Product category: Embedded Software and Operating Systems
News Release from: Green Hills Software
Edited by the Electronicstalk Editorial Team on 2 July 2002

RTOS to preserve
integrity of bomber trainers

NLX is to use Green Hill Software's Integrity RTOS and AdaMulti integrated development environment (IDE) to upgrade the B-1 Bomber Weapons System Trainer (WST)

The WST is used to train aircrews for missions aboard the B-1 Bomber, providing pilots and weapons systems officers with a true to-life simulation of the B-1's flight and weapons systems. The Integrity RTOS, hosting PowerPC 740 application software developed with Green Hills Software's AdaMulti IDE, is used in the B-1's flight control system, which performs all the navigation, guidance, display, and weapons system functions.

The WST duplicates the B-1 environment, from the design of the cockpit, to the PowerPC/Integrity-based software used in the B-1's flight computers.

NLX selected Integrity and AdaMulti for the WST in order to create a precise simulation environment for the B-1.

However, NLX engineers also cited Integrity's flexible build environment, noting that Integrity made it easy for them to add special training software to the WST.

Unlike the software used in the actual B-1, NLX engineers had to custom-build code that "listens" for messages from the training instructor.

This software, known as trainer hooks, allows instructors to stop the simulator mid-flight and give assistance to trainees.

Integrity is a secure, fast, deterministic, real-time operating system optimised for embedded applications that place a premium on safety, reliability, real-time performance and testability.

Using a processor's MMU facilities, Integrity builds a firewall between the kernel and user tasks that prevents errant or malicious code from corrupting other user tasks or the kernel.

Integrity also delivers maximum responsiveness and determinism by running with interrupts continuously enabled and guaranteeing access to the CPU and memory for critical tasks.

Integrity is tightly integrated with the AdaMulti IDE, which, together with Green Hills Software's family of Ada95 and C/C++/EC++ optimising compilers, automates all aspects of embedded PowerPC software development.

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