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OS supports avionics apps with time, space-partitioned RTOS

14 Apr 2016

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A reduced footprint implementation of DDC-I's safety-critical, DO-178C-certifiable Deos real-time operating system (RTOS) from DDC-I targets NXP's ultra-reliable MPC 56XX and 57XX family of microcontrollers (MCUs).

The NXP MPC56XX and MPC57XX families of processors, built on Power Architecture technology, feature hardware and software compatibility across the product line and are optimised for safety-critical applications such as powertrains, engine management, motor control, body control, gateways, chassis control, instrument clusters and display management.

Available in single- and dual-core versions with scalable processor speeds from 32MHz to over 300MHz, the processors also provide a versatile, scalable mix of on-board memory, peripherals and thermal qualities that make it very attractive for avionics end point and automotive applications operating in the harshest environments requiring the utmost in safety, reliability and software integrity.

DDC-I's Deos supports these devices with a time- and space-partitioned RTOS that is certifiable to DO-178C Design Assurance Level A (DAL A), allowing avionics applications with mixed criticality to be safely integrated on the same processor in the same operating environment.

Deos is a safety-critical embedded RTOS that has been certified to DO-178 DAL A since 1998. It features deterministic real-time response, and the time- and space-partitioned RTOS employs patented 'slack scheduling' and cache partitioning to deliver faster worst-case response and higher CPU utilisation than any other certifiable safety-critical COTS RTOS. It was built from the ground up for safety-critical applications, and is the only certifiable time and space partitioned COTS RTOS that has been created using RTCA DO-178, Level A processes from the very first day of its product development.

With Deos RTOS, developers can now run high design assurance flight critical applications on the same processor as lower criticality maintenance and monitoring functions in flight, maximising the value-added features they can offer to their customers on avionics end point devices.

Deos also includes technology that enables unmodified reuse of not only software, but also its related certification artifacts. User applications can be bundled as separately loadable binary modules. This modularity allows users to easily integrate software and reuse its associated verification evidence between products and programs, achieving significant cost and schedule savings.

Deos' binary modularity also facilitates software development and integration between multiple application groups or third-parties, enabling developers to independently develop binaries and easily integrate them into the avionics device.

"Deos' partitioning coupled with its unique binary modularity gives application developers the ability to easily snap together and qualify systems built with applications from multiple parties," said Greg Rose, VP of marketing and product management at DDC-I. "It also reduces recertification time, which makes it easier to enhance current products with new features."

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