diff --git a/boards.txt b/boards.txt
index af2ad8e..c6124e0 100644
--- a/boards.txt
+++ b/boards.txt
@@ -7,14 +7,22 @@ uno.upload.tool=avrdude
 uno.upload.protocol=arduino
 uno.upload.maximum_size=32256
 uno.upload.speed=115200
+
 uno.bootloader.tool=avrdude
-uno.bootloader.erase.params=-e -Ulock:w:0x3F:m -Uefuse:w:0x05:m -Uhfuse:w:0xde:m -Ulfuse:w:0xff:m
-uno.bootloader.write.params=-Uflash:w:{bootloader.file}:i -Ulock:w:0x0F:m
+uno.bootloader.low_fuses=0xFF
+uno.bootloader.high_fuses=0xDE
+uno.bootloader.extended_fuses=0x05
+uno.bootloader.unlock_bits=0x3F
+uno.bootloader.lock_bits=0x0F
+uno.bootloader.erase.params=-e -Ulock:w:{bootloader.unlock_bits}:m -Uefuse:w:{bootloader.extended_fuses}:m -Uhfuse:w:{bootloader.high_fuses}:m -Ulfuse:w:{bootloader.low_fuses}:m
+uno.bootloader.write.params=-Uflash:w:{bootloader.file}:i -Ulock:w:{bootloader.lock_bits}:m
 uno.bootloader.file={runtime.ide.path}/hardware/arduino/avr/optiboot/optiboot_atmega328.hex
+
 uno.build.mcu=atmega328p
 uno.build.f_cpu=16000000L
 uno.build.core=arduino
 uno.build.variant=standard
+uno.build.extra_flags=
 
 ##############################################################
 
@@ -162,6 +170,7 @@ leonardo.build.vid=0x2341
 leonardo.build.pid=0x8036
 leonardo.build.core=arduino
 leonardo.build.variant=leonardo
+leonardo.build.extra_flags=-DUSB_VID={build.vid} -DDUSB_PID={build.pid}
 
