VHDL语言 八段七段数码管轮流显示0-9，不用3-8译码器

可以使用一个计数器和一个数码管驱动器来实现八段七段数码管轮流显示0-9，不需要3-8译码器。具体实现可以使用VHDL语言编写一个计数器模块和一个数码管驱动器模块，然后将它们连接起来。在计数器模块中，可以使用一个计数器来计数0-9，然后将计数器的输出作为数码管驱动器的输入，控制数码管显示相应的数字。

相关问题

VHDL八位七段数码管轮流显示0到9

非常感谢您的提问！以下是VHDL八位七段数码管轮流显示0到9的代码：

library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;

entity eight_digit_display is
    Port ( clk : in  STD_LOGIC;
           reset : in  STD_LOGIC;
           data : in  STD_LOGIC_VECTOR (3 downto 0);
           seg : out  STD_LOGIC_VECTOR (6 downto 0);
           an : out  STD_LOGIC_VECTOR (7 downto 0));
end eight_digit_display;

architecture Behavioral of eight_digit_display is

    signal count : integer range 0 to 7 := 0;
    signal display : STD_LOGIC_VECTOR (3 downto 0) := "0000";
    signal an_count : integer range 0 to 7 := 0;

begin

    process (clk, reset)
    begin
        if reset = '1' then
            count <= 0;
            display <= "0000";
            an_count <= 0;
        elsif rising_edge(clk) then
            if count = 7 then
                count <= 0;
            else
                count <= count + 1;
            end if;
            case count is
                when 0 => display <= "0000";
                when 1 => display <= "0001";
                when 2 => display <= "0010";
                when 3 => display <= "0011";
                when 4 => display <= "0100";
                when 5 => display <= "0101";
                when 6 => display <= "0110";
                when 7 => display <= "0111";
            end case;
            if an_count = 7 then
                an_count <= 0;
            else
                an_count <= an_count + 1;
            end if;
        end if;
    end process;

    process (display, an_count)
    begin
        case an_count is
            when 0 => an <= "11111110";
            when 1 => an <= "11111101";
            when 2 => an <= "11111011";
            when 3 => an <= "11110111";
            when 4 => an <= "11101111";
            when 5 => an <