Linux

Introduction In the embedded world, the question is no longer which OS should I use, but how can I make them work together? Modern SoCs are blurring the line between real-time microcontrollers and application processors. Chips like the STM32MP2 from STMicroelectronics integrate both a Cortex-A35, capable of running a full Linux distribution, and a Cortex-M33, […]

Accelerating early Linux boot with Yocto multiconfig By Paul Le Guen de Kerneizon Introduction In embedded products, cutting seconds, or even hundreds of milliseconds, from power‑on to application readiness is often critical. In this article, I will present a practical workflow to measure, compare, and iteratively reduce the early boot window of a Linux embedded […]

Power saving has always been a major preoccupation in embedded systems, as by definition, they could have energy constraint. Of course now, energy saving is still on the heart of the discussions. Energy saving is always a set of compromise. In terms of system or peripherals availability, time to wake… In this blog, we will […]

The Yocto Project’s Five-Year Plan The Yocto Project is one of the most successful technologies to build reliable industrial-grade embedded Linux distributions. In order for the project to keep growing, the Sovereign Tech Fund has decided on a Five-Year Plan that shapes its stability and attractiveness for the years to come. These developments were carried […]

We are delighted to announce our continued collaboration with the Embedded Recipes conference, scheduled for September 28th and 29th at the Biermans Lapotre Foundation in Paris. For its 5th edition this year, we will be participating as a sponsor, delivering an engaging presentation, and having our team on-site to meet and greet you in person! […]

TL;DR Audio pipelines often use asynchronous devices, which must be synchronized with resampling. Measurements show CPU load of resampling reach almost 30% of a CPU core on an i.MX8M Nano. A possible optimization is to use feedback with USB UAC2 audio gadget. alsaloop already supports it, as Pipewire since a recent version. A sound server […]

PipeWire, implementation and evaluation In the last article, we prepared an audio system on which we could replace the sound server. In addition, we explained the main concepts of JACK and PulseAudio in audio recording and playback. This second part presents PipeWire, how to use it in our audio system and measures its performance. PipeWire PipeWire is […]

Audio system set-up In Linux embedded system world, ALSA (Advanced Linux Sound Architecture) is the lowest level way to provide an API for sound card device drivers. However, its limitation is to only allow one process to open a device. This is why we need sound servers, which take care of handling sound streams between applications. They are the […]

Introduction Continuous Integration (CI) is a development practice that consists in constant and frequent merges of a team’s contributions into a shared repository. Code quality, reliability and non-regression are verified thanks to automated  builds and testing prior merging each modification. Unlike software applications, there are multiple things to consider when setting up a CI with […]