 ##############################################################
 
diff --git a/bootloaders/caterina/Caterina-Leonardo.hex b/bootloaders/caterina/Caterina-Leonardo.hex
new file mode 100644
index 0000000..de7b53c
--- /dev/null
+++ b/bootloaders/caterina/Caterina-Leonardo.hex
@@ -0,0 +1,1024 @@
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+:127FC0000069006E006F0020004C004C0043000000006E
+:00000001FF
diff --git a/bootloaders/caterina/Caterina.c b/bootloaders/caterina/Caterina.c
new file mode 100755
index 0000000..abcba2b
--- /dev/null
+++ b/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/bootloaders/caterina/Caterina.h b/bootloaders/caterina/Caterina.h
new file mode 100755
index 0000000..f8251d4
--- /dev/null
+++ b/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/bootloaders/caterina/Descriptors.c b/bootloaders/caterina/Descriptors.c
new file mode 100755
index 0000000..c5feaf5
--- /dev/null
+++ b/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/bootloaders/caterina/Descriptors.h b/bootloaders/caterina/Descriptors.h
new file mode 100755
index 0000000..94091ae
--- /dev/null
+++ b/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/bootloaders/caterina/Makefile b/bootloaders/caterina/Makefile
new file mode 100755
index 0000000..873f8bd
--- /dev/null
+++ b/bootloaders/caterina/Makefile
@@ -0,0 +1,728 @@
+# Hey Emacs, this is a -*- makefile -*-
+#----------------------------------------------------------------------------
+# WinAVR Makefile Template written by Eric B. Weddington, Jörg Wunsch, 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/bootloaders/diskloader/DiskLoader-Leonardo.hex b/bootloaders/diskloader/DiskLoader-Leonardo.hex
deleted file mode 100644
index 0d0c167..0000000
--- a/bootloaders/diskloader/DiskLoader-Leonardo.hex
+++ /dev/null
@@ -1,115 +0,0 @@
-:1078000011241FBECFEFDAE0DEBFCDBFFFC04101C4
-:1078100042144505560455026403740300001E9586
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-:00000001FF
diff --git a/bootloaders/diskloader/Makefile b/bootloaders/diskloader/Makefile
deleted file mode 100644
index 6ac3db3..0000000
--- a/bootloaders/diskloader/Makefile
+++ /dev/null
@@ -1,105 +0,0 @@
-###############################################################################
-# Makefile for DiskLoader
-###############################################################################
-
-## General Flags
-PROJECT = DiskLoader
-TARGET = DiskLoader.elf
-CC = avr-gcc
-
-# BOARD2
-MCU = atmega32u4
-AVR_FREQ   = 16000000L
-
-# Specify the Arduino model using the assigned PID.  This is used by Descriptors.c
-#   to set PID and product descriptor string
-# Arduino Leonardo PID
-ARDUINO_MODEL_PID = 0x0034
-# Arduino Micro PID
-#ARDUINO_MODEL_PID = 0x0035
-
-# Change if your programmer is different
-AVRDUDE_PROGRAMMER = avrispmkII
-AVRDUDE_PORT = usb	   
-
-# program name should not be changed...
-PROGRAM    = DiskLoader
-
-AVRDUDE = avrdude
-AVRDUDE_FLAGS = -p $(MCU) -P $(AVRDUDE_PORT) -c $(AVRDUDE_PROGRAMMER) -p $(MCU)
-
-## Options common to compile, link and assembly rules
-COMMON = -mmcu=$(MCU)
-
-override CFLAGS = -g -Wall -Os -mmcu=$(MCU) -DF_CPU=$(AVR_FREQ) -DARDUINO_MODEL_PID=$(ARDUINO_MODEL_PID) $(DEFS) -ffunction-sections -gdwarf-2 -fdata-sections -fno-split-wide-types
-
-## Assembly specific flags
-ASMFLAGS = $(COMMON)
-ASMFLAGS += $(CFLAGS)
-ASMFLAGS += -x assembler-with-cpp -Wa,-gdwarf2
-
-## Linker flags
-LDFLAGS = $(COMMON)
-LDFLAGS += -Wl,-gc-sections,-Map=DiskLoader.map,--section-start=.text=0x7800,--relax
-LDFLAGS += -nodefaultlibs -nostartfiles
-
-
-## Intel Hex file production flags
-HEX_EEPROM_FLAGS = -j .eeprom
-HEX_EEPROM_FLAGS += --set-section-flags=.eeprom="alloc,load"
-HEX_EEPROM_FLAGS += --change-section-lma .eeprom=0 --no-change-warnings
-
-## Objects explicitly added by the user
-LINKONLYOBJECTS = 
-
-MODULES   := .
-SRC_DIR   := $(addprefix src/,$(MODULES))
-BUILD_DIR := $(addprefix build/,$(MODULES))
-
-SRC       := $(foreach sdir,$(SRC_DIR),$(wildcard $(sdir)/*.cpp))
-OBJ       := $(patsubst src/%.cpp,build/%.o,$(SRC))
-DEP		  := $(OBJ:%.o=%.d)
-INCLUDES  := $(addprefix -I,$(SRC_DIR))
-
-vpath %.cpp $(SRC_DIR)
-
-.PHONY: all checkdirs clean
-
-all: checkdirs $(TARGET) DiskLoader.hex DiskLoader.lss size
-
--include $(DEP)
-
-checkdirs: $(BUILD_DIR)
-
-$(BUILD_DIR):
-	@mkdir -p $@
-
-clean:
-	@rm -rf build/
-	@rm -f *.hex
-	@rm -f *.elf
-	@rm -f *.lss
-	@rm -f *.map
-
-define make-goal
-$1/%.o: %.cpp
-	$(CC) $(INCLUDES) $(CFLAGS) -c $$< -MD -o $$@
-endef
-
-$(foreach bdir,$(BUILD_DIR),$(eval $(call make-goal,$(bdir))))
-
-$(TARGET): $(OBJ)
-	$(CC) $(LDFLAGS) $(LINKONLYOBJECTS) $(LIBDIRS) $(LIBS) $^ -o $@
-
-%.hex: $(TARGET)
-	avr-objcopy -O ihex $(HEX_FLASH_FLAGS)  $< $@
-	
-%.lss: $(TARGET)
-	avr-objdump -h -S $< > $@
-
-size: $(TARGET)
-	@echo
-#	@avr-size -C --mcu=${MCU} ${TARGET}.elf
-
-program: $(TARGET).hex
-	$(AVRDUDE) $(AVRDUDE_FLAGS) -B 5 -u -U flash:w:$(TARGET).hex
\ No newline at end of file
diff --git a/bootloaders/diskloader/src/DiskLoader.cpp b/bootloaders/diskloader/src/DiskLoader.cpp
deleted file mode 100644
index 6580618..0000000
--- a/bootloaders/diskloader/src/DiskLoader.cpp
+++ /dev/null
@@ -1,239 +0,0 @@
-
-
-#include "Platform.h"
-
-//	This bootloader creates a composite Serial device
-//
-//	The serial interface supports a STK500v1 protocol that is very similar to optiboot
-//
-//	The bootloader will timeout and start the firmware after a few hundred milliseconds
-//	if a usb connection is not detected.
-//	
-//	The tweakier code is to keep the bootloader below 2k (no interrupt table, for example)
-
-extern "C"
-void entrypoint(void) __attribute__ ((naked)) __attribute__ ((section (".vectors")));
-void entrypoint(void)
-{
-	asm volatile (
-		"eor	r1,		r1\n"	// Zero register
-		"out	0x3F,	r1\n"	// SREG
-		"ldi	r28,	0xFF\n"
-		"ldi	r29,	0x0A\n"
-		"out	0x3E,	r29\n"	// SPH
-		"out	0x3D,	r28\n"	// SPL
-		"rjmp	main"			// Stack is all set up, start the main code
-		::);
-}
-
-u8 _flashbuf[128];
-u8 _inSync;
-u8 _ok;
-extern volatile u8 _ejected;
-extern volatile u16 _timeout;
-
-void Program(u8 ep, u16 page, u8 count)
-{
-	u8 write = page < 30*1024;		// Don't write over firmware please
-	if (write)
-		boot_page_erase(page);
-
-	Recv(ep,_flashbuf,count);		// Read while page is erasing
-
-	if (!write)
-		return;
-
-	boot_spm_busy_wait();			// Wait until the memory is erased.
-
-	count >>= 1;
-	u16* p = (u16*)page;
-	u16* b = (u16*)_flashbuf;
-	for (u8 i = 0; i < count; i++)
-		boot_page_fill(p++, b[i]);
-
-    boot_page_write(page);
-    boot_spm_busy_wait();
-    boot_rww_enable ();
-}
-
-
-int USBGetChar();
-#define getch USBGetChar
-
-#define HW_VER	 0x02
-#define SW_MAJOR 0x01
-#define SW_MINOR 0x10
-
-#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'
-
-extern const u8 _readSize[] PROGMEM;
-const u8 _readSize[] = 
-{
-	STK_GET_PARAMETER,	1,
-	STK_SET_DEVICE,		20,
-	STK_SET_DEVICE_EXT,	5,
-	STK_UNIVERSAL,		4,
-	STK_LOAD_ADDRESS,	2,
-	STK_PROG_PAGE,		3,
-	STK_READ_PAGE,		3,
-	0,0
-};
-
-extern const u8 _consts[] PROGMEM;
-const u8 _consts[] = 
-{
-	SIGNATURE_0,
-	SIGNATURE_1,
-	SIGNATURE_2,
-	HW_VER,		// Hardware version
-	SW_MAJOR,	// Software major version
-	SW_MINOR,	// Software minor version
-	0x03,		// Unknown but seems to be required by avr studio 3.56
-	0x00,		// 
-};
-
-
-void USBInit(void);
-int main(void) __attribute__ ((naked));
-
-//	STK500v1 main loop, very similar to optiboot in protocol and implementation
-int main()
-{
-	wdt_disable();
-	TXLED0;
-	RXLED0;
-	LED0;
-	BOARD_INIT();
-	USBInit();
-
-	_inSync = STK_INSYNC;
-	_ok = STK_OK;
-
-	if (pgm_read_word(0) != -1)
-		_ejected = 1;
-
-	for(;;)
-	{
-		u8* packet = _flashbuf;
-		u16 address = 0;
-		for (;;)
-		{
-			u8 cmd = getch();
-
-			//	Read packet contents
-			u8 len;
-			const u8* rs = _readSize;
-			for(;;)
-			{
-				u8 c = pgm_read_byte(rs++);
-				len = pgm_read_byte(rs++);
-				if (c == cmd || c == 0)
-					break;
-			}
-			_timeout = 0;
-			//	Read params
-			Recv(CDC_RX,packet,len);
-
-			//	Send a response
-			u8 send = 0;
-			const u8* pgm = _consts+7;			// 0
-			if (STK_GET_PARAMETER == cmd)
-			{
-				u8 i = packet[0] - 0x80;
-				if (i > 2)
-					i = (i == 0x18) ? 3 : 4;	// 0x80:HW_VER,0x81:SW_MAJOR,0x82:SW_MINOR,0x18:3 or 0
-				pgm = _consts + i + 3;
-				send = 1;
-			}
-
-			else if (STK_UNIVERSAL == cmd)
-			{
-				if (packet[0] == 0x30)
-					pgm = _consts + packet[2];	// read signature
-				send = 1;
-			}
-			
-			//	Read signature bytes
-			else if (STK_READ_SIGN == cmd)
-			{
-				pgm = _consts;
-				send = 3;
-			}
-
-			else if (STK_LOAD_ADDRESS == cmd)
-			{
-				address = *((u16*)packet);		// word addresses
-				address += address;
-			}
-
-			else if (STK_PROG_PAGE == cmd)
-			{
-				Program(CDC_RX,address,packet[1]);
-			}
-
-			else if (STK_READ_PAGE == cmd)
-			{
-				send = packet[1];
-				pgm = (const u8*)address;
-				address += send; // not sure of this is required
-			}
-
-			// Check sync
-			if (getch() != ' ')
-				break;
-			Transfer(CDC_TX,&_inSync,1);
-
-			// Send result
-			if (send)
-				Transfer(CDC_TX|TRANSFER_PGM,pgm,send);	// All from pgm memory
-
-			//	Send ok
-			Transfer(CDC_TX|TRANSFER_RELEASE,&_ok,1);
-
-			if (cmd == 'Q')
-				break;
-		}
-		_timeout = 500;		// wait a moment before exiting the bootloader - may need to finish responding to 'Q' for example
-		_ejected = 1;
-	}
-}
-
-//	Nice breathing LED indicates we are in the firmware
-u16 _pulse;
-void LEDPulse()
-{
-	_pulse += 4;
-	u8 p = _pulse >> 9;
-	if (p > 63)
-		p = 127-p;
-	p += p;
-	if (((u8)_pulse) > p)
-		LED0;
-	else
-		LED1;
-}
-
-void Reboot()
-{
-	TXLED0;		// switch off the RX and TX LEDs before starting the user sketch
-	RXLED0;
-	UDCON = 1;		// Detatch USB
-	UDIEN = 0;
-	asm volatile (	// Reset vector to run firmware
-		"clr r30\n"
-		"clr r31\n"
-		"ijmp\n"
-	::);
-}
diff --git a/bootloaders/diskloader/src/Platform.h b/bootloaders/diskloader/src/Platform.h
deleted file mode 100644
index 04c5b79..0000000
--- a/bootloaders/diskloader/src/Platform.h
+++ /dev/null
@@ -1,51 +0,0 @@
-
-#include <inttypes.h>
-#include <avr/io.h>
-#include <avr/pgmspace.h>
-#include <avr/boot.h>
-#include <util/delay.h>
-#include <avr/interrupt.h>
-#include <avr/wdt.h>
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-typedef unsigned char u8;
-typedef unsigned short u16;
-typedef unsigned long u32;
-
-
-#define CPU_PRESCALE(n)	(CLKPR = 0x80, CLKPR = (n))
-#define DISABLE_JTAG()  MCUCR = (1 << JTD) | (1 << IVCE) | (0 << PUD); MCUCR = (1 << JTD) | (0 << IVSEL) | (0 << IVCE) | (0 << PUD);
-
-#define USB_PID_LEONARDO 0x0034
-#define USB_PID_MICRO 0x0035
-#define USB_VID 0x2341	// arduino LLC vid
-#define USB_PID ARDUINO_MODEL_PID	// passed in by Makefile - 0x0034 for Leonardo, 0x0035 for MIcro
-
-#define USB_SERIAL_STRING	'0','0','0','0','0','0','0','0','1','7','0','1'
-
-#define OEM_NAME		'l','e','o','n','a','r','d','o'					// 8 chars
-#define BOARD_INIT()	DDRC |= (1<<7); DDRB |= (1<<0); DDRD |= (1<<5); CPU_PRESCALE(0); DISABLE_JTAG();
-#define LED0			PORTC &= ~(1<<7)
-#define LED1			PORTC |= (1<<7)
-#define TXLED0			PORTD |= (1<<5)
-#define TXLED1			PORTD &= ~(1<<5)
-#define RXLED0			PORTB |= (1<<0)
-#define RXLED1			PORTB &= ~(1<<0)
-
-#define TRANSFER_PGM		0x80
-#define TRANSFER_RELEASE	0x40
-#define TRANSFER_ZERO		0x20
-
