Automatic Car Headlights Control System

Overview

This project implements an automatic headlights system for cars, controlling daytime running lights, low beam, and high beam LEDs. It uses three microcontrollers working together:

• EFR32: Reads ambient light sensor via I2C and sends data via UART.
• STM32F4 Nucleo: Receives sensor data, decides headlights mode, and sends commands via CAN.
• STM32F3 Discovery: Controls LED headlights using PWM based on CAN commands.

Features

• Ambient light sensing and processing
• Multi-MCU communication using UART, CAN, and I2C
• PWM control for LED headlights
• Uses STM32 HAL library for peripheral management

Project Structure

• /stm32f4xx : STM32F4 firmware
• /stm32f3xx : STM32F3 firmware
• /efr32 : EFR32 firmware
• /img : Project illustrations

Build & Flash

• STM32 MCUs: Build with STM32CubeIDE, flash with ST-Link
• EFR32: Build and flash with Silicon Labs tools

Communication Flow

EFR32 (I2C sensor) → UART → STM32F4 (decision) → CAN → STM32F3 (PWM LED control)

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Contributions welcome!

License: Silicon Labs Master Software License Agreement (MSLA)