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This presentation talks about Real Time Operating Systems (RTOS). Starting with fundamental concepts of OS, this presentation deep dives into Embedded, Real Time and related aspects of an OS. Appropriate examples are referred with Linux as a case-study. Ideal for a beginner to build understanding about RTOS.
Low-cost microcontrollers are being used more and more often in embedded applications that previously may have used a microprocessor. Microcontrollers often run a real-time operating system (RTOS) rather than a full operating system like Linux. In this webinar we introduce FreeRTOS, a popular RTOS for microcontrollers that has been ported to 35 microcontroller platforms.
How to Measure RTOS Performance – Colin Walls
In the world of smart phones and tablet PCs memory might be cheap, but in the more constrained universe of deeply embedded devices, it is still a precious resource. This is one of the many reasons why most 16- and 32-bit embedded designs rely on the services of a scalable real-time operating system (RTOS). An RTOS allows product designers to focus on the added value of their solution while delegating efficient resource (memory, peripheral, etc.) management. In addition to footprint advantages, an RTOS operates with a degree of determinism that is an essential requirement for a variety of embedded applications. This paper takes a look at “typical” reported performance metrics for an RTOS in the embedded industry.
Operating system 24 mutex locks and semaphoresVaibhav Khanna
Mutual Exclusion - If process Pi is executing in its critical section, then no other processes can be executing in their critical sections
2. Progress - If no process is executing in its critical section and there exist some processes that wish to enter their critical section, then the selection of the processes that will enter the critical section next cannot be postponed indefinitely
3. Bounded Waiting - A bound must exist on the number of times that other processes are allowed to enter their critical sections after a process has made a request to enter its critical section and before that request is granted
Assume that each process executes at a nonzero speed
No assumption concerning relative speed of the n processes
This presentation talks about Real Time Operating Systems (RTOS). Starting with fundamental concepts of OS, this presentation deep dives into Embedded, Real Time and related aspects of an OS. Appropriate examples are referred with Linux as a case-study. Ideal for a beginner to build understanding about RTOS.
Low-cost microcontrollers are being used more and more often in embedded applications that previously may have used a microprocessor. Microcontrollers often run a real-time operating system (RTOS) rather than a full operating system like Linux. In this webinar we introduce FreeRTOS, a popular RTOS for microcontrollers that has been ported to 35 microcontroller platforms.
How to Measure RTOS Performance – Colin Walls
In the world of smart phones and tablet PCs memory might be cheap, but in the more constrained universe of deeply embedded devices, it is still a precious resource. This is one of the many reasons why most 16- and 32-bit embedded designs rely on the services of a scalable real-time operating system (RTOS). An RTOS allows product designers to focus on the added value of their solution while delegating efficient resource (memory, peripheral, etc.) management. In addition to footprint advantages, an RTOS operates with a degree of determinism that is an essential requirement for a variety of embedded applications. This paper takes a look at “typical” reported performance metrics for an RTOS in the embedded industry.
Operating system 24 mutex locks and semaphoresVaibhav Khanna
Mutual Exclusion - If process Pi is executing in its critical section, then no other processes can be executing in their critical sections
2. Progress - If no process is executing in its critical section and there exist some processes that wish to enter their critical section, then the selection of the processes that will enter the critical section next cannot be postponed indefinitely
3. Bounded Waiting - A bound must exist on the number of times that other processes are allowed to enter their critical sections after a process has made a request to enter its critical section and before that request is granted
Assume that each process executes at a nonzero speed
No assumption concerning relative speed of the n processes
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This is the twelfth set of slightly updated slides from a Perl programming course that I held some years ago.
I want to share it with everyone looking for intransitive Perl-knowledge.
A table of content for all presentations can be found at i-can.eu.
The source code for the examples and the presentations in ODP format are on https://github.com/kberov/PerlProgrammingCourse
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One of the key benefits of JTAG is that it provides access to the internal circuitry of a device without the need for additional hardware such as a test probe or emulator. This is possible because JTAG uses a series of test access ports (TAPs) that are built into a device's boundary-scan architecture.
This is the twelfth set of slightly updated slides from a Perl programming course that I held some years ago.
I want to share it with everyone looking for intransitive Perl-knowledge.
A table of content for all presentations can be found at i-can.eu.
The source code for the examples and the presentations in ODP format are on https://github.com/kberov/PerlProgrammingCourse
This course gets you started with writing device drivers in Linux by providing real time hardware exposure. Equip you with real-time tools, debugging techniques and industry usage in a hands-on manner. Dedicated hardware by Emertxe's device driver learning kit. Special focus on character and USB device drivers.
This presentation is a collection of available information that has been organized to fill in gaps for professionals wanting to understand the Spectre and Meltdown vulnerabilities and associated threats.