-void Transfer(u8 ep, const u8* data, int len);
-void Recv(u8 ep, u8* dst, u8 len);
-void Program(u8 ep, u16 page, u8 count);
-
-#define CDC_ENABLED
-
-#include "USBCore.h"
-#include "USBDesc.h"
-
-
diff --git a/bootloaders/diskloader/src/USBCore.cpp b/bootloaders/diskloader/src/USBCore.cpp
deleted file mode 100644
index 208121e..0000000
--- a/bootloaders/diskloader/src/USBCore.cpp
+++ /dev/null
@@ -1,510 +0,0 @@
-
-
-/* Copyright (c) 2010, Peter Barrett  
-**  
-** Permission to use, copy, modify, and/or distribute this software for  
-** any purpose with or without fee is hereby granted, provided that the  
-** above copyright notice and this permission notice appear in all copies.  
-** 
-** THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS 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, DIRECT, 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.  
-*/
-
-#include "Platform.h"
-
-#define CDC_TX CDC_ENDPOINT_IN
-#define CDC_RX CDC_ENDPOINT_OUT
-
-#define EP_TYPE_CONTROL				0x00
-#define EP_TYPE_BULK_IN				0x81
-#define EP_TYPE_BULK_OUT			0x80
-#define EP_TYPE_INTERRUPT_IN		0xC1
-#define EP_TYPE_INTERRUPT_OUT		0xC0
-#define EP_TYPE_ISOCHRONOUS_IN		0x41
-#define EP_TYPE_ISOCHRONOUS_OUT		0x40
-
-/** Pulse generation counters to keep track of the number of milliseconds remaining for each pulse type */
-#define TX_RX_LED_PULSE_MS 100
-u8 TxLEDPulse; /**< Milliseconds remaining for data Tx LED pulse */
-u8 RxLEDPulse; /**< Milliseconds remaining for data Rx LED pulse */
-
-void Reboot();
-
-//==================================================================
-//==================================================================
-
-typedef struct
-{
-	u32	dwDTERate;
-	u8	bCharFormat;
-	u8 	bParityType;
-	u8 	bDataBits;
-	u8	lineState;
-} LineInfo;
-
-static volatile LineInfo _usbLineInfo = { 57600, 0x00, 0x00, 0x00, 0x00 };
-
-//==================================================================
-//==================================================================
-
-//	4 bytes of RAM
-volatile u8 _usbConfiguration;
-volatile u8 _ejected;
-volatile u16 _timeout;
-
-static inline void WaitIN(void)
-{
-	while (!(UEINTX & (1<<TXINI)));
-}
-
-static inline void ClearIN(void)
-{
-	UEINTX = ~(1<<TXINI);
-}
-
-static inline void WaitOUT(void)
-{
-	while (!(UEINTX & (1<<RXOUTI)))
-		;
-}
-
-static inline u8 WaitForINOrOUT()
-{
-	while (!(UEINTX & ((1<<TXINI)|(1<<RXOUTI))))
-		;
-	return (UEINTX & (1<<RXOUTI)) == 0;
-}
-
-static inline void ClearOUT(void)
-{
-	UEINTX = ~(1<<RXOUTI);
-}
-
-static
-void Send(volatile const u8* data, u8 count)
-{
-	TXLED1;					// light the TX LED
-	TxLEDPulse = TX_RX_LED_PULSE_MS;
-	while (count--)
-		UEDATX = *data++;
-}
-
-void Recv(volatile u8* data, u8 count)
-{
-	RXLED1;					// light the RX LED
-	RxLEDPulse = TX_RX_LED_PULSE_MS;
-	while (count--)
-		*data++ = UEDATX;
-}
-
-static inline u8 Recv8()
-{
-	RXLED1;					// light the RX LED
-	RxLEDPulse = TX_RX_LED_PULSE_MS;
-	return UEDATX;
-}
-
-static inline void Send8(u8 d)
-{
-	TXLED1;					// light the TX LED
-	TxLEDPulse = TX_RX_LED_PULSE_MS;
-	UEDATX = d;
-}
-
-static inline void SetEP(u8 ep)
-{
-	UENUM = ep;
-}
-
-static inline u8 FifoByteCount()
-{
-	return UEBCLX;
-}
-
-static inline u8 ReceivedSetupInt()
-{
-	return UEINTX & (1<<RXSTPI);
-}
-
-static inline void ClearSetupInt()
-{
-	UEINTX = ~((1<<RXSTPI) | (1<<RXOUTI) | (1<<TXINI));
-}
-
-static inline void Stall()
-{
-	UECONX = (1<<STALLRQ) | (1<<EPEN);
-}
-
-static inline u8 ReadWriteAllowed()
-{
-	return UEINTX & (1<<RWAL);
-}
-
-static inline u8 Stalled()
-{
-	return UEINTX & (1<<STALLEDI);
-}
-
-static inline u8 FifoFree()
-{
-	return UEINTX & (1<<FIFOCON);
-}
-
-static inline void ReleaseRX()
-{
-	UEINTX = 0x6B;	// FIFOCON=0 NAKINI=1 RWAL=1 NAKOUTI=0 RXSTPI=1 RXOUTI=0 STALLEDI=1 TXINI=1
-}
-
-static inline void ReleaseTX()
-{
-	UEINTX = 0x3A;	// FIFOCON=0 NAKINI=0 RWAL=1 NAKOUTI=1 RXSTPI=1 RXOUTI=0 STALLEDI=1 TXINI=0
-}
-
-static inline u8 FrameNumber()
-{
-	return UDFNUML;
-}
-
-//==================================================================
-//==================================================================
-
-#define EP_SINGLE_64 0x32	// EP0
-#define EP_DOUBLE_64 0x36	// Other endpoints
-
-static void InitEP(u8 index, u8 type, u8 size)
-{
-	UENUM = index;
-	UECONX = 1;
-	UECFG0X = type;
-	UECFG1X = size;
-}
-
-//	API
-void USBInit(void)
-{
-	_timeout = 0;
-	_usbConfiguration = 0;
-	_ejected = 0;
-	
-	UHWCON = 0x01;						// power internal reg (don't need this?)
-	USBCON = (1<<USBE)|(1<<FRZCLK);		// clock frozen, usb enabled
-	PLLCSR = 0x12;						// Need 16 MHz xtal
-	while (!(PLLCSR & (1<<PLOCK)))		// wait for lock pll
-		;
-	USBCON = ((1<<USBE)|(1<<OTGPADE));	// start USB clock
-	UDCON = 0;							// enable attach resistor
-}
-
-u8 USBGetConfiguration(void)
-{
-	return _usbConfiguration;
-}
-
-u8 HasData(u8 ep)
-{
-	SetEP(ep);
-	return ReadWriteAllowed();	// count in fifo
-}
-
-int USBGetChar();
-void Recv(u8 ep, u8* dst, u8 len)
-{
-	SetEP(ep);
-	while (len--)
-	{
-		while (!ReadWriteAllowed())
-			;
-		*dst++ = Recv8();
-		if (!ReadWriteAllowed())	// release empty buffer
-			ReleaseRX();
-	}
-}
-
-//	Transmit a packet to endpoint
-void Transfer(u8 ep, const u8* data, int len)
-{
-	u8 zero = ep & TRANSFER_ZERO;
-	SetEP(ep & 7);
-	while (len--)
-	{
-		while (!ReadWriteAllowed())
-			;	// TODO Check for STALL etc
-
-		u8 d = (ep & TRANSFER_PGM) ? pgm_read_byte(data) : data[0];
-		data++;
-		if (zero)
-			d = 0;
-		Send8(d);
-
-		if (!ReadWriteAllowed())
-			ReleaseTX();
-	}
-	if (ep & TRANSFER_RELEASE)
-		ReleaseTX();
-}
-
-extern const u8 _initEndpoints[] PROGMEM;
-const u8 _initEndpoints[] = 
-{
-	0,
-
-#ifdef CDC_ENABLED
-	EP_TYPE_INTERRUPT_IN,		// CDC_ENDPOINT_ACM
-	EP_TYPE_BULK_OUT,			// CDC_ENDPOINT_OUT
-	EP_TYPE_BULK_IN,			// CDC_ENDPOINT_IN
-#endif
-
-	EP_TYPE_INTERRUPT_IN,		// HID_ENDPOINT_INT
-};
-
-static void InitEndpoints()
-{
-	for (u8 i = 1; i < sizeof(_initEndpoints); i++)
-	{
-		UENUM = i;
-		UECONX = 1;
-		UECFG0X = pgm_read_byte(_initEndpoints+i);
-		UECFG1X = EP_DOUBLE_64;
-	}
-	UERST = 0x7E;	// And reset them
-	UERST = 0;
-}
-
-typedef struct
-{
-	u8 bmRequestType;
-	u8 bRequest;
-	u8 wValueL;
-	u8 wValueH;
-	u16 wIndex;
-	u16 wLength;
-} Setup;
-Setup _setup;
-
-//bool USBHook(Setup& setup)
-bool USBHook()
-{
-	Setup& setup = _setup;
-	u8 r = setup.bRequest;
-
-	//	CDC Requests
-	if (CDC_GET_LINE_CODING == r)
-	{
-		Send((const volatile u8*)&_usbLineInfo,7);
-	}
-
-	else if (CDC_SET_LINE_CODING ==  r)
-	{
-		WaitOUT();
-		Recv((volatile u8*)&_usbLineInfo,7);
-		ClearOUT();
-	}
-
-	else if (CDC_SET_CONTROL_LINE_STATE == r)
-	{
-		_usbLineInfo.lineState = setup.wValueL;
-	}
-
-	return true;
-}
-
-extern const u8 _rawHID[] PROGMEM;
-#define LSB(_x) ((_x) & 0xFF)
-#define MSB(_x) ((_x) >> 8)
-
-#define RAWHID_USAGE_PAGE	0xFFC0
-#define RAWHID_USAGE		0x0C00
-#define RAWHID_TX_SIZE 64
-#define RAWHID_RX_SIZE 64
-
-const u8 _rawHID[] =
-{
-	//	RAW HID
-	0x06, LSB(RAWHID_USAGE_PAGE), MSB(RAWHID_USAGE_PAGE),	// 30
-	0x0A, LSB(RAWHID_USAGE), MSB(RAWHID_USAGE),
-
-	0xA1, 0x01,				// Collection 0x01
-    0x85, 0x03,             // REPORT_ID (3)
-	0x75, 0x08,				// report size = 8 bits
-	0x15, 0x00,				// logical minimum = 0
-	0x26, 0xFF, 0x00,		// logical maximum = 255
-
-	0x95, 64,				// report count TX
-	0x09, 0x01,				// usage
-	0x81, 0x02,				// Input (array)
-
-	0x95, 64,				// report count RX
-	0x09, 0x02,				// usage
-	0x91, 0x02,				// Output (array)
-	0xC0					// end collection
-};
-
-u8 _cdcComposite = 0;
-
-bool SendDescriptor()
-{
-	Setup& setup = _setup;
-	u8 desc_length = 0;
-	const u8* desc_addr = 0;
-
-	u8 t = setup.wValueH;
-	if (0x22 == t)
-	{
-		desc_addr = _rawHID;
-		desc_length = sizeof(desc_length);
-	} else if (USB_DEVICE_DESCRIPTOR_TYPE == t)
-	{
-		if (setup.wLength == 8)
-			_cdcComposite = 1;
-		desc_addr = _cdcComposite ?  (const u8*)&USB_DeviceDescriptorA : (const u8*)&USB_DeviceDescriptor;
-	}
-	else if (USB_CONFIGURATION_DESCRIPTOR_TYPE == t)
-	{
-		desc_addr = (const u8*)&USB_ConfigDescriptor;
-		desc_length = sizeof(USB_ConfigDescriptor);
-	}
-	else if (USB_STRING_DESCRIPTOR_TYPE == t)
-	{
-		if (setup.wValueL == 0)
-			desc_addr = (const u8*)&STRING_LANGUAGE;
-		else if (setup.wValueL == IPRODUCT) 
-			desc_addr = (const u8*)&STRING_IPRODUCT;
-		else if (setup.wValueL == ISERIAL)
-			desc_addr = (const u8*)&STRING_SERIAL;
-		else if (setup.wValueL == IMANUFACTURER)
-			desc_addr = (const u8*)&STRING_IMANUFACTURER;
-		else
-			return false;
-	} else 
-		return false;
-
-	if (desc_length == 0)
-		desc_length = pgm_read_byte(desc_addr);
-	if ((u8)setup.wLength < desc_length)		// bit of a cheat limiting to 255 bytes TODO (saved 8 bytes)
-		desc_length = (u8)setup.wLength;
-
-	//	Send descriptor
-	//	EP0 is 64 bytes long
-	//	RWAL and FIFOCON don't work on EP0
-	u8 n = 0;
-	do
-	{
-		if (!WaitForINOrOUT())
-			return false;
-		Send8(pgm_read_byte(&desc_addr[n++]));
-		u8 clr = n & 0x3F;
-		if (!clr)
-			ClearIN();	// Fifo is full, release this packet
-	} while (n < desc_length);
-	return true;
-}
-
-void USBSetupInterrupt()
-{
-    SetEP(0);
-	if (!ReceivedSetupInt())
-		return;
-
-	Setup& setup = _setup;	// global saves ~30 bytes
-	Recv((u8*)&setup,8);
-	ClearSetupInt();
-
-	if (setup.bmRequestType & DEVICETOHOST)
-		WaitIN();
-	else
-		ClearIN();
-
-    bool ok = true;
-	u8 r = setup.bRequest;
-	if (SET_ADDRESS == r)
-	{
-		WaitIN();
-		UDADDR = setup.wValueL | (1<<ADDEN);
-	}
-	else if (SET_CONFIGURATION == r)
-	{
-		_usbConfiguration = setup.wValueL;
-		InitEndpoints();
-	}
-	else if (GET_CONFIGURATION == r)
-	{
-		Send8(_usbConfiguration);
-	}
-	else if (GET_STATUS == r)
-	{
-		Send8(0);		// All good as far as I know
-	}
-	else if (GET_DESCRIPTOR == r)
-	{
-		ok = SendDescriptor();
-	}
-	else
-	{
-		ok = USBHook();
-	}
-
-	if (ok)
-		ClearIN();
-	else
-		Stall();
-}
-
-void USBGeneralInterrupt()
-{
-	u8 udint = UDINT;
-	UDINT = 0;
-
-	//	End of Reset
-	if (udint & (1<<EORSTI))
-	{
-		InitEP(0,EP_TYPE_CONTROL,EP_SINGLE_64);	// init ep0
-		_usbConfiguration = 0;			// not configured yet
-	}
-
-	//	Start of Frame - happens every millisecond so we use it for TX and RX LED one-shot timing, too
-	if (udint & (1<<SOFI))
-	{
-		// check whether the one-shot period has elapsed.  if so, turn off the LED
-		if (TxLEDPulse && !(--TxLEDPulse))
-			TXLED0;
-		if (RxLEDPulse && !(--RxLEDPulse))
-			RXLED0;
-		
-		if (!_ejected)
-			_timeout = 0;
-	}
-}
-
-void LEDPulse();
-int USBGetChar()
-{
-	for(;;)
-	{
-		USBSetupInterrupt();
-		USBGeneralInterrupt();
-
-		//	Read a char
-		if (HasData(CDC_RX))
-		{
-			u8 c = Recv8();
-			if (!ReadWriteAllowed())
-				ReleaseRX();
-			return c;
-		} 
-
-		if (!--_timeout) {
-			Reboot();	// USB not connected, run firmware
-		}
-		
-		_delay_us(100);	// stretch out the bootloader period to about 5 seconds after enumeration
-		LEDPulse();
-	}
-	return -1;
-}
diff --git a/bootloaders/diskloader/src/USBCore.h b/bootloaders/diskloader/src/USBCore.h
deleted file mode 100644
index 537c0ec..0000000
--- a/bootloaders/diskloader/src/USBCore.h
+++ /dev/null
@@ -1,246 +0,0 @@
-
-// Copyright (c) 2010, Peter Barrett 
-/*
-** Permission to use, copy, modify, and/or distribute this software for  
-** any purpose with or without fee is hereby granted, provided that the  
