keytee -- Controller breakout board for small keyboards

[trebb]

I'm totally sure I didn't need to flash any bootloader when I built these They come with Atmel's loader. As does the TQFP ATmega32u2. Factory fresh they jump to the bootloader on power up. [...]

Can confirm now. Pristine ATmega32u2 MCUs come up with a bootloader. Uploading the firmware .hex file turns the thing into a keyboard; no fuse modification required. You don't need any programmer hardware.

Programming the EEPROM doesn't seem to work, though. Most projects don't use EEPROM a lot, but if one does (example), the LUFA bootloader might still be required. (I tried, unsuccessfully: dfu-programmer atmega32u2 flash-eeprom testhexfile.eep.)