摘要
当在计算机应用系统中使用电平触发申请方式的硬件中断时,要特别注意考虑解决在中断源申请一次中断并在CPU已响应此次中断后如何撤消中断请求的问题,及如何避免“一次请求,多次中断”的现象发生。通过对硬中断过程的分析,给出了解决该问题的方法并说明了每种方法的特点。
When hardware interrupts are used under level trigger manner, there is a very important problem needed to be resolved, which are how to withdraw IRQ （Interrupt Request） after it has requested a time interrupt and CPU has also responded to it, and how to avoid the phenomena of a time requisition, time after time interrupts. Through analyzing the process of hardware interrupt, three methods for resolving the problem were presented, and characteristics of each method were explained.
出处
《计算机工程与设计》
CSCD
北大核心
2006年第2期214-215,共2页
Computer Engineering and Design
基金
国家自然科学基金项目(50475109)
关键词
硬中断
中断请求
电平触发方式
中断响应
hardware interrupt
IRQ
level trigger manner
interrupt response
