REAL TIME OPERATING SYSTEM(RTOS)

By Bayar Shahab Supervised by Dr. Tara Yahya

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OUTLINE֍ What is RTOS?

֍ Types of RTOS?

֍ Characteristics of RTOS

֍ Functions of RTOS

֍ RTOS Architecture

֍ Advantages and disadvantages of RTOS

֍ Applications of RTOS

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WHAT IS RTOS?▪ Is an operating system that is specially designed to run

applications with very precise timing and a high degree of reliability(National instruments, 2013).

▪ Single tasked in opposition to generic OSs Which run several tasks

▪ What is jitter?

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TYPES OF RTOS Hard RTOS

Meet required deadlines within the bounded time otherwise it may lead tocatastrophic error Firm RTOS

Deadline may not cause a catastrophic or fatal error, but may cause undesiredeffects or may degrade the performance of the system Soft RTOS

Missing a deadline may not be catastrophic and cause fatal errors, but they areundesired and unwanted(Best effort).

CHARACTERISTICS OF RTOS

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Reliability

Predictability

PerformanceScalability

Compactness

FUNCTIONS OF RTOS

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Task management

Scheduling

Resource allocation

Interrupt handling

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RTOS ARCHITECTURE

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ADVANTAGES AND DISADVANTAGES OF RTOS

Advantages • Task scheduling and shifting.• Deterministic behavior.• Inter-task communication.• Maximum Consumption.• Error Free.• Task can have priority.• Scalable.• Portable.• Provision for interrupts

Disadvantages • Sometimes cost is more.• Availability of Development tools.• Low support for variety of peripheral devices.• Low Protection and Security mechanisms.• Low multi-tasking.• Limited Tasks.• Multiple Users.• Multiple Modes.• Not easy to program

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APPLICATIONS OF RTOS

• Web server.• Aircraft control.• Radar systems.• Network switching control systems.• Satellite monitoring systems.• GPS system.• Nuclear reactor systems.• MRI

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CONCLUSION

Questions ??????

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REFERENCES [1] National Instrument, (2013, Nov.22), What is a Real-Time Operating System (RTOS)? Available: http://www.ni.com/white-paper/3938/en/[2] H.ARORA, (2012, FEB.6), what is RTOS? Real Time Operating Systems Basics , Available: http://www.thegeekstuff.com/2012/02/rtosbasics/[3] W.Cedeo and P.Laplante, (2015), An Overview of Real-Time Operating Systems, Available: http://jla.sagepub.com/content/12/1/40.full[4] Pantech solutions, REAL TIME OPERATING SYSTEM (RTOS) CONCEPTS, India.[5] silberchatz, glaving and Gange,Operating system concepts 8th ed.USA:2009.[6] Renesas Electronics Corporation,(2010, Jan.4),General RTOS Concepts, Available: http://www.renesas.com