利用verilog语言编写的控制4个继电器开关动作的程序， 采用RS232通信-Verilog language program control the four relay switch action RS232 communication

用verilog语言编写的串口通信程序， 可以和下位机其他串口通信，控制8位继电器的开关-Using verilog language serial communication program, and slave other serial communications, control eight relay switches