bootloader

Bootloader

If you buy a kit from cftkb.com your microcontroller already has the bootloader flashed and you do not need this.

This project uses USBaspLoader as the usb bootloader on the atmega32a.

• My custom bootloader:
  https://github.com/coseyfannitutti/USBaspLoader/tree/atmega32a

  • Please ensure you are in the atmega32a branch of my fork of the USBaspLoader repository when downloading.

  • Follow the directions in the readme for directions on setting up the build environment for your operating system as well as flash instructions.

  • Makefile.inc sets flashing device as usbtiny, as I use a sparkfun pocket avr programmer. If you need to use another programmer please edit line 41 of Makefile.inc accordingly. Only edit Makefile.inc, and NEVER directly edit the actual Makefile.

  • Commands for flashing once build environment is set up:

    make flash (flashes makefile)

    make fuse (sets fuses for microcontroller)

Enter bootloader mode

1. Press and hold BOOT switch
2. Tap RESET switch
3. Release BOOT switch

Alternatively, you can hold BOOT switch while inserting the USB cable.

If you have successfully entered bootloader mode you should see USBaspLoader in device manager or as a connected device in QMK Toolbox.