本程序是用VHDL语言，非整数分频的一个实现， fenpin.vhd为主程序-this procedure is used VHDL, non-integer frequency of a realization of the main procedures fenpin.vhd

可以对增量式编码器输出的AB相信号进行整数分频。有一个简单的通讯接口，可设定分频大小。 -Incremental encoder can output an integer number for AB believe frequency. There is a simple communication interface, can set the size frequency.

用VHDL实现的异步通讯模拟程序和报告。分为控制器，接收器，发射器三部分，其中应用到了异步串行通讯控制器的设计以及非整数分频器的设计。-Asynchronous communication using VHDL simulation procedures and reporting. Divided into the controller, receiver, transmitter three parts, which applied to the design of asynchronous