键盘及转轴编码器与Intel 8279的接口设计

The Design of the Interfaces Between Intel 8279 and Rotating Shaft Encoder and Keyboard

深入浅出地介绍了转轴编码器的工作原理，从硬件连接和软件设计两个方面分别介绍了编码器的接口电路、８２７９芯片编方式的选择考虑及编码器顺、逆方面旋转时的识别和取值程序。

The operational principle of the rotating shaft encoder is presented in the way for easy understanding. From the hardware con- nection and software design the interfacing circuit of the encoder, the consideration of selecting the programming method of 8279 chip and the recognifion of the + /- rotating direction of the encoder as well as the value collecting program are introduced.