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