'Interrupt occurs' presentation slideshows

Digital Control S ec # 1

Digital Control S ec # 1. 1.4 What is polling in software? Polling is the software technique where we keep waiting until a certain event occurs, and then perform the required actions. Describe how a control algorithm can be synchronized using Polling.

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Callback

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Embedded Systems 7763B

Embedded Systems 7763B. Mt Druitt College of TAFE Electrical Engineering Lesson 4 Interrupts, The Stack. Interrupts [1]. Interrupts are external or internal asynchronous hardware events that cause the microcontroller to branch away from the normal program flow to answer an immediate need

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Interrupt driven I/O

Interrupt driven I/O. MIPS RISC Exception Mechanism. The processor operates in user mode kernel mode Access to additional set of registers and to user-mode restricted memory space available when the processor operates in kernel mode .

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Sequential Execution

Sequential Execution. Normally, CPU sequentially executes instructions in a program Subroutine calls are synchronous to the execution of the main program. Main program. RCALL. RET. subroutine. Consider a program that uses a subroutine to retrieve the status of a pushbutton.

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Interrupts

Interrupts. An interrupt is an exception, a change of the normal progression, or interruption in the normal flow of program execution. An interrupt is essentially a hardware generated function call. Interrupts are caused by both internal and external sources.

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OPERATING SYSTEMS DESIGN AND IMPLEMENTATION Third Edition ANDREW S. TANENBAUM ALBERT S. WOODHULL

OPERATING SYSTEMS DESIGN AND IMPLEMENTATION Third Edition ANDREW S. TANENBAUM ALBERT S. WOODHULL. Chap. 2.3. Classical IPC Problems Chap. 2.4. Scheduling. Lecture 6, 22 October 2013. Annotated by B. Hirsbrunner , University of Fribourg, 2012. The Dining Philosophers Problem (1).

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Callback

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The Stack

The Stack. This is a special data structure: The first item to be placed into the stack will be the last item taken out. Two basic operations: Push: Places items on the stack New items will be placed on top of old ones. Pop: Removes items from the stack.

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Round Robin

Round Robin A straightforward way to reduce the penalty that short jobs suffer with FCFS is to use preemption based on a clock. The simplest such policy is round robin. A clock interrupt is generated at periodic intervals.

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