毕业设计77北京邮电大学字系统与逻辑综合实验交通灯控制器(8)

begin if(n'event and n='1')then if(count2=99)then count2<=0; else count2<=count2+1; end if; if(count2<49)then clk1<='1'; else clk1<='0'; end if; end if; end process; clk1k<=m; clk100<=n; end; ----------------------------7 段数码管显示模块---------------------------------library ieee; use ieee.std_logic_1164.all; use ieee.std_logic_unsigned.all; entity display is port(num:in integer range 0 to 9; seg:out std_logic_vector(6 downto 0)); end; architecture a of display is-----数码管送显 begin u1:process(num) -------------7 段数码管翻译过程 begin case num is when 0=>seg<="0111111"; ------------由七位二进制数表示 0 到 9 when 1=>seg<="0000110"; when 2=>seg<="1011011"; when 3=>seg<="1001111"; when 4=>seg<="1100110"; when 5=>seg<="1101101"; when 6=>seg<="1111101"; when 7=>seg<="0000111"; when 8=>seg<="1111111"; when 9=>seg<="1101111"; when others=>seg<="XXXXXXX"; end case; end process; end;

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