You can also use a 2nd Arduino to flash the bootloader. For example if you can't access the first Arduino for some reason. We are just uploading the to another Arduino and connect the wires a bit different. You can use any kind of Arduino Leonardo/Micro/Mega/Uno/Nano etc for this operation. Prepare your Arduino First remove all hardware/wires/usb-cable from your Arduino to ensure nothing is messing up the upload. Never change wires when the devices are powered! Upload the installation sketch • Connect your Arduino (that acts as uploader) to your PC • Select the Arduino board that acts as uploader (do not select 16u2).

• Open the installation sketch • Edit the Settings if needed (for Uno, Mega, 8u2 or 32u2 board for example). • Upload the installation sketch to your Arduino (Ctrl + U). • Wait until it says 'Done uploading'. This may take a while. Wire up your Arduino Unplug both Arduinos from USB. Never change wires when the devices are powered!

Starter Kit Learning Arduino Menu Skip. (on right are labels from Arduino UNO. You can always burn bootloader in chip in other Arduino board so You can.

Connect all wires from the 2nd Arduinos main MCU to the 16u2. You also need to connect 5V-5V and GND-GND to power the board. Unplug the USB cable of the Arduino you are flashing. In this case you do not need the capacitor which we use in the standalone version.

Pin connections: 328/2560 - 16u2 GND - GND 5V - 5V MOSI - MOSI MISO - MISO SCK - SCK PIN 10 - 16u2 RESET 4. Burn the bootloader Once the installation sketch is uploaded to your main MCU you are able to burn the bootloader to your 16u2. It will automatically try to flash the bootloader once the sketch is uploaded and the Arduino is powered.

You have 10 seconds (after plugging in) to enter the Serial Monitor to see some debug output if wanted. Control via Serial: • Open the Serial port monitor at baud 115200. • No capacitor needed, ignore that. • Read the instructions and wait.

• The 2nd Arduino will flash the new bootloader. • Wait until the Serial Monitor says programming finished. • You may close the Serial monitor now. For more help have a look. This no longer looks that complicated.

You dont need to input anything, just wait and look at the output. Check bootloader installation Now your Arduino should be flashed with the new bootloader. To check your HoodLoader2 installation. How To Update Serial Number In Bios Lenovo G50. If its not correctly installed read the instructions carefully and try again.

Overview Do you have a bricked Arduino that won’t accept code anymore? Or, maybe you wrote your own firmware and would like to upload it to your Arduino? Or, maybe you just want to learn more about the inner-workings of Arduino, AVR, and microcontrollers in general. Well, you’re in luck!

This tutorial will teach you what a bootloader is, why you would need to install/reinstall it, and go over the process of doing so. Suggested Reading You may want to check out these tutorials before continuing down the bootloader path.

What is a Bootloader? Are great little ICs, but they can be a bit tricky to program. You need a special programmer and some fancy.hex files, and its not very beginner friendly. The Arduino has largely done away with these issues. They’ve put a.hex file on their AVR chips that allows you to program the board over the, meaning all you need to program your Arduino is a USB cable. The bootloader is basically a.hex file that runs when you turn on the board.

It is very similar to the that runs on your PC. It does two things. First, it looks around to see if the computer is trying to program it. If it is, it grabs the program from the computer and uploads it into the ICs memory (in a specific location so as not to overwrite the bootloader). That is why when you try to upload code, the Arduino IDE resets the chip. This basically turns the IC off and back on again so the bootloader can start running again. If the computer isn’t trying to upload code, it tells the chip to run the code that’s already stored in memory.

Once it locates and runs your program, the Arduino continuously loops through the program and does so as long as the board has power. Why Install a Bootloader If you are building your own Arduino, or need to replace the IC, you will need to install the bootloader. You may also have a bad bootloader (although this is very rare) and need to reinstall the bootloader. There are also cases where you’ve put your board in a weird setting and reinstalling the bootloader and getting it back to factory settings is the easiest way to fix it. We’ve seen boards where people have turned off the serial port meaning that there is no way to upload code to the board, while there may be other ways to fix this, reinstalling the bootloader is probably the quickest and easiest. Like I said, having a bad bootloader is actually very very rare.

If you have a new board that isn’t accepting code 99.9% of the time its not the bootloader, but for the 1% of the time it is, this guide will help you fix that problem. Selecting a Programmer We are going to talk about two different types of programmers you can use to install or reinstall bootloaders. Option 1: Dedicated Programmers For a quick easy programmer we recommend looking into the (Windows only). Or, you can use the official ( Now discontinued) or the.

AVR MKII JTAG ICE3 The AVR Pocket Programmer or most cheaper options will work just fine for most applications, but they may have problems with some boards, specifically ones with lots of memory like the ATMega2560 based boards. Option 2: Using the Arduino as a Programmer The other option is grabbing an Arduino Uno (or Duemilanove). If you go into the Arduino IDE you will see an example sketch called ‘Arduino as ISP.’ If you upload this code to your Arduino, it will basically act as an AVR programmer. This isn’t really recommended for production of boards, or boards with lots of memory, but, in a pinch, it works pretty well.

Also as of this writing the code only works on ATmega328 boards. Maybe one day it will work on the Leonardo or Due, but not yet.

