Writing and Compiling Rust Code for the RP2040 Chip

The Raspberry Pi Pico, powered by the RP2040 microcontroller, has gained significant popularity among embedded systems enthusiasts and hobbyists. While it’s often programmed in C/C++, Rust has also emerged as a compelling option for developing firmware for this chip. In this article, I’ll guide you through the process of writing and compiling Rust code for the RP2040 chip using the rp-hal and rp-pico crates. We’ll illustrate the process with a simple LED blink example.


Before we dive into writing and compiling Rust code, make sure you have the following prerequisites in place:

  1. Rust Environment: You need Rust installed on your development machine. You can install Rust by following the instructions at rustup.rs.
  2. Cargo and Rustc: Ensure that you have Cargo (the Rust package manager) and Rustc (the Rust compiler) properly set up.
  3. RP2040 Toolchain: You’ll need the RP2040 toolchain. You can obtain it by running the following commands:
    rustup target install thumbv6m-none-eabi
    cargo install flip-link
    cargo install elf2uf2-rs --locked

  4. Raspberry Pi Pico: Have a Raspberry Pi Pico board on hand for testing your code.

Setting Up Your Project

Let’s create a new Rust project and configure it for the RP2040 chip.

  1. Create a new Rust project using Cargo:bash

cargo new pico-blink --bin cd pico-blink

Edit your Cargo.toml file to add dependencies:


[dependencies] rp-hal = "0.5" rp-pico = "0.5"

Next, create a new main.rs file in the src directory of your project.

In main.rs, import the necessary crates and set up the main function:

// Import the necessary crates
use rp_hal::prelude::*;
use rp_pico::hal::pac as rp2040;

fn main() { // Your code will go here }

Writing the LED Blink Code

Now, let’s write a simple LED blink code for the RP2040 chip. We will blink the built-in LED (pin 25) on the Raspberry Pi Pico.

use rp_hal::prelude::*;
use rp_pico::hal::pac as rp2040;
fn main() {
// Initialize the RP2040 peripherals
let mut pac = rp2040::Peripherals::take().unwrap();
let mut watchdog = rp2040::WATCHDOG::take().unwrap();
// Configure GPIO pin 25 as an output
let mut gpio = rp2040::GPIO::take().unwrap();
gpio.gpio25_ctrl.write(|w| w.funcsel().bits(1)); // 1 corresponds to GPIO function
gpio.gpio25_oe.modify(|_, w| w.bits(1)); // Set pin 25 as an output

// Main loop loop
// Turn the LED on
gpio.gpio25_set.write(|w| w.bits(1));
// Delay for a while
for _ in 0..1_000_000 { cortex_m::asm::nop(); }

// Turn the LED off
gpio.gpio25_clr.write(|w| w.bits(1));

// Delay for a while
for _ in 0..1_000_000 { cortex_m::asm::nop(); }

This code initializes the RP2040 peripherals, configures pin 25 as an output, and enters a loop to toggle the LED state, creating a blinking effect.

Compiling and Flashing

To compile your Rust code and flash it onto the Raspberry Pi Pico, follow these steps:

  1. Build the code:bash

cargo build --release

Convert the resulting binary into a UF2 format file compatible with the Pico:


  1. cargo objcopy --release -- -O binary target/thumbv6m-none-eabi/release/pico-blink.bin
  2. Flash the UF2 file onto the Raspberry Pi Pico:
    • Connect your Pico to your computer via USB.
    • While holding down the “BOOTSEL” button on the Pico, plug it in.
    • The Pico will appear as a USB drive. Copy the pico-blink.bin file to this drive.
    • The Pico will reset, and your Rust program will start running.


With the rp-hal and rp-pico crates, writing and compiling Rust code for the RP2040 chip on the Raspberry Pi Pico becomes accessible and straightforward. You can now expand upon this example to create more complex projects and explore the capabilities of Rust in embedded systems development with the RP2040 microcontroller.


Honeybadger calls the page specified, abstracts how the form collects information, and then generates a fast flow (not a flood) of random information to the form’s endpoint. After several thousand entries have been made, the scammer is unlikely to waste time continually testing the records, as the chances of finding a genuine set of credentials will be almost impossible.

Ubuntu users can run the following from a terminal to install:
$ sudo add-apt-repository ppa:andydixon/honeybadger
$ sudo apt update
$ sudo apt install honeybadger

Alternatively, the source code is available on GitHub:

The original Go-based version (which the Ubuntu PPA is built from) can be found here: https://github.com/andydixon/honeybadger-go

The re-write in Rust (in the early days of me learning it, so the code may/will be poor) can be found here: https://github.com/andydixon/honeybadger

Secure Development Practices: Enhancing Software Security from the Ground Up

Secure development practices are essential for organizations to protect their software from vulnerabilities and potential security breaches. As cyber threats become increasingly sophisticated, developers must be proactive in ensuring that their software is as secure as possible. This article will explore various secure development practices, including adopting a secure development lifecycle, ensuring proper authentication, and implementing secure coding guidelines.

