VHDL代码，共10个程序，分别是1分频器2状态机3计数器4拨码开关对应数码管显示5键盘及显示6键盘显示7交通灯8汉字滚动9ADC0804直流采样和显示10正弦波发生器(A total of 10 procedures, namely, 1 frequency dividers, 2 state machines, 3 counters, 4 dial switches, corresponding to digital tube display 5 keyboard and display 6