STM32F446 USART2 Driver (Bare-Metal)

Overview

This is a bare-metal UART driver written in C for the STM32F446 microcontroller. It directly configures the USART2 peripheral using register-level access, without using HAL or any vendor libraries.

• TX: PA2 (AF7)
• RX: PA3 (AF7)
• Peripheral: USART2
• Clock: 16 MHz internal clock (assumed default)

Features

• Register-level initialization of USART2
• Blocking character send and receive
• No external dependencies

File Structure

stm32-uart-driver/
├── uart.c # Driver implementation
├── uart.h # Driver interface
├── main.c # Example usage
├── README.md # This file
└── LICENSE # MIT License

Usage

1. Include uart.c and uart.h in your STM32 project.
2. Call usart2_init(baudrate); during initialization.
3. Use usart2_write() to send characters.

Requirements

• STM32F446 microcontroller (or compatible STM32F4 variant)
• 16 MHz system clock
• USART2 peripheral routed to PA2/PA3

License

This project is licensed under the MIT License. See the LICENSE file for details.