California Zephyr

In-Depth Analysis of the LE Set Scan Parameters Command in the Zephyr Bluetooth Stack

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In-Depth Analysis of the LE Set Scan Parameters Command in the Zephyr Bluetooth Stack

1. Protocol Interpretation The HCI_LE_Set_Scan_Parameters command is used to set the scanning parameters. 1.1 Command Parameters LE_Scan_Type indicates whether the scan is active or passive. The LE_Scan_Interval and LE_Scan_Window parameters are recommendations from the Host on how long (LE_Scan_Window) and how frequently (LE_Scan_Interval) the Controller should scan. The LE_Scan_Window parameter shall always be set to … Read more

Release of Zephyr SDK Glue v0.5.0

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Release of Zephyr SDK Glue v0.5.0

Dear friends following HPMicro, the <span>Zephyr v3.7.0 (LTS)</span> version and <span>hpm_sdk v1.6.0</span> version of <span>Zephyr SDK Glue v0.5.0</span> has been officially released. The repository link is: https://github.com/hpmicro/zephyr_sdk_glue Zephyr Development Package for HPMicro MCU Zephyr is a general-purpose embedded real-time operating system with good scalability.Zephyr SDK Glue (abbreviated as ZSG) is an open-source software package developed … Read more

Exploring Open Source Embedded RISC-V SoCs: Supported Operating Systems and Development Platforms

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Exploring Open Source Embedded RISC-V SoCs: Supported Operating Systems and Development Platforms

The RISC-V architecture is rapidly emerging as a strong force in the SoC design field due to its open-source and scalable features. However, for many developers, understanding which operating systems can run on RISC-V SoCs and what development platforms are needed remains a challenge. This article will delve into the operating systems supported by RISC-V … Read more

Using Percepio View to Trace Zephyr: A Comprehensive Guide

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Using Percepio View to Trace Zephyr: A Comprehensive Guide

In 2021, I introduced the basic principles and configuration of the Zephyr tracing system in two articles: Introduction to Zephyr Tracing System – Part 1 and Configuration and Invocation Framework of Zephyr Tracing System – Part 2. At that time, Percepio only offered paid software, so I did not continue writing about how to use … Read more

Zephyr Enthusiasts Monthly Issue 5 – 202505

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Zephyr Enthusiasts Monthly Issue 5 - 202505

This issue records the latest news and shareable content about Zephyr, published in the last week of each month. This magazine is open source (GitHub: lgl88911/Zephyr_Fans_Monthly[1]), and contributions, issue submissions, or recommendations for Zephyr content are welcome. Project Data Excluding merges, 355 authors pushed 1,676 commits to the main branch and 1,771 commits to all … Read more

Comparative Analysis of FreeRTOS, Zephyr, ThreadX, and Mbed OS

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Comparative Analysis of FreeRTOS, Zephyr, ThreadX, and Mbed OS

Introduction: Why the Choice of RTOS Can Be a Game Changer Choosing an RTOS (Real-Time Operating System) is one of the most strategic decisions in embedded product development. It determines how devices handle tasks, respond to events, and the reliability of cross-platform scalability. With the increasing diversity of connected devices (from low-power wearables to complex … Read more

AALTO’s Zephyr Solar Drone Achieves Continuous Flight Record of 67 Days

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AALTO's Zephyr Solar Drone Achieves Continuous Flight Record of 67 Days

On May 2, AALTO announced that its Zephyr High Altitude Platform System (HAPS) has set a new stratospheric flight record, with one of its aircraft flying continuously for 67 days. The flight was jointly managed by the stratospheric operations center located in Farnborough, Hampshire, UK, and a ground control station in the United States, operating … Read more

Zephyr Enthusiasts Monthly Issue 4 – 202504

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Zephyr Enthusiasts Monthly Issue 4 - 202504

This issue records the latest news and shareable content about Zephyr, published in the last week of each month. This magazine is open source (GitHub: lgl88911/Zephyr_Fans_Monthly[1]), and contributions, issue submissions, or recommendations for Zephyr content are welcome. Project Data Excluding merges, 367 authors pushed 1,770 commits to the main branch and 1,884 commits to all … Read more

The Role of Stack in Assembly Language: Similar to a Handbag

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The Role of Stack in Assembly Language: Similar to a Handbag

The concept of a stack in assembly language is not easy to understand. In the previous article, the usage of the stack was introduced, and in this article, I will briefly discuss my understanding of the role of the stack. In life, a stack can be likened to a temporary residence for travelers. In assembly … Read more

Zephyr 4.1 Released: Performance Surpasses FreeRTOS and ThreadX

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Zephyr 4.1 Released: Performance Surpasses FreeRTOS and ThreadX

FreeRTOS, as the most widely used RTOS in the market, has been the developer’s first choice due to its superior performance and permissive open-source terms.Since Microsoft made ThreadX open-source and free for commercial use at the end of 2023 (hosted by the Eclipse Foundation), it quickly attracted a large number of developers and rapidly captured … Read more