Latest commit 1c1ecb6 Aug 26, 2015 1 @cmaglie cmaglie committed with Federico Fissore Added support to Genuino boards (drivers, boards.txt entries, bootloa…


Arduino Uno and Mega 2560 Firmwares for the ATmega8U2

This directory contains the firmwares used on the ATmega8U2 on the Arduino
Uno and Arduino Mega 2560.  The arduino-usbdfu directory contains the DFU
bootloader on the 8U2; the arduino-usbserial directory contains the actual
usb to serial firmware.  Both should be compiled against LUFA 100807.  The
two .hex files in this directory combine the dfu and serial firmwares into
a single file to burn onto the 8U2.  

To burn (Uno):
avrdude -p at90usb82 -F -P usb -c avrispmkii -U flash:w:UNO-dfu_and_usbserial_combined.hex -U lfuse:w:0xFF:m -U hfuse:w:0xD9:m -U efuse:w:0xF4:m -U lock:w:0x0F:m

To burn (Mega 2560):
avrdude -p at90usb82 -F -P usb -c avrispmkii -U flash:w:MEGA-dfu_and_usbserial_combined.hex -U lfuse:w:0xFF:m -U hfuse:w:0xD9:m -U efuse:w:0xF4:m -U lock:w:0x0F:m

Note on USB Vendor IDs (VID) and Product IDs (PID): The arduino-usbdfu
project uses Atmel's VID and MCU-specific PIDs to maintain compatibility
with their FLIP software.  The source code to the arduino-usbserial
project includes Atmel's VID and a PID donated by them to LUFA.  This
PID is used in LUFA's USBtoSerial project, which forms the basis for
arduino-usbserial.  According to the LUFA documentation, this VID/PID
combination is:

 "For use in testing of LUFA powered devices during development only,
 by non-commercial entities. All devices must accept collisions on this
 VID/PID range (from other in-development LUFA devices) to be resolved
 by using a unique release number in the Device Descriptor. No devices
 using this VID/PID combination may be released to the general public."

The production version of the arduino-usbserial firmware uses the
Arduino VID.  This is only for use with official Arduino hardware and
should not be used on other products.