本文介绍了在数据采集系统中采用 8279键盘/显示接口芯片和CE-515P打印机作为其输入、输出的设计方法。用户可以很方便地通过键盘设定采集通道号、巡回采集次数(下称采集状态字)、采集点数、采集幅度和打印曲线时纵向放大或缩小的比例系数(下称比例系数)等参数。一、系统的要求本数据采集系统的功能是完成4路信号的采集,采集的数据经处理后,显示结果并去控制执行机构。 (一)采集参数的设定采集点数、幅度、状态字和比例系数等参数的设定由键盘输入,要求能随时更新。一旦采集点数、采集幅 This article describes the data acquisition system using 8279 keyboard / display interface chip and CE-515P printer as its input and output design. Users can easily set parameters such as the channel number, the number of acquisition cycles (hereinafter acquisition status word), the collection points, the acquisition rate and the scale factor (hereinafter, the scale factor) vertically enlarged or reduced by the keyboard. First, the system requirements The function of the data acquisition system is to complete the acquisition of 4 signals, the collected data processed, the results and to control the implementing agencies. (A) collection of parameters set Collection point, amplitude, status word and the proportion of parameters and other parameters set by the keyboard input, the request can be updated at any time. Once the points are collected, collect the pieces