Latest: FreeRTOS V7.1.1 was released May 1, 2012. View the change history.
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Last site update May 11 2012

 

The FreeRTOS Project

Don't let your RTOS solution lock you in - FreeRTOS is the professional grade, cross platform standard for microcontrollers. 31 architectures - 18 toolchains, millions of product deployments - just 1 market leading RTOS.

* Immediate Free Download * Feature Rich * Easy To Use Pre-configured Projects * Can be (and is) Used in Commercial Applications * Massive User Community * Free Forum Support * Optional Commercial Licensing/Support * Strict Coding Standard * Safety Critical Version Available * Tiny Footprint


FreeRTOSTM is a market leading RTOS from Real Time Engineers Ltd. that supports 31 architectures and receives 77500 downloads a year. It is professionally developed, strictly quality controlled, robust, supported, and free to use in commercial products without any requirement to expose your proprietary source code. Why would you choose anything else? More about FreeRTOS


FreeRTOS+TraceTM (part of the FreeRTOS+ ecosystem showcase) is a trace tool for FreeRTOS. With 15 graphically interconnected views, FreeRTOS+Trace provides a world leading level of insight into the run-time behaviour of your FreeRTOS application, and become an indispensable debugging and optimisation tool.


OpenRTOSTM is a commercially licensed and supported version of FreeRTOS that includes fully featured professional grade USB, file system and TCP/IP components. OpenRTOS is provided by a global engineering company under license from Real Time Engineers Ltd.


SafeRTOSTM is a SIL3 TUV certified RTOS for use on microcontrollers in safety critical applications.


 

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Latest News Snippets:

 

Why choose FreeRTOS?

"It's probably safe to say at this point that FreeRTOS goes through more 'peer-review' than any other RTOS available on the planet. I have used it in several projects - one of which was a multiprocessor environment that used more than 64 processors and needed to run for months reliably. The RTOS core performed well. Take FreeRTOS for a spin." - John Westmoreland

Here are some reasons why FreeRTOS is a good choice for your next application - FreeRTOS...

  • Provides one solution for many different architectures and development tools.
  • Is known to be reliable. Confidence is assured by the activities undertaken by the SafeRTOS sister project.
  • Is undergoing continuous active development.
  • Has a minimal ROM, RAM and processing overhead. Typically a kernel binary image will be in the region of 4K to 9K bytes.
  • Is very simple - the core of the kernel is contained in only 3 C files. The majority of the many files included in the .zip file download relate only to the numerous demonstration applications.
  • Is truly free for use in commercial applications (see license conditions for details).
  • Comes with a porting, platform development, or application development service should it be required.
  • Is well established with a large and ever growing user base.
  • Contains a pre-configured example for each port. No need to figure out how to setup a project - just download and compile!
  • Has an excellent and active free support forum.
  • Has the assurance that commercial support is available should it be required.
  • Provides ample documentation.
  • Is very scalable, simple and easy to use.
  • FreeRTOS offers a smaller and easier real time processing alternative for applications where eCOS, embedded Linux (or Real Time Linux) and even uCLinux won't fit, are not appropriate, or are not available.


FreeRTOS Announcements Mailing List

You can keep up to date with very occasional FreeRTOS announcements by adding yourself to the FreeRTOS mailing list. Emails are infrequent and kept short. We respect your privacy, so do not provide email addresses to any third party. Every email sent contains unsubscribe instructions.



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FreeRTOS Sponsors



Nabto networking protocol for the internet of things

FreeRTOS Partners

ARM Connected RTOS partner for all ARM microcontroller cores

Renesas Electronics Gold Alliance RTOS Partner.jpg
RTOS partner of NXP for all NXP ARM microcontrollers
Microchip Premier RTOS Partner
Texas Instruments MCU Developer Network RTOS partner for ARM and MSP430 microcontrollers
Freescale Alliance RTOS Member supporting ARM and ColdFire microcontrollers
Cypress RTOS partner supporting ARM Cortex-M3
STMicro RTOS partner supporting ARM ARM7, ARM Cortex-M3, ARM Cortex-M4 and ARM Cortex-M0
Atmel RTOS partner supporting ARM Cortex-M3 and AVR32 microcontrollers
Microsemi (previously Actel) RTOS partner supporting ARM Cortex-M3
Atollic Partner
IAR Partner
Keil ARM Partner
Code Red
Embedded Artists




























































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Copyright (C) 2004-2010 Richard Barry. Copyright (C) 2010-2012 Real Time Engineers Ltd.
Any and all data, files, source code, html content and documentation included in the FreeRTOSTM distribution or available on this site are the exclusive property of Real Time Engineers Ltd.. See the files license.txt (included in the distribution) and this copyright notice for more information. FreeRTOSTM and FreeRTOS.orgTM are trade marks of Real Time Engineers Ltd.
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