用if语句完成带使能端的BCD-七段字形显示器的VHDL程序,并进行波形仿真。
时间: 2024-05-07 22:23:58 浏览: 16
这是一个技术问题,可以回答。以下是VHDL程序的基本框架:
```vhdl
entity bcd_7seg is
Port ( ena : in std_logic;
bcd : in std_logic_vector(3 downto 0);
seg : out std_logic_vector(6 downto 0)
);
end bcd_7seg;
architecture Behavioral of bcd_7seg is
begin
process(bcd)
begin
if ena = '1' then
case bcd is
when "0000" => seg <= "0000001";
when "0001" => seg <= "1001111";
when "0010" => seg <= "0010010";
when "0011" => seg <= "0000110";
when "0100" => seg <= "1001100";
when "0101" => seg <= "0100100";
when "0110" => seg <= "0100000";
when "0111" => seg <= "0001111";
when "1000" => seg <= "0000000";
when "1001" => seg <= "0000100";
when others => seg <= "1111111";
end case;
else
seg <= "1111111";
end if;
end process;
end Behavioral;
```
其中,ena是使能端,bcd是四位BCD码输入,seg是七位数码管输出。对于未知的BCD码,seg输出全1,表示无效数据。使用仿真软件,可以生成波形仿真结果。
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