本代码是用VHDL语言全面、系统地描述UART通信协议标准，通过对UART进行数据通信的实际运用，能够较全面地理解和掌握VHDL和UART协议。-The VHDL language code is a comprehensive, systematic descr iption of UART communication protocol standards, through the UART to the practical application of data communications