+
+debug: gdb-config $(TARGET).elf
+ifeq ($(DEBUG_BACKEND), avarice)
+	@echo Starting AVaRICE - Press enter when "waiting to connect" message displays.
+	@$(WINSHELL) /c start avarice --jtag $(JTAG_DEV) --erase --program --file \
+	$(TARGET).elf $(DEBUG_HOST):$(DEBUG_PORT)
+	@$(WINSHELL) /c pause
+
+else
+	@$(WINSHELL) /c start simulavr --gdbserver --device $(MCU) --clock-freq \
+	$(DEBUG_MFREQ) --port $(DEBUG_PORT)
+endif
+	@$(WINSHELL) /c start avr-$(DEBUG_UI) --command=$(GDBINIT_FILE)
+
+
+
+
+# Convert ELF to COFF for use in debugging / simulating in AVR Studio or VMLAB.
+COFFCONVERT = $(OBJCOPY) --debugging
+COFFCONVERT += --change-section-address .data-0x800000
+COFFCONVERT += --change-section-address .bss-0x800000
+COFFCONVERT += --change-section-address .noinit-0x800000
+COFFCONVERT += --change-section-address .eeprom-0x810000
+
+
+
+coff: $(TARGET).elf
+	@echo
+	@echo $(MSG_COFF) $(TARGET).cof
+	$(COFFCONVERT) -O coff-avr $< $(TARGET).cof
+
+
+extcoff: $(TARGET).elf
+	@echo
+	@echo $(MSG_EXTENDED_COFF) $(TARGET).cof
+	$(COFFCONVERT) -O coff-ext-avr $< $(TARGET).cof
+
+
+
+# Create final output files (.hex, .eep) from ELF output file.
+%.hex: %.elf
+	@echo
+	@echo $(MSG_FLASH) $@
+	$(OBJCOPY) -O $(FORMAT) -R .eeprom -R .fuse -R .lock $< $@
+
+%.eep: %.elf
+	@echo
+	@echo $(MSG_EEPROM) $@
+	-$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load" \
+	--change-section-lma .eeprom=0 --no-change-warnings -O $(FORMAT) $< $@ || exit 0
+
+# Create extended listing file from ELF output file.
+%.lss: %.elf
+	@echo
+	@echo $(MSG_EXTENDED_LISTING) $@
+	$(OBJDUMP) -h -S -z $< > $@
+
+# Create a symbol table from ELF output file.
+%.sym: %.elf
+	@echo
+	@echo $(MSG_SYMBOL_TABLE) $@
+	$(NM) -n $< > $@
+
+
+
+# Create library from object files.
+.SECONDARY : $(TARGET).a
+.PRECIOUS : $(OBJ)
+%.a: $(OBJ)
+	@echo
+	@echo $(MSG_CREATING_LIBRARY) $@
+	$(AR) $@ $(OBJ)
+
+
+# Link: create ELF output file from object files.
+.SECONDARY : $(TARGET).elf
+.PRECIOUS : $(OBJ)
+%.elf: $(OBJ)
+	@echo
+	@echo $(MSG_LINKING) $@
+	$(CC) $(ALL_CFLAGS) $^ --output $@ $(LDFLAGS)
+
+
+# Compile: create object files from C source files.
+$(OBJDIR)/%.o : %.c
+	@echo
+	@echo $(MSG_COMPILING) $<
+	$(CC) -c $(ALL_CFLAGS) $< -o $@
+
+
+# Compile: create object files from C++ source files.
+$(OBJDIR)/%.o : %.cpp
+	@echo
+	@echo $(MSG_COMPILING_CPP) $<
+	$(CC) -c $(ALL_CPPFLAGS) $< -o $@
+
+
+# Compile: create assembler files from C source files.
+%.s : %.c
+	$(CC) -S $(ALL_CFLAGS) $< -o $@
+
+
+# Compile: create assembler files from C++ source files.
+%.s : %.cpp
+	$(CC) -S $(ALL_CPPFLAGS) $< -o $@
+
+
+# Assemble: create object files from assembler source files.
+$(OBJDIR)/%.o : %.S
+	@echo
+	@echo $(MSG_ASSEMBLING) $<
+	$(CC) -c $(ALL_ASFLAGS) $< -o $@
+
+
+# Create preprocessed source for use in sending a bug report.
+%.i : %.c
+	$(CC) -E -mmcu=$(MCU) -I. $(CFLAGS) $< -o $@
+
+
+# Target: clean project.
+clean: begin clean_list end
+
+clean_list :
+	@echo
+	@echo $(MSG_CLEANING)
+	$(REMOVE) $(TARGET).hex
+	$(REMOVE) $(TARGET).eep
+	$(REMOVE) $(TARGET).cof
+	$(REMOVE) $(TARGET).elf
+	$(REMOVE) $(TARGET).map
+	$(REMOVE) $(TARGET).sym
+	$(REMOVE) $(TARGET).lss
+	$(REMOVE) $(SRC:%.c=$(OBJDIR)/%.o) $(CPPSRC:%.cpp=$(OBJDIR)/%.o) $(ASRC:%.S=$(OBJDIR)/%.o)
+	$(REMOVE) $(SRC:%.c=$(OBJDIR)/%.lst) $(CPPSRC:%.cpp=$(OBJDIR)/%.lst) $(ASRC:%.S=$(OBJDIR)/%.lst)
+	$(REMOVE) $(SRC:.c=.s)
+	$(REMOVE) $(SRC:.c=.d)
+	$(REMOVE) $(SRC:.c=.i)
+	$(REMOVEDIR) .dep
+
+doxygen:
+	@echo Generating Project Documentation \($(TARGET)\)...
+	@doxygen Doxygen.conf
+	@echo Documentation Generation Complete.
+
+clean_doxygen:
+	rm -rf Documentation
+
+checksource:
+	@for f in $(SRC) $(CPPSRC) $(ASRC); do \
+		if [ -f $$f ]; then \
+			echo "Found Source File: $$f" ; \
+		else \
+			echo "Source File Not Found: $$f" ; \
+		fi; done 
+
+
+# Create object files directory
+$(shell mkdir $(OBJDIR) 2>/dev/null)
+
+
+# Include the dependency files.
+-include $(shell mkdir .dep 2>/dev/null) $(wildcard .dep/*)
+
+
+# Listing of phony targets.
+.PHONY : all begin finish end sizebefore sizeafter gccversion \
+build elf hex eep lss sym coff extcoff doxygen clean          \
+clean_list clean_doxygen program debug gdb-config checksource
+
diff --git a/arduino/cores/arduino/CDC.cpp b/arduino/cores/arduino/CDC.cpp
index 14a0eae..1ee3a48 100644
--- a/arduino/cores/arduino/CDC.cpp
+++ b/arduino/cores/arduino/CDC.cpp
@@ -23,12 +23,20 @@
 #if defined(USBCON)
 #ifdef CDC_ENABLED
 
