TMK Keyboard Firmware

By: Nathan (@itsamenathan)

• Multi-layer Keymap
• Mouse Keys
• System Control Keys
• Media Control Keys
• PS/2 Mouse Support - TrackPoint

What is it?

TMK Keyboard firmware is an opensource firmware available for the ATMEGA32U4 micro-controller.

• Many Keyboard protocals
• Macros
• Locking CapsLock
• Breathing Sleep LED
• Backlight

https://github.com/tmk/tmk_keyboard

What I did

• Happy Hacking Keyboard Lite - OG

• PS/2 breakout cable

• SparkFun ATMEGA32U4 Breakout

• TMK KeyMap File

Happy Hacking

Keyboard Lite

• Introduced on Jun 7, 1999
• PS/2 Interface
• Thanks to Compuhacker for keyboard

PS/2 Breakout Cable

              o  |  o <-- Blue (clock)
Red (vcc) --> o  |  o <-- Green (gnd)
                o o <-- Yellow (data)

SparkFun ATMEGA32U4

• Board - https://www.sparkfun.com/products/11117
• Github - https://github.com/sparkfun/32U4_Breakout_Board
• LUFA-130303 bootloader - File:BootloaderCDC.hex.gz
  • avrdude -p atmega32u4 -P /dev/ttyACM0 -c usbasp -U flash:w:BootloaderCDC.hex
• Program tmk over the bootloader
  • avrdude -p atmega32u4 -P /dev/ttyACM0 -c usbasp -U flash:w:ps2_usb_lufa.hex

TMK KeyMap File

Demo