-** above copyright notice and this permission notice appear in all copies.  
-**  
-** THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS 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, DIRECT, 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.  
-*/
-
-#ifndef __USBCORE_H__
-#define __USBCORE_H__
-
-#define GET_STATUS			0
-#define CLEAR_FEATURE		1
-#define SET_FEATURE			3
-#define SET_ADDRESS			5
-#define GET_DESCRIPTOR		6
-#define GET_CONFIGURATION	8
-#define SET_CONFIGURATION	9
-#define GET_INTERFACE		10
-#define SET_INTERFACE		11
-
-// bmRequestType
-#define HOSTTODEVICE	0x00
-#define DEVICETOHOST	0x80
-#define STANDARD		0x00
-#define CLASS			0x20
-#define VENDOR			0x40
-#define DEVICE			0x00
-#define INTERFACE		0x01
-#define ENDPOINT		0x02
-#define OTHER			0x03
-
-#define CDC_SET_LINE_CODING		0x20
-#define CDC_GET_LINE_CODING		0x21
-#define CDC_SET_CONTROL_LINE_STATE	0x22
-
-//	Descriptors
-
-#define USB_DEVICE_DESC_SIZE 18
-#define USB_CONFIGUARTION_DESC_SIZE 9
-#define USB_INTERFACE_DESC_SIZE 9
-#define USB_ENDPOINT_DESC_SIZE 7
-
-#define USB_DEVICE_DESCRIPTOR_TYPE             1
-#define USB_CONFIGURATION_DESCRIPTOR_TYPE      2
-#define USB_STRING_DESCRIPTOR_TYPE             3
-#define USB_INTERFACE_DESCRIPTOR_TYPE          4
-#define USB_ENDPOINT_DESCRIPTOR_TYPE           5
-
-#define USB_DEVICE_CLASS_COMMUNICATIONS        0x02
-#define USB_DEVICE_CLASS_HUMAN_INTERFACE       0x03
-#define USB_DEVICE_CLASS_STORAGE               0x08
-#define USB_DEVICE_CLASS_VENDOR_SPECIFIC       0xFF
-
-#define USB_CONFIG_POWERED_MASK                0x40
-#define USB_CONFIG_BUS_POWERED                 0x80
-#define USB_CONFIG_SELF_POWERED                0xC0
-#define USB_CONFIG_REMOTE_WAKEUP               0x20
-
-// bMaxPower in Configuration Descriptor
-#define USB_CONFIG_POWER_MA(mA)                ((mA)/2)
-
-// bEndpointAddress in Endpoint Descriptor
-#define USB_ENDPOINT_DIRECTION_MASK            0x80
-#define USB_ENDPOINT_OUT(addr)                 ((addr) | 0x00)
-#define USB_ENDPOINT_IN(addr)                  ((addr) | 0x80)
-
-#define USB_ENDPOINT_TYPE_MASK                 0x03
-#define USB_ENDPOINT_TYPE_CONTROL              0x00
-#define USB_ENDPOINT_TYPE_ISOCHRONOUS          0x01
-#define USB_ENDPOINT_TYPE_BULK                 0x02
-#define USB_ENDPOINT_TYPE_INTERRUPT            0x03
-
-#define TOBYTES(x) ((x) & 0xFF),(((x) >> 8) & 0xFF)
-
-#define CDC_V1_10                               0x0110
-#define CDC_COMMUNICATION_INTERFACE_CLASS       0x02
-
-#define CDC_CALL_MANAGEMENT                     0x01
-#define CDC_ABSTRACT_CONTROL_MODEL              0x02
-#define CDC_HEADER                              0x00
-#define CDC_ABSTRACT_CONTROL_MANAGEMENT         0x02
-#define CDC_UNION                               0x06
-#define CDC_CS_INTERFACE                        0x24
-#define CDC_CS_ENDPOINT                         0x25
-#define CDC_DATA_INTERFACE_CLASS                0x0A
-
-
-//	Device
-typedef struct {
-	u8 len;				// 18
-	u8 dtype;			// 1 USB_DEVICE_DESCRIPTOR_TYPE
-	u16 usbVersion;		// 0x200
-	u8	deviceClass;
-	u8	deviceSubClass;
-	u8	deviceProtocol;
-	u8	packetSize0;	// Packet 0
-	u16	idVendor;
-	u16	idProduct;
-	u16	deviceVersion;	// 0x100
-	u8	iManufacturer;
-	u8	iProduct;
-	u8	iSerialNumber;
-	u8	bNumConfigurations;
-} DeviceDescriptor;
-
-//	Config
-typedef struct {
-	u8	len;			// 9
-	u8	dtype;			// 2
-	u16 clen;			// total length
-	u8	numInterfaces;
-	u8	config;
-	u8	iconfig;
-	u8	attributes;
-	u8	maxPower;
-} ConfigDescriptor;
-
-//	String
-
-//	Interface
-typedef struct
-{
-	u8 len;		// 9
-	u8 dtype;	// 4
-	u8 number;
-	u8 alternate;
-	u8 numEndpoints;
-	u8 interfaceClass;
-	u8 interfaceSubClass;
-	u8 protocol;
-	u8 iInterface;
-} InterfaceDescriptor;
-
-//	Endpoint
-typedef struct
-{
-	u8 len;		// 7
-	u8 dtype;	// 5
-	u8 addr;
-	u8 attr;
-	u16 packetSize;
-	u8 interval;
-} EndpointDescriptor;
-
-// Interface Association Descriptor
-// Used to bind 2 interfaces together in CDC compostite device
-typedef struct
-{
-	u8 len;				// 8
-	u8 dtype;			// 11
-	u8 firstInterface;
-	u8 interfaceCount;
-	u8 functionClass;
-	u8 funtionSubClass;
-	u8 functionProtocol;
-	u8 iInterface;
-} IADDescriptor;
-
-//	CDC CS interface descriptor
-typedef struct
-{
-	u8 len;		// 5
-	u8 dtype;	// 0x24
-	u8 subtype;
-	u8 d0;
-	u8 d1;
-} CDCCSInterfaceDescriptor;
-
-typedef struct
-{
-	u8 len;		// 4
-	u8 dtype;	// 0x24
-	u8 subtype;
-	u8 d0;
-} CDCCSInterfaceDescriptor4;
-
-typedef struct 
-{
-	IADDescriptor				iad;	// Only needed on compound device
-
-	//	Control
-	InterfaceDescriptor			cif;	// 
-	CDCCSInterfaceDescriptor	header;
-	CDCCSInterfaceDescriptor	callManagement;
-	CDCCSInterfaceDescriptor4	controlManagement;
-	CDCCSInterfaceDescriptor	functionalDescriptor;
-	EndpointDescriptor			cifin;
-
-	//	Data
-	InterfaceDescriptor			dif;
-	EndpointDescriptor			in;
-	EndpointDescriptor			out;
-} CDCDescriptor;
-
-typedef struct
-{
-	u8 len;			// 9
-	u8 dtype;		// 0x21
-	u8 addr;
-	u8	versionL;	// 0x101
-	u8	versionH;	// 0x101
-	u8	country;
-	u8	desctype;	// 0x22 report
-	u8	descLenL;
-	u8	descLenH;
-} HIDDescDescriptor;
-
-typedef struct 
-{
-	InterfaceDescriptor			hid;
-	HIDDescDescriptor			desc;
-	EndpointDescriptor			in;
-} HIDDescriptor;
-
-#define D_DEVICE(_class,_subClass,_proto,_packetSize0,_vid,_pid,_version,_im,_ip,_is,_configs) \
-	{ 18, 1, 0x200, _class,_subClass,_proto,_packetSize0,_vid,_pid,_version,_im,_ip,_is,_configs }
-
-#define D_CONFIG(_totalLength,_interfaces) \
-	{ 9, 2, _totalLength,_interfaces, 1, 0, USB_CONFIG_BUS_POWERED, USB_CONFIG_POWER_MA(100) }
-
-#define D_INTERFACE(_n,_numEndpoints,_class,_subClass,_protocol) \
-	{ 9, 4, _n, 0, _numEndpoints, _class,_subClass, _protocol, 0 }
-
-#define D_ENDPOINT(_addr,_attr,_packetSize, _interval) \
-	{ 7, 5, _addr,_attr,_packetSize, _interval }
-
-#define D_IAD(_firstInterface, _count, _class, _subClass, _protocol) \
-	{ 8, 11, _firstInterface, _count, _class, _subClass, _protocol, 0 }
-
-#define D_HIDREPORT(_descriptorLength) \
-	{ 9, 0x21, 0x1, 0x1, 0, 1, 0x22, _descriptorLength, 0 }
-
-#define D_CDCCS(_subtype,_d0,_d1)	{ 5, 0x24, _subtype, _d0, _d1 }
-#define D_CDCCS4(_subtype,_d0)		{ 4, 0x24, _subtype, _d0 }
-
-#endif
\ No newline at end of file
diff --git a/bootloaders/diskloader/src/USBDesc.cpp b/bootloaders/diskloader/src/USBDesc.cpp
deleted file mode 100644
index ade072a..0000000
--- a/bootloaders/diskloader/src/USBDesc.cpp
+++ /dev/null
@@ -1,87 +0,0 @@
-
-
-/* Copyright (c) 2011, Peter Barrett  
-**  
-** Permission to use, copy, modify, and/or distribute this software for  
-** any purpose with or without fee is hereby granted, provided that the  
-** above copyright notice and this permission notice appear in all copies.  
-** 
-** THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS 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, DIRECT, 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.  
-*/
-
-#include "Platform.h"
-
-//====================================================================================================
-//====================================================================================================
-//	Actual device descriptors
-
-const u16 STRING_LANGUAGE[2] = {
-	(3<<8) | (2+2),
-	0x0409	// English
-};
-
-const u16 STRING_SERIAL[13] = {
-	(3<<8) | (2+2*12),
-	USB_SERIAL_STRING
-};
-
-const u16 STRING_IPRODUCT[28] = {
-	(3<<8) | (2+2*27),
-#if USB_PID == USB_PID_LEONARDO	
-	'A','r','d','u','i','n','o',' ','L','e','o','n','a','r','d','o',' ','b','o','o','t','l','o','a','d','e','r'
-#elif USB_PID == USB_PID_MICRO
-	'A','r','d','u','i','n','o',' ','M','i','c','r','o',' ','b','o','o','t','l','o','a','d','e','r',' ',' ',' '
-#endif
-};
-
-const u16 STRING_IMANUFACTURER[12] = {
-	(3<<8) | (2+2*11),
-	'A','r','d','u','i','n','o',' ','L','L','C'
-};
-
-
-//#ifdef CDC_ENABLED
-DeviceDescriptor USB_DeviceDescriptorA = D_DEVICE(0X02,0X00,0X00,64,USB_VID,USB_PID,0x100,0,IPRODUCT,ISERIAL,1);
-//#else
-DeviceDescriptor USB_DeviceDescriptor = D_DEVICE(0x00,0x00,0x00,64,USB_VID,USB_PID,0x100,0,IPRODUCT,ISERIAL,1);
-//#endif
-
-
-Config USB_ConfigDescriptor =
-{
-	D_CONFIG(sizeof(Config),INTERFACE_COUNT),
-
-#ifdef CDC_ENABLED
-	//	CDC
-	{
-		D_IAD(0,2,CDC_COMMUNICATION_INTERFACE_CLASS,CDC_ABSTRACT_CONTROL_MODEL,1),
-
-		//	CDC communication interface
-		D_INTERFACE(CDC_ACM_INTERFACE,1,CDC_COMMUNICATION_INTERFACE_CLASS,CDC_ABSTRACT_CONTROL_MODEL,0),
-		D_CDCCS(CDC_HEADER,0x10,0x01),								// Header (1.10 bcd)
-		D_CDCCS(CDC_CALL_MANAGEMENT,1,1),							// Device handles call management
-		D_CDCCS4(CDC_ABSTRACT_CONTROL_MANAGEMENT,2),				// SET_LINE_CODING, GET_LINE_CODING, SET_CONTROL_LINE_STATE supported
-		D_CDCCS(CDC_UNION,CDC_ACM_INTERFACE,CDC_DATA_INTERFACE),	// Communication interface is master, data interface is slave 0
-		D_ENDPOINT(USB_ENDPOINT_IN (CDC_ENDPOINT_ACM),USB_ENDPOINT_TYPE_INTERRUPT,0x10,0x40),
-
-		//	CDC data interface
-		D_INTERFACE(CDC_DATA_INTERFACE,2,CDC_DATA_INTERFACE_CLASS,0,0),
-		D_ENDPOINT(USB_ENDPOINT_OUT(CDC_ENDPOINT_OUT),USB_ENDPOINT_TYPE_BULK,0x40,0),
-		D_ENDPOINT(USB_ENDPOINT_IN (CDC_ENDPOINT_IN ),USB_ENDPOINT_TYPE_BULK,0x40,0)
-	},
-#endif
-	// HID
-	{
-		D_INTERFACE(HID_INTERFACE,1,3,0,0),
-		D_HIDREPORT(30),
-		D_ENDPOINT(USB_ENDPOINT_IN (HID_ENDPOINT_INT),USB_ENDPOINT_TYPE_INTERRUPT,0x40,0x40)
-	}
-};
-
diff --git a/bootloaders/diskloader/src/USBDesc.h b/bootloaders/diskloader/src/USBDesc.h
deleted file mode 100644
index a970fa4..0000000
--- a/bootloaders/diskloader/src/USBDesc.h
+++ /dev/null
@@ -1,65 +0,0 @@
-
-
-/* Copyright (c) 2011, Peter Barrett  
-**  
-** Permission to use, copy, modify, and/or distribute this software for  
-** any purpose with or without fee is hereby granted, provided that the  
-** above copyright notice and this permission notice appear in all copies.  
-** 
-** THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS 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, DIRECT, 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.  
-*/
-
-
-#ifdef CDC_ENABLED
-
-#define CDC_ACM_INTERFACE	0	// CDC ACM
-#define CDC_DATA_INTERFACE	1	// CDC Data
-#define CDC_ENDPOINT_ACM	1
-#define CDC_ENDPOINT_OUT	2
-#define CDC_ENDPOINT_IN		3
-
-#define HID_INTERFACE		2	// HID Interface
-#define HID_ENDPOINT_INT	4
-
-#define INTERFACE_COUNT		3	// 2 for cdc + 1 for hid
-
-#else 
-
-#define HID_INTERFACE		2	// HID Interface
-#define HID_ENDPOINT_INT	4
-
-#define INTERFACE_COUNT		1	// 1 for hid
-
-#endif
-
-typedef struct
-{
-	ConfigDescriptor	config;
-#ifdef CDC_ENABLED
-	CDCDescriptor		cdc;
-#endif
-	HIDDescriptor		hid;
-} Config;
-
-extern Config USB_ConfigDescriptor PROGMEM;
-extern DeviceDescriptor USB_DeviceDescriptor PROGMEM;
-extern DeviceDescriptor USB_DeviceDescriptorA PROGMEM;
-
-extern const u16 STRING_LANGUAGE[2] PROGMEM;
-extern const u16 STRING_IPRODUCT[28] PROGMEM;
-extern const u16 STRING_IMANUFACTURER[12] PROGMEM;
-extern const u16 STRING_SERIAL[13] PROGMEM;
-
-#define IMANUFACTURER	1
-#define IPRODUCT		2
-#define ISERIAL			3
-
-#define CDC_TX CDC_ENDPOINT_IN
-#define CDC_RX CDC_ENDPOINT_OUT
\ No newline at end of file
diff --git a/cores/arduino/CDC.cpp b/cores/arduino/CDC.cpp
index 14a0eae..1ee3a48 100644
--- a/cores/arduino/CDC.cpp
+++ b/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)
 {
 }
 
