Micro-Controller Operating Systems: Difference between revisions

Revision as of 08:40, 1 December 2024

Latest revision as of 15:34, 19 August 2025

(2 intermediate revisions by 2 users not shown)

Line 50:

| source model = [[Commercial software|Commercial]]

| released = {{Start date and age|2020|06|23}} (forked from uC/OS-III V3.08.00)<ref name=cesium_changelog>{{cite web|url=https://weston-embedded.com/cesium-release-notes/cs-os3-release-notes|title=Cs/OS3 Release Notes|publisher= Weston Embedded Solutions}}</ref>

| latest release version = Cs/OS3 3.09.0205<ref name=cesium_changelog />

| latest release date = {{Start date and age|20232025|0604|2322}}<ref name=cesium_changelog />

| marketing target = [[Embedded device]]s

| programmed in = [[ANSI C]]

Line 62:

'''Micro-Controller Operating Systems''' ('''MicroC/OS''', stylized as '''μC/OS''', or '''Micrium OS''') is a [[real-time operating system]] (RTOS) designed by Jean J. Labrosse in 1991. It is a priority-based [[Preemption (computing)|preemptive]] [[Real-time computing|real-time]] kernel for [[microprocessor]]s, written mostly in the programming language [[C (programming language)|C]]. It is intended for use in [[embedded system]]s.

MicroC/OS allows defining several functions in C, each of which can execute as an independent thread or task. Each task runs at a different priority, and runs as if it owns the [[central processing unit]] (CPU). Lower priority tasks can be preempted by higher priority tasks at any time. Higher priority tasks use operating system (OS) services (such as a delay or event) to allow lower priority tasks to execute. OS services are provided for managing tasks and memory, communicating between tasks, and timing.<ref>{{cite web |url=httphttps://people.ece.cornell.edu/land/courses/ece5760/NiosII_muCOS/ |title=NiosII GCC with MicroC/OS |author=<!--Unstated--> |date=June 2006 |website=School of Electrical and Computer Engineering |publisher=Cornell University |access-date=25 April 2017}}</ref>

==History==

Line 141:

===Task states===

μC/OS-III is a [[Computer multitasking|multitasking]] operating system. Each task is an infinite loop and can be in any one of five states (dormant, ready, running, interrupted, or pending). μC/OS-III supports an unlimited number of task priorities but configuring μC/OS-III to have between 32 and 256 task priorities typically suits most embedded systems well.<ref>https://media.digikey.com/PDF/Data%20Sheets/Micrium%20PDFs/UC_OS-III_RTOS.pdf#:~:text=Micrium%E2%80%99s%20%CE%BCC%2FOS-III%20supports%20ARM7%2F9%2C%20Cortex-MX%2C%20Nios-II%2C%20PowerPC%2C%20Coldfire%2C,are%20available%20for%20download%20from%20the%20Micrium%20website. {{Bare URL inline|date=August 2025}}</ref>

===Round robin scheduling===

Line 188:

*{{Official website|https://web.archive.org/web/20231206170818/https://www.silabs.com/developers/micrium}}

*{{GitHub|SiliconLabs}}

*[httphttps://people.ece.cornell.edu/land/courses/ece5760/NiosII_muCOS/uC_Functions.html Summary of Commonly Used uC/OS-II Functions and Data Structures]

*[httphttps://people.ece.cornell.edu/land/courses/ece5760/NiosII_muCOS/ NiosII GCC with MicroC/OS]

*[http://www.farnell.com/datasheets/1950186.pdf μC/OS-II Reference Manual]

*[http://ftp1.digi.com/support/documentation/0220047_e.pdf How to Get a μC/OS-II Application Running]