19
votes
Accepted
Arduino Nano ATmega328P bootloader difference
The bootloader currently shipped on the official Arduino Nano boards and selected via the Arduino IDE's Tools > Processor > ATmega328P after choosing Tools > Board > Arduino Nano is the same version ...
- 4,298
11
votes
Accepted
Can we burn Arduino bootloader into any microcontroller chip?
The answer needs to have multiple parts:
Yes, in principle you can create a bootloader for any microcontroller, which acts like the Arduino's.
Please be aware that there are different bootloaders, ...
- 2,466
9
votes
Accepted
ino.hex vs ino.with_bootloader.hex
If flashing with AVR In System Programing (ISP) the bootloader is not needed. Only the flashing over Serial needs a bootloader.
The ISP erases the flash including the bootloader. To be able to use ...
- 18.3k
9
votes
Accepted
Can I program a factory fresh Atmega328P through UART pins without burning a bootloader?
No, the ATmega's ISP does not operate over the UART pins but only the ISP pins.
To program it via a UART, you need to first load a bootloader, unless your chip was pre-programmed by the vendor, ...
- 5,411
8
votes
Accepted
Can I force a function to live in the boot sector without overwriting the bootloader?
The Optiboot version 8 has a do_spm function which can be called from application. The Optiboot repository contains an example for the use of this function.
SPM is the AVR CPU instruction to write to ...
- 18.3k
7
votes
Accepted
Purpose of USB (FTDI) and ICSP connectors
The ICSP is used for 'bare metal' programming. This what you'd use if you wanted to replace or remove the bootloader, change the clock oscillator settings, or program the device as a bare 328.
The ...
- 404
6
votes
Is it possible to upload an arduino sketch through the serial port (RX) instead of USB
No need to have a specific bootloader. The basic bootloader can do that (in Arduino that's the case so I hope this answer will apply in your case. But if not, the principle is certainly the same).
...
- 365
6
votes
Accepted
Extend program space by getting rid of bootloader on NANO
It's enforcing this line from the arduino:avr boards.txt
nano.menu.cpu.atmega328.upload.maximum_size=30720
To be clear, the board is assumed to have a bootloader, even if you're not using it to get ...
- 5,739
5
votes
Accepted
Arduino Burn the code programmatically
First, the Arduino Uno has 32 KB of flash, but only 1 KB of RAM. So, to be able to store the new program in a string means your new program can only be, at most, 1kb.
Secondly, only the bootloader ...
- 11.3k
5
votes
Accepted
How does the compiler/assembler work wrt bootloader?
On the Uno and similar AVR-based boards, the compiler and assembler are
not aware of the bootloader. The compiled program starts at address
zero. There you have the interrupt vector table, starting ...
- 45.2k
4
votes
avrdude fuse error when programming ATMEGA328 without crystal
The ATMega328P datasheet has the following table in it:
The top 5 bits of the of the Extended Fuse Byte are default 1 and are reserved. You're not really supposed to change them, since they might be ...
- 5,739
4
votes
Accepted
What does avrdude: Device signature = 0x000000 mean? Faulty wiring? Software issue? Incorrect tutorial?
There is one part of the tutorial that is incorrect - or rather missing.
When you open the serial port the Arduino resets. That includes when the serial port is opened by avrdude.
You need to prevent ...
- 106k
4
votes
As a novice, how do I program my Atmega328p?
Are the ATMEGA and STM32 programmers not universal?
They are not the same. As far as I know their programming arrangements are completely distinct.
What programming methods can this chip support?
...
- 1,192
4
votes
Accepted
How do I escape a boot loop?
Start holding the reset button. This is to prevent the Arduino from entering the boot loop.
Unplug the Arduino and plug it back in.
Open a new sketch. Remove all of the code and replace it with int ...
- 317
4
votes
How to compile without adding the bootloader?
Seeing .bootloader section in size output doesn't mean it's really present. It just means the sum of all three is 4152 bytes.
You can check the hex file if it contains large block of data at the ...