-void Reboot()
+#if (RAMEND < 1000)
+#define SERIAL_BUFFER_SIZE 16
+#else
+#define SERIAL_BUFFER_SIZE 64
+#endif
+
+struct ring_buffer
 {
-	USB.detach();
-	cli();
-	asm volatile("jmp 0x7800");		// jump to bootloader - DiskLoader takes up last 2 kB
-}
+	unsigned char buffer[SERIAL_BUFFER_SIZE];
+	volatile int head;
+	volatile int tail;
+};
+
+ring_buffer cdc_rx_buffer = { { 0 }, 0, 0};
 
 typedef struct
 {
@@ -92,9 +100,28 @@ bool WEAK CDC_Setup(Setup& setup)
 
 		if (CDC_SET_CONTROL_LINE_STATE == r)
 		{
-			if (0 != _usbLineInfo.lineState && 1200 == _usbLineInfo.dwDTERate)	// auto-reset is triggered when the port, already open at 1200 bps, is closed
-				Reboot();
 			_usbLineInfo.lineState = setup.wValueL;
+
+			// auto-reset into the bootloader is triggered when the port, already 
+			// open at 1200 bps, is closed.  this is the signal to start the watchdog
+			// with a relatively long period so it can finish housekeeping tasks
+			// like servicing endpoints before the sketch ends
+			if (1200 == _usbLineInfo.dwDTERate) {
+				// We check DTR state to determine if host port is open (bit 0 of lineState).
+				if ((_usbLineInfo.lineState & 0x01) == 0) {
+					*(uint16_t *)0x0800 = 0x7777;
+					wdt_enable(WDTO_120MS);
+				} else {
+					// Most OSs do some intermediate steps when configuring ports and DTR can
+					// twiggle more than once before stabilizing.
+					// To avoid spurious resets we set the watchdog to 250ms and eventually
+					// cancel if DTR goes back high.
+	
+					wdt_disable();
+					wdt_reset();
+					*(uint16_t *)0x0800 = 0x0;
+				}
+			}
 			return true;
 		}
 	}
@@ -111,33 +138,49 @@ void Serial_::end(void)
 {
 }
 
+void Serial_::accept(void) 
+{
+	ring_buffer *buffer = &cdc_rx_buffer;
+	int c = USB_Recv(CDC_RX); 
+	int i = (unsigned int)(buffer->head+1) % SERIAL_BUFFER_SIZE;
+	
+	// if we should be storing the received character into the location
+	// just before the tail (meaning that the head would advance to the
+	// current location of the tail), we're about to overflow the buffer
+	// and so we don't write the character or advance the head.
+	if (i != buffer->tail) {
+		buffer->buffer[buffer->head] = c;
+		buffer->head = i;
+	}
+}
+
 int Serial_::available(void)
 {
-	u8 avail = USB_Available(CDC_RX);
-	if (_serialPeek != -1)
-		avail++;
-	return avail;
+	ring_buffer *buffer = &cdc_rx_buffer;
+	return (unsigned int)(SERIAL_BUFFER_SIZE + buffer->head - buffer->tail) % SERIAL_BUFFER_SIZE;
 }
 
-//	peek is nasty
 int Serial_::peek(void)
 {
-	if (_serialPeek == -1)
-		_serialPeek = read();
-	return _serialPeek;
+	ring_buffer *buffer = &cdc_rx_buffer;
+	if (buffer->head == buffer->tail) {
+		return -1;
+	} else {
+		return buffer->buffer[buffer->tail];
+	}
 }
 
 int Serial_::read(void)
 {
-	int c;
-	if (_serialPeek != -1)
-	{
-		c = _serialPeek;
-		_serialPeek = -1;
+	ring_buffer *buffer = &cdc_rx_buffer;
+	// if the head isn't ahead of the tail, we don't have any characters
+	if (buffer->head == buffer->tail) {
+		return -1;
 	} else {
-		c = USB_Recv(CDC_RX);
-	}
-	return c;
+		unsigned char c = buffer->buffer[buffer->tail];
+		buffer->tail = (unsigned int)(buffer->tail + 1) % SERIAL_BUFFER_SIZE;
+		return c;
+	}	
 }
 
 void Serial_::flush(void)
@@ -169,7 +212,22 @@ size_t Serial_::write(uint8_t c)
 	return 0;
 }
 
