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Questions tagged [bootloader]

Refers to the code burned on the Arduino flash memory that runs every time the board is powered up. It starts the execution of user-loaded programs and allows uploading sketches from a PC through the USB connection. This tag should be used for questions about modifying, changing, uploading the default bootloader.

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Atmega328P burn bootloader with FTDI

I need your help. I am using Arduino ProMini in my project. In project board there is Atmega328P which doesn't have Arduino bootloader, and Atmega328P RXD, TXD pins are connected to FTDI Basic(...
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3answers
129 views

Does ATmega328 on Uno need to be burned?

I'm new to the Arduino world so please bear with me. I'm not sure whether the ATmega328 bootloader needs to be burned. What I'm reading is all that needs to be done is plug the board into the computer ...
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1answer
111 views

Best practise when dynamically updating sketch

I am currently working on a project that uses an Arduino Mega 2560 board along with the Arduino GSM shield to connect to the internet and send/receive SMS messages. As part of my project, I want to ...
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2answers
1k views

Problem in Uploading a Bootloader to Atmega8A

I am getting an error while Uploading the Bootloader to Atmega8A I am selecting.. Board -> Arduino NG and Older Processor -> Atmega8A Programmer -> USBasp and sketch code is ...
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1answer
53 views

Arduino Bootloader availability

When I look at arduino and arduino-like boards featuring ATMEGA328 chip, I see that they either use a micro controller or a FTDI chip to program the ATMEGA through Arduino board pin 0 and 1. This ...
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3answers
922 views

Can I place bootloader directly onto Atmega2560 and have USB?

I am working on a prototype device which I am now on my 2nd board iteration and moving away from it being a shield and wired to an arduino mega2560 board. I have used the freely available Arduino ...
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1answer
1k views

Difference in bootloader of ATmega with 16MHz external crystal and 8MHz external crystal

I have used your bootloader for ATmega2560-16AU with 16MHz external crystal and it works like a wonder. In my new project I have a 3V power supply. Therefore, I am planning to use a low frequency ...
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1answer
674 views

Arduino Mega 2560 bootloader delay

I need to make my program run immediately on a reset or power up. However, the bootloader delays program startup by around 2.5 seconds. How can I get over this? Is there a way to turn off the ...
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1answer
6k views

Programming an ATMEGA2560 using FTDI

I want to know how exactly do I program (upload arduino sketches) an ATMEGA2560 which is boot loaded with an Arduino Bootloader using a FTDI programmer and an Arduino IDE, is there any capacitors/...
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2answers
134 views

Standalone Arduino

I have an Arduino Uno and I am using arduino 1.0.5 IDE. I followed he procedures for bootloading an atmega328P-PU on a breadboard using an Arduino Uno from the link: https://www.arduino.cc/en/...
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1answer
3k views

What happens when code is uploaded using the bootloader?

When I upload a new sketch to my Arduino Uno using the Optiboot bootloader, what really happens? What is sent to the Arduino? How does it respond? What does "not in sync mean"? What is "in sync" ...
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222 views

Uploading to atmega328 over serial with arduino bootloader running at 2MHz

I want to run an atmega328 on a breadboard at 2MHz and upload to it via the serial pins (pins 2 and 3). So I am setting the clock divide by 8 fuse bit to enable this, meaning the atmega runs at 2MHz ...
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1answer
303 views

Why when I press the reset button

Why when I press the reset button it takes 2 second before I see my sketch start? The model of Arduino is UNO, and the text in serial communication.
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2answers
382 views

How to reset Arduino Uno over BLE just like over USB?

I'm working on wireless upload to Arduino and i've succeed for Mega2560. But when trying to upload to Uno it does not wait for upload commands. I'm doing reset using GPIO and HM-10 BLE module wired ...
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1answer
665 views

Burning Arduino Leonardo Bootloader to ATmega32U4 with 8MHz internal clock [duplicate]

Burning question: So, I'm trying to burn the Arduino Leo bootloader onto a ATmega32U4 that's on 3.3V and the internal 8MHz clock. Do I have to modify and rebuild the bootloader to set the fuses ...
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1answer
2k views

Burning Arduino Leonardo Bootloader to ATmega32U4 with 8MHz internal clock

Burning question: So, I'm trying to burn the Arduino Leo bootloader onto a ATmega32U4 that's on 3.3V and the internal 8MHz clock. Do I have to modify and rebuild the bootloader to set the fuses ...
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0answers
43 views

Is serial modem routine written on the Arduino Leonardo bootloader?

