Arduino Uno Download Mac

Updating the Atmega8U2 and 16U2 on an Uno or Mega2560 using DFU

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The ATmega16U2 chip on your Arduino board acts as a bridge between the computer's USB port and the main processor's serial port. Previous versions of the Uno and Mega2560 had an Atmega8U2. It runs software called firmware (so named because you couldn't change it once it had been programmed in the chip) that can be updated through a special USB protocol called DFU (Device Firmware Update).

Here's how to update the firmware on your 16u2 in a few steps.

Check whether you need to update the firmware

Programming for Arduino is done through the Arduino programming language (based on Wiring) and the Arduino development environment (based on Processing). Arduino-based projects can either include only Arduino or Arduino and other device running with a compatible OS. E.g, Arduino paired with Echo Dot or Google Home for smart home control. Download the software. Download for Free. Arduino Simulator 1.8 macOS. The license key: 5FVKL-CMSM2-ZH9EX-UAFIX-AKRN9. Or this key: FLEAK-4VBAA-TDZ4E-A3LKC-FX9HR. This version is for mac computers, download the Windows version here. Download and install the Java JDK here. Download for free.

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:

  • Windows (before 7): locate the board in the Device Manager (it should be under Ports), right click on it and select 'Properties'; in the resulting dialog, click on 'driver details' in the 'Driver' tab ('Details' in Windows 7). In one of the properties, you should the VID, PID, and the revision number.
  • Mac OS X: run the System Profiler application (e.g. by selecting 'About This Mac' from the Apple menu and clicking the 'More Info..' button); go to the USB sheet and click on the item for the Arduino board. The firmware version is listed as 'version' (e.g. 0.01 for rev. 0001).

Download a DFU Programmer

This is the software that will update the code :

Windows: Download Atmel's flip programmer from here

Mac: Install MacPorts following these instructions: Once MacPorts is installed, in a Terminal window, type sudo port install dfu-programmer

NB: If you've never used sudo before, it will ask for your password. Use the password you login to your Mac with. sudo allows you to run commands as the administrator of the computer

Linux: from a command line type

sudo apt-get install dfu-programmer

or

sudo aptitude install dfu-programmer

depending on your distribution

Download updated firmware

The latest version is here

Choose the version that is suitable for your board, either arduino-usbserial/Arduino-usbserial-uno.hex or arduino-usbserial/Arduino-usbserial-mega.hex

The firmware is also located with the Arduino software in the /hardware/arduino/firmwares/arduino-usbserial folder. On OSX, right-click or command-click on the Arduino application and select 'show package contents' to find this folder.

If your board is Arduino UNO R1

You'll need to solder a 10k resistor (Brown-Black-Orange) at the back of your board in the same location as this picture.

Connect the Arduino to your computer with a USB cable

Just like you do whenever you're programming it.

Reset the 8u2 or 16u2

To do this, briefly bridge the reset pin with the ground. The pins are located near the USB connector, as shown in this picture. Teamviewer force remote to boot in recovery mode. Connect them briefly with a piece of wire.

To verify you have reset the 8u2 or 16u2 chip: In the Arduino programming environment, check the list of serial ports. The serial port for your board should no longer show up.

Program the chip

Windows: use flip to upload the hex file to your board

Mac & Linux: from a terminal window, change directories to get into the folder with the firmware. If you saved the firmware in your downloads folder on OSX, then you might type

cd Downloads/

Once there, type:

sudo dfu-programmer atmega16u2 erase

When this command is done and you get a command prompt again, type

sudo dfu-programmer atmega16u2 flash Arduino-usbserial-uno.hex

Finally, type

sudo dfu-programmer atmega16u2 reset

Note

If your board has an atmega8u2 type atmega8u2 instead of atmega16u2 in the command lines above.

Unplug your board and plug it back in

Your board should be ready and up to date. You can check this by looking in the serial port menu of the Arduino software. Your port should re-appear.

Using other firmware

The 8u2 and 16u2's flexibility allows for other firmware so your board can appear as a different USB device (MIDI controller, HID, etc.). See the tutorials below for additional information.

  • UnoJoy : Turn you Arduino Uno into a PS3 compatible USB joystick

Arduino IDE

The open-source Arduino Software (IDE) makes it easy to write code and upload it to the board. It runs on Windows, Mac OS X, and Linux. The environment is written in Java and based on Processing and other open-source software.

This software can be used with any Arduino board.
Refer to the Getting Started page for Installation instructions.

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