New branch for SMART68
Fix bug of col6 and pwm
Fix bug of col15
Add breathing backlight support for smart68
Modify default keymap
Add missed function declaration
Change build option of SMART68
Modify default keymap
New features for SMART68
- SoftPWM LED
- Breathing LED
- Fading LED
- Typing LED
- Ledmap
- Ledmap in EEPROM
- Built-in function tricky esc