µC/OS-II Kernel Overview
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Overview
µC/OS-II
µC/OS-II, The Real-Time Kernel is a highly
portable, ROMable, very scalable, preemptive real-time, multitasking
kernel (RTOS) for microprocessors and microcontrollers. µC/OS-II can manage up to 255 tasks and provides the following
services:
- Semaphores
- Mutual Exclusion Semaphores (to reduce priority inversions)
- Event Flags
- Message Mailboxes
- Message Queues
- Task Management (Create, Delete, Change Priority, Suspend/Resume
etc.)
- Fixed Sized Memory Block management
- Time Management
- Timer Management
µC/OS-II runs on a large number of processor
architectures (see PORTS).
µC/OS-II is Certifiable for use in Safety
Critical Systems
A Validation Suite(tm) developed for µC/OS-II provides all
of the documentation necessary to deliver µC/OS-II as a pre-certifiable
software component for safety critical systems, including avionics
RTCA DO-178B and EUROCAE ED-12B, medical FDA 510(k), and IEC 61508
standard for transportation and nuclear systems. The very affordable
Validation Suite(tm), is available through Validated Software.
It is immediately certifiable for the highest criticality systems,
including DO-178B Level A, Class III medical devices, and SIL3/SIL4
IEC-certified systems. For more information, check out the µC/OS-II page on the Validated Software web site (www.ValidatedSoftware.com)
or call +1- 303-531-5290.
If your product is NOT safety critical, you should view the certification
as proof that µC/OS-II is a very robust and highly reliable
RTOS.
DO-178B Certifiable RTOS
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Federal Aviation Administration (FAA) |
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µC/OS-II has been revised to follow most
of the 127 MISRA C rules
The source code for µC/OS-II is now 99% compliant with the
Motor Industry Software Reliability Association (MISRA) C Coding
Standards. These standards were created by MISRA to improve the
reliability and predictability of C programs in critical automotive
systems. Members of the MISRA consortium include Delco Electronics,
Ford Motor Company, Jaguar Cars Ltd., Lotus Engineering, Lucas
Electronics, Rolls-Royce, Rover Group Ltd., and other firms and
universities dedicated to improving safety and reliability in automotive
electronics. Full details of this standard can be obtained directly
from the MISRA web site, http://www.misra.org.uk.
A detailed µC/OS-II compliance matrix describing all of MISRA's
127 C Coding Rules is available from Micrium (download AN-2004 from our application notes page).
µC/OS-II Kernel Awareness for Debuggers
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An add-on module is available that gives IAR's C-SPY debugger µC/OS-II kernel awareness. Click HERE for details. |
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Lauterbach Inc., Europe's leading manufacturer of microprocessor
development tools offers kernel awareness for µC/OS-II. |
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Nohau's Seehau debugger comes with µC/OS-II Kernel
Awareness.
Download the "µC/OS-II - Sehau Manual" |
Reasons for choosing µC/OS-II
See REASONS for choosing µC/OS-II in your next embedded
product!
Read some of the reviews about the µC/OS-II book
"There is no equivalent to this book. The knowledge offered
here, along with the complete source code for the µC/OS-II real-time operating system is everything you need to know to understand
preemptive priority-based multitasking. Whether you just want to
learn what goes on behind the scenes in your commercial RTOS or
you're looking for a small, inexpensive RTOS with source code,
this is the book for you.", Michael Barr from Annapolis, MD, USA
"Never in my career I've seen a so good, clear written book!
Exceptional value for money! You can learn the basics of real
time OS in a very short time thanks to Mr Labrosse's style of explanation.
invaluable for the embedded world. Good work Jean J., a very good work!"
Franchini Giorgio from Bergamo, Italy.
"Jean LaBrosse is one of those people who has that uncanny
knack for taking a complicated issue and making it seem simple.
His MicroC/OS is a wonderful example. The book does much more than
simply present usable source code (though it does that also). It
explains _WHY_ the code is the way it is. µC/OS-II is very
much in today's spirit of open-source software. It is rapidly becoming,
for real-time embedded systems, what Linux represents for desktops.
The OS is not just a good OS for real-time systems, but a good,
_RELIABLE_, OS in general. If only we could get Microsoft to follow
Labrosse's KISS approaches."
Jack W. Crenshaw (Columnist
for Embedded Systems Programming Magazine)
"The book clarifies some of the most obscure real-time programming
concepts. It even does it in a language accessible to everybody,
with tons of images and code samples. Labrosse's coding standard
is exemplary: consistent and clear. The book also explains how
to port µC/OS-II over different CPU architectures, which is really
useful. The reference section is also very clear. Highly recommended
to anyone involved in real-time programming. I just wish I would
have found this book years ago."
Jean Louis Gareau (Author
of Windows CE from the Ground Up) from the USA
"I had never used a real-time kernel. I bought µC/OS-II and Embedded Systems Building Blocks to get started. The books
are very well written. The kernel works great. And, in a couple
of days, I was up and running my first application based on the
µC/OS-II kernel. No need to shop for another kernel, no need
to shop for other books to explain how a kernel works. This book
is the answer to all your questions about "What is a real-time
kernel? And how does it work?"
Robert Bowen from St. Peters,
MO, USA
"I have not actually read many technical books... I usually
reference them when I have to during a project. This book is different..
it is structured to be read (1st 7 chapters) and explains the RTOS
extremely well. I liked the instances where info is re-iterated,
because it is quite alot to take in and any redundancy helps. I
am a hardware designer of 20 yrs and plan on using the RTOS in
my latest Rabbit based Wireless LAN gadget mainly because of the
clarity of it's operation expressed in this publication."
John Yaron from Peckville, PA USA
"If you're new to the subject of RTOS: Buy the book.
Read it.
Try it.
Use it.
This book is an eye opener.
It makes you want to create every project with this RTOS, provided your chip
has enough resources.
The best thing about it: The price is right and the secrets are out.
It's all well documented C-source.
You will love it."
Jan Homuth from Frankfurt, Germany
"Whether or not you end up using this RT Operating System - or another - or not be using an Operating System at all - this book gives you a very good illustration of all concurrency issues you should consider when desgining an embedded application."
Yoav Yanai from Arendonk, Belgium
µC/OS-II Context Switch Animations
( You need the Macromedia
Flash Plug-in to view the animation )
Other animations will be added in the future.
The µC/OS-II Story
Read the µC/OS Story.
µC/OS-II RAM Calculator Spreadsheet
Use this spreadsheet (Microsoft Excel format) to determine the
amount of RAM needed by µC/OS-II in your application.
Click HERE to download
You may need to change the size of OS_FLAGS, OS_STK and POINTER
to match your processor.
Simply set the values of the ENABLE #defines and sizes of other
constants as per your OS_CFG.H file.
© Micrium 2005 |