I'm starting with Leonardo and I'm a bit confuse about the serial modem function. As you know on boot the Leonardo for the first 8 seconds wait for a program on the USB port and then it goes in serial ...
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1answer
1k views

What changed in the new Due?

I recently purchased a batch of Due boards and find that they are cosmetically different. After attaching the Atmel-ICE and reading the firmware from both processors, I find that the firmware is ...
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3answers
73 views

Reversed Input Voltage Arduino Mega timeout communication with programmer error

On the barrel connector I accidentally reversed the input voltage to an Arduino Mega. The center post received ground while the outer connection received +12DVC, basically I have the Arduino -12VDC. I ...
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1answer
174 views

Will the Uno bootloader work in the Duemilanove?

I had an old duemilanove lying around (Which was not working because i accidentially busted the atmega) and I recently bought some atmegas pre-flashed with the UNO bootloader. So I tried to put one of ...
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0answers
458 views

Leonardo sketch and bootloader hex file combination

Can I combine Leonardo sketch hex file with the Leonardo bootloader hex file? I would like to program blank Atmega32U4 with one shot.
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1answer
360 views

Arduino communication with ROS via UART

I am trying to program an Arduino Mega(Crius) from a Minnowboard Max A2 via an UART (Hardware Flow Control Off) interface. I can successfully communicate with the ROS (robot Operating System) on the ...
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2answers
822 views

How to test Arduino board?

A little history: I have two Arduino Uno and I couldn't program them by IDE, I got these errors: avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 2 of 10: not in ...
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0answers
99 views

Arduino not responding while trying to flash over BLE

I'm working on wireless uploader for Arduino from iOS devices. I'm using HM-10 BLE module which seems to work ok. PIO 2 is used as DTR for resetting (see A [0x41] T [0x54] + [0x2B] P [0x50] I [0x49] O ...
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1answer
637 views

Why the bootloader burn on ATmega328 rather than Atmega16U2 in Arduino Uno

I have been researching about the reason why we have a second MCU in arduino UNO for a while now. finally i understood that its been use as USB to serial converter. the question that really bug me ...
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1answer
204 views

Arduino Mega2560 clone responding slowly

I am using an Arduino Mega2560. Using Arduino Mega as ISP to burn sketch, I had loaded the bootloader from Arduino IDE. I uploaded the blink LED code to the Mega. But the LED is responding slowly. ...
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2answers
3k views

Can't burn arduino bootloader to atmega8a with usbasp

I want to burn the arduino bootloader with arduino IDE, but I cant get it done. And here is my circuit: I have marked the way I connect the ISP port and the chip. I choose Arduino NG/older as the ...
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1answer
191 views

Custom Bootloader on Atmega328p - PU - 28 pin DIP

I am experimenting with low-power wireless arduino modules. For that, I needed 3V powered arduino so that I can do away with voltage regulators which eat up a lot of battery juice. I am using 28 pin ...
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1answer
14k views

Cannot bootload again after changing the board?

We are so tired and would like to get help with this. We are trying to bootload using the arduino Uno. We have an atmega 328p smd , that we are trying to bootload. We have connected all the right ...
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0answers
35 views

Having trouble bootloading my Two-Up printer

I am following these instructions to set up my Two-Up 3D printer, and I have no problems all the way up until step 18. The board uses the arduino IDE to burn the bootloader, which is why I am posting ...
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2answers
2k views

Uploading over Bluetooth Low Energy - bootloader not responding

I'm working on sketches uploading over BLE. I had to write my own uploader (looking at avrdude sources with one eye) so i can change uploading behaviour as needed and it's working over USB just ...
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0answers
524 views

Will we be able to burn arduino zero pro's bootloader?

As arduino.org states, the bootloader is pre-burnt by Atmel at the factory. I'd like to know if it will be possible for us to buy "raw" ICs and burn them at home for our own boards, as we do with the ...
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2answers
586 views

Problem Bootloading AVR328P-PU

I executed the following steps in order to burn a bootloader into an AVR328P-PU chip I acquired on ebay. I have set up AVR328P-PU on a breadboard as described here: http://arduino.cc/en/main/...
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1answer
100 views

Reprogram Arduino Mega 2560 using Duemilanove?

