文档包含8255A控制交通灯的应用系统设计的软硬件设计方案，PDF格式-8255A document contains the application of traffic signal control system design of hardware and software design, PDF format

微机原理与接口技术，基于硬件环境下的一些应用，包括8255a等芯片的使用和实现一些功能。-Microcomputer Principle and Interface Technology, hardware-based environment, some of the applications, including the use of chips 8255a and implementation of other features.