  1. Adopting a Secure Development Lifecycle (SDLC)

A Secure Development Lifecycle (SDLC) is a framework that integrates security best practices and activities throughout the development process. This approach involves several key steps:

  • Requirements analysis: Identify the security requirements of your software early in the development process.
  • Design: Ensure that security is incorporated into the software design, including architecture and data flow diagrams.
  • Implementation: Develop secure code based on established coding standards and guidelines.
  • Testing: Perform comprehensive security testing, including penetration testing and vulnerability assessments.
  • Deployment: Implement security measures during deployment, such as secure configurations and continuous monitoring.
  • Maintenance: Regularly update and patch software to address any discovered vulnerabilities.
  1. Ensuring Proper Authentication and Authorization

Authentication and authorization are critical components of secure software. They help prevent unauthorized access to sensitive data and functionality. To implement robust authentication and authorization:

  • Use strong, multi-factor authentication (MFA) methods that combine something the user knows (e.g., a password), something the user has (e.g., a token or mobile device), and/or something the user is (e.g., biometrics).
  • Implement role-based access control (RBAC) to limit user privileges based on their specific job functions.
  • Avoid using hardcoded credentials or storing sensitive information in plaintext.
  • Regularly review and update access controls to minimize the risk of unauthorized access.
  1. Implementing Secure Coding Guidelines

Secure coding guidelines provide developers with best practices for writing code that is resistant to common security vulnerabilities. Key principles include:

  • Input validation: Validate and sanitize all user-supplied input to prevent injection attacks, such as SQL injection or cross-site scripting (XSS).
  • Output encoding: Encode output to prevent the execution of malicious code on the client side.
  • Error handling: Implement proper error handling to prevent information leakage and ensure a consistent user experience.
  • Least privilege: Limit the permissions of software components to the minimum required for proper functionality.
  • Secure data storage: Encrypt sensitive data both in transit and at rest using industry-standard encryption algorithms.
  1. Conducting Regular Security Training and Awareness

Developers must be educated on the latest security threats and best practices. Organizations should conduct regular security training sessions and provide resources to help developers stay informed. Topics should include:

  • Secure coding practices
  • Common security vulnerabilities and their mitigations
  • Security-related regulatory requirements and standards, such as GDPR and HIPAA
  • Incident response and reporting procedures
  1. Integrating Security Testing and Automation

Incorporating security testing into the development process is crucial for identifying and addressing vulnerabilities before software is deployed. Techniques include:

  • Static application security testing (SAST): Analyze source code for security vulnerabilities without executing the application.
  • Dynamic application security testing (DAST): Test running applications for security vulnerabilities by simulating attacks.
  • Interactive application security testing (IAST): Combine SAST and DAST approaches for more comprehensive testing.
  • Fuzz testing: Submit malformed or unexpected input to an application to uncover potential vulnerabilities.

Automating these tests and integrating them into the development pipeline can help identify security issues early and reduce the risk of deploying vulnerable software.

Adopting secure development practices is vital for protecting software from cyber threats. By incorporating a Secure Development Lifecycle, ensuring proper authentication and authorization, implementing secure coding guidelines, conducting regular security training, and integrating security testing and automation, organizations can significantly enhance security and reduce the risks of data theft.

Benefits of Rust over Go

Rust and Golang are both popular programming languages that have gained a lot of attention in recent years. While both have their strengths and weaknesses, there are some clear advantages to using Rust over Golang in certain situations. In this article, we will explore some of the key benefits of Rust and why it may be a better choice for certain types of projects.

First and foremost, Rust is a systems programming language that was designed with memory safety and performance in mind. It is known for its ability to handle low-level system programming tasks, such as creating operating systems, device drivers, and other high-performance applications. Rust was created by Mozilla and has quickly gained popularity among developers for its unique features and capabilities.

One of the main benefits of Rust over Golang is its memory safety. Rust uses a concept called ownership to manage memory, which helps to prevent common memory-related errors such as null pointer dereferencing, use-after-free, and buffer overflow. This makes Rust a great choice for writing secure code that is less prone to crashes and vulnerabilities.

Another key advantage of Rust is its performance. Rust’s memory management system allows for low-level control over memory, which means that it can be optimized for maximum speed and efficiency. Rust also has a built-in compiler that can optimize code for specific architectures, which can result in significant performance gains.

In addition to its memory safety and performance benefits, Rust also has a unique feature called “fearless concurrency.” This allows developers to write concurrent code that is safe and easy to understand, even for beginners. Rust’s ownership system and memory management make it possible to write concurrent code without worrying about data races and other common concurrency issues.

Golang, on the other hand, was designed with simplicity and scalability in mind. It is a great choice for writing web applications, network services, and other types of software that require high concurrency and low latency. Golang is known for its fast compilation times and its ability to handle large codebases.

While Golang may be a better choice for certain types of projects, it does have some limitations compared to Rust. For example, Golang’s garbage collector can lead to unpredictable performance in certain situations, which can be a problem for high-performance applications. Golang also lacks the same level of memory safety as Rust, which can make it more prone to security vulnerabilities.

In conclusion, while both Rust and Golang have their strengths and weaknesses, there are some clear benefits to using Rust in certain situations. Rust’s memory safety, performance, and concurrency features make it a great choice for systems programming, high-performance applications, and other types of software where security and efficiency are top priorities. Golang, on the other hand, is a great choice for web development, network services, and other types of software where scalability and simplicity are more important. Ultimately, the choice between Rust and Golang depends on the specific needs and requirements of the project at hand.