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LUFA Library - Arduino USB Firmware

Atmega 16u2 firmware upload

  1. Install package dfu-programmer
sudo apt-get install dfu-programmer

  1. Reset the Atmega 16u2 to enter programming mode by shorting RESET and GND pins (pins 5 and 6).

  2. Program the Arduino board

sudo dfu-programmer at90usb82 erase
sudo dfu-programmer at90usb82 flash UNO-dfu_and_usbserial_combined.hex --suppress-bootloader-mem
sudo dfu-programmer at90usb82 reset