RTOS (Real Time Operating System) is special operating system that offers the guarantees real time applications a specific ability along with a particular deadline. So, now we will explain about what is real time operating system (RTOS) with its examples, and applications involving with different types of real time operating system with ease. Therefore, at the end of this post; you will definitely fully educate about Real Time Operating System without any issue.
What is Real Time Operating System?
Definition – RTOS is stands for “Real time operating system”, and it is also known as embedded operating system. Real time operating system is totally depending upon the clock interrupts. This system produces the Interrupt Service Routine (ISR) interrupts. RTOS implemented the Priority system for executing all types of process. Entire RTOS is synchronized with the process, and they can make communication in between all process.
Block Diagram of Real Time Operating System
ROM (Read Only Memory) chip is used for storing the RTOS because this chip is capable to store data in long life
RTOS Tutorial Headlines:
In this section, we will show you all headlines about this entire article; you can check them as your choice; below shown all:
What is Real Time Operating System?
Types of Real Time Operating System
Components of Real Time Operating System
Function of Real time Operating System
Examples of Real Time Operating System
Applications of Real Time Operating System
GPOS vs RTOS
Real Time Operating System Positive Side
Real time Operating System Negative Side
Key Considerations About RTOS
FAQs (Frequently Asked Questions)
What is RTOS in embedded system?
What is role of real time operating system?
What is RTOS full form in embedded system?
What is the use of RTOS in embedded system?
What are the most popular examples of RTOS in embedded system?
What are different types of real-time operating systems?
What are the applications of real time operating system in real-life?
What are the functions of a real time operating system?
Let’s Get Started!!
Types of Real Time Operating System
There are three types of Real time O/S, describe below each one:
Soft Real Time O/S allows few delay with using this operating system, but in this SRT (Soft Real Time) O/S defines the deadline to particular jobs (tasks). In this system, do not allow delay in large amount of time, so due to that mechanism their deadlines are managed by the Soft Real Time O/S.
Examples are: Cameras, smart phones, data management, online transaction, online bid in stock exchange etc.
Firm Real Time:
In Firm Real Time O/S accepts the more deadline rules. so occurrences of the missing deadlines are not getting more impact but could be show some unpredictable outputs, and due to that can be reduced the quality of all products.
Some examples are: Automation system in the industry sector like as visual inspection, Multimedia products.
Hard Real Time:
In the Hard Real Time, all feeding tasks must be begun to execute on predefined scheduling time, and their given all tasks must be done within allotted time duration. So due to that in this RTOS, all deadlines are managed with strictly.
Examples: Automobile control system like as Anti Lock & Air Bag, Airline Control System, Diagnosis Control System,
This type of component of RTOS defines the schedule for all execution of entire tasks of process, but mostly all tasks are performed by priority system.
Synchronization Mechanism:
With using this component of RTOS, it can be handled couples of task in parallel form, and improve the performance of entire system.
Memory Management:
This component play vital role in the RTOS because this system helps for allocation the specific memory to every parts (Programs) of Real time operating system.
Function Library:
Function Library works as a communication medium in between the Kernel and application code. With the help of application code, you can fire the all request to Kernel using function library, and finally they can yield the appropriate output.
Interrupt Service Mechanism:
Interrupt Service Mechanism uses for handling a specific interrupt, which are stored in the RTOS layers.
This component of Real Time OS maintains the interval gab between all completed tasks that are detected by the operating system.
User-Defined Data Objects and Classes:
With the help of this component of Real Time OS, you can reduce the complexity of different programming languages such as C, C++, Java, and more, and it help to enhance the efficiency of entire system.
Hardware Abstraction Layer:
Hardware abstraction layer gives the all access to computer operating system for making the interaction with hardware resources at the abstract level instead of entire detail them.
Development Environment:
This component helps to develop environment between the user and hardware.
Board Support Package:
This component of Real Time OS allows to users to identify the particular drivers and routines according their selection of H/W and S/W.
Function of Real time Operating System
The prime function of RTOS provides the better management of RAM and processor as well as it gives the access to all system resources.
Real Time OS contains different many priorities with range (32-256) for executing to every task. This scheduler helps to activate such process which has high priority. If current task is executing in CPU processors ZONE, then it go to further highest priority task, and run processes.
System Clock Interrupt Routine for Time Frame:
System Clock Interrupt Routine helps to perform the highly time sensitive instructions in RTOS with using system clocks. In which, it allots the time frame for performing the specific tasks.
Deterministic Nature:
Real Time OS provides the protection in using big length tasks such as 100 to 1000, and it determines the further highest priority task then executes them without getting delay.
Synchronization and Messaging:
For making the communication medium in among of all tasks of one system to other system, RTOS use the synchronization and messaging. In which, synchronize the entire internally activities of event flag and can be sent text messages with using the mailbox, pipes and message queues.
Examples of Real Time Operating System
There are various examples of real time operating system (RTOS); below mentioned all, you can check them:
Examples / Applications are:
Internet Technology
Medical Sector
Automobile Sector such as Anti-Lock Brake and Air Bag
Traffic Control System
Complex Multimedia System
For military as a Defense system such as RADAR
Use in Stock Exchange for updating all current information
Air traffic system
Airlines reservation system
Heart Pacemaker system
Robotics areas
Cameras
Telecom Communication
Scientific experiments for Nuclear reactors
Diagnosis image system
Industrial equipments
Fuel control injection system
Government system
Home appliance such as washing machine, microwave, and more
GPOS vs RTOS
General Purpose Operating System
Real Time Operating System
GPOS uses the fair scheduling, it means GPOS’s scheduling no depends upon priority.
