The FreeRTOS Project

Don't let your RTOS solution lock you in - FreeRTOS is the professional grade, cross platform standard for microcontrollers. 31 architectures - 17 toolchains, millions of deployments - just 1 market leading RTOS.

FreeRTOS^TM includes official ports to 31 architectures and receives more than 77,500 downloads a year. It is market leading, robust, supported, portable, open source, free to download, and free to deploy. FreeRTOS can be used in commercial applications without any requirement to expose your proprietary source code. With a growing ecosystem, FreeRTOS is commonly integrated with both open source (example 1, example 2) and commercial (example 1) TCP/IP, file system, and USB components.

Each official port includes a pre-configured example application that demonstrates the kernel features, expedites learning, and enables 'out of the box' development.

Did you know that FreeRTOS...
Why choose FreeRTOS...
Supported architectures and tools...

OpenRTOS^TM 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 under license by a global engineering company.

SafeRTOS^TM is a SIL3 RTOS version that has been certified for use in safety critical applications. It is a functionally similar product for which complete IEC 61508 compliant development/safety lifecycle documentation is available (conformance certified by TÜV SÜD, including compiler verification evidence). SafeRTOS is provided under license by a global engineering company.

 

Did you know? FreeRTOS came top in the 2011 EETimes embedded market study in two categories: The kernel currently being used, and the kernel being considered for the next project! Some FreeRTOS ports never completely disable interrupts. For strict quality control purposes, and to remove all IP ownership ambiguity, official FreeRTOS code is separated from community contributions. The FreeRTOS community has provided both tick-less low power, and multicore versions of FreeRTOS. The RL78 port can create 13 tasks, 2 queues and 4 software timers in under 4K bytes of RAM!

 

Sample FreeRTOS News Snippets: Latest news: Real Time Engineers Ltd. release FreeRTOS ports for the new Infineon XMC4000 family Cortex-M4 and NXP LPC1100 Cortex-M0 microcontrollers. FreeRTOS V7.1.0 has been released. This incorporates the TriCore port, adds an RX630 demo, and adds Cortex-M4F ports for IAR and Keil. The Keil port is demonstrated on an LPC4350 (running at 204MHz), and the IAR port is demonstrated on an STM32F4. Official TriCore support has been added. Code is available immediately. FreeRTOS V7.0.2 has been released. Kinetis Cortex-M4 (including a web server), updated Microblaze, Renesas RL78, and Renesas RX200 ports and demos have been added. V7.0.2 also includes other new features and enhancements. FreeRTOS V7.0.1 has been released. V7.0.1 adds demo applications for the Fujitsu FM3 microcontroller, incorporates the Microsemi SmartFusion code into the main download, and updates the projects that build with the Renesas RX compiler. FreeRTOS V7.0.0 has been released. This includes many kernel enhancements and a brand new, efficient, software timer implementation. FreeRTOS V7.0.0 is completely backward compatible with FreeRTOS V6.x.x for effortless upgrading. See the change history log for full details. Demos have been added for the Microsemi (formally Actel) SmartFusion mixed signal FPGAs. IAR, Keil and GCC/SoftConsole projects are provided. A new FreeRTOS Windows simulator has been launched, with two demo projects both of which use different but free build and debug tools.   All news snippets...

 

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.

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.