现代控制和数据采集系统中通常采用多个单片机负责现场操作,而PC机功能强大、界面友好,作为系统的后台。文中介绍了基于串口通信的打印机SLEWING测试系统的设计,主要包括系统原理、系统结构、系统实现方式及其应用价值,简要介绍了SLEWING数据表、CPLD和LPC932。整个系统使用灵活方便,具有很大的实用性,对集散控制系统的设计与实现有一定的参考价值。 Modern control and data acquisition systems usually use more than one single-chip microcomputer responsible for field operations, while the PC is powerful and user-friendly as a system back-end. This paper introduces the design of SLEWING test system based on serial communication printer, including system principle, system structure, system implementation and its application value, and briefly introduces the SLEWING data sheet, CPLD and LPC932. The entire system is flexible and convenient to use, has great practicality, and has certain reference value to the design and implementation of distributed control system.