+// This operator is a convenient way for a sketch to check whether the
+// port has actually been configured and opened by the host (as opposed
+// to just being connected to the host).  It can be used, for example, in 
+// setup() before printing to ensure that an application on the host is
+// actually ready to receive and display the data.
+// We add a short delay before returning to fix a bug observed by Federico
+// where the port is configured (lineState != 0) but not quite opened.
+Serial_::operator bool() {
+	bool result = false;
+	if (_usbLineInfo.lineState > 0) 
+		result = true;
+	delay(10);
+	return result;
+}
+
 Serial_ Serial;
 
 #endif
-#endif /* if defined(USBCON) */
\ No newline at end of file
+#endif /* if defined(USBCON) */
diff --git a/arduino/cores/arduino/HID.cpp b/arduino/cores/arduino/HID.cpp
index 8ed1566..ac63608 100644
--- a/arduino/cores/arduino/HID.cpp
+++ b/arduino/cores/arduino/HID.cpp
@@ -144,7 +144,6 @@ u8 _hid_protocol = 1;
 u8 _hid_idle = 1;
 
 #define WEAK __attribute__ ((weak))
-#define WEAK 
 
 int WEAK HID_GetInterface(u8* interfaceNum)
 {
@@ -202,7 +201,15 @@ bool WEAK HID_Setup(Setup& setup)
 //================================================================================
 //	Mouse
 
-Mouse_::Mouse_() : _buttons(0)
+Mouse_::Mouse_(void) : _buttons(0)
+{
+}
+
+void Mouse_::begin(void) 
+{
+}
+
+void Mouse_::end(void) 
 {
 }
 
@@ -245,7 +252,7 @@ void Mouse_::release(uint8_t b)
 
 bool Mouse_::isPressed(uint8_t b)
 {
-	if (b & _buttons > 0) 
+	if ((b & _buttons) > 0) 
 		return true;
 	return false;
 }
@@ -254,18 +261,21 @@ bool Mouse_::isPressed(uint8_t b)
 //================================================================================
 //	Keyboard
 
-Keyboard_::Keyboard_() : _keyMap(0)
+Keyboard_::Keyboard_(void) 
 {
 }
 
-void Keyboard_::sendReport(KeyReport* keys)
+void Keyboard_::begin(void) 
+{
+}
+
+void Keyboard_::end(void) 
 {
-	HID_SendReport(2,keys,sizeof(KeyReport));
 }
 
-void Keyboard_::setKeyMap(KeyMap* keyMap)
+void Keyboard_::sendReport(KeyReport* keys)
 {
-	_keyMap = keyMap;
+	HID_SendReport(2,keys,sizeof(KeyReport));
 }
 
 extern
@@ -406,41 +416,105 @@ const uint8_t _asciimap[128] =
 };
 
 uint8_t USBPutChar(uint8_t c);
-size_t Keyboard_::write(uint8_t c)
+
+// press() adds the specified key (printing, non-printing, or modifier)
+// to the persistent key report and sends the report.  Because of the way 
+// USB HID works, the host acts like the key remains pressed until we 
+// call release(), releaseAll(), or otherwise clear the report and resend.
+size_t Keyboard_::press(uint8_t k) 
 {
-	// Keydown
-	{
-		KeyReport keys = {0};
-		if (_keyMap)
-			_keyMap->charToKey(c,&keys);
-		else
-		{
-			if (c >= 128) {
-				setWriteError();
-				return 0;
-			}
-			c = pgm_read_byte(_asciimap + c);
-			if (!c) {
-				setWriteError();
-				return 0;
-			}
-			if (c & 0x80)
-			{
-				keys.modifiers |= KEY_MODIFIER_LEFT_SHIFT;
-				c &= 0x7F;
+	uint8_t i;
+	if (k >= 136) {			// it's a non-printing key (not a modifier)
+		k = k - 136;
+	} else if (k >= 128) {	// it's a modifier key
+		_keyReport.modifiers |= (1<<(k-128));
+		k = 0;
+	} else {				// it's a printing key
+		k = pgm_read_byte(_asciimap + k);
+		if (!k) {
+			setWriteError();
+			return 0;
+		}
+		if (k & 0x80) {						// it's a capital letter or other character reached with shift
+			_keyReport.modifiers |= 0x02;	// the left shift modifier
+			k &= 0x7F;
+		}
+	}
+	
+	// Add k to the key report only if it's not already present
+	// and if there is an empty slot.
+	if (_keyReport.keys[0] != k && _keyReport.keys[1] != k && 
+		_keyReport.keys[2] != k && _keyReport.keys[3] != k &&
+		_keyReport.keys[4] != k && _keyReport.keys[5] != k) {
+		
+		for (i=0; i<6; i++) {
+			if (_keyReport.keys[i] == 0x00) {
+				_keyReport.keys[i] = k;
+				break;
 			}
-			keys.keys[0] = c;
 		}
-		sendReport(&keys);
+		if (i == 6) {
+			setWriteError();
+			return 0;
+		}	
 	}
-	//	Keyup
-	{
-		KeyReport keys = {0};
-		sendReport(&keys);
+	sendReport(&_keyReport);
+	return 1;
+}
+
+// release() takes the specified key out of the persistent key report and
+// sends the report.  This tells the OS the key is no longer pressed and that
+// it shouldn't be repeated any more.
+size_t Keyboard_::release(uint8_t k) 
+{
+	uint8_t i;
+	if (k >= 136) {			// it's a non-printing key (not a modifier)
+		k = k - 136;
+	} else if (k >= 128) {	// it's a modifier key
+		_keyReport.modifiers &= ~(1<<(k-128));
+		k = 0;
+	} else {				// it's a printing key
+		k = pgm_read_byte(_asciimap + k);
+		if (!k) {
+			return 0;
+		}
+		if (k & 0x80) {							// it's a capital letter or other character reached with shift
+			_keyReport.modifiers &= ~(0x02);	// the left shift modifier
+			k &= 0x7F;
+		}
 	}
+	
+	// Test the key report to see if k is present.  Clear it if it exists.
+	// Check all positions in case the key is present more than once (which it shouldn't be)
+	for (i=0; i<6; i++) {
+		if (0 != k && _keyReport.keys[i] == k) {
+			_keyReport.keys[i] = 0x00;
+		}
+	}
+
+	sendReport(&_keyReport);
 	return 1;
 }
 
