串行异步收发接口，简称UART，是一种广泛应用的串行传输接口。这是用vhdl实现的程序，将UART分成相应的几个模块，并用顶层文件进行模块化设计。-Send and receive asynchronous serial interface, referred to as the UART, is a widely used serial transmission interface. This is achieved using vhdl procedure to the appropriat