The topic focuses on different aspects of processor organization and architecture such as architecture models, register organization, instruction formats, addressing modes etc.
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Real-Time OpReal-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operating Systems Real-Time Operatingv
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Blockchain Integration: Prosigns offers comprehensive blockchain solutions, including development, integration, and consulting services, enabling businesses to leverage blockchain technology for enhanced security, transparency, and efficiency.
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However, this is neither the first nor the last activity of IntekBroker. We have compiled for you what happened in the last few days. To track such hacker activities on dark web sources like hacker forums, private Telegram channels, and other hidden platforms where cyber threats often originate, you can check SOCRadar’s Dark Web News.
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2. Introduction
A variant of OS that operates in
constrained environment in which
computer memory and processing
power is limited. Moreover they often
need to provide their services in
definite amount of time.
Hard, Soft & Firm RTOS
Example RTOS: VxWorks, pSOS,
Nucleus, RTLinux…
• Introduction
• Structure of RTOS
• Components of RTOS
• RTOS Kernel
• Tasks
• Memory
• Timers
• I/O
• IPCs
• Device Drivers
• Expectations
• Examples
3. Structure of a RTOS
Custom-Hardware
RTOS-kernel
Applications
BSP
• Introduction
• Structure of RTOS
• Components of RTOS
• RTOS Kernel
• Tasks
• Memory
• Timers
• I/O
• IPCs
• Device Drivers
• Expectations
• Examples
4. Components of RTOS
The most important
component of RTOS is its
kernel (Monolithic & Microkernel).
BSP or Board Support
Package makes an RTOS
target-specific (It’s a processor specific
code onto (processor) which we like to have our
RTOS running).
• Introduction
• Structure of RTOS
• Components of RTOS
• RTOS Kernel
• Tasks
• Memory
• Timers
• I/O
• IPCs
• Device Drivers
• Expectations
• Examples
6. RTOS KERNEL: Tasks(1)
A task is basic unit of
execution in RTOS.
RTOS scheduler needs to be
deterministic ~ O(1) or O(n).
Scheduling policies that are
available in a RTOS are:
Clock driven
Priority driven (RMS & EDF)
• Introduction
• Structure of RTOS
• Components of RTOS
• RTOS Kernel
• Tasks
• Memory
• Timers
• I/O
• IPCs
• Device Drivers
• Expectations
• Examples
15. RTOS KERNEL: Memory(4)
Participation of User space programs with kernel for
services and as a central pool of memory for
specialized applications.
Kernel Space Memory
User Space memory
P1 P2
M1 M2
• Introduction
• Structure of RTOS
• Components of RTOS
• RTOS Kernel
• Tasks
• Memory
• Timers
• I/O
• IPCs
• Device Drivers
• Expectations
• Examples
26. RTOS KERNEL:
Inter-process Communication(1)
Most of the time tasks cannot
run in isolation. They require
to talk to each other.
Synchronization, Protection
and Sharing are goals of IPC.
• Introduction
• Structure of RTOS
• Components of RTOS
• RTOS Kernel
• Tasks
• Memory
• Timers
• I/O
• IPCs
• Device Drivers
• Expectations
• Examples
31. RTOS KERNEL:
Device Drivers(3)
A host controller driver enables
system to accept a particular type of
device.
Client drivers are device specific.
Protocol layer converts device
request to form that is understood
by corresponding host controllers
through their drivers.
• Introduction
• Structure of RTOS
• Components of RTOS
• RTOS Kernel
• Tasks
• Memory
• Timers
• I/O
• IPCs
• Device Drivers
• Expectations
• Examples
32. Expectations from RTOS
Deadline-driven
Work with Dearth of Resources
Intricate I/O interfaces (Touch
panels, Push buttons …)
Fail-safe and Robust
Availability
• Introduction
• Structure of RTOS
• Components of RTOS
• RTOS Kernel
• Tasks
• Memory
• Timers
• I/O
• IPCs
• Device Drivers
• Expectations
• Examples
33. An Example RTOS
EMERALDS architecture
• Introduction
• Structure of RTOS
• Components of RTOS
• RTOS Kernel
• Tasks
• Memory
• Timers
• I/O
• IPCs
• Device Drivers
• Expectations
• Examples
34. Relevant books and
websites
http://www.intelinfo.com/it_training_materials_and_books/free_real_time_
operating_systems_training_materials.html
Linux Device Drivers – Alexander Rubini, Oreilly publications
http://www.ddjembedded.com : Dr. Dobb’s Journal
http://www.embedded.com
Some RTOS based Embedded Systems
http://www.ll.mit.edu/HPEC/agendas/proc02/abstracts/ahlander.pdf
http://www.cs.berkeley.edu/~culler/cs294-f03/papers/emeralds.pdf