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Research of Exception Handler Mechanism for Embedded System Based on ARM

Yangming Li

Open publisher page 1 citations

Abstract

Real-time embedded system required CPU to support multitasks and respond to interrupt exceptions quickly.ARM processors did well in supporting real time multi tasks,but the principle of exception processing was so complex that whole efficiency was low.The mechanism in which ARM processor responded to sorts of exceptions was analyzed,and functions of __irq was also introduced.Then the way in which reentrant interrupt service program should be designed had been discussed on basis of(μC/OS__II) system.At last the sequence how reentrant interrupt service works was optimized based on characteristics of μC/OSII and the optimized scheme was put up in detail.

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What this paper is about

Real-time embedded system required CPU to support multitasks and respond to interrupt exceptions quickly.ARM processors did well in supporting real time multi tasks,but the principle of exception processing was so complex that whole efficiency was low.The mechanism in which ARM processor responded to sorts of exceptions was analyzed,and functions of __irq was also introduced.Then the way in which reentrant interrupt service program should be designed had been discussed on basis of(μC/OS__II) system.At last the sequence how reentrant interrupt service works was optimized based on characteristics of μC/OSII and the optimized scheme was put up in detail.

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Available abstract

Real-time embedded system required CPU to support multitasks and respond to interrupt exceptions quickly.ARM processors did well in supporting real time multi tasks,but the principle of exception processing was so complex that whole efficiency was low.The mechanism in which ARM processor responded to sorts of exceptions was analyzed,and functions of __irq was also introduced.Then the way in which reentrant interrupt service program should be designed had been discussed on basis of(μC/OS__II) system.At last the sequence how reentrant interrupt service works was optimized based on characteristics of μC/OSII and the optimized scheme was put up in detail.

Key concepts: Interrupt, Reentrancy, Computer science, Operating system, Embedded system, Interrupt handler, ARM architecture, Exception handling

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