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 […]
How to bring fully distributed and secure communication capabilities to embedded products and IOT (Part 2). In a previous article, we presented our work on including Jami in Yocto. This was a huge step to make Jami available on all types of devices. But this Yocto layer was only usable for x86 architectures. In fact, […]
How to bring fully distributed and secure communication capabilities to embedded products and IOT (Part 1). Jami is a communication tool developed by Savoir-faire Linux. It is available for Windows, MacOS, standard Linux distribution like Ubuntu or Fedora and smartphones (Android and iOS). In order to give the opportunity to use Jami in embedded products […]
Using Linux with the PREEMPT_RT option can make it possible to run a modern, secure kernel on an older, limited performance single board computer (SBC), perhaps avoiding a costly hardware upgrade campaign. This topic will be addressed in two parts. The first article will consider Real-Time Linux implementation in the kernel. The second article will […]
The first article in this series presented the motivations and advantages of embedding a container image into a Linux embedded system and considered the challenges that this new paradigm brings up. The second article presented different approaches to embed a container into the Yocto build system, with Docker engine installed on the target machine. A […]
Key takeways: The PREEMPT_RT patchset enables Linux to meet real-time requirements. Different settings allow compromise between latency and data throughput. A minimal Board Support Package (BSP) and distribution can improve latencies. Kernel security hardening measures have a limited impact on latencies. Real-time systems and Linux Systems that are required to guarantee a response to an […]
In the previous article, we talked about the motivations and upsides to embed a container image into a Linux embedded system as well as the challenges this paradigm brings up in a general way. In this article, our perspective is focused on different approaches based on the Yocto build system with Docker engine, installed on […]