- 4,907
3
votes
Accepted
add ID number to the feather m0 bootloader (flash)
This is quite an easy fix, actually.
The problem here is the compiler doesn't think the const is used for anything - so it (quite rightly) throws it away.
All you need to do is tell the compiler ...
- 106k
3
votes
ino.hex vs ino.with_bootloader.hex
While flashing the Arduino over USB (UART) you use the bootloader in that case the bootloader doesn't delete itself that's why the Arduino IDE sends the file without the bootloader. You need to use ...
- 686
3
votes
Accepted
ATTiny85 Digispark clones failing USB handshake - how to program them?
I had problems too - SHORT: all about USB-hub or PC's root-hub and extension cables +Luck.
My ebay items were going under the name "Digispark Kickstarter ATTINY85 Arduino Micro USB Development Board"...
- 46
3
votes
Arduino Pro Micro bricked?
Problem solved! By taping twice the reset and holding it the second time I managed to program my board and now the arduino ide detectes it and it works as expected.
Taping and releasing the button ...
- 163
3
votes
Arduino Pro Micro bricked?
After bricking a few units I finally sat down and read the manual for my SparkFun Qwiic Pro Micro - USB-C (ATmega32U4). I also figured out the cause.
The cause of my unit bricking was bad code. ...
- 131
3
votes
Accepted
AVR-GCC can't call function located on fixed address
I've tried this code with arduino and it worked (i taught, of course, i can't add the "-Wl,--section-start=.app_start=0xFA0" flag to the compilation process so the function not gonna be moved to other ...
- 193
3
votes
Is there some hardware that can be used to upload sketch source code via USB flash disk (Automatically By plugging it in)
There is a solution with SD card and SD bootloader. You put a bin file on SD card, insert it into the SD adapter and power up the Arduino. The bootloader loads the bin file to flash memory.
I use '...
- 18.3k
3
votes
Can we burn Arduino bootloader into any microcontroller chip?
You cannot just load a sketch into any microcontroller, because every microcontroller has different memory layout, peripherals, ways of uploading, FLASH size etc.
You can use the atMega (or any ...
- 13k
3
votes
D1 mini esp8266 error: esptool.FatalError: Failed to connect to ESP8266: Timed out waiting for packet header
I'm not sure if this will help EVERYONE, but I hope it at least helps someone. I had the same issue with several different boards (3 Nano's, 2 NodeMCU ESP8266's, and 1 Uno). I searched and searched ...
- 31
3
votes
Accepted
Forcing bootloader startup through program
Theoretically it is quiet easy to fake that double-tap with software, but there might be some obstacles in practice.
The bootloader uses an unsigned long value in RAM memory to indicate if the double ...
- 1,928
3
votes
Accepted
Loading code to a mega 2560
Only from bootloader section is it possible to write to flash on ATmega2560. Optiboot 8 has a do_spm function to write to flash. It is accesible over a header file available in examples in the ...
- 18.3k
3
votes
How to Burn Bootloader with custom Fuses
You can use MiniCore boards support package for Arduino IDE to work with nonstandard AVR boards or breadboard setups. This core has many settings in Tools menu to set different parameters of the board....
- 18.3k
3
votes
Accepted
Problem in upload bootloader into esp32
esp32 has a fixed bootloader in read only memory. it is not replaceable
ArduinoISP sketch is a programmer only for classic ATmega MCU boards
in valid case you would have to select the programmer in ...
- 18.3k
3
votes
How does Arduino board separate USB traffic (uploading code vs. communication)?
It doesn't distinguish anything. It's all down to what code is running on the board at any moment.
When you reset or power up the bootloader runs. It listens for uploaded code. If it doesn't get an ...
- 106k
3
votes
Accepted
How do I upload a sketch without a bootloader, using another Arduino as a programmer?
There are a few guides on the internet that explain how to do this, but I've
found that most of them contain too much ambiguity or leave important details
out. This is my attempt at writing a short ...
- 317
Only top scored, non community-wiki answers of a minimum length are eligible