kernel-basics

Create Zephyr threads, logging, and shell commands with K_THREAD_DEFINE, LOG_MODULE_REGISTER, and SHELL_CMD_REGISTER.

59|13|Updated Feb 7, 2026

Search Tags:#logging #cli #threads #shell #kernel #zephyr

Ready to run

npx skills add https://github.com/beriberikix/zephyr-agent-skills --skill kernel-basics

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: kernel-basics
Source: https://github.com/beriberikix/zephyr-agent-skills/tree/main/skills/kernel-basics
Command: npx skills add https://github.com/beriberikix/zephyr-agent-skills --skill kernel-basics

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill helps developers quickly learn and apply Zephyr kernel basics to build robust, multi-threaded applications with observable behavior.

Core Features & Use Cases

Threads & Scheduling: create and manage threads, set priorities, and understand preemptive vs cooperative scheduling for responsive embedded apps.
Logging & Diagnostics: standardize module logging, configure backends, and use logging to monitor system health.
Interactive Shell (CLI): expose commands for live device inspection and on-device debugging.

Quick Start

Enable logging in your Zephyr project by turning on CONFIG_LOG and registering a sample module with LOG_MODULE_REGISTER.
Define a simple thread with K_THREAD_DEFINE to run a background task.
Add a basic shell command using SHELL_CMD_REGISTER to expose status information.

Frequently Asked Questions about kernel-basics

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I create a background thread in Zephyr?▼

To create a background thread in Zephyr, use the K_THREAD_DEFINE macro to statically define a thread with its stack size and priority. This ensures correct thread creation and lifecycle management for responsive multi-threaded embedded applications.

How do I enable logging in a Zephyr project?▼

Enable logging in a Zephyr project by turning on CONFIG_LOG and registering a module with LOG_MODULE_REGISTER. This standardizes module logging and configures backends to monitor system health and observe application behavior.

What is the difference between preemptive and cooperative scheduling in Zephyr?▼

Zephyr scheduling differentiates preemptive threads, which can be interrupted by higher priority tasks, from cooperative threads that yield voluntarily. Understanding this distinction is essential to set priorities and build responsive embedded apps.

Can I use Zephyr shell commands for on-device debugging?▼

Yes, you can use Zephyr shell commands for on-device debugging by exposing commands with SHELL_CMD_REGISTER. This provides an interactive CLI for live device inspection and direct status reporting.

Do I need CONFIG_LOG to use LOG_MODULE_REGISTER in Zephyr?▼

Yes, you must enable CONFIG_LOG in your Zephyr project configuration before using LOG_MODULE_REGISTER. This activates the logging backend required to capture and output diagnostic messages for system health monitoring.