Zephyr (operating system): Difference between revisions

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Revision as of 13:23, 27 April 2017

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{{Infobox OS

| name = Zephyr

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| version of = <!-- For articles about releases of operating systems ONLY -->

| developer = [[Linux Foundation]],<br />[[Wind River Systems]]

| family = [[Real-time operating system]]s

| working state = Current

| source model = [[Open source model|Open source]]

| released = {{Start date and age|2016|02|17|df=yes}}<ref name="zephyr-project" />

| discontinued = <!-- DON'TDO useNOT thisuse for articles about releases of operating systems -->

| RTM date = <!-- {{Start date and age|YYYY|MM|DD|df=yes/no}} ONLY for articles about OS releases -->

| GA date = <!-- {{Start date and age|YYYY|MM|DD|df=yes/no}} ONLY for articles about OS releases -->

| latest release version = 1.67.0

| latest release date = {{Start date and age|20162017|1203|1511|df=yes}} <ref>{{cite web|url=https://www.zephyrproject.org/community/blog/announcing-zephyr-os-v160|title=Announcing Zephyr OS v1.6.0|publisher=}}</ref>

| latest preview version = 1.7.99

| latest preview date = <!-- {{Start date and age|YYYY2017|MM04|DD26|df=yes/no}} -->

| marketing target = [[Internet of things]]

| programmed in =

| language = <!-- Supported human languages (English, French, Italian, Arabic, ...) -->

| update model = <!-- APT, Windows Update, etc. -->

| package manager = <!-- dpkg, rpm, Windows installer, etc. -->

| supported platforms = [[ARM architecture|ARM]] ([[ARM Cortex-M3|Cortex-M3]], [[ARM Cortex-M4|Cortex-M4]]), [[x86 architecture|x86]], [[ARC (processor)|ARC]], [[RISC-V]], [[Nios II]]

| kernel type = [[Microkernel|Micro-nanokernel]] (<= 1.5.0)<br /Nanokernel>[[Monolithic kernel|Monolithic]] (>= 1.6.0)

| userland =

| ui =

| license = [[Apache License 2.0|Apache 2.0]]

| preceded by =

| succeeded by =

| website = {{URL|http://www.zephyrproject.org/}}

| support status = <!-- For articles about releases of operating systems ONLY -->

| other articles =

}}

'''Zephyr''' is a small [[real-time operating system]]<ref>http://linuxgizmos.com/zephyr-a-tiny-open-source-iot-rtos/</ref> for connected, resource-constrained devices supporting multiple architectures and released under the [[Apache License 2.0]]. (aA BSD licensed fork can be foundoccurs in the [[Arduino]] 101 software source package from Intel).<ref name="1.0.0-release-notes">[https://www.zephyrproject.org/content/zephyr-kernel-v100-release-notes Zephyr Kernel v1.0.0 Release Notes]</ref>

== History ==

In November 2015, it was originally developed as Rocket<ref>http://windriver.com/products/operating-systems/rocket/</ref><ref>http://www.eejournal.com/archives/articles/20151125-windriver/</ref><ref>https://software.intel.com/en-us/iot/rocket</ref> kernel by [[Wind River Systems]] for [[Internet of Thingsthings]] (IoT) devices.<ref name="patel-zephyr-project">Niheer Patel: [http://blogs.windriver.com/wind_river_blog/2016/02/wind-river-welcomes-linux-foundations-zephyr-project.html Wind River Welcomes Linux Foundation’s Zephyr Project], Wind River Systems, 17 February 2016</ref>

In February 2016, Zephyr became a project of the [[Linux Foundation]].<ref name=":0">{{Cite news|url=http://www.forbes.com/sites/federicoguerrini/2016/02/19/the-internet-of-things-goes-open-source-with-linux-foundations-zephyr-project/|title=The Internet Ofof Things Goes Open Source Withwith Linux Foundation's Zephyr Project|last=Guerrini|first=Federico|date=2016-02-19|work=|newspaper=[[Forbes]]|access-date=2017-01-12|via=}}</ref><ref name="zephyr-project">Zephyr Project: [https://www.zephyrproject.org/news/linux-foundation-announces-project-build-real-time-operating-system-internet-things-devices The Linux Foundation Announces Project to Build Real-Time Operating System for Internet of Things Devices], Linux Foundation, 17 February 2016</ref>

Since then, early members and supporters of Zephyr include [[Intel]], [[NXP Semiconductors]], [[Synopsys]], and UbiquiOS Technology.<ref>{{Cite web|url=http://www.zdnet.com/article/the-linux-foundations-zephyr-project-building-an-operating-system-for-iot-devices/|title=The Linux Foundation's Zephyr Project: A custom operating system for IoT devices {{!}} ZDNet|last=Osborne|first=Charlie|date=2016-02-19|website=[[ZDNet]]|publisher=[[CBS Interactive]]|access-date=2017-01-12}}</ref>

== Features ==

The Zephyr Kernelkernel is a small-footprint kerneland designed for use on resource-constrained systems: from simple embedded environmental sensors and [[light emitting diode]] (LED) wearables to sophisticated smart watches and IoT wireless gateways.

The Zephyr Kernelkernel offers a number ofseveral features that distinguish it from other small-footprint OSes:

* [[Single address- space OS.operating system|Single address-space]]

* Highly configurable.

* Resources defined at compile-time.

* Minimal error checking.

* Development services.

=== Security ===

A group is dedicated to maintaining and improving the security.<ref>{{Cite web|url=http://www.techrepublic.com/article/linux-foundation-announces-zephyr-project-an-open-source-iot-operating-system/|title=Linux Foundation announces Zephyr Project, an open source IoT operating system - TechRepublic|last=Wallen|first=Jack|date=2016-02-18|website=[[TechRepublic]]|publisher=[[CBS Interactive]]|access-date=2017-01-12}}</ref> Also being owned and supported by a community means the eyes of the world's open source developers are vetting the code, which significantly increaseincreases Zephyr security.<ref name=":0" />

=== Single address-space OS ===

Combines application-specific code with a custom kernel to create a monolithic image that gets loaded and executed on a system’s hardware. Both the application code and kernel code execute in a singleone shared address space.

=== Highly configurable ===

Allows an application to incorporate only the capabilitiesabilities it needs, as it needs themneeded, and to specify their quantity and size.

=== Resources defined at compile-time ===

Requires all system resources be defined at compilation[[compile time]], which reduces code size and increases performance.

=== Minimal error checking ===

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=== Development services ===

DevelopmentThe development services offeringoffer a number ofseveral familiar services for development, including:

1. Multi-threading services for both priority-based, non-preemptive cooperative threads and priority-based, preemptive threads with optional round robin time-slicing.

2. Interrupt services for both compile-time and run-time registration of interrupt handlers.

3. Inter-thread synchronization services for binary semaphores, counting semaphores, and mutex semaphores.

4. Inter-thread data passing services for basic message queues, enhanced message queues, and byte streams.

5. Memory allocation services for dynamic allocation and freeing of fixed-size or variable-size memory blocks.

6. Power management services such as tickless idle and an advanced idling infrastructure.

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==References==

{{Reflist}}

<references />

== External links ==

*[http://{{Official website|www.zephyrproject.org/ Official website]}}

{{Real-time operating systems}}

{{Microkernel}}

[[Category:Real-time operating systems]]

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[[Category:ARM operating systems]]

[[Category:Operating system stubs]]

{{MicroKernel}}