Final Boss - Rush 01

This project was made during 42 Piscine Embedded in November 2025 as a week-end 'rush' challenge.
It is called 'Final Boss' for it tests everycomponents of a devboard build upon an ATMega328p (except for the eeprom).

Components tested

Components	Model
2 wire communication LEDs	APA102
Parallel I/O Port, 16-Bit	PCA9555PW
I2C LED Display Segments	TOF-F4401AMG-N
Luminosity sensor
Temperature & Humidity Sensor	AHT20
Potentiometer
Physical switchs	AVR-ISP-6 and others
USB-C Connectors for uart connection

The internal clock of the ATMega328p is already tested by the firmware.

Short explaination of the main target

We must implement 11 modes that test every aspect of the components listed previously.

1. Displays the ADC value of the potentiometer in decimal (0 to 1023)
2. Displays the ADC value of the luminosity censor connected to LDR R14 in decimal (0 to 1023)
3. Displays the ADC value of the AVR-ISP-6 connected to NTC R20 in decimal (0 to 1023)
4. Displays the MCU’s internal temperature value in decimal (0 to 1023)
5. Displays “-42-” and makes LEDs D5, D6, D7 (in 2 wire com) and D8 flash red, then green, then blue (1 second between each color)
6. Displays the ambient temperature in Celsius
7. Displays the ambient temperature in Fahrenheit
8. Displays the humidity as a percentage
9. Displays the time in 24-hour format (23:23)
10. Displays the day and month
11. Displays the year

Switching from one mode to another is made by pressing two buttons, one to go up in the mode (+1) and other to go down (-1). Reaching mode 11 overflows to mode 1. Date and time can be change using the UART interface.

How to use

To compile and flash it on the memory of the microprocessor

make

Warning
Without the devboard, the firmware will be difficult to test.

To clean build:

make clean