【摘要】 嵌入式系统设计要求处理器能够快速的响应系统中的异常中断。以ARM920T为内核的S3C2410芯片作为硬件平台,通过设计键盘控制这个实例,提出一种通过两次查询异常中断向量表来实现IRQ异常中断的方法,并论述了这种中断的响应,调用以及返回过程。以此为基础,分析了ARM9内核在出现中断请求时的中断响应过程和编程机制,从而为嵌入式中断编程的学习和开发提供一个有效的解决方案。更多还原

【Abstract】 To design an embedded system,it is required the processor to respond the IRQ quickly. By using the S3C2410 as the hardware platform whose core is ARM920T. An IRQ exceptional interrupt program based on key interrupt is designed by searching the interrupt vector twice,the progress of response,calling and return of this kind of interrupt are discussed. And then,based on it,the interrupt response process and programming mechanism on ARM9 when the interrupt response at the request is analyzed. An effective solution is provided to study and develop the interrupt programming in embedded system.更多还原