This is a keyboard firmware library with some useful features for Atmel AVR and Cortex-M.
Source code is available here: https://github.com/tmk/tmk_keyboard/tree/master/tmk_core
flabbergast's Chibios protocol was merged from https://github.com/flabbergast/tmk_keyboard/tree/chibios. See protocol/chibios/README.md. Chibios protocol supports Cortex-M such as STM32 and Kinetis.
separated with TMK Keyboard Firmware Collection
These features can be used in your keyboard.
Complete firmwares for various keyboards and protocol converters.
https://github.com/tmk/tmk_keyboard
GPLv2 or later. Some protocol files are under Modified BSD License. ChibiOS, LUFA and V-USB stack have their own license respectively.
See doc/build.md.
TBD
#define VENDOR_ID       0xFEED
#define PRODUCT_ID      0xBEEF
#define MANUFACTURER    t.m.k.
#define PRODUCT         Macway mod
#define MATRIX_ROWS 8
#define MATRIX_COLS 8
#define MATRIX_HAS_GHOST
Architecture Diagram
                           +---------------+---------------+-------------+
                           |    Host       |   Keyboard    | Matrix, LED |
   ___________             |-----------+-+ +-------------+ | +-----------|
  /          /| Keys/Mouse | Protocol  |d| | Action      | | | Protocol  |
 /__________/ |<-----------|  LUFA     |r| |  Layer, Tap | | |  Matrix   |
 |.--------.| |   LED      |  V-USB    |i| |-------------| | |  PS/2,IBM |             __________________
 ||        || |----------->|  UART     |v| | Keymap      | | |           |  Keys      / /_/_/_/_/_/_/_/ /|
 ||  Host  || |  Console   |           |e| | Mousekey    | | |           |<----------/ /_/_/_/_/_/_/_/ / /
 ||________||/.<-----------|           |r| | Report      | | |           | Control  / /_/_/_/_/_/_/_/ / /
 `_========_'/|            |---------------------------------------------|-------->/___ /_______/ ___/ /
 |_o______o_|/             | Sendchar, Print, Debug, Command, ...        |         |_________________|/
                           +---------------------------------------------+              Keyboard
Use PJRC's hid_listen to see debug messages. You can use the tool for debug even if firmware use LUFA stack.
You can use xprintf() to display debug info on hid_listen, see common/xprintf.h.