API的串口通讯程序，可设置为数据发送或者字符发送，可设置自动发送；接收可以为数据也可以为字符方式，有实时的错误报告。-API serial communication procedures, data can be set to send or characters sent, can be set to automatically send; to receive data can also character, a real-time error reporting.

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