Here is a list of all files with brief descriptions:

[detail level 12]

Inc
controller.h
exti.h	Public API for external interrupt (EXTI) configuration
lights.h	Public API for Traffic Light control and GPIO management
queue.h	Public API for circular queue implementation
systick.h	Public API for SysTick timer configuration and millisecond utilities
uart.h	Public API for UART2 peripheral
Src
controller.c
exti.c	External Interrupt (EXTI) configuration for vehicle detection inputs
lights.c	Traffic light control and GPIO management
main.c	Application Entry point for the Traffic Control System
queue.c	Circular queue Implementation for managing traffic light requests
syscalls.c	STM32CubeIDE Minimal System calls file
sysmem.c	STM32CubeIDE System Memory calls file
systick.c	SysTick timer configuration and millisecond utilities
uart.c	UART drive implementation