优化的μC/OS-III实时内核中断管理机制

doi:10.16180/j.cnki.issn1007-7820.2021.09.002

Abstract

Abstract:

In the μC/OS-III real-time operating system, low priority interrupt task has greater interference with the deadline of urgent tasks. In view of this problem, an optimized interrupt management mechanism of μC/OS-III is proposed. Using the principle of priority deprivation based on μC/OS-III, the priority of interrupt task and common task is assigned uniformly. According to the urgency of the interrupt, the interrupt task is assigned an appropriate priority, and different processing methods are selected by comparing the priority of the interrupt task and the current executing task. If the priority of the interrupt task is lower than the currently executing task, it will be processed in task mode, otherwise it will be processed in the interrupt service routine. Theoretical analysis and μC/Probe software testing and experiments show that the optimized μC/OS-III real-time kernel interrupt management mechanism can shorten the deadline of emergency tasks, and the system can run reliably and stably with high real-time performance.

Key words: μC/OS-III real time operating system, interrupt management, low priority interrupt, urgent task, deadline, unity distribution, μC/Probe, real time

CLC Number:

TP311

FENG Chong,WU Yaohui,WU Haozhen. Optimizing the Real-Time Kernel Interrupt Management Mechanism of μC/OS-III[J].Electronic Science and Technology, 2021, 34(9): 7-11.

Figures/Tables 8

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Optimizing the Real-Time Kernel Interrupt Management Mechanism of μC/OS-III

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