基于PC的测控系统的实时性研究与开发

Research and development of the real-time ability of the measurement & control system based on PC

讨论了基于PC的测控系统实时性要求;DOS及Windows操作系统的实时性问题;Windows系统精确定时的方法。给出了基于PC实时时钟(RTC)实现1ms硬件中断的方法与程序。对Windows平台用DOS、VxD、WDM实现中断及数据交换的3方法进行了分析与比较,用VxD实现的1ms中断成功的应用在便携式铁路信号故障监测仪的软件系统中。

This paper discusseds the realtime requirement of the Measurement & Control System based on PC, the realtime ability of DOS and Windows and the method of precise timing for Windows. The method and program are given to realize interruption in 1ms using RTC of PC. Analysis and comparison are made among the three ways of realizing interruption and data exchange at the Windows by DOS,VxD and WDM,1ms interruption by VxD is successfully applied in the portable Railway Signal Failuse Monitor.