-int Serial_::available(void)
+void Serial_::accept(void) 
 {
-	u8 avail = USB_Available(CDC_RX);
-	if (_serialPeek != -1)
-		avail++;
-	return avail;
+	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)
+{
+	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/cores/arduino/HID.cpp b/cores/arduino/HID.cpp
index 8ed1566..ac63608 100644
--- a/cores/arduino/HID.cpp
+++ b/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;
 }
@@ -254,7 +261,15 @@ bool Mouse_::isPressed(uint8_t b)
 //================================================================================
 //	Keyboard
 
-Keyboard_::Keyboard_() : _keyMap(0)
+Keyboard_::Keyboard_(void) 
+{
+}
+
+void Keyboard_::begin(void) 
+{
+}
+
+void Keyboard_::end(void) 
 {
 }
 
@@ -263,11 +278,6 @@ void Keyboard_::sendReport(KeyReport* keys)
 	HID_SendReport(2,keys,sizeof(KeyReport));
 }
 
-void Keyboard_::setKeyMap(KeyMap* keyMap)
-{
-	_keyMap = keyMap;
-}
-
 extern
 const uint8_t _asciimap[128] PROGMEM;
 
@@ -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;
-			}
-			keys.keys[0] = c;
+	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;
 		}
-		sendReport(&keys);
 	}
-	//	Keyup
-	{
-		KeyReport keys = {0};
-		sendReport(&keys);
+	
+	// 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;
+			}
+		}
+		if (i == 6) {
+			setWriteError();
+			return 0;
+		}	
 	}
+	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/cores/arduino/HardwareSerial.cpp b/cores/arduino/HardwareSerial.cpp
index 9985b78..f40ddee 100644
--- a/cores/arduino/HardwareSerial.cpp
+++ b/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/cores/arduino/HardwareSerial.h b/cores/arduino/HardwareSerial.h
index 176abe1..bf4924c 100644
--- a/cores/arduino/HardwareSerial.h
+++ b/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/cores/arduino/Stream.cpp b/cores/arduino/Stream.cpp
index 3d5b905..aafb7fc 100644
--- a/cores/arduino/Stream.cpp
+++ b/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/cores/arduino/Stream.h b/cores/arduino/Stream.h
index 13f11be..58bbf75 100644
--- a/cores/arduino/Stream.h
+++ b/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/cores/arduino/USBAPI.h b/cores/arduino/USBAPI.h
index 26a2032..d5abdb6 100644
--- a/cores/arduino/USBAPI.h
+++ b/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/cores/arduino/USBCore.cpp b/cores/arduino/USBCore.cpp
index 4c71b34..6766be6 100644
--- a/cores/arduino/USBCore.cpp
+++ b/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
@@ -230,7 +234,7 @@ int USB_Recv(u8 ep, void* d, int len)
 	n = len;
 	u8* dst = (u8*)d;
 	while (n--)
-		*dst++ = USBD_Recv8();
+		*dst++ = Recv8();
 	if (len && !FifoByteCount())	// release empty buffer
 		ReleaseRX();
 	
@@ -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/cores/arduino/USBDesc.h b/cores/arduino/USBDesc.h
index 549ed9e..900713e 100644
--- a/cores/arduino/USBDesc.h
+++ b/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/cores/arduino/WInterrupts.c b/cores/arduino/WInterrupts.c
old mode 100755
new mode 100644
index 3b9fe08..8f3ec84
--- a/cores/arduino/WInterrupts.c
+++ b/cores/arduino/WInterrupts.c
@@ -47,7 +47,19 @@ 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;	
+#elif defined(EICRA) && defined(EICRB) && defined(EIMSK)
     case 2:
       EICRA = (EICRA & ~((1 << ISC00) | (1 << ISC01))) | (mode << ISC00);
       EIMSK |= (1 << INT0);
@@ -80,7 +92,7 @@ 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 +146,14 @@ 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;		
+#elif defined(EICRA) && defined(EICRB) && defined(EIMSK)
     case 2:
       EIMSK &= ~(1 << INT0);
       break;
@@ -196,7 +215,18 @@ 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]();
+}
+
+#elif defined(EICRA) && defined(EICRB)
 
 SIGNAL(INT0_vect) {
   if(intFunc[EXTERNAL_INT_2])
diff --git a/cores/arduino/main.cpp b/cores/arduino/main.cpp
old mode 100755
new mode 100644
index 34450f4..3d4e079
--- a/cores/arduino/main.cpp
+++ b/cores/arduino/main.cpp
@@ -5,7 +5,7 @@ int main(void)
 	init();
 
 #if defined(USBCON)
-	USB.attach();
+	USBDevice.attach();
 #endif
 	
 	setup();
diff --git a/cores/arduino/wiring.c b/cores/arduino/wiring.c
old mode 100755
new mode 100644
index e7f7cde..ac8bb6f
--- a/cores/arduino/wiring.c
+++ b/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/cores/arduino/wiring_analog.c b/cores/arduino/wiring_analog.c
index a8bc817..0e9881f 100644
--- a/cores/arduino/wiring_analog.c
+++ b/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/cores/arduino/wiring_digital.c b/cores/arduino/wiring_digital.c
old mode 100755
new mode 100644
index 584a28a..be323b1
--- a/cores/arduino/wiring_digital.c
+++ b/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/libraries/EEPROM/examples/eeprom_read/eeprom_read.ino b/libraries/EEPROM/examples/eeprom_read/eeprom_read.ino
index 88e3488..0709b2d 100644
--- a/libraries/EEPROM/examples/eeprom_read/eeprom_read.ino
+++ b/libraries/EEPROM/examples/eeprom_read/eeprom_read.ino
@@ -14,7 +14,11 @@ byte value;
 
 void setup()
 {
+  // initialize serial and wait for port to open:
   Serial.begin(9600);
+  while (!Serial) {
+    ; // wait for serial port to connect. Needed for Leonardo only
+  }
 }
 
 void loop()
diff --git a/libraries/Ethernet/examples/ChatServer/ChatServer.ino b/libraries/Ethernet/examples/ChatServer/ChatServer.ino
index de75257..d50e5a6 100644
--- a/libraries/Ethernet/examples/ChatServer/ChatServer.ino
+++ b/libraries/Ethernet/examples/ChatServer/ChatServer.ino
@@ -12,7 +12,7 @@
  
  created 18 Dec 2009
  by David A. Mellis
- modified 12 March 2012
+ modified 9 Apr 2012
  by Tom Igoe
  
