此为交通信号机，上位机方案读写软件，能够完成4相位40步伐的灯色方案设置和读写-for traffic signals this machine, PC software program to read and write, to complete the four-phase 40 of lights pace color settings and literacy programs

交通灯分为X组和Y组，每组包括了2位倒计时数码管和红黄绿三色LED信号灯（每组包括﹢、-两小组，显示内容一样），考虑到应用需求，要求芯片可通过I2C接口连接到上位机，以调节内部控制寄存器,此为Verilog代码，包含led、seg、timer等模块。-Traffic lights are divided into groups X and Y groups, each including two digital countdown yellow-green and red LED lights