Dear all, In my quest to run the ATMEGA328P chip on 3.3V supply, I have burned its bootloader to the 'Arduino Pro or Pro Mini, 3.3V 8MHz' bootloader using Arduino IDE. Later, I disabled the brown-out detection (BOD) and used the internal 8 MHz clock by changing fuse bits. I did this using an Arduin…

You can upload the code via ISP with Arduino IDE - see "Sketch -> Upload using Programmer" [image] Burning sketches to the Arduino board with an external programmer | Arduino... How to use the Arduino software with a hardware programmer (eliminating the need for the bootloader and saving…

To my knowledge HEX files don't contain fuse information. But if you can issue an avrdude command to upload the HEX file you can simply add the fuse information to that command and the fuses will be set. As avrdude is a GUI-less command you can integrate it into scripts so you don't have to add all …

Thank you for your suggestions @pylon and @mrburnette . Unfortunately I have damaged my chip and currently trying to recover. I shall get back to this thread with how your suggestions helped me. Heartiest thanks.

There is a way to define fuses in the source code , and they'll end up in the .elf file. Atmel called it "elf production file" And see Unfortunately, I don't think there is a standard for including the fuses in a .hex file, and I don't think that avrdude supports the single all-inclusive elf (or .…

[image] westfw: Unfortunately, I don't think there is a standard for including the fuses in a .hex file, You are correct if "single" HEX is implied, but easy for individual files: avrdude -c arduino -P com9 -p ATMEGA328P -b 19200 -U hfuse:w:\Users\owner\AppData\Local\Temp\backup_hfuse.hex EC…

Hex file for an ATMEGA328P chip with changed fuse bits integrated

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mrburnette December 20, 2022, 5:24pm 4

Yep...
Old post, may need a few edits, however:

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Hex file for an ATMEGA328P chip with changed fuse bits integrated

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