摘要
已成为PC标准的通用串行总线USB(UniversalSerialBus)为多点数据采集提供了很大的便利。概括了USB的特点,详细介绍了一种基于USB的数据采集系统,该系统利用单片机的I/O口经过三级驱动扩展,每级通过了译码产生所需要的信号,利用单片机控制USB芯片,很好地完成了448路开关量和16路模拟量的数据采集。
PC standard USB ( Universal Serial Bus ) supplies advantages for multi-access data collec-tion.The specialties of USB are summarized and a data collection system based on it is introducd ,which uses the I/O ports of single-chip microprocessor and generates needed signals via3-step driving expansion and de-coding.The data from448binary channels and16analog channels are successfully collected using USB under control of single-chip microprocessor.
出处
《电力自动化设备》
EI
CSCD
北大核心
2004年第3期63-65,共3页
Electric Power Automation Equipment