Kernel is non preemptive nature
Priority inversion is unnoticed.
GPOS has not predictable.
GPOS optimization works as a average case.
GPOS contains huge memory.
GPOS examples are Linux, Windows, and IOS etc.
GPOS has Random Execution Pattern.
GPOS has unpredictable Response Times.
GPOS has not Time Bound.
GPOS is used in the PC, Laptop, and Tablet.
GPOS is designed to multi user environment.
No scalable.
GPOS has high interrupt latency.
GPOS is less time sensitive.
GPOS has to secure memory modal.
RTOS uses the unfair scheduling such as its scheduling totally depends upon priority.
Kernel is preemptive nature.
Priority inversion is critical issue.
RTOS has predictable nature.
RTOS performs under worst case assumptions.
RTOS does not opt huge memory.
RTOS examples are Contiki source code, FreeRTOS etc.
RTOS has not random execution pattern.
RTOS has Predictable Response Times.
RTOS has Time Bound.
RTOS is used in the Embedded Computing system.
RTOS is designed to single user environment.
Scalable
RTOS has low interrupt latency.
RTOS is more time sensitive.
RTOS has to flat memory model.
Real Time Operating System Positive Side
RTOS produces the more accurate result while getting maximum consumption of the all using resources, so it do not contain the down time.
RTOS contains very low time frame for shifting all task in own system.
In this type of RTOS, mainly focus on their currently running part instead of waiting stages. Due to this mechanism, they produce the exact output on the behalf of their execution task.
RTOS allows the shorter ISR (Interrupt Service Routines).
Time allocation system is very excellent in RTOS.
Well designed inter task communication.
In RTOS, every task are executed according to “Priority Based Scheduling”, it means every tasks are performed in predefined time frame.
RTOS has more Maintainability & Extensibility.
RTOS works on the modularity principle, and due to that principle they help to reduce the memory wastage.
Due to modular nature, RTOS allows to modular task based testing.
RTOS coding is reusable.
RTOS is a scalable O/S.
Due to better Idle Processing system, RTOS is more reliable.
RTOS has bundle of drivers.
Well designed Power Management
RTOS allows the excellent protection.
RTOS has more speed up.
RTOS allows the MCU portability.
Real time Operating System Negative Side
Real Time OS can execute only limited task at same time frame.
Real Time OS consumes huge resources of the system, and due to this it become more expensive.
It has not capable for performing the multi tasking and multi threading for long time , so it can execute only fewer tasks.
It has poor thread priority.
Hire most experienced designer for writing their algorithms because RTOS’s algorithms are very complicated.
Require specific device drivers and interrupts signals for giving request rapidly to interrupts.
It is more costly because RTOS needs many resources for performing tasks.
Need proficient programmer for writing the piece of code to RTOS.
RTOS uses the Low Priority Tasks.
In Real Time OS, use the error handling task very difficult.
It uses the non-trivial piece of processor cycles.
RTOS can switch only fewer tasks.
Key Considerations About RTOS
It has better reliability. It means, RTOS can work in long time without any human interference.
Its result is more predictable because its every action are executed into predefined time frame.
Its performance is much better because it can perform more complex tasks without taking more workload.
All software and hardware are small size, which are used in the RTOS (Real Time Operating system). Due to this, technician does not get more headaches for finding the errors in the RTOS.
Affordable Cost
It has good stability. So due to this feature, we can upgrade or downgrade to RTOS.
Consume low memory.
RTOS has better response time for highly predictability.
Occupy less resource.
Its environment is more unpredictable.
Kernel helps for storing the states of interrupted tasks for execution at appropriate time frame.
FAQs (Frequently Asked Questions)
What is RTOS in embedded system?
RTOS (Real Time Operating System) is special operating system that offers the guarantees real time applications a specific ability along with a particular deadline. RTOSs are designed for crucial systems and devices such as microcontrollers that are timing-specific.
What is role of real time operating system?
The main role of RTOS system is to keep manage many processes at a same time; and makes ensure that these processes respond to events within a predictable time limit. RTOS is also capable to make the changes to task priority.
What is RTOS full form in embedded system?
RTOS stands for ‘Real Time Operating System’; it is special OS that is used into embedded systems.
What is the use of RTOS in embedded system?
The main use of RTOS is to execute many tasks concurrently, bringing in the basic connectivity privacy, security, and etc. as per your needs. RTOS also lets you to make an optimized solution for the particular requirements of your project.
What are the most popular examples of RTOS in embedded system?
There are many examples of RTOS system; but here some of them like as Airlines reservation system, Heart Pacemaker, Network Multimedia Systems, Robot, Airline traffic control systems, Command Control Systems, and etc.
What are different types of real-time operating systems?
There are three kinds of real-time operating systems such as Soft Real Time, Firm Real Time, Hard Real Time. Above in this post, each one is covered with its examples; you can check them.
What are the applications of real time operating system in real-life?
Internet Technology
Automobile Sector such as Anti-Lock Brake and Air Bag
Traffic Control System
Complex Multimedia System
For military as a Defense system such as RADAR
Use in Stock Exchange for updating all current information
Air traffic system
Airlines reservation system
Heart Pacemaker system
Robotics areas
What are the functions of a real time operating system?
In this article, already we have been explained above many functions of RTOS; you can check them.
Conclusion
Now, i hope that through this blog post, you have been fully educated about what is real time operating system (RTOS) with its examples and applications; involving with different types of real time operating system with ease. If this content is helpful for you, then please share it along with your friends, family members or relatives over social media platforms like as Facebook, Instagram, Linked In, Twitter, and more.
