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 serial communications controller design, as well as non-integer divider.