论文部分内容阅读
随着嵌入式系统的飞速发展,嵌入式PC得到了广泛应用。标准的PC键盘由于体积大,按键多等原因在多数情况下不能满足要求。本文在介绍PS/2通信协议的基础上,利用AT89C52实现了一种PC非标准键盘的设计。给出了其完整的硬件实现电路图和主要的软件开发方法。该键盘具有结构简单、工作稳定、便于扩展等特点,并已在某型航空图像回传系统中得到具体应用。
With the rapid development of embedded systems, embedded PC has been widely used. Standard PC keyboard due to bulky, multi-button and other reasons in most cases can not meet the requirements. This paper introduces the PS / 2 communication protocol, based on the use of AT89C52 to achieve a PC non-standard keyboard design. Given its complete hardware implementation of the circuit diagram and the main software development methods. The keyboard has the characteristics of simple structure, stable operation and easy expansion, and has been specifically applied in a certain type of aerial image return system.