Experiencing that Mega 2560 uploading problem. Tried updating the IDE, worked for a while but symptoms went back. Now i want to reprogram that chip. I'm asking this question cuz hardware ain't free ...
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2answers
2k views

Burning a Uno bootloader into a Nano

I bought some cheap Arduino Nanos from ebay, but the watchdog does not work in them. So I removed their old bootloader and burnt a new Nano bootloader from the Arduino IDE. Same problem, the watchdog ...
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3answers
547 views

Can i use arduino code, without using arduino board but just using MCU included

I am developing a product, and to ease my job i am planning to use MCU inside the arduino with the library of Arduino. Since all the registers are already defined inside the library, and all required ...
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4answers
4k views

How to remove Adafruit Pro Trinket bootloader flashing startup sequence

From what I understand, the Pro Trinket has "Optiboot" which allows it to detect which boot loader you are trying to use, one for USB and one for FTDI. When it's in this "bootloader state" the red LED ...
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2answers
161 views

How do I replace a burnt atmega328 with a new atmega328(bootloaded) in arduino?

I have an arduino UNO with atmega 328 whose microcontroller got burnt. I bought a new atmega328. I have another working arduino with atmega8. I followed the instructions in http://arduino.cc/en/...
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3answers
757 views

Can the Sparkfun AVR pocket programmer bootload/program a 3.3 V ATmega328p

The product in question - https://www.sparkfun.com/products/9825 - operating at 5 V (and can also supply it to the device being programmed). I need to program the bootloader onto a 3.3 V ATmega328p ...
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1answer
3k views

avrdude: stk500v2_ReceiveMessage(): timeout with ADDAC VCC

I am getting the above error message uploading the ADDAC VCC, and the only thing that's changed I think is the patch is bigger. Is there a fix for this or will I have to send it back? Hope my ...
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2answers
975 views

Using the ATMega328, from an Arduino UNO in a Standalone configuration, and bootloader - I am really lost

I am really despaired. I have spent a full day to understand this, and it seems that I still don't. I have an Arduino UNO, with an ATMega328, for which I wrote a great piece of code. Later, I have ...
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1answer
712 views

Flash “sketch” hex over ISP, without bootloader - possible?

I'm wondering if it's possible to flash the arduino sketch into a AVR, without using a bootloader - over ISP. I'd use the BSD programmer, which is basically parallel port with some resistors. Let's ...
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3answers
4k views

Burn Arduino Bootloader - Atmega8L

I am making an RGB LED project right now using the Arduino UNO board. At this point everything is working fine so I would like to transfer this onto a small microcontroller circuit to be put inside ...
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1answer
2k views

Unable to load sketch: stk500_getparm(): (a) protocol error, expect=0x14, resp=0x41

I've stumbled upon what I've later found it's quite common error, but there seems not to be simple troubleshooting way and solution (people often try various things, sometimes they succeed, sometimes ...
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1answer
417 views

USART RX Interrupt on an ARDUINO PRO MINI containing factory bootloader

Is it possible to use RXC Interrupt vector with the factory programmed bootloader still existing in the arduino pro mini? I've written a simple echo program using RXC interrupt vector, the program ...
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2answers
5k views

Garbage value Serial Monitor

I am building my own arduino.Here is my code Below. I found code working for Digital Ios like blink example ; analog reading, Problem i am facing in Serial Monitor.Whenever i open Serial monitor i get ...
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1answer
1k views

ATmega32u4 bootloader

Hey all this would be my first encounter needing to burn the Arduino IDE bootloader onto a blank ATMega32u4 that I bought from Digikey. What all do I need to buy in order to program the bootloader ...
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2answers
954 views

Homebrew Arduino using ATMEGA328P, ISP or ICSP?

I plan on creating a homebrew Arduino breakout board using the ATMEGA328P smd version. I'm geeting confused by the wealth of information out there as to whether I should be using ICSP or ISP to ...
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4answers
10k views

ATtiny85. How do I burn a bootloader? What is the process?

I want to use all six I/O pins of an ATtiny85, that means also using the reset pin as an I/O pin, however, I found out that if I disable the RESET pin, I can no longer program the ATtiny using an ISP ...
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1answer
103 views

Arduino mini requires uploading on every power up?

My Arduino mini is experiencing some really strange problem. I'm using the BlinkWithoutDelay example sketch for testing: const int ledPin = 13; int ledState = LOW; // ledState used to ...