由于p H值是具有非线性的特点,所以就利用AT89S51单片机来设计了一种p H值的控制器,主要功能是实现信号的采集、数据的处理、数据的显示和键盘控制等多种功能。这个控制器的软件是使用了C 51的汇编语言来进行编程相应的程序,并采用模块化的设计方式,从而实现数据的采集模块和显示模块以及键盘的扫描模块的设计。 Because p H value is non-linear, we design a p H value controller by AT89S51 singlechip. The main function is to realize many functions such as signal acquisition, data processing, data display and keyboard control . The controller’s software uses C51’s assembly language to program the program and uses a modular design approach to design the data acquisition and display modules and the keyboard’s scan module.