防止电平触发方式下发生不必要中断的方法  

Methods for preventing needless interrupts under level trigger request manner

作　　者：米根锁[1] 

机构地区：[1]兰州交通大学信息与电气工程学院,甘肃兰州730070

出　　处：《计算机工程与设计》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)

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.

关 键 词：硬中断 中断请求 电平触发方式 中断响应 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]