This article explains the Linux SPI driver framework, layering, device‑tree matching, and data‑transfer process, providing clear examples, key APIs, and step‑by‑step instructions to help beginners grasp SPI communication and resolve common development issues.
The author details how to flash an Armbian image, modify the build scripts, compile the Linux 6.19‑rc1 kernel, and install the resulting .deb packages on a Radxa Rock5B+ board, achieving a smooth mainline boot and 4K video playback.
This article explores various network provisioning methods for embedded devices—including SmartConfig, SoftAP, Combo, NFC, and acoustic techniques—covers essential Wi‑Fi concepts and terminology, and provides a hands‑on guide to implementing SmartLink on Linux with code examples and packet analysis.
This article explains the role of Device Tree in embedded Linux, its history, file formats, compilation methods, syntax details, and provides practical examples—including GPIO, LED, and custom sensor implementations—to help developers create and integrate custom hardware descriptions efficiently.
This article provides a comprehensive side‑by‑side comparison of embedded RTOS and embedded Linux across real‑time performance, kernel architecture, resource demands, security, development difficulty, core features, networking, power consumption, startup speed, driver and application development, GUI support, and career prospects, ending with a decision‑tree guide to help choose the right platform.
This guide walks you through extracting the vsftpd source, configuring the ARM cross‑toolchain, compiling the server, copying binaries and configuration files to the target board, creating a startup script, and testing the FTP service from a PC client.
This article compares embedded Linux and RTOS, explaining their strengths, real‑world trade‑offs, and how to decide which platform fits a given embedded project based on performance, development speed, ecosystem, and cost considerations.
This guide explains how to automatically add a user with a preset password on an embedded Linux device at boot by manually creating the user once, extracting its entries from /etc/shadow and /etc/passwd, and inserting those entries into the buildroot target filesystem before flashing.
This guide explains why and how to implement MDIO over GPIO on a Linux system, covering MDIO fundamentals, Clause22/Clause45 frame structures, YT8521 PHY pinout, required kernel drivers, device‑tree configuration, log verification, and command‑line usage.
This guide explains what rsync is, how to compile it for an ARM development board, configure it to avoid SIMD and other features, install the binary, and use rsync commands with options like -a, -v, -z, -u and --progress to efficiently synchronize files between the board and a PC.
This article explains OTA update mechanisms, analyzes why over‑the‑air upgrades cause frequent device reboots due to OOM‑killer and memory fragmentation, and provides concrete steps to disable panic_on_oom and adjust CMA settings to prevent crashes.
This guide explains what core dump files are, how to configure foreground and background processes to generate them on embedded Linux, and provides step‑by‑step commands and sample code for enabling core dumps and analyzing them with arm‑linux‑gnueabihf‑gdb.
This article explains the role of the Memory Management Unit (MMU) in protecting memory, describes what uClinux is, outlines the key differences between uClinux and standard Linux, and provides practical steps for configuring and porting applications to run on MMU‑less embedded systems.
The Notkia project repurposes a Nokia 168x handset with a custom Linux‑based PCB, offering LoRa, Wi‑Fi, Bluetooth, GPS, and a full Debian desktop, while detailing hardware specs, software plans, and the motivation behind creating a privacy‑focused, single‑handed mobile device.
The Notkia project transforms a Nokia 168x handset into a fully functional Linux smartphone by fitting a custom‑designed PCB with a mainline Linux kernel, offering detailed hardware specs, planned open‑source software, and a crowdfunding roadmap for future production.
This article walks through practical techniques—compiler tuning, application trimming, init and rootfs optimization, kernel configuration tweaks, and U‑Boot Falcon mode—to reduce the boot time of a BeagleBone Black Linux system from over nine seconds to just 2.4 seconds, while also shrinking the filesystem size.
This guide outlines six effective debugging techniques—including dtdiff, kernel device‑tree inspection, U‑Boot fdt commands, dtc decompilation, kernel fdt inspection, and of_property APIs—to help developers quickly locate and resolve device‑tree‑related issues during driver development.
This guide walks through the complete workflow of embedded Linux system porting, covering the rationale and setup of a cross‑compilation environment, bootloader selection and migration, kernel configuration and build, and root filesystem creation, while offering practical commands, tool recommendations, and troubleshooting tips.
This article surveys the most notable open‑source operating systems for the Internet of Things, covering both Linux‑based and non‑Linux platforms, and highlights their memory footprints, power efficiency, modular networking stacks, security features, and real‑time determinism requirements.
This guide explains how to build OpenWrt 15.05 for the NEWIFI D1 router, covering its hardware specs, known bugs, required source modifications, and step‑by‑step compilation instructions so hobbyists can get a functional firmware image.
