• Advanced GDB Usage

    In this reference-style post, we discuss some of the more advanced and powerful commands of the GNU debugger, GDB, as well as cover some of the best practices and hacks I’ve found over the years that help make GDB more pleasant to use.

  • Separating Unique Parameters from Firmware Binaries

    In this post, we take a look at a method for separating unique parameters such as keys and IDs from firmware. This enables us to program these parameters separately from the firmware, making our setup much more scalable and suitable for use in production.

  • What we've been reading in September

    Here are the articles, videos, and tools that we’ve been excited about this August and September.

  • Faster Debugging with Watchpoints

    In this post we will explore how to save time debugging by making the most of watchpoints. We will walk through a few classic use cases of watchpoints by debugging an example application with GDB. Then, we will dive into how watchpoints are implemented for ARM Cortex-M based MCUs with the Data Watchpoint & Trace (DWT) unit and explore some advanced features.

  • Secure firmware updates with code signing

    In this post, we explain why firmware signing is important, how it works, and what algorithm should be used to implement it. We also detail a full implementation built with open source, cross platform libraries.

  • Monitoring Fleet Health with Heartbeat Metrics

    In this post, we lay the foundation for how an organization should instrument their embedded firmware to measure performance, stability, and the overall “health” of each device and an entire fleet of devices. We also compare and contrast the various approaches projects generally take to surface these metrics and I’ll discuss why I believe heartbeat metrics are the best method for driving product decisions.

  • Parsing Logs Messages for Instant Crash Analysis

    Having a logger display execution information on the terminal is pretty common for firmware developers. What’s less common is having an instant stack trace when the program crashes.

  • What we've been reading in July

    Here are the articles, videos, and tools that we’ve been excited about this July.