本程序应用VHDL语言，详细描述了RS232串口协议，包括发送，接收，波特率的产生，模块化编程，对于初学者尤为有宜！-The program in VHDL language, the detailed descr iption of the RS232 serial protocol, including sending, receiving, and baud rate generation, modular programming, especially for beginners sho