Connecting the Programmer In-Circuit Serial Programming (ICSP) It’s very uncommon to program ICs before they are soldered onto a PCB. Instead, most microcontrollers have what’s called an in-system programming () header. Particularly, some IC manufacturers, such as Atmel and Microchip, have a specialized ISP method for programming their ICs. This is referred to as in-circuit serial programming () Most Arduino and Arduino compatible boards will have a 2x3 pin ICSP header on them. Some may even have more than one depending on how many ICs live on the PCB. It breaks out three of the pins (MISO, MOSI, SCK), and power, ground, and reset.

These are the pins you’ll need to connect your programmer to in order to reflash the firmware on your board. Here we have the Arduino Uno R3. It has two ICSP headers: one for the ATmega16U2 and one for the ATmega328.

To reflash the bootloader on this board, you would use just the ICSP header for the ATmega328. On some smaller boards you may not see this connector, but the pins should be broken out elsewhere. Whether you’re using an, the ISP pins should be accessible in one form or another. Some boards might only have test points for the ISP header.

If this is the case, you may want to consider getting an. This kit allows you to temporarily make a good connection with test test points in order to reprogram your IC. ISP Pogo Adapter Kit Fully Assembled.

You can connect any of the programmers we mentioned in the previous section to this board. If you are having trouble finding the ICSP pins on your particular Arduino board, you can consult for detailed pinouts of most Arduino related ICs and then some. Once you have located the six ICSP pins on your board, it’s time to hook up your programmer to the board.

You can use a to connect the two, or, if you don’t have a cable, you can just use some. If you are using a programmer such as the MKII or the Pocket Programmer, your setup should look something like this: Click for larger image. Or, if you’re using the Arduino as your programmer, it should look like this: Click for larger image. Here’s a table to help clarify which connections go where. Arduino as ISP AVR Programmer ISP Header ATmega328 ATmega32U4 Vcc/5V 5V Pin 2 Vcc Vcc GND GND Pin 6 GND GND MOSI/D11 MOSI Pin 4 D11 D16 MISO/D12 MISO Pin 1 D12 D14 SCK/D13 SCK Pin 3 D13 D15 D10 Reset Pin 5 Reset Reset. Uploading Code - Easy Way The easy way to upload the bootloader involves using the Arduino IDE.

Open your IDE select the board you want to program. Then select the programmer (if you are using the Arduino as ISP you will also need to select the COM port that the Arduino as ISP is connected to). Then select BurnBootloader. This will take the board you selected and look up the associated bootloader in the board.txt file. Then, it will find the bootloader in the bootloader folder and install it.

This only works if the board is installed correctly in the IDE and you have the correct bootloader. If for some reason you want to use a bootloader that isn’t installed in the Arduino IDE, visit the nest section. However, it’s probably easier to just install the bootloader from the Arduino IDE. For those who are curious about settings such as fuse bits, have no fear.

Arduino takes care of all the messy details for you when you burn bootloaders through it. Uploading Code - Hard Way The hard way is for those people who want to use the command line.

This method may be more preferable if you are modifying and recompiling and don’t want to have to keep updating the IDE, but otherwise its pretty unnecessary. Again you will need to get the programmer, and hook everything up.

In this example we are using avrdude on Windows. There are two steps to this process. The first step involves setting the fusebits. Fusebits are the part of the AVR chip that determine things like whether you are using an external crystal or whether you want brown out detection. The commands listed below are for the Arduino Uno using an ATMega328, they will probably work on some other similar boards such as the Duemilanove, but make sure you know what you are doing before playing with fusebits (NOTE: these fusebits will not work on a 3.3V/8MHz board). All the required fuse bits are listed in the boards.txt file for different boards, but again, if you have a boards.txt file installed then just use the Easy Way.

22 January 2016 After programming an Arduino MEGA board using Atmel Studio, the bootloader in the Arduino will be overwritten by the program loaded to the Arduino. The instructions that follow show how to restore the bootloader of an Arduino MEGA 2560 using an Atmel AVRISP mkII or AVR Dragon and Atmel Studio.

When the bootloader is restored, the Arduino will be able to be programmed using the Arduino IDE software via the USB port. Locate the Arduino MEGA Bootloader File Locate the bootloader hexadecimal or hex file for the Arduino MEGA 2560 which is included with the Arduino IDE software. After downloading the Arduino IDE software and unzipping it, open the Arduino IDE folder which is in the form arduino- and locate the bootloader file called stk500boot_v2_mega2560.hex as described below. For example, in Arduino IDE version 1.6.7, the hex file is found in arduino-1.6.7 hardware arduino avr bootloaders stk500v2 as shown in the image below. This is just to show the location of the file – we will need to navigate to this file from within Atmel Studio. Programming the Bootloader to the Arduino MEGA 2560 4.

Test the Bootloader using Arduino IDE After loading the bootloader to the Arduino MEGA 2560, test the Arduino to make sure that the correct bootloader was loaded and that the board works with the Arduino IDE USB programming. If you broke the track between the two RESET-EN pads to use the board with the debugger, first solder the pads together before continuing. Unplug the USB cable from the Arduino board to power it down and then unplug the programmer from the Arduino board ICSP header. After a few seconds, plug the Arduino MEGA 2560 board back into the PC using a USB cable. Open the Arduino IDE and select the correct board and port under Tools → Board and Tools → Port. Also make sure that ATmega2560 is selected under Tools → Processor. Open the Blink example sketch from the top menu under File → Examples → 01.Basics → Blink.

Load the Blink sketch to the Arduino MEGA 2560 from the Arduino IDE using the Upload button on the Arduino IDE toolbar.