Here's how to update the firmware on your 16u2 in a few steps. Check Whether You Need to Update the Firmware The Arduino Uno and Mega 2560 have been shipping with the updated version of the ATmega16u2 firmware. To check which version of the firmware is on your board, connect it to your computer and follow the directions for your operating system: Arduino ATmega16U2 USB chip firmware Sources hardware/arduino/avr/firmwares/atmegaxxu2 at https://github.com/arduino/Arduino firmware/atmega16u2 at https://github.com/Pinoccio/hardware-pinoccio Default settings The makefile flags set for Uno Rev 3
How to Restore the Arduino UNO R3 ATmega16U2 Firmware Using the Arduino IDE Arduino, Firmware
In this tutorial you will update the ATmega16U2 firmware using an Arduino UNO or Mega as an AVR-ISP (in-system programmer). Instructions To use your Arduino board to burn a bootloader onto an AVR, you need to follow a few simple steps. 1. Open the ArduinoISP sketch (in Examples) in the Arduino IDE. 2. Flash the firmware. dfu-programmer
flash Disconnect and reconnect the board to your computer. Using FLIP (Windows) Connect the board to your computer. Set the board to DFU mode. Open Device Manager. If you have a need to re-flash the ATmega16U2 chip with the stock firmware to restore the Arduino UNO back to normal, this is often done on the command line using avrdude or dfu-programmer, or with the Windows program Flip. The easier way for me is to just use the Arduino IDE. The 16U2 firmware is a part of Arduino SW. Upload process is same as for uploading the bootloader. pert October 22, 2018, 9:58pm 3 There should be no difference between setting up the ATmega16U2 for Uno or Mega. Note that when you do a Sketch > Upload Using Programmer, the bootloader is erased.
Refreshing Arduino Driver IC ATmega16U2 by DFU Mode and Flip Atmel Software Electronics Garage
The ATmega16U2 firmware source code is available . The ATmega16U2 is loaded with a DFU bootloader, which can be activated by connecting the solder jumper on the back of the board and then resetting the 16U2. You can then use Atmel's FLIP software (Windows) or the DFU programmer (Mac OS X and Linux) to load a new firmware. Or you can use the ISP. Install and execute ATMEL FLIP software. Select the microcontroller. Click "Device">"Select…", or use the shortcut key +S. Select the microcontroller "ATMEGA16U2". Select the communication. Click "Settings">"Communication">"USB", or use the shortcut key +U. A dialogue box may appear. Then click open. Arduino from Scratch Part 8 - ATMEGA16U2 Subsystem In Part 7, we pulled together all the parts necessary to connect our USB Type B socket to a microcontroller. Now we introduce that micro, the Atmel ATMEGA16U2. {"payload":{"allShortcutsEnabled":false,"fileTree":{"firmwares/atmegaxxu2/arduino-usbserial":{"items":[{"name":"Board","path":"firmwares/atmegaxxu2/arduino-usbserial. 
Programmer Not Responding Arduino Make Sure That Firmware Updater UnBrick.ID
1 Overview 2 Preparations 3 Wiring 4 Start burning the firmware 4.1 Step 1: Find the two files avrdude.exe and avrdude.conf 4.2 Step 2: Copy them to path of Arduino software 4.3 Step 3: Type in commands 4.4 Step 4:burn the firmware 5 Test the burning Overview 2 Answers. The firmware you are looking for is in the Arduino installation folder. I just find where they are. Under the arduino installation folder : \hardware\arduino\firmwares\. In my case for the arduino uno R3 : \hardware\arduino\firmwares\atmegaxxu2\arduino-usbserial\Arduino-usbserial-atmega16u2-Uno-Rev3.hex.
The ATmega16u2 chip on Arduino UNO is programmed as just such a device. A quick search, and we have the source code for its firmware. As I expected, it uses LUFA to do the USB work, and hardware serial to do the UART work. Pretty straightforward stuff, two ring buffers are used to keep the data before it is sent on its way, one for each direction. The Arduino Uno and Mega 2560 have been shipping with to upgraded version of the ATmega16u2 firmware. To check where version is to firmware the on your board, connect it to your computer furthermore follows the directions for your operating your: 
GitHub jj1bdx/arduinoatmega16u2 Arduino ATmega16U2 USB chip firmware for DFU and USB Serial
In the folder \hardware\arduino\avr\firmwares\atmegaxxu2 you will find a lot of hex files (e.g. Arduino-COMBINED-dfu-usbserial-atmega16u2-Uno-Rev3.hex) I checked on my portable installation of arduino 1.8.5, but it should be there also for installed versions. Share. To setup the project and upload the Arduino usbserial application firmware to an ATmega16U2 using the Arduino USB DFU bootloader: \n \n; unpack the source into LUFA's Projects directory \n; set ARDUINO_MODEL_PID in the makefile as appropriate \n; do make clean; make \n;
