Tagged Questions

6
votes
2answers
113 views

ATTiny85 not working after burning bootloader

I am having a problem with my ATTiny85. I should mention I use Arduino as an ISP to program it. My ATTiny worked fine until I decided that I need to step up the clock speed from 1MHz to 20MHz so I ...
1
vote
1answer
9 views

Are there any disadvantages to look out for when using Optiboot?

Optiboot appears to be superior to the official Arduino bootloader in just about every way. Despite this, is there anything I need to look out for when using this bootloader? Common pitfalls? ...
9
votes
2answers
113 views

Reduce the size of the Arduino bootloader?

Is there any way of reducing the size of the preloaded Arduino bootloader, to save some bytes for the program?
0
votes
1answer
63 views

USB bootloader for the arduino DUE

I recently bought an Arduino DUE. I was going through the technical details and realized that the DUE acts a a virtual USB device (COM port). I was wondering whether I could upgrade the Board Support ...
4
votes
2answers
39 views

Can I write a bootloader to Atmega using serial port

There is a really grand price difference between an empty Atmega328 chip and the one with the Arduino bootloader installed. In my country, this difference is 1:3. This means that uploading bootloader ...
14
votes
2answers
24 views

How can I use my SMD Arduino to program a separate DIP ATmega328?

I have an arduino with a surface mounted (SMD) microcontroller: I know how to use a DIP arduino as a programmer for a DIP ATmega328. It's easy --you just pop your microcontroller in the holder. ...
2
votes
2answers
165 views

ArduinoISP fails with Atmega368, 168 - Device signature = 0x000000

So, apparantly this is a common error, which many people have fixed many different ways, none of which have worked for me. I have two different Arduinos - an NG and an Uno, with an Atmega168 and 328 ...
-3
votes
1answer
207 views

Programming 3.3v ATMega328 running at 16MHz [closed]

I know that running the 328 with 3.3v at 16MHz is "overclocking" it and slightly out of spec. Because of limited board space i'd like to do this though as all other components are 3.3v. I need the ...
3
votes
2answers
198 views

When to use an Arduino bootloader

I need to make a robot within a month for a competition. I used to use Arduinos for my projects, but graduated to just flashing code with avrdude to standalone AVR microcontrollers. I was thinking, ...
0
votes
2answers
939 views

How to burn Arduino Uno bootloader to ATMega328P via CP2102 USB-2-UART?

Following the The Shrimp I've acquired CP2102 USB to UART converter. I already have ATMega328P but without burned bootloader. I want to burn Arduino UNO bootloader to it using the CP2102 converter ...
4
votes
1answer
197 views

“Faster” Arduino bootloader

The Arduino bootloader has a wait-time to facilitate "sketch" (code) uploading; this causes a delay of a couple of seconds before the start of the main code. I would like to modify the bootloader ...
3
votes
1answer
2k views

Arduino's “Upload Using Programmer” for ATmega328 (not ATmega328P)

I am using the the Atmega328 (not the Atmega328P that is standard with Arduino) on a breadboard version of the Arduino. I am able to get the bootloader on the Atmega328 using these instructions. In ...
1
vote
0answers
521 views

Atmega328 reset pin not working after re-burning Arduino boot loader?

For a bit of background you might want to read atmega328 with optiboot not compatible with Arduino? But I will summarize anyway. I have some Atmega328 chips that shipped with the optiboot ...
4
votes
2answers
1k views

bitbang atmega328 with arduino bootloader using avrdude

I have an Arduino UNO dev board with a blank atmega328 chip (no arduino bootloader, the chip that came with the unit is soldered in a separate standalone project so that I can use the arduino board ...
3
votes
5answers
20k views

How to burn atmega328 chip via Arduino UNO as ISP?

I've an atmega328 chip (without bootloader), and I want to burn it with my Arduino UNO as ISP, so I can have a spare atmega 328 with UNO bootloader. I'm trying to follow the instruction in ...
2
votes
2answers
6k views

How to burn arduino mega 2560 bootloader?

I have my new Arduino Mega 2560 and I might have overwritten the bootloader when uploading another program through AVR studio. I really need advice and instruction of how to burn it using AVR Studio ...
4
votes
3answers
951 views

Arduino Bootloader Follow On

Two parts: Is it possible to write an Arduino Bootloader for a Tiny AVR? Is it worthwhile to write a Arduino Bootloader for an Tiny AVR? (more subjective, contingent on 1) Regards, Vic
8
votes
1answer
706 views

Arduino Bootloader Details

Can someone please explain how the Arduino bootloader works? I'm not looking for a high level answer here, I've read the code and I get the gist of it. I've also read through this other post (I had ...
5
votes
3answers
1k views

Arduino Bootloader

I am very new to embedded world. I had been till now working only on S/W Can anyone please explain me the use of the Arduino Bootloader? I want Arduino to perform some simple mathematics using some ...
3
votes
3answers
622 views

AVR external clock problem

hey i have some chips with the arduino bootloader on it and some chips without. I want to use them using the same circuit. The confusion I have is with the clock the arduino uses 16MHz external and ...
7
votes
3answers
1k views

I don't get the arduino concept

I have been struggling with making an arduino for a while (was successful in making a breadboard version using ISP programmer cable). They say that Arduino bootloader is made so that no external ...
5
votes
3answers
1k views

Arduino Bootloader

If I upgrade my arduino from the ATMega 168 to ATMega 328 will I be able to use the ATMega 168 like a stock chip from the factory or will the bootloader prohibit this? In other words, will I be able ...
2
votes
1answer
1k views

ATMega chips come with the Arduino bootloader

Do the Arduino Duemilanove USB Board with Atmega328 come with the Arduino bootloader?