Visual Basic 编写的，为程序增加扫描功能-Written in Visual Basic, in order to increase the scanning process

用VHDL做的一个交通灯的实验，这个程序的主要功能是：有8个灯，主路和支路分别增加了转弯的灯；有救护车，当救护车按键为高电平时，产生救护车中断，主路和支路红灯亮。同时数码管在当前计数值和全0之间循环显示；有喇叭voice；-Use VHDL to do a traffic light experiment, the main functions of this program: There are eight lights, the main road and slip roads increa