用VHDL语言编写一个八位数码管显示电路，每个数码管的八个段分别连在一起，八个数码管分别由八个选通信号选择。被选通的数码管显示数据，其余关闭-With the VHDL language to write a eight digital tube display circuit, each digital tube eight segments are connected together, the eight digital tube are respectively composed of eight strobe signal selection. Was selected through the digital tube display data, the remaining closed