The Simplest Bootloader Written from Scratch for STM32F4
--- --- Introduction A bootloader is a critical piece of software responsible for initializing the hardware and loading the main application. Whether you’re working on a custom project or exploring how embedded systems boot up, understanding bootloaders is essential. In this blog post, I’ll guide you through writing a simple bootloader from scratch for the STM32F4 microcontroller, a popular choice among developers. You’ll learn the basics of what a bootloader does, how to set up your development environment, and how to write and test your first bootloader. You can find the complete code on my GitHub repo . 1. Understanding Bootloaders A bootloader is the first code that runs when a microcontroller is powered on or reset. Its primary responsibilities are: Initializing the hardware (e.g., setting up the clock, configuring GPIOs). Loading the main application from a specific memory location. Jumping to the main application’s entry point to start execution. In more complex ...