+void Keyboard_::releaseAll(void)
+{
+	_keyReport.keys[0] = 0;
+	_keyReport.keys[1] = 0;	
+	_keyReport.keys[2] = 0;
+	_keyReport.keys[3] = 0;	
+	_keyReport.keys[4] = 0;
+	_keyReport.keys[5] = 0;	
+	_keyReport.modifiers = 0;
+	sendReport(&_keyReport);
+}
+
+size_t Keyboard_::write(uint8_t c)
+{	
+	uint8_t p = press(c);		// Keydown
+	uint8_t r = release(c);		// Keyup
+	return (p);					// just return the result of press() since release() almost always returns 1
+}
+
 #endif
 
 #endif /* if defined(USBCON) */
\ No newline at end of file
diff --git a/arduino/cores/arduino/HardwareSerial.cpp b/arduino/cores/arduino/HardwareSerial.cpp
index 9985b78..f40ddee 100644
--- a/arduino/cores/arduino/HardwareSerial.cpp
+++ b/arduino/cores/arduino/HardwareSerial.cpp
@@ -398,6 +398,10 @@ size_t HardwareSerial::write(uint8_t c)
   return 1;
 }
 
+HardwareSerial::operator bool() {
+	return true;
+}
+
 // Preinstantiate Objects //////////////////////////////////////////////////////
 
 #if defined(UBRRH) && defined(UBRRL)
diff --git a/arduino/cores/arduino/HardwareSerial.h b/arduino/cores/arduino/HardwareSerial.h
index 176abe1..bf4924c 100644
--- a/arduino/cores/arduino/HardwareSerial.h
+++ b/arduino/cores/arduino/HardwareSerial.h
@@ -57,6 +57,7 @@ class HardwareSerial : public Stream
     virtual void flush(void);
     virtual size_t write(uint8_t);
     using Print::write; // pull in write(str) and write(buf, size) from Print
+    operator bool();
 };
 
 #if defined(UBRRH) || defined(UBRR0H)
diff --git a/arduino/cores/arduino/Print.cpp b/arduino/cores/arduino/Print.cpp
index e541a6c..98969f5 100755
--- a/arduino/cores/arduino/Print.cpp
+++ b/arduino/cores/arduino/Print.cpp
@@ -226,6 +226,8 @@ size_t Print::printFloat(double number, uint8_t digits)
 { 
   size_t n = 0;
   
+  if (isnan(number)) return print("nan");
+  
   // Handle negative numbers
   if (number < 0.0)
   {
diff --git a/arduino/cores/arduino/Print.h b/arduino/cores/arduino/Print.h
index 1af6b72..dc76150 100755
--- a/arduino/cores/arduino/Print.h
+++ b/arduino/cores/arduino/Print.h
@@ -46,7 +46,10 @@ class Print
     void clearWriteError() { setWriteError(0); }
   
     virtual size_t write(uint8_t) = 0;
-    size_t write(const char *str) { return write((const uint8_t *)str, strlen(str)); }
+    size_t write(const char *str) {
+      if (str == NULL) return 0;
+      return write((const uint8_t *)str, strlen(str));
+    }
     virtual size_t write(const uint8_t *buffer, size_t size);
     
     size_t print(const __FlashStringHelper *);
diff --git a/arduino/cores/arduino/Stream.cpp b/arduino/cores/arduino/Stream.cpp
index 3d5b905..aafb7fc 100644
--- a/arduino/cores/arduino/Stream.cpp
+++ b/arduino/cores/arduino/Stream.cpp
@@ -244,3 +244,27 @@ size_t Stream::readBytesUntil(char terminator, char *buffer, size_t length)
   return index; // return number of characters, not including null terminator
 }
 
+String Stream::readString()
+{
+  String ret;
+  int c = timedRead();
+  while (c >= 0)
+  {
+    ret += (char)c;
+    c = timedRead();
+  }
+  return ret;
+}
+
+String Stream::readStringUntil(char terminator)
+{
+  String ret;
+  int c = timedRead();
+  while (c >= 0 && c != terminator)
+  {
+    ret += (char)c;
+    c = timedRead();
+  }
+  return ret;
+}
+
diff --git a/arduino/cores/arduino/Stream.h b/arduino/cores/arduino/Stream.h
index 13f11be..58bbf75 100644
--- a/arduino/cores/arduino/Stream.h
+++ b/arduino/cores/arduino/Stream.h
@@ -82,6 +82,8 @@ class Stream : public Print
   // returns the number of characters placed in the buffer (0 means no valid data found)
 
