Retirement Clock for ATmega4809 Curiosity Nano

Retirement clock implemented in C for ATmega4809 Curiosity Nano microcontroller as part of Embedded Microprocessor Systems course.

Contributors

Left button turns backlight on for 5 seconds(adjustable).
Right button rotates views:
- View #1: date and time (clock view).
- View #2: days, hours, minutes, and seconds until retirement (countdown view).
- View #3: days, hours, minutes, and seconds the system has been running.
Serial user interface implements:
- SETDATETIME dd.mm.yyyy hh:mi:ss
- GET DATETIME
- SET BIRTHDAY dd.mm.yyyy
- GET BIRTHDAY
- SET BACKLIGHT seconds
- GET BACKLIGHT
Sounds a buzzer when it is time to retireand displays "Go home, old-timer!"(centered, divided into two rows, obviously)