摘要
以一个简易的低频虚拟信号发生器设计为例,介绍了PC机并行口的工作模式,阐述了在保护的Windows操作系统下对硬件的访问方法、信号的产生方法及其最高频率的限制条件。说明了操作系统任务调度对信号波形的影响。
The design process of a simple low-frequency virtual signal generator （VSG） based on PC was discussed; the parallel port types and some interfacing tips, hardware access techniques under Windows OS, and signal generating method were described. Some constraints on maximum signal frequency and the effect of OS scheduling on signal quality were analyzed.
出处
《机床与液压》
北大核心
2007年第7期48-50,54,共4页
Machine Tool & Hydraulics
关键词
虚拟信号发生器
硬件访问技术
程序设计
Virtual signal generator
Hardware access technology
Programming design