   // Arduino String functions to be added here
+  String readString();
+  String readStringUntil(char terminator);
 
   protected:
   long parseInt(char skipChar); // as above but the given skipChar is ignored
diff --git a/arduino/cores/arduino/USBAPI.h b/arduino/cores/arduino/USBAPI.h
index 26a2032..d5abdb6 100644
--- a/arduino/cores/arduino/USBAPI.h
+++ b/arduino/cores/arduino/USBAPI.h
@@ -9,17 +9,17 @@
 //================================================================================
 //	USB
 
-class USB_
+class USBDevice_
 {
 public:
-	USB_();
+	USBDevice_();
 	bool configured();
 
 	void attach();
 	void detach();	// Serial port goes down too...
 	void poll();
 };
-extern USB_ USB;
+extern USBDevice_ USBDevice;
 
 //================================================================================
 //================================================================================
@@ -27,15 +27,19 @@ extern USB_ USB;
 
 class Serial_ : public Stream
 {
+private:
+	ring_buffer *_cdc_rx_buffer;
 public:
 	void begin(uint16_t baud_count);
 	void end(void);
 
 	virtual int available(void);
+	virtual void accept(void);
 	virtual int peek(void);
 	virtual int read(void);
 	virtual void flush(void);
 	virtual size_t write(uint8_t);
+	operator bool();
 };
 extern Serial_ Serial;
 
@@ -54,12 +58,14 @@ private:
 	uint8_t _buttons;
 	void buttons(uint8_t b);
 public:
-	Mouse_();
+	Mouse_(void);
+	void begin(void);
+	void end(void);
 	void click(uint8_t b = MOUSE_LEFT);
 	void move(signed char x, signed char y, signed char wheel = 0);	
 	void press(uint8_t b = MOUSE_LEFT);		// press LEFT by default
 	void release(uint8_t b = MOUSE_LEFT);	// release LEFT by default
-	bool isPressed(uint8_t b = MOUSE_ALL);	// check all buttons by default
+	bool isPressed(uint8_t b = MOUSE_LEFT);	// check LEFT by default
 };
 extern Mouse_ Mouse;
 
@@ -67,14 +73,42 @@ extern Mouse_ Mouse;
 //================================================================================
 //	Keyboard
 
-#define KEY_MODIFIER_LEFT_CTRL		0x01
-#define KEY_MODIFIER_LEFT_SHIFT		0x02
-#define KEY_MODIFIER_LEFT_ALT		0x04
-#define KEY_MODIFIER_LEFT_GUI		0x08
-#define KEY_MODIFIER_RIGHT_CTRL		0x010
-#define KEY_MODIFIER_RIGHT_SHIFT	0x020
-#define KEY_MODIFIER_RIGHT_ALT		0x040
-#define KEY_MODIFIER_RIGHT_GUI		0x080
+#define KEY_LEFT_CTRL		0x80
+#define KEY_LEFT_SHIFT		0x81
+#define KEY_LEFT_ALT		0x82
+#define KEY_LEFT_GUI		0x83
+#define KEY_RIGHT_CTRL		0x84
+#define KEY_RIGHT_SHIFT		0x85
+#define KEY_RIGHT_ALT		0x86
+#define KEY_RIGHT_GUI		0x87
+
+#define KEY_UP_ARROW		0xDA
+#define KEY_DOWN_ARROW		0xD9
+#define KEY_LEFT_ARROW		0xD8
+#define KEY_RIGHT_ARROW		0xD7
+#define KEY_BACKSPACE		0xB2
+#define KEY_TAB				0xB3
+#define KEY_RETURN			0xB0
+#define KEY_ESC				0xB1
+#define KEY_INSERT			0xD1
+#define KEY_DELETE			0xD4
+#define KEY_PAGE_UP			0xD3
+#define KEY_PAGE_DOWN		0xD6
+#define KEY_HOME			0xD2
+#define KEY_END				0xD5
+#define KEY_CAPS_LOCK		0xC1
+#define KEY_F1				0xC2
+#define KEY_F2				0xC3
+#define KEY_F3				0xC4
+#define KEY_F4				0xC5
+#define KEY_F5				0xC6
+#define KEY_F6				0xC7
+#define KEY_F7				0xC8
+#define KEY_F8				0xC9
+#define KEY_F9				0xCA
+#define KEY_F10				0xCB
+#define KEY_F11				0xCC
+#define KEY_F12				0xCD
 
 //	Low level key report: up to 6 keys and shift, ctrl etc at once
 typedef struct
@@ -84,24 +118,19 @@ typedef struct
 	uint8_t keys[6];
 } KeyReport;
 
-//	Map a character into a key report
-//	Called from Print to map text to keycodes
-class KeyMap
-{
-public:
-	virtual void charToKey(int c, KeyReport* keyReport) = 0;
-};
-
-//	
 class Keyboard_ : public Print
 {
 private:
-	KeyMap* _keyMap;
+	KeyReport _keyReport;
 	void sendReport(KeyReport* keys);
-	void setKeyMap(KeyMap* keyMap);	
 public:
-	Keyboard_();
-	virtual size_t write(uint8_t);
+	Keyboard_(void);
+	void begin(void);
+	void end(void);
+	virtual size_t write(uint8_t k);
+	virtual size_t press(uint8_t k);
+	virtual size_t release(uint8_t k);
+	virtual void releaseAll(void);
 };
 extern Keyboard_ Keyboard;
 
diff --git a/arduino/cores/arduino/USBCore.cpp b/arduino/cores/arduino/USBCore.cpp
index 398bc73..6766be6 100644
--- a/arduino/cores/arduino/USBCore.cpp
+++ b/arduino/cores/arduino/USBCore.cpp
@@ -51,16 +51,20 @@ const u16 STRING_LANGUAGE[2] = {
 
