基于S3C2440与WinCE平台上的FIQ驱动程序的实现

Realization of driver using FIQ based on S3C2440 and WinCE embedded system

在简述WinCE系统中普通IRQ中断处理过程的基础上,针对采用普通IRQ中断的驱动程序实时性能不高的问题,提出使用ARM处理器的FIQ中断在实时性能要求较高的场合中的应用方法。系统硬件部分使用ARM S3C2440处理器作为主控部分,软件部分开发出WinCE5.0操作系统下使用FIQ中断针对步进电机驱动器的驱动程序。实践证明,驱动程序使用FIQ中断是稳定的且能获得比IRQ中断更好的实时性能。

Based on the brief introduction of general IRQ interrupt processing in WinCE system and the less real-time performance of the driver used IRQ interrupt, this paper put forward the method of using FIQ interrupt of ARM processor to achieve higher performance requirements in real time applications. The system uses ARM $3C2440 processor as the main control unit. The driver use FIQ interrupt for stepping motor driver was developed under the WinCE5.0 operating system. Practice has proved that the driver using the FIQ interrupt is stable and can obtain better performance than using IRQ interrupt.