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RTEMS Logo

Welcome to the RTEMS home page!

RTEMS is the Real-Time Operating System for Multiprocessor Systems. It is a full featured RTOS that supports a variety of open API and interface standards. Major decisions about RTEMS are made by the Steering Committee, guided by the Mission Statement.

We encourage everyone to contribute changes and help testing RTEMS, and we provide access to our development sources with anonymous CVS and snapshots.

We strive to provide regular, high quality releases, which we want to work well on a wide range of embedded targets using cross development from a variety of hosts including GNU/Linux, MS-Windows FreeBSD, Mingw, Cygwin, and Solaris.

Locations of visitors to this page

Current Training Dates

  • RTEMS Kick Start: TBD in Huntsville, Alabama USA
  • Open Class: TBD in Huntsville, Alabama USA
  • Other dates in Munich, Germany and Huntsville, Alabama TBD
For more detailed information and registration forms, see the RTEMS Training wiki page.

Release and Active Development

Featured Projects:

News/Announcements

  • Wiki Upgraded: (December 13, 2009) The RTEMS MediaWiki. The upgrade went smoothly but if there are any issues, please report them.
  • 4.9.3 Released: (November 16, 2009) The RTEMS Project is pleased to release 4.9.3. This is the fourth release from the 4.9 release series and is primarily a bug fix release. Of interest, and a significant milestone in the history of RTEMS, the release is the first to include test coverage reports. Reports are included for x86, ARM, SPARC, and Coldfire.
  • Test Coverage Reports Available: (October 12, 2009) The RTEMS Project is pleased to announce that test coverage reports are now available for ARM, m68k, PowerPC SPARC, and x86. This is still a work in process with sponsorship of further coverage activities very much appreciated. We want to expand the code base analysed, improve coverage percentage across archtitectures, and do other kinds of analysis including statement and condition/decision coverage analysis. Current results are available here.
  • Google Summer of Code Wrapup Report Available: (October 12, 2009) We have made a wrapup report available here which highlights each of the students' work.
  • Google Summer of Code Concludes: (September 1, 2009) We are proud to announce that our six GSoC and one RTEMS Summer of Code students were very productive this summer. We are working to ensure that as much of their work as possible shows up in the upcoming 4.10 releases.
  • RTEMS 4.10 Fedora 10 Development Environment VMWare Image: (March 16, 2009) The RTEMS Project is proud to announce the availability of a virtual machine preconfigured with the RTEMS 4.10 Development Environment for SPARC and i386. It is ready to run examples on simulators out of the box. We hope that this will lower the bar for getting started with RTEMS and provide a standard reference platform for demonstrations. We encourage all Summer oF Code students without dedicated GNU/Linux installations to try this. It is available for download via BirTorrent. Details are in the Virtual Machines for RTEMS Development Wiki page.
  • Eclipse Plugin for RTEMS Support: (March 13, 2009) This plugin adds support for invoking RTEMS toolchains and libraries within the Eclipse C/C++ Tooling (CDT) environment. Version 1.2.0 adds Hello-World and C++ samples to the plugin's feature set. To obtain the plugin, simply add this URL to your Eclipse installation's list of Update Sites.
  • 4.9.2 Released: (March 12, 2009) The RTEMS Project is pleased to release 4.9.2. This is the third release from the 4.9 release series and is primarily a bug fix release.
  • OpenGroup/IEEE POSIX Permission: (February 17, 2009) The RTEMS Project has been granted permission by the IEEE and Open Group to excerpt and reuse text from the Open Group Base Specification Issue 6 in the RTEMS POSIX API User's Guide and RTEMS Shell User's Guide. This is a major milestone and grants the RTEMS Project the same permissions the GNU/Linux man pages projects and NetBSD have. A scanned copy of the agreement with the signature page removed is available online. We would like to offer our thanks to those who helped in this effort.
  • RTEMS eLearning Site Online: (February 3, 2009) The RTEMS Project now has an eLearning Site (http://moodle.rtems.com/). The site uses the FOSS Learning Management System (LMS) Moodle (Moodle/). Please visit the (RTEMS University Moodle, create an account, watch some presentations, and take some quizzes. There are currently only a handful of modules in the course catalog but OAR plans to populate this with much educational material on RTEMS.
  • 1993 Brochure Online: (January 23, 2009) The year was 1993 and the U.S. Army was trying to promote the benefits of RTEMS. As part of that, a brochure was created. Where you lucky enough to have gotten one of these? If not, we have scanned one so you can see it.
  • 4.9.1 Released: (December 12, 2008) The RTEMS Project is pleased to release 4.9.1. This is the second release from the 4.9 release series and is primarily a bug fix release.
  • Lattice Semiconductor Mico32 Port Submitted: (December 12, 2008) Jukka Pietarinen has submitted a port of RTEMS to the Lattice Semiconductor Mico32. This port is fully functional including network stack support.
  • Renesas Technology M32R and M32C Ports Merged: (October 2, 2008) OAR Corporation has submitted a port of RTEMS to the Renesas M32R and M32C target architectures. Both ports include a BSP for the simulator in GDB. Development tools for this target architecture are available from the RTEMS ftp site. Both ports currently support cooperative multitasking.
  • 4.9.0 Released: (September 24, 2008) The RTEMS Project is pleased to release 4.9.0. This is the first release from the 4.9 release series and is a new features release.
  • 4.9 Branch Created: (September 10, 2008) The RTEMS Project is pleased to announce that the CVS Branch for the 4.9 Release Series has been cut. We have entered a (hopefully short) period testing and polishing which will culminate with the 4.9.0 release. A side-effect of cutting the 4.9 Branch is that the CVS head is open for major submissions again.
  • 4.8.1 Released: (August 13, 2008) The RTEMS Project is pleased to release 4.8.1. This is the second release from the 4.8 release series and is primarily a bug fix release.
  • 4.7.3 Released: (August 8, 2008) On this numerically interesting date, 4.7.3 is released to the RTEMS Community. This is the fourth release from the 4.7 release series and is primarily a bug fix release.
  • Google Summer of Code Projects Announced (April 21, 2008):
RTEMS was fortunate enough to be included as Google Summer of Code project and received four student slots funded by Google. There were over three times as many student proposals as funded slots and all were good. In addition to the four funded student proposals, a few other students wanted to do the project anyway -- truly in the free software spirit. We want to thank Google as well as all the students and mentors involved in this effort. Details on the student projects are at RTEMS Summer Of Code Wiki page.
  • 4.8.0 Released (February 14, 2008): Happy Saint Valentine's Day!!! Today there were two RTEMS releases. The first of these is the long anticipated 4.8.0. 4.8.0 is the first release from the 4.8 release series and represents a long awaited step forward from the 4.8 releases. There have been many improvements to RTEMS itself including optional nanosecond timing granularity, smaller executables, a port to the Blackfin, and new POSIX services. The GNU/Linux RPMs have been updated and there are now MinGW hosted tools for MS-Windows users. On either hosts, users should be able to get started with RTEMS in a matter of minutes. For more details, see the 4.8.0 release information. Please note that if we forgot to include anyone's work in the release information, it is an accident. Please email and we will add the information.
  • 4.7.2 Released (February 14, 2008): The second Valentine's Day present to the RTEMS Community is the 4.7.2 release. This is the third release from the 4.7 release series and is primarily a bug fix release.
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