 const u16 STRING_IPRODUCT[17] = {
 	(3<<8) | (2+2*16),
-#if USB_PID == USB_PID_LEONARDO	
+#if USB_PID == 0x8036	
 	'A','r','d','u','i','n','o',' ','L','e','o','n','a','r','d','o'
-#elif USB_PID == USB_PID_MICRO
-	'A','r','d','u','i','n','o',' ','M','i','c','r','o',' ',' ',' '
+#else
+	'U','S','B',' ','I','O',' ','B','o','a','r','d',' ',' ',' ',' '
 #endif
 };
 
 const u16 STRING_IMANUFACTURER[12] = {
 	(3<<8) | (2+2*11),
+#if USB_VID == 0x2341
 	'A','r','d','u','i','n','o',' ','L','L','C'
+#else
+	'U','n','k','n','o','w','n',' ',' ',' ',' '
+#endif
 };
 
 #ifdef CDC_ENABLED
@@ -599,6 +603,8 @@ ISR(USB_GEN_vect)
 	{
 #ifdef CDC_ENABLED
 		USB_Flush(CDC_TX);				// Send a tx frame if found
+		while (USB_Available(CDC_RX))	// Handle received bytes (if any)
+			Serial.accept();
 #endif
 		
 		// check whether the one-shot period has elapsed.  if so, turn off the LED
@@ -621,13 +627,13 @@ u8 USBConnected()
 //=======================================================================
 //=======================================================================
 
-USB_ USB;
+USBDevice_ USBDevice;
 
-USB_::USB_()
+USBDevice_::USBDevice_()
 {
 }
 
-void USB_::attach()
+void USBDevice_::attach()
 {
 	_usbConfiguration = 0;
 	UHWCON = 0x01;						// power internal reg
@@ -635,6 +641,12 @@ void USB_::attach()
 	PLLCSR = 0x12;						// Need 16 MHz xtal
 	while (!(PLLCSR & (1<<PLOCK)))		// wait for lock pll
 		;
+
+	// Some tests on specific versions of macosx (10.7.3), reported some
+	// strange behaviuors when the board is reset using the serial
+	// port touch at 1200 bps. This delay fixes this behaviour.
+	delay(1);
+
 	USBCON = ((1<<USBE)|(1<<OTGPADE));	// start USB clock
 	UDIEN = (1<<EORSTE)|(1<<SOFE);		// Enable interrupts for EOR (End of Reset) and SOF (start of frame)
 	UDCON = 0;							// enable attach resistor
@@ -642,19 +654,19 @@ void USB_::attach()
 	TX_RX_LED_INIT;
 }
 
-void USB_::detach()
+void USBDevice_::detach()
 {
 }
 
 //	Check for interrupts
 //	TODO: VBUS detection
-bool USB_::configured()
+bool USBDevice_::configured()
 {
 	return _usbConfiguration;
 }
 
-void USB_::poll()
+void USBDevice_::poll()
 {
 }
 
-#endif /* if defined(USBCON) */
\ No newline at end of file
+#endif /* if defined(USBCON) */
diff --git a/arduino/cores/arduino/USBDesc.h b/arduino/cores/arduino/USBDesc.h
index 549ed9e..900713e 100644
--- a/arduino/cores/arduino/USBDesc.h
+++ b/arduino/cores/arduino/USBDesc.h
@@ -60,8 +60,4 @@
 
 #define IMANUFACTURER	1
 #define IPRODUCT		2
-#define USB_PID_LEONARDO 0x0034
-#define USB_PID_MICRO 0x0035
-#define USB_VID 0x2341	// arduino LLC vid
-#define USB_PID	ARDUINO_MODEL_USB_PID	
 
diff --git a/arduino/cores/arduino/WInterrupts.c b/arduino/cores/arduino/WInterrupts.c
old mode 100755
new mode 100644
index 3b9fe08..62efc9c
--- a/arduino/cores/arduino/WInterrupts.c
+++ b/arduino/cores/arduino/WInterrupts.c
@@ -47,7 +47,27 @@ void attachInterrupt(uint8_t interruptNum, void (*userFunc)(void), int mode) {
     // Enable the interrupt.
       
     switch (interruptNum) {
-#if defined(EICRA) && defined(EICRB) && defined(EIMSK)
+#if defined(__AVR_ATmega32U4__)
+	// I hate doing this, but the register assignment differs between the 1280/2560
+	// and the 32U4.  Since avrlib defines registers PCMSK1 and PCMSK2 that aren't 
+	// even present on the 32U4 this is the only way to distinguish between them.
+	case 0:
+		EICRA = (EICRA & ~((1<<ISC00) | (1<<ISC01))) | (mode << ISC00);
+		EIMSK |= (1<<INT0);
+		break;
+	case 1:
+		EICRA = (EICRA & ~((1<<ISC10) | (1<<ISC11))) | (mode << ISC10);
+		EIMSK |= (1<<INT1);
+		break;	
+    case 2:
+        EICRA = (EICRA & ~((1<<ISC20) | (1<<ISC21))) | (mode << ISC20);
+        EIMSK |= (1<<INT2);
+        break;
+    case 3:
+        EICRA = (EICRA & ~((1<<ISC30) | (1<<ISC31))) | (mode << ISC30);
+        EIMSK |= (1<<INT3);
+        break;
+#elif defined(EICRA) && defined(EICRB) && defined(EIMSK)
     case 2:
       EICRA = (EICRA & ~((1 << ISC00) | (1 << ISC01))) | (mode << ISC00);
       EIMSK |= (1 << INT0);
@@ -80,7 +100,7 @@ void attachInterrupt(uint8_t interruptNum, void (*userFunc)(void), int mode) {
       EICRB = (EICRB & ~((1 << ISC70) | (1 << ISC71))) | (mode << ISC70);
       EIMSK |= (1 << INT7);
       break;
-#else
+#else		
     case 0:
     #if defined(EICRA) && defined(ISC00) && defined(EIMSK)
       EICRA = (EICRA & ~((1 << ISC00) | (1 << ISC01))) | (mode << ISC00);
@@ -134,7 +154,20 @@ void detachInterrupt(uint8_t interruptNum) {
     // to the number of the EIMSK bit to clear, as this isn't true on the 
     // ATmega8.  There, INT0 is 6 and INT1 is 7.)
     switch (interruptNum) {
-#if defined(EICRA) && defined(EICRB) && defined(EIMSK)
+#if defined(__AVR_ATmega32U4__)
+    case 0:
+        EIMSK &= ~(1<<INT0);
+        break;
+    case 1:
+        EIMSK &= ~(1<<INT1);
+        break;
+    case 2:
+        EIMSK &= ~(1<<INT2);
+        break;
+    case 3:
+        EIMSK &= ~(1<<INT3);
+        break;		
+#elif defined(EICRA) && defined(EICRB) && defined(EIMSK)
     case 2:
       EIMSK &= ~(1 << INT0);
       break;
@@ -196,7 +229,28 @@ void attachInterruptTwi(void (*userFunc)(void) ) {
 }
 */
 
