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RTI’s Network Data Distribution Service (NDDS), the first commercially available publish-subscribe middleware based on the Object Management Group’s (OMG’s) Data Distribution Service (DDS) V1.0, has been integrated with Green Hills Software’s INTEGRITY RTOS, the first operating system to be certified under the “POSIX: Certified by IEEE and The Open Group” program to the latest
IEEE 1003.1-2003 System Interfaces Product Standard (listed on the certification register at http://get.posixcertified.ieee.org/register.html).

Dan Mender, Green Hills Software’s director of business development, explained, “Green Hills Software’s INTEGRITY RTOS has proven itself in many mission-critical systems. As an example, it has been mandated by the JSF program because it provides the highest level of security, reliability and performance requirements. With RTI’s NDDS support for fault-tolerant and high-availability applications, the combination is a strong software infrastructure solution for those developing distributed safety-critical and mission-critical applications.”


NDDS is First Commercially Available DDS Implementation

A requirement common to most real-time distributed applications is the need to pass data efficiently between different subsystem modules. These modules may be on different processors or spread across multiple computers connected through a transport mechanism such as Ethernet, shared memory or a backplane such as VME. These subsystems gather and generate data through interfaces with sensors, monitor and process data, or control and communicate with other subsystems.

Under the OMG DDS standard, developers specify various quality of service (QoS) parameters such as reliability versus best-effort delivery, expected rates of publication and how long data is valid throughout the network. Modules sending data become publishers and are only concerned with the specific data type they communicate. Modules needing specific information are subscribers and only need to know about the particular data they wish to receive.

NDDS takes advantage of the capabilities inherent in the Data-Centric Publish-Subscribe (DCPS) model to offer a high-quality implementation developed with the requirements of real-time and embedded systems in mind. NDDS minimizes the need for multiple data copies, resulting in increased performance. Also, NDDS allows the application to pre-allocate resources, increasing reliability and real-time determinism.


About INTEGRITY

The INTEGRITY RTOS provides a complete development solution for real-time, mission-critical and safety-critical systems. Capable of meeting the industry’s most demanding security and safety standards, the INTEGRITY RTOS is securely partitioned, guaranteeing each task the resources it needs to run correctly while fully protecting the operating system and user tasks from errant and malicious code, including denial of service attacks, hackers, worms and Trojan horses. It features advanced memory-protection capabilities, an optional ARINC 653 partition scheduler, dynamic download, task- and system-level debug, and a configurable real-time EventAnalyzer tool.

The INTEGRITY RTOS is built on Green Hills Software’s small and fast velOSity microkernel. Both products share a rich set of device drivers, Board Support Packages and middleware, including IPv4, IPv6, IPsec, SSL, SSH, Web server and graphics. The ability to migrate seamlessly between the velOSity microkernel and the INTEGRITY RTOS provides embedded software developers with unprecedented scalability.


Availability

NDDS integrated with Green Hills Software’s INTEGRITY RTOS is immediately available with full support and maintenance from RTI.


About Green Hills Software

Founded in 1982, Green Hills Software, Inc., is the technology leader for real-time operating systems and software development tools for 32- and 64-bit embedded systems. The royalty-free velOSity microkernel, INTEGRITY RTOS, compilers, MULTI and AdaMULTI Integrated Development Environments and TimeMachine 4-D debugger offer a complete development solution that addresses embedded systems from the lowest cost consumer products to the most safety-critical aircraft flight systems. Green Hills Software is headquartered in Santa Barbara, CA, with European headquarters in the United Kingdom. Visit Green Hills Software on the web at www.ghs.com.


About RTI

Real-Time Innovations, Inc., (RTI) provides software tools, middleware and professional services for distributed real-time systems and embedded applications. Its NDDS middleware and tools provide seamless communications and comprehensive tools for distributed real-time system builders. Customers span the embedded software industry from aerospace and defense, through networking and communications, to industrial automation and consumer electronics.


RTI, Real-Time Innovations, ScopeTools and NDDS are registered trademarks or trademarks of Real-Time Innovations, Inc. Green Hills Software, the Green Hills logo, MULTI, velOSity, INTEGRITY, AdaMULTI and TimeMachine are trademarks or registered trademarks of Green Hills Software, Inc. in the U.S. and/or internationally. POSIX is a registered trademark and 1003.1 is a trademark of the Institute of Electrical and Electronic Engineers, Inc. The Open Group is a trademark of The Open Group in the U.S. and other countries. All other trademarks used in this document are the property of their respective owners.

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