Understanding the essential changes made on the tmk_keyboard firmware should help you understand the QMK Firmware.
| Firmware | TMK | QMK |
|---|---|---|
| Maintainer | hasu (@tmk) | Jack Humbert et al. |
| Build path customization | TMK_DIR = ... |
include .../Makefile |
keymaps array data |
3D array of uint8_t holding keycode |
3D array of uint16_t holding keycode |