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.
332 questions
0 votes
1 answer
269 views
Questions about ATMega8A including burning my hex files
I wrote a small blink program for an ATMega8U-DIP I bought recently. The source is this, #ifndef F_CPU #define F_CPU 16000000 #endif #include <avr/io.h> #include <util/delay.h> int main(...
- 121
0 votes
1 answer
86 views
If I use clock_prescale_set in my sketch I will loose access to adafruit feather 32u4?
I want to run my 32u4 in 2MHz. According to gammon I will gain 4mA in runtime. To my understanding this changes all the buses speed like UART, USB?, I2C?** and SPI?*. Probably I will have problems to ...
- 15
0 votes
1 answer
352 views
Xiao ESP32-C6 in CircuitPython
So I recently bought two Xiao ESP32-C6 from SeeedStudio; they work with Arduino code out of the box. Now I want to flash the CircuitPython bootloader from here https://circuitpython.org/board/...
- 123
1 vote
1 answer
236 views
Confusion re: getting bootloader onto new-out-of-the-box Nano v3.0 (classic)
I've been trying to do a sort of "crash course" in Arduino but there's something I'm still confused about. I've read about programming ATTiny microcontrollers using Arduino boards, and I've ...
3 votes
2 answers
443 views
Is is possible to install a bootloader to an Arduino clone without a physical programmer?
I got an Arduino UNO clone, connected it to my PC via USB. I can't upload any sketches. Correct board and port are selected in the IDE. Windows recognizes it as a device, even though it has a CH340 (...
4 votes
3 answers
649 views
How to compile without adding the bootloader?
I'm using a standalone atmega328p with a 16MHz crystal. I'm programming it via avrdude on a raspberry pi, using the SPI and RESET pins. When I compile my program, this is what I see at the end of the ...
- 223
0 votes
4 answers
313 views
Can arduino be used in industrial projects?
I'm developing an industrial project and my programming knowledge is limited to arduino. I'm planning to use either Atmega328 or STM32F103C8T6 chip in my pcb and to program it using arduino IDE. My ...
1 vote
1 answer
183 views
Programming barebones ATMega328 with external programmer and no bootloader
I have created a circuit with a barebones ATMega328. I also have an external programmer (Sparkfun's Pocket AVR Programmer)... Now I want to program a particular sketch... When uploading a sketch, do i ...
- 1,435
1 vote
0 answers
28 views
How does arduino pro micro reset via USB? [duplicate]
The pro micro has no hardware reset circuitry that would allow host PC to cause a reset via USB. But when programming using the bootloader, the host PC must have a way to reset the pro micro to allow ...
- 163
2 votes
1 answer
246 views
Arduino AVR Program with default ATMEGA32U4 bootloader instead
I’m working an Arduino program that uses the FastLED library and is all coded in the Arduino IDE (not my choice, just a result of this OOS library). However, I don’t want to run this on an “Arduino” ...
- 123
4 votes
2 answers
197 views
Turn ESP8266 into an Arduino IDE-like "sketch uploader" (over hardware serial)
I have an ESP8266 module which has downloaded a hex file for an Arduino Mega2560. This hex file (call it mega2560.hex) is sitting in the ESP's SPIFFS file system. What I want to do is basically ...
- 191
1 vote
0 answers
171 views
Cannot change fuses on ATmega32U4
I have a custom board based on Arduino Leonardo (ATmega32u4). As usual I used the Arduino IDE to burn the bootloader with my Atmel ICE ISP programmer. This time it failed complaining about some errors ...
- 393
1 vote
1 answer
107 views
Why Did I Have To Program Duemilanove Bootloader?
As a volunteer for Public Invention, I have developed an Atmega328 based design in which I thought I was largely duplicating the Arduino UNO. Unlike the UNO, I did choose a CH340 USB to UART chip as ...
- 111
2 votes
0 answers
159 views
ESP8266-01S only coming back from DeepSleep every 2nd time
I'm using an ESP8266-01S for a battery-powered project. The ESP is in DeepSleep, a doorbell relay pulls RST to GND, bringing the ESP to life to do some stuff, before going back to DeepSleep. My ...
- 151
0 votes
1 answer
607 views
Pro Micro Double Reset help; Not able to get upload done in 8 seconds
I have timed the double reset as best as possible multiple times but the upload doesn't happen before the board leaves bootloader mode. this is all I'm given as an error which doesn't appear until ...