-#if defined(EICRA) && defined(EICRB)
+#if defined(__AVR_ATmega32U4__)
+SIGNAL(INT0_vect) {
+	if(intFunc[EXTERNAL_INT_0])
+		intFunc[EXTERNAL_INT_0]();
+}
+
+SIGNAL(INT1_vect) {
+	if(intFunc[EXTERNAL_INT_1])
+		intFunc[EXTERNAL_INT_1]();
+}
+
+SIGNAL(INT2_vect) {
+    if(intFunc[EXTERNAL_INT_2])
+		intFunc[EXTERNAL_INT_2]();
+}
+
+SIGNAL(INT3_vect) {
+    if(intFunc[EXTERNAL_INT_3])
+		intFunc[EXTERNAL_INT_3]();
+}
+
+#elif defined(EICRA) && defined(EICRB)
 
 SIGNAL(INT0_vect) {
   if(intFunc[EXTERNAL_INT_2])
diff --git a/arduino/cores/arduino/main.cpp b/arduino/cores/arduino/main.cpp
old mode 100755
new mode 100644
index 34450f4..3d4e079
--- a/arduino/cores/arduino/main.cpp
+++ b/arduino/cores/arduino/main.cpp
@@ -5,7 +5,7 @@ int main(void)
 	init();
 
 #if defined(USBCON)
-	USB.attach();
+	USBDevice.attach();
 #endif
 	
 	setup();
diff --git a/arduino/cores/arduino/wiring.c b/arduino/cores/arduino/wiring.c
old mode 100755
new mode 100644
index e7f7cde..ac8bb6f
--- a/arduino/cores/arduino/wiring.c
+++ b/arduino/cores/arduino/wiring.c
@@ -278,12 +278,21 @@ void init()
 	sbi(TCCR3B, CS30);
 	sbi(TCCR3A, WGM30);		// put timer 3 in 8-bit phase correct pwm mode
 #endif
-	
+
+#if defined(TCCR4A) && defined(TCCR4B) && defined(TCCR4D) /* beginning of timer4 block for 32U4 and similar */
+	sbi(TCCR4B, CS42);		// set timer4 prescale factor to 64
+	sbi(TCCR4B, CS41);
+	sbi(TCCR4B, CS40);
+	sbi(TCCR4D, WGM40);		// put timer 4 in phase- and frequency-correct PWM mode	
+	sbi(TCCR4A, PWM4A);		// enable PWM mode for comparator OCR4A
+	sbi(TCCR4C, PWM4D);		// enable PWM mode for comparator OCR4D
+#else /* beginning of timer4 block for ATMEGA1280 and ATMEGA2560 */
 #if defined(TCCR4B) && defined(CS41) && defined(WGM40)
 	sbi(TCCR4B, CS41);		// set timer 4 prescale factor to 64
 	sbi(TCCR4B, CS40);
 	sbi(TCCR4A, WGM40);		// put timer 4 in 8-bit phase correct pwm mode
 #endif
+#endif /* end timer4 block for ATMEGA1280/2560 and similar */	
 
 #if defined(TCCR5B) && defined(CS51) && defined(WGM50)
 	sbi(TCCR5B, CS51);		// set timer 5 prescale factor to 64
diff --git a/arduino/cores/arduino/wiring_analog.c b/arduino/cores/arduino/wiring_analog.c
index a8bc817..0e9881f 100644
--- a/arduino/cores/arduino/wiring_analog.c
+++ b/arduino/cores/arduino/wiring_analog.c
@@ -206,14 +206,17 @@ void analogWrite(uint8_t pin, int val)
 				break;
 			#endif
 
-			#if defined(TCCR4A) && defined(COM4A1)
+			#if defined(TCCR4A)
 			case TIMER4A:
-				// connect pwm to pin on timer 4, channel A
+				//connect pwm to pin on timer 4, channel A
 				sbi(TCCR4A, COM4A1);
-				OCR4A = val; // set pwm duty
+				#if defined(COM4A0)		// only used on 32U4
+				cbi(TCCR4A, COM4A0);
+				#endif
+				OCR4A = val;	// set pwm duty
 				break;
 			#endif
-
+			
 			#if defined(TCCR4A) && defined(COM4B1)
 			case TIMER4B:
 				// connect pwm to pin on timer 4, channel B
@@ -230,14 +233,18 @@ void analogWrite(uint8_t pin, int val)
 				break;
 			#endif
 				
