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Keyboardio Keyscanner firmware

Firmware for an ATTiny88 to act as a keymatrix scanner and LED driver.

Key reporting and rollover detection are tested and working, all options in the configuration register are saved but do not yet influence behaviour.

Getting started:

  1. Install an avr toolchain (if you're on OS X, try CrossPack for AVR®)
  2. cd firmware
  3. make
  4. make flash and make fuse as necessary to program your MCU

Common issues:

avrdude: no programmer has been specified on the command line or the config file

avrdude needs to know what kind of programmer you're using. You can uncomment/edit one of the PROGRAMMER lines in firmware/Makefile, or add a default_programmer directive to your ~/.avrduderc.

For more information, check out firmware/Makefile.

avrdude: AVR Part "attiny48" not found.

avrdude can't find a part config for the attiny48. You can resolve this by appending doc/attiny48.avrduderc to ~/.avrduderc:

cat doc/attiny48.avrduderc >> ~/.avrduderc

Porting to different hardware

It's possible to configure this project for different AVRs. Check out config/attiny48.h to get familiar with the required definitions and application considerations.