  */
@@ -39,8 +39,13 @@ void setup() {
   Ethernet.begin(mac, ip, gateway, subnet);
   // start listening for clients
   server.begin();
-  // open the serial port
+ // Open serial communications and wait for port to open:
   Serial.begin(9600);
+   while (!Serial) {
+    ; // wait for serial port to connect. Needed for Leonardo only
+  }
+
+
   Serial.print("Chat server address:");
   Serial.println(Ethernet.localIP());
 }
diff --git a/libraries/Ethernet/examples/DhcpAddressPrinter/DhcpAddressPrinter.ino b/libraries/Ethernet/examples/DhcpAddressPrinter/DhcpAddressPrinter.ino
index 630dd17..5eaaf24 100644
--- a/libraries/Ethernet/examples/DhcpAddressPrinter/DhcpAddressPrinter.ino
+++ b/libraries/Ethernet/examples/DhcpAddressPrinter/DhcpAddressPrinter.ino
@@ -9,6 +9,7 @@
  * Ethernet shield attached to pins 10, 11, 12, 13
  
  created 12 April 2011
+ modified 9 Apr 2012
  by Tom Igoe
  
  */
@@ -27,8 +28,13 @@ byte mac[] = {
 EthernetClient client;
 
 void setup() {
-  // start the serial library:
+ // Open serial communications and wait for port to open:
   Serial.begin(9600);
+  // this check is only needed on the Leonardo:
+   while (!Serial) {
+    ; // wait for serial port to connect. Needed for Leonardo only
+  }
+
   // start the Ethernet connection:
   if (Ethernet.begin(mac) == 0) {
     Serial.println("Failed to configure Ethernet using DHCP");
diff --git a/libraries/Ethernet/examples/DhcpChatServer/DhcpChatServer.ino b/libraries/Ethernet/examples/DhcpChatServer/DhcpChatServer.ino
index 5082054..09cbd43 100644
--- a/libraries/Ethernet/examples/DhcpChatServer/DhcpChatServer.ino
+++ b/libraries/Ethernet/examples/DhcpChatServer/DhcpChatServer.ino
@@ -12,6 +12,7 @@
  * Ethernet shield attached to pins 10, 11, 12, 13
  
  created 21 May 2011
+ modified 9 Apr 2012
  by Tom Igoe
  Based on ChatServer example by David A. Mellis
  
@@ -34,8 +35,14 @@ EthernetServer server(23);
 boolean gotAMessage = false; // whether or not you got a message from the client yet
 
 void setup() {
-   // open the serial port
+  // Open serial communications and wait for port to open:
   Serial.begin(9600);
+  // this check is only needed on the Leonardo:
+   while (!Serial) {
+    ; // wait for serial port to connect. Needed for Leonardo only
+  }
+
+
   // start the Ethernet connection:
   Serial.println("Trying to get an IP address using DHCP");
   if (Ethernet.begin(mac) == 0) {
diff --git a/libraries/Ethernet/examples/DnsWebClient/DnsWebClient.ino b/libraries/Ethernet/examples/DnsWebClient/DnsWebClient.ino
index 5c7a53a..c14abf4 100644
--- a/libraries/Ethernet/examples/DnsWebClient/DnsWebClient.ino
+++ b/libraries/Ethernet/examples/DnsWebClient/DnsWebClient.ino
@@ -9,7 +9,7 @@
  
  created 18 Dec 2009
  by David A. Mellis
- modified 12 April 2011
+ modified 9 Apr 2012
  by Tom Igoe, based on work by Adrian McEwen
  
  */
@@ -28,8 +28,13 @@ char serverName[] = "www.google.com";
 EthernetClient client;
 
 void setup() {
-  // start the serial library:
+ // Open serial communications and wait for port to open:
   Serial.begin(9600);
+   while (!Serial) {
+    ; // wait for serial port to connect. Needed for Leonardo only
+  }
+
+
   // start the Ethernet connection:
   if (Ethernet.begin(mac) == 0) {
     Serial.println("Failed to configure Ethernet using DHCP");
diff --git a/libraries/Ethernet/examples/PachubeClient/PachubeClient.ino b/libraries/Ethernet/examples/PachubeClient/PachubeClient.ino
index 4d4290d..dfd2d40 100644
--- a/libraries/Ethernet/examples/PachubeClient/PachubeClient.ino
+++ b/libraries/Ethernet/examples/PachubeClient/PachubeClient.ino
@@ -16,7 +16,7 @@
  * Ethernet shield attached to pins 10, 11, 12, 13
  
  created 15 March 2010
- updated 16 Mar 2012
+ modified 9 Apr 2012
  by Tom Igoe with input from Usman Haque and Joe Saavedra
  
 http://arduino.cc/en/Tutorial/PachubeClient
@@ -53,8 +53,13 @@ boolean lastConnected = false;                 // state of the connection last t
 const unsigned long postingInterval = 10*1000; //delay between updates to Pachube.com
 
 void setup() {
-  // start serial port:
+ // Open serial communications and wait for port to open:
   Serial.begin(9600);
+   while (!Serial) {
+    ; // wait for serial port to connect. Needed for Leonardo only
+  }
+
+
  // start the Ethernet connection:
   if (Ethernet.begin(mac) == 0) {
     Serial.println("Failed to configure Ethernet using DHCP");
diff --git a/libraries/Ethernet/examples/PachubeClientString/PachubeClientString.ino b/libraries/Ethernet/examples/PachubeClientString/PachubeClientString.ino
index 3535287..2a96e9f 100644
--- a/libraries/Ethernet/examples/PachubeClientString/PachubeClientString.ino
+++ b/libraries/Ethernet/examples/PachubeClientString/PachubeClientString.ino
@@ -1,12 +1,12 @@
 /*
-  Pachube sensor client with Strings
+  Cosm sensor client with Strings
  
- This sketch connects an analog sensor to Pachube (http://www.pachube.com)
+ This sketch connects an analog sensor to Cosm (http://www.cosm.com)
  using a Wiznet Ethernet shield. You can use the Arduino Ethernet shield, or
  the Adafruit Ethernet shield, either one will work, as long as it's got
  a Wiznet Ethernet module on board.
  
- This example has been updated to use version 2.0 of the Pachube.com API. 
+ This example has been updated to use version 2.0 of the Cosm.com API. 
  To make it work, create a feed with two datastreams, and give them the IDs
  sensor1 and sensor2. Or change the code below to match your feed.
  
@@ -18,10 +18,10 @@
  * Ethernet shield attached to pins 10, 11, 12, 13
  
  created 15 March 2010
- updated 16 Mar 2012
+ modified 9 Apr 2012
  by Tom Igoe with input from Usman Haque and Joe Saavedra
  
- http://arduino.cc/en/Tutorial/PachubeClientString
+ http://arduino.cc/en/Tutorial/CosmClientString
  This code is in the public domain.
  
  */
@@ -30,14 +30,16 @@
 #include <Ethernet.h>
 
 
-#define APIKEY         "YOUR API KEY GOES HERE" // replace your pachube api key here
+/#define APIKEY         "YOUR API KEY GOES HERE" // replace your Cosm api key here
 #define FEEDID         00000 // replace your feed ID
 #define USERAGENT      "My Project" // user agent is the project name
 
+
 // assign a MAC address for the ethernet controller.
 // fill in your address here:
   byte mac[] = { 
   0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};
+
 // fill in an available IP address on your network here,
 // for manual configuration:
 IPAddress ip(10,0,1,20);
@@ -47,16 +49,21 @@ EthernetClient client;
 
 // if you don't want to use DNS (and reduce your sketch size)
 // use the numeric IP instead of the name for the server:
-//IPAddress server(216,52,233,122);      // numeric IP for api.pachube.com
-char server[] = "api.pachube.com";   // name address for pachube API
+IPAddress server(216,52,233,121);      // numeric IP for api.cosm.com
+//char server[] = "api.cosm.com";   // name address for Cosm API
 
 unsigned long lastConnectionTime = 0;          // last time you connected to the server, in milliseconds
 boolean lastConnected = false;                 // state of the connection last time through the main loop
-const unsigned long postingInterval = 10*1000;  //delay between updates to Pachube.com
+const unsigned long postingInterval = 10*1000;  //delay between updates to Cosm.com
 
 void setup() {
-  // start serial port:
+ // Open serial communications and wait for port to open:
   Serial.begin(9600);
+  while (!Serial) {
+    ; // wait for serial port to connect. Needed for Leonardo only
+  }
+
+
   // give the ethernet module time to boot up:
   delay(1000);
   // start the Ethernet connection:
@@ -76,7 +83,7 @@ void loop() {
   dataString += sensorReading;
 
   // you can append multiple readings to this String if your
-  // pachube feed is set up to handle multiple values:
+  // Cosm feed is set up to handle multiple values:
   int otherSensorReading = analogRead(A1);
   dataString += "\nsensor2,";
   dataString += otherSensorReading;
@@ -116,8 +123,8 @@ void sendData(String thisData) {
     client.print("PUT /v2/feeds/");
     client.print(FEEDID);
     client.println(".csv HTTP/1.1");
-    client.println("Host: api.pachube.com");
-    client.print("X-PachubeApiKey: ");
+    client.println("Host: api.cosm.com");
+    client.print("X-CosmApiKey: ");
     client.println(APIKEY);
     client.print("User-Agent: ");
     client.println(USERAGENT);
diff --git a/libraries/Ethernet/examples/TelnetClient/TelnetClient.ino b/libraries/Ethernet/examples/TelnetClient/TelnetClient.ino
index 5cf1ad8..3457125 100644
--- a/libraries/Ethernet/examples/TelnetClient/TelnetClient.ino
+++ b/libraries/Ethernet/examples/TelnetClient/TelnetClient.ino
@@ -13,6 +13,7 @@
  * Ethernet shield attached to pins 10, 11, 12, 13
  
  created 14 Sep 2010
+ modified 9 Apr 2012
  by Tom Igoe
  
  */
@@ -38,8 +39,13 @@ EthernetClient client;
 void setup() {
   // start the Ethernet connection:
   Ethernet.begin(mac, ip);
-  // start the serial library:
+ // Open serial communications and wait for port to open:
   Serial.begin(9600);
+   while (!Serial) {
+    ; // wait for serial port to connect. Needed for Leonardo only
+  }
+
+
   // give the Ethernet shield a second to initialize:
   delay(1000);
   Serial.println("connecting...");
diff --git a/libraries/Ethernet/examples/TwitterClient/TwitterClient.ino b/libraries/Ethernet/examples/TwitterClient/TwitterClient.ino
index a3b397d..3587d72 100644
--- a/libraries/Ethernet/examples/TwitterClient/TwitterClient.ino
+++ b/libraries/Ethernet/examples/TwitterClient/TwitterClient.ino
@@ -17,6 +17,7 @@
  * Ethernet shield attached to pins 10, 11, 12, 13
  
  created 21 May 2011
+ modified 9 Apr 2012
  by Tom Igoe
  
  This code is in the public domain.
@@ -51,8 +52,13 @@ void setup() {
   currentLine.reserve(256);
   tweet.reserve(150);
 
