Getting Started with STM32 & Rust

Introduction

Welcome to the STM32 Rust course. In this lesson, we will cover the basics of embedded programming with Rust on STM32 microcontrollers.

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Prerequisites

Before we begin, make sure you have the following:

1. A computer (macOS, Linux, or Windows)
2. An STM32 development board
3. A USB cable
4. Basic knowledge of Rust programming

Additional Requirements

• Rust toolchain installed
• cargo package manager
• STM32CubeIDE or similar development environment

Optional Tools

These tools can enhance your development experience but are not strictly required.

Very Specific Requirements

For advanced users, you might want to consider:

Even More Specific

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Code Examples

Here’s an example of inline code: println!("Hello, STM32!").

And here’s a code block:

fn main() {
    let mut led = Led::new();
    led.toggle();
    println!("LED toggled!");
}

Blockquotes

Rust is a systems programming language that runs blazingly fast, prevents segfaults, and guarantees thread safety.

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Links

Here are some useful links:

• Official Rust website
• STM32 Rust documentation
• Embedded Rust book

Lists

Unordered List

• First item
• Second item
  • Nested item
  • Another nested item
• Third item

Ordered List

1. Install Rust toolchain
2. Add STM32 target
3. Configure your project
4. Write your first program

Tables

Here’s a comparison table:

Horizontal Rule

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Getting Started

Let’s get started with your first embedded Rust program!

You can find more information in the official documentation.

Why Rust on STM32?

Rust’s ownership model eliminates whole classes of firmware bugs (use-after-free, data races) without sacrificing the zero-cost abstractions you expect from C. On STM32, this means:

• Safer peripheral access with type-checked register interfaces.
• Fewer Heisenbugs in interrupt-heavy code.
• Easier refactors thanks to the compiler catching aliasing mistakes.

Debugging & Tooling Basics

Before flashing, make sure you can:

1. Build in release mode: cargo build --release --target thumbv7em-none-eabihf
2. Run unit tests that don’t touch hardware: cargo test -- --nocapture
3. Flash over SWD (e.g., ST-Link): cargo flash --chip STM32F411RETx --release
4. Open a GDB session with RTT or semihosting logs.

If flashing fails, double-check:

• USB cable quality and power.
• BOOT0/BOOT1 pin states.
• udev rules (Linux) or interface drivers (Windows).

Minimal Blinky Checklist

• Clock: confirm HSI/HSE settings match your board.
• GPIO: enable the port clock (RCC) before toggling a pin.
• Timing: prefer a timer peripheral over busy loops for accurate delays.
• Sleep: use wfi when idle to reduce power and heat.

Production Tips

• Enable panic-halt (or panic-rtt-target) to avoid silent lockups.
• Add a watchdog early; test that it actually resets on stall.
• Capture a reset reason in a static buffer for post-mortems.
• Keep linker scripts under version control and reviewed.

With these basics squared away, you’ll move faster on the remaining lessons while keeping firmware stable.