-			#if defined(TCCR4A) && defined(COM4D1)
-			case TIMER4D:
+			#if defined(TCCR4C) && defined(COM4D1)
+			case TIMER4D:				
 				// connect pwm to pin on timer 4, channel D
-				sbi(TCCR4A, COM4D1);
-				OCR4D = val; // set pwm duty
+				sbi(TCCR4C, COM4D1);
+				#if defined(COM4D0)		// only used on 32U4
+				cbi(TCCR4C, COM4D0);
+				#endif
+				OCR4D = val;	// set pwm duty
 				break;
 			#endif
 
+							
 			#if defined(TCCR5A) && defined(COM5A1)
 			case TIMER5A:
 				// connect pwm to pin on timer 5, channel A
@@ -272,3 +279,4 @@ void analogWrite(uint8_t pin, int val)
 		}
 	}
 }
+
diff --git a/arduino/cores/arduino/wiring_digital.c b/arduino/cores/arduino/wiring_digital.c
old mode 100755
new mode 100644
index 584a28a..be323b1
--- a/arduino/cores/arduino/wiring_digital.c
+++ b/arduino/cores/arduino/wiring_digital.c
@@ -115,13 +115,17 @@ static void turnOffPWM(uint8_t timer)
 
 		#if defined(TCCR4A) && defined(COM4A1)
 		case  TIMER4A:  cbi(TCCR4A, COM4A1);    break;
-		#endif
+		#endif					
 		#if defined(TCCR4A) && defined(COM4B1)
 		case  TIMER4B:  cbi(TCCR4A, COM4B1);    break;
 		#endif
 		#if defined(TCCR4A) && defined(COM4C1)
 		case  TIMER4C:  cbi(TCCR4A, COM4C1);    break;
-		#endif
+		#endif			
+		#if defined(TCCR4C) && defined(COM4D1)
+		case TIMER4D:	cbi(TCCR4C, COM4D1);	break;
+		#endif			
+			
 		#if defined(TCCR5A)
 		case  TIMER5A:  cbi(TCCR5A, COM5A1);    break;
 		case  TIMER5B:  cbi(TCCR5A, COM5B1);    break;
diff --git a/arduino/cores/arduino/wiring_private.h b/arduino/cores/arduino/wiring_private.h
index f0ceb0c..026ce1a 100755
--- a/arduino/cores/arduino/wiring_private.h
+++ b/arduino/cores/arduino/wiring_private.h
@@ -56,6 +56,8 @@ extern "C"{
 #define EXTERNAL_NUM_INTERRUPTS 8
 #elif defined(__AVR_ATmega1284P__) 
 #define EXTERNAL_NUM_INTERRUPTS 3
+#elif defined(__AVR_ATmega32U4__)
+#define EXTERNAL_NUM_INTERRUPTS 4
 #else
 #define EXTERNAL_NUM_INTERRUPTS 2
 #endif
diff --git a/arduino/variants/leonardo/pins_arduino.h b/arduino/variants/leonardo/pins_arduino.h
index 5a15146..9f770d6 100644
--- a/arduino/variants/leonardo/pins_arduino.h
+++ b/arduino/variants/leonardo/pins_arduino.h
@@ -27,8 +27,6 @@
 
 #include <avr/pgmspace.h>
 
-#define ARDUINO_MODEL_USB_PID	0x0034
-
 #define TX_RX_LED_INIT	DDRD |= (1<<5), DDRB |= (1<<0)
 #define TXLED0			PORTD |= (1<<5)
 #define TXLED1			PORTD &= ~(1<<5)
@@ -59,6 +57,11 @@ static const uint8_t A9 = 27;	// D9
 static const uint8_t A10 = 28;	// D10
 static const uint8_t A11 = 29;	// D12
 
+#define digitalPinToPCICR(p)    ((((p) >= 8 && (p) <= 11) || ((p) >= 14 && (p) <= 17) || ((p) >= A8 && (p) <= A10)) ? (&PCICR) : ((uint8_t *)0))
+#define digitalPinToPCICRbit(p) 0
+#define digitalPinToPCMSK(p)    ((((p) >= 8 && (p) <= 11) || ((p) >= 14 && (p) <= 17) || ((p) >= A8 && (p) <= A10)) ? (&PCMSK0) : ((uint8_t *)0))
+#define digitalPinToPCMSKbit(p) ( ((p) >= 8 && (p) <= 11) ? (p) - 4 : ((p) == 14 ? 3 : ((p) == 15 ? 1 : ((p) == 16 ? 2 : ((p) == 17 ? 0 : (p - A8 + 4))))))
+
 //	__AVR_ATmega32U4__ has an unusual mapping of pins to channels
 extern const uint8_t PROGMEM analog_pin_to_channel_PGM[];
 #define analogPinToChannel(P)  ( pgm_read_byte( analog_pin_to_channel_PGM + (P) ) )
@@ -212,7 +215,7 @@ const uint8_t PROGMEM digital_pin_to_bit_mask_PGM[30] = {
 	_BV(6), // D29 / D12 - A11 - PD6
 };
 
-const uint8_t PROGMEM digital_pin_to_timer_PGM[18] = {
+const uint8_t PROGMEM digital_pin_to_timer_PGM[16] = {
 	NOT_ON_TIMER,	
 	NOT_ON_TIMER,
 	NOT_ON_TIMER,



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