-  // initialize serial:
+ // Open serial communications and wait for port to open:
   Serial.begin(9600);
+   while (!Serial) {
+    ; // wait for serial port to connect. Needed for Leonardo only
+  }
+
+
   // attempt a DHCP connection:
   Serial.println("Attempting to get an IP address using DHCP:");
   if (!Ethernet.begin(mac)) {
diff --git a/libraries/Ethernet/examples/UdpNtpClient/UdpNtpClient.ino b/libraries/Ethernet/examples/UdpNtpClient/UdpNtpClient.ino
index b4e24b8..93ffe39 100644
--- a/libraries/Ethernet/examples/UdpNtpClient/UdpNtpClient.ino
+++ b/libraries/Ethernet/examples/UdpNtpClient/UdpNtpClient.ino
@@ -9,7 +9,7 @@
  
  created 4 Sep 2010 
  by Michael Margolis
- modified 17 Sep 2010
+ modified 9 Apr 2012
  by Tom Igoe
  
  This code is in the public domain.
@@ -38,7 +38,12 @@ EthernetUDP Udp;
 
 void setup() 
 {
+ // Open serial communications and wait for port to open:
   Serial.begin(9600);
+   while (!Serial) {
+    ; // wait for serial port to connect. Needed for Leonardo only
+  }
+
 
   // start Ethernet and UDP
   if (Ethernet.begin(mac) == 0) {
diff --git a/libraries/Ethernet/examples/WebClient/WebClient.ino b/libraries/Ethernet/examples/WebClient/WebClient.ino
index 1806854..5d5d7f2 100644
--- a/libraries/Ethernet/examples/WebClient/WebClient.ino
+++ b/libraries/Ethernet/examples/WebClient/WebClient.ino
@@ -8,6 +8,7 @@
  * Ethernet shield attached to pins 10, 11, 12, 13
  
  created 18 Dec 2009
+ modified 9 Apr 2012
  by David A. Mellis
  
  */
@@ -26,8 +27,12 @@ IPAddress server(173,194,33,104); // Google
 EthernetClient client;
 
 void setup() {
-  // start the serial library:
+ // Open serial communications and wait for port to open:
   Serial.begin(9600);
+   while (!Serial) {
+    ; // wait for serial port to connect. Needed for Leonardo only
+  }
+
   // start the Ethernet connection:
   if (Ethernet.begin(mac) == 0) {
     Serial.println("Failed to configure Ethernet using DHCP");
diff --git a/libraries/Ethernet/examples/WebServer/WebServer.ino b/libraries/Ethernet/examples/WebServer/WebServer.ino
index 7cf2c53..ce8dbb1 100644
--- a/libraries/Ethernet/examples/WebServer/WebServer.ino
+++ b/libraries/Ethernet/examples/WebServer/WebServer.ino
@@ -10,7 +10,7 @@
  
  created 18 Dec 2009
  by David A. Mellis
- modified 20 Mar 2012
+ modified 9 Apr 2012
  by Tom Igoe
  
  */
@@ -30,7 +30,13 @@ IPAddress ip(192,168,1, 177);
 EthernetServer server(80);
 
 void setup() {
+ // Open serial communications and wait for port to open:
   Serial.begin(9600);
+   while (!Serial) {
+    ; // wait for serial port to connect. Needed for Leonardo only
+  }
+
+
   // start the Ethernet connection and the server:
   Ethernet.begin(mac, ip);
   server.begin();
diff --git a/libraries/Ethernet/utility/w5100.h b/libraries/Ethernet/utility/w5100.h
index 153aedb..8dccd9f 100755
--- a/libraries/Ethernet/utility/w5100.h
+++ b/libraries/Ethernet/utility/w5100.h
@@ -327,7 +327,11 @@ private:
   inline static void initSS()    { DDRB  |=  _BV(4); };
   inline static void setSS()     { PORTB &= ~_BV(4); };
   inline static void resetSS()   { PORTB |=  _BV(4); };
-#elif defined(__AVR_ATmega32U4__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB162__)
+#elif defined(__AVR_ATmega32U4__)
+  inline static void initSS()    { DDRB  |=  _BV(6); };
+  inline static void setSS()     { PORTB &= ~_BV(6); };
+  inline static void resetSS()   { PORTB |=  _BV(6); }; 
+#elif defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB162__)
   inline static void initSS()    { DDRB  |=  _BV(0); };
   inline static void setSS()     { PORTB &= ~_BV(0); };
   inline static void resetSS()   { PORTB |=  _BV(0); }; 
diff --git a/libraries/LiquidCrystal/examples/Autoscroll/Autoscroll.ino b/libraries/LiquidCrystal/examples/Autoscroll/Autoscroll.ino
index 27123ad..1127d8f 100644
--- a/libraries/LiquidCrystal/examples/Autoscroll/Autoscroll.ino
+++ b/libraries/LiquidCrystal/examples/Autoscroll/Autoscroll.ino
@@ -32,7 +32,8 @@
  
  This example code is in the public domain.
 
- http://www.arduino.cc/en/Tutorial/LiquidCrystal
+ http://arduino.cc/en/Tutorial/LiquidCrystalAutoscroll
+
  */
 
 // include the library code:
diff --git a/libraries/LiquidCrystal/examples/Blink/Blink.ino b/libraries/LiquidCrystal/examples/Blink/Blink.ino
index e410424..9667b5d 100644
--- a/libraries/LiquidCrystal/examples/Blink/Blink.ino
+++ b/libraries/LiquidCrystal/examples/Blink/Blink.ino
@@ -32,7 +32,7 @@
  
  This example code is in the public domain.
 
- http://www.arduino.cc/en/Tutorial/LiquidCrystal
+ http://arduino.cc/en/Tutorial/LiquidCrystalBlink
  
  */
 
diff --git a/libraries/LiquidCrystal/examples/Cursor/Cursor.ino b/libraries/LiquidCrystal/examples/Cursor/Cursor.ino
index 28e2a6a..05862a4 100644
--- a/libraries/LiquidCrystal/examples/Cursor/Cursor.ino
+++ b/libraries/LiquidCrystal/examples/Cursor/Cursor.ino
@@ -33,7 +33,8 @@
 
  This example code is in the public domain.
 
- http://www.arduino.cc/en/Tutorial/LiquidCrystal
+ http://arduino.cc/en/Tutorial/LiquidCrystalCursor
+
  */
 
 // include the library code:
diff --git a/libraries/LiquidCrystal/examples/Display/Display.ino b/libraries/LiquidCrystal/examples/Display/Display.ino
index b000731..a85effb 100644
--- a/libraries/LiquidCrystal/examples/Display/Display.ino
+++ b/libraries/LiquidCrystal/examples/Display/Display.ino
@@ -33,7 +33,8 @@
 
  This example code is in the public domain.
 
- http://www.arduino.cc/en/Tutorial/LiquidCrystal
+ http://arduino.cc/en/Tutorial/LiquidCrystalDisplay
+
  */
 
 // include the library code:
diff --git a/libraries/LiquidCrystal/examples/Scroll/Scroll.ino b/libraries/LiquidCrystal/examples/Scroll/Scroll.ino
index 71e5e8c..0d6d8dc 100644
--- a/libraries/LiquidCrystal/examples/Scroll/Scroll.ino
+++ b/libraries/LiquidCrystal/examples/Scroll/Scroll.ino
@@ -33,7 +33,8 @@
  
  This example code is in the public domain.
  
- http://www.arduino.cc/en/Tutorial/LiquidCrystal
+ http://arduino.cc/en/Tutorial/LiquidCrystalScroll
+
  */
 
 // include the library code:
diff --git a/libraries/LiquidCrystal/examples/SerialDisplay/SerialDisplay.ino b/libraries/LiquidCrystal/examples/SerialDisplay/SerialDisplay.ino
index 9727cee..a6f8f40 100644
--- a/libraries/LiquidCrystal/examples/SerialDisplay/SerialDisplay.ino
+++ b/libraries/LiquidCrystal/examples/SerialDisplay/SerialDisplay.ino
@@ -32,7 +32,7 @@
  
  This example code is in the public domain.
  
- http://www.arduino.cc/en/Tutorial/LiquidCrystal
+ http://arduino.cc/en/Tutorial/LiquidCrystalSerial
  */
 
 // include the library code:
diff --git a/libraries/LiquidCrystal/examples/TextDirection/TextDirection.ino b/libraries/LiquidCrystal/examples/TextDirection/TextDirection.ino
index 51bab1f..cabd8ea 100644
--- a/libraries/LiquidCrystal/examples/TextDirection/TextDirection.ino
+++ b/libraries/LiquidCrystal/examples/TextDirection/TextDirection.ino
@@ -32,7 +32,7 @@
  
  This example code is in the public domain.
  
- http://www.arduino.cc/en/Tutorial/LiquidCrystal
+ http://arduino.cc/en/Tutorial/LiquidCrystalTextDirection
  
  */
 
@@ -49,7 +49,6 @@ void setup() {
   lcd.begin(16, 2);
   // turn on the cursor:
   lcd.cursor();
-  Serial.begin(9600);
 }
 
 void loop() {
diff --git a/libraries/LiquidCrystal/examples/setCursor/setCursor.ino b/libraries/LiquidCrystal/examples/setCursor/setCursor.ino
index 3c4edf3..e45c491 100644
--- a/libraries/LiquidCrystal/examples/setCursor/setCursor.ino
+++ b/libraries/LiquidCrystal/examples/setCursor/setCursor.ino
@@ -32,7 +32,8 @@
  
  This example code is in the public domain.
  
- http://www.arduino.cc/en/Tutorial/LiquidCrystal
+ http://arduino.cc/en/Tutorial/LiquidCrystalSetCursor
+
  */
 
 // include the library code:
diff --git a/libraries/SD/examples/CardInfo/CardInfo.ino b/libraries/SD/examples/CardInfo/CardInfo.ino
index fb2f6c3..0c2dfc5 100644
--- a/libraries/SD/examples/CardInfo/CardInfo.ino
+++ b/libraries/SD/examples/CardInfo/CardInfo.ino
@@ -16,7 +16,7 @@
  
  created  28 Mar 2011
  by Limor Fried 
- modified 16 Mar 2011
+ modified 9 Apr 2012
  by Tom Igoe
  */
  // include the SD library:
@@ -35,7 +35,13 @@ const int chipSelect = 4;
 
 void setup()
 {
+ // Open serial communications and wait for port to open:
   Serial.begin(9600);
+   while (!Serial) {
+    ; // wait for serial port to connect. Needed for Leonardo only
+  }
+
+
   Serial.print("\nInitializing SD card...");
   // On the Ethernet Shield, CS is pin 4. It's set as an output by default.
   // Note that even if it's not used as the CS pin, the hardware SS pin 
diff --git a/libraries/SD/examples/Datalogger/Datalogger.ino b/libraries/SD/examples/Datalogger/Datalogger.ino
index 73d81af..a7f85ee 100644
--- a/libraries/SD/examples/Datalogger/Datalogger.ino
+++ b/libraries/SD/examples/Datalogger/Datalogger.ino
@@ -13,7 +13,7 @@
  ** CS - pin 4
  
  created  24 Nov 2010
- updated 2 Dec 2010
+ modified 9 Apr 2012
  by Tom Igoe
  
  This example code is in the public domain.
@@ -30,7 +30,13 @@ const int chipSelect = 4;
 
 void setup()
 {
+ // Open serial communications and wait for port to open:
   Serial.begin(9600);
+   while (!Serial) {
+    ; // wait for serial port to connect. Needed for Leonardo only
+  }
+
+
   Serial.print("Initializing SD card...");
   // make sure that the default chip select pin is set to
   // output, even if you don't use it:
diff --git a/libraries/SD/examples/DumpFile/DumpFile.ino b/libraries/SD/examples/DumpFile/DumpFile.ino
index 961717f..d83089a 100644
--- a/libraries/SD/examples/DumpFile/DumpFile.ino
+++ b/libraries/SD/examples/DumpFile/DumpFile.ino
@@ -12,6 +12,9 @@
  ** CS - pin 4
  
  created  22 December 2010
+ by Limor Fried
+ modified 9 Apr 2012
+ by Tom Igoe
  
  This example code is in the public domain.
  	 
@@ -27,7 +30,13 @@ const int chipSelect = 4;
 
 void setup()
 {
+ // Open serial communications and wait for port to open:
   Serial.begin(9600);
+   while (!Serial) {
+    ; // wait for serial port to connect. Needed for Leonardo only
+  }
+
+
   Serial.print("Initializing SD card...");
   // make sure that the default chip select pin is set to
   // output, even if you don't use it:
diff --git a/libraries/SD/examples/Files/Files.ino b/libraries/SD/examples/Files/Files.ino
index 5ed9fea..a15b862 100644
--- a/libraries/SD/examples/Files/Files.ino
+++ b/libraries/SD/examples/Files/Files.ino
@@ -11,7 +11,7 @@
  
  created   Nov 2010
  by David A. Mellis
- updated 2 Dec 2010
+ modified 9 Apr 2012
  by Tom Igoe
  
  This example code is in the public domain.
@@ -23,7 +23,13 @@ File myFile;
 
 void setup()
 {
+ // Open serial communications and wait for port to open:
   Serial.begin(9600);
+   while (!Serial) {
+    ; // wait for serial port to connect. Needed for Leonardo only
+  }
+
+
   Serial.print("Initializing SD card...");
   // On the Ethernet Shield, CS is pin 4. It's set as an output by default.
   // Note that even if it's not used as the CS pin, the hardware SS pin 
diff --git a/libraries/SD/examples/ReadWrite/ReadWrite.ino b/libraries/SD/examples/ReadWrite/ReadWrite.ino
index 9957218..5805fc8 100644
--- a/libraries/SD/examples/ReadWrite/ReadWrite.ino
+++ b/libraries/SD/examples/ReadWrite/ReadWrite.ino
@@ -11,7 +11,7 @@
  
  created   Nov 2010
  by David A. Mellis
- updated 2 Dec 2010
+ modified 9 Apr 2012
  by Tom Igoe
  
  This example code is in the public domain.
@@ -24,7 +24,13 @@ File myFile;
 
 void setup()
 {
+ // Open serial communications and wait for port to open:
   Serial.begin(9600);
+   while (!Serial) {
+    ; // wait for serial port to connect. Needed for Leonardo only
+  }
+
+
   Serial.print("Initializing SD card...");
   // On the Ethernet Shield, CS is pin 4. It's set as an output by default.
   // Note that even if it's not used as the CS pin, the hardware SS pin 
diff --git a/libraries/SD/examples/listfiles/listfiles.ino b/libraries/SD/examples/listfiles/listfiles.ino
index b2435a2..876c3f8 100644
--- a/libraries/SD/examples/listfiles/listfiles.ino
+++ b/libraries/SD/examples/listfiles/listfiles.ino
@@ -11,7 +11,7 @@
  
  created   Nov 2010
  by David A. Mellis
- updated 2 Dec 2010
+ modified 9 Apr 2012
  by Tom Igoe
  
  This example code is in the public domain.
@@ -23,7 +23,13 @@ File root;
 
 void setup()
 {
+  // Open serial communications and wait for port to open:
   Serial.begin(9600);
+   while (!Serial) {
+    ; // wait for serial port to connect. Needed for Leonardo only
+  }
+
+
   Serial.print("Initializing SD card...");
   // On the Ethernet Shield, CS is pin 4. It's set as an output by default.
   // Note that even if it's not used as the CS pin, the hardware SS pin 
diff --git a/libraries/SoftwareSerial/examples/SoftwareSerialExample/SoftwareSerialExample.ino b/libraries/SoftwareSerial/examples/SoftwareSerialExample/SoftwareSerialExample.ino
index 615d2b3..69bcc01 100644
--- a/libraries/SoftwareSerial/examples/SoftwareSerialExample/SoftwareSerialExample.ino
+++ b/libraries/SoftwareSerial/examples/SoftwareSerialExample/SoftwareSerialExample.ino
@@ -9,6 +9,7 @@
  * TX is digital pin 3 (connect to RX of other device)
  
  created back in the mists of time
+ modified 9 Apr 2012
  by Tom Igoe
  based on Mikal Hart's example
  
@@ -21,7 +22,13 @@ SoftwareSerial mySerial(2, 3); // RX, TX
 
 void setup()  
 {
+ // Open serial communications and wait for port to open:
   Serial.begin(57600);
+   while (!Serial) {
+    ; // wait for serial port to connect. Needed for Leonardo only
+  }
+
+  
   Serial.println("Goodnight moon!");
 
   // set the data rate for the SoftwareSerial port
diff --git a/libraries/SoftwareSerial/examples/TwoPortReceive/TwoPortReceive.ino b/libraries/SoftwareSerial/examples/TwoPortReceive/TwoPortReceive.ino
index e870c6f..d9f8f45 100644
--- a/libraries/SoftwareSerial/examples/TwoPortReceive/TwoPortReceive.ino
+++ b/libraries/SoftwareSerial/examples/TwoPortReceive/TwoPortReceive.ino
@@ -17,6 +17,7 @@
  * Second serial device's TX attached to digital pin 4, RX to pin 5
  
  created 18 Apr. 2011
+ modified 9 Apr 2012
  by Tom Igoe
  based on Mikal Hart's twoPortRXExample
  
@@ -33,8 +34,12 @@ SoftwareSerial portTwo(4, 5);
 
 void setup()
 {
-  // Start the hardware serial port
+ // Open serial communications and wait for port to open:
   Serial.begin(9600);
+   while (!Serial) {
+    ; // wait for serial port to connect. Needed for Leonardo only
+  }
+
 
   // Start each software serial port
   portOne.begin(9600);
diff --git a/libraries/Stepper/examples/stepper_speedControl/stepper_speedControl.ino b/libraries/Stepper/examples/stepper_speedControl/stepper_speedControl.ino
index dbd0f7f..1a67a55 100644
--- a/libraries/Stepper/examples/stepper_speedControl/stepper_speedControl.ino
+++ b/libraries/Stepper/examples/stepper_speedControl/stepper_speedControl.ino
@@ -26,11 +26,10 @@ const int stepsPerRevolution = 200;  // change this to fit the number of steps p
 // initialize the stepper library on pins 8 through 11:
 Stepper myStepper(stepsPerRevolution, 8,9,10,11);            
 
-int stepCount = 0;         // number of steps the motor has taken
+int stepCount = 0;  // number of steps the motor has taken
 
 void setup() {
-  // initialize the serial port:
-  Serial.begin(9600);
+  // nothing to do inside the setup
 }
 
 void loop() {
diff --git a/platform.txt b/platform.txt
index c47cd8b..c665c20 100644
--- a/platform.txt
+++ b/platform.txt
@@ -6,12 +6,12 @@ name=Arduino
 # Default "compiler.path" is correct, change only if you want to overidde the initial value
 #compiler.path={ide.path}/tools/avr/bin/..
 compiler.c.cmd=avr-gcc
-compiler.c.flags=-c -g -Os -w -ffunction-sections -fdata-sections
+compiler.c.flags=-c -g -Os -w -ffunction-sections -fdata-sections -MMD
 compiler.c.elf.flags=-Os -Wl,--gc-sections
 compiler.c.elf.cmd=avr-gcc
 compiler.S.flags=-c -g -assembler-with-cpp
 compiler.cpp.cmd=avr-g++
-compiler.cpp.flags=-c -g -Os -w -fno-exceptions -ffunction-sections -fdata-sections
+compiler.cpp.flags=-c -g -Os -w -fno-exceptions -ffunction-sections -fdata-sections -MMD
 compiler.ar.cmd=avr-ar
 compiler.ar.flags=rcs
 compiler.objcopy.cmd=avr-objcopy
@@ -25,10 +25,10 @@ compiler.size.cmd=avr-size
 # --------------------
 
 ## Compile c files
-recipe.c.o.pattern={compiler.path}{compiler.c.cmd} {compiler.c.flags} -mmcu={build.mcu} -DF_CPU={build.f_cpu} -D{software}={runtime.ide.version} {includes} {source_file} -o {object_file}
+recipe.c.o.pattern={compiler.path}{compiler.c.cmd} {compiler.c.flags} -mmcu={build.mcu} -DF_CPU={build.f_cpu} -D{software}={runtime.ide.version} {build.extra_flags} {includes} {source_file} -o {object_file}
 
 ## Compile c++ files
-recipe.cpp.o.pattern={compiler.path}{compiler.cpp.cmd} {compiler.cpp.flags} -mmcu={build.mcu} -DF_CPU={build.f_cpu} -D{software}={runtime.ide.version} {includes} {source_file} -o {object_file}
+recipe.cpp.o.pattern={compiler.path}{compiler.cpp.cmd} {compiler.cpp.flags} -mmcu={build.mcu} -DF_CPU={build.f_cpu} -D{software}={runtime.ide.version} {build.extra_flags} {includes} {source_file} -o {object_file}
 
 ## Create archives
 recipe.ar.pattern={compiler.path}{compiler.ar.cmd} {compiler.ar.flags} {build.path}/{archive_file} {object_file}
diff --git a/variants/leonardo/pins_arduino.h b/variants/leonardo/pins_arduino.h
index 5a15146..9f770d6 100644
--- a/variants/leonardo/pins_arduino.h
+++ b/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,
diff --git a/variants/micro/pins_arduino.h b/variants/micro/pins_arduino.h
deleted file mode 100644
index c9f25eb..0000000
--- a/variants/micro/pins_arduino.h
+++ /dev/null
@@ -1,27 +0,0 @@
-/*
-  pins_arduino.h - Pin definition functions for Arduino
-  Part of Arduino - http://www.arduino.cc/
-
-  Copyright (c) 2007 David A. Mellis
-
-  This library is free software; you can redistribute it and/or
-  modify it under the terms of the GNU Lesser General Public
-  License as published by the Free Software Foundation; either
-  version 2.1 of the License, or (at your option) any later version.
-
-  This library is distributed in the hope that it will be useful,
-  but WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-  Lesser General Public License for more details.
-
-  You should have received a copy of the GNU Lesser General
-  Public License along with this library; if not, write to the
-  Free Software Foundation, Inc., 59 Temple Place, Suite 330,
-  Boston, MA  02111-1307  USA
-
-  $Id: wiring.h 249 2007-02-03 16:52:51Z mellis $
-*/
-
-#include "../leonardo/pins_arduino.h"
-#undef ARDUINO_MODEL_USB_PID
-#define ARDUINO_MODEL_USB_PID	0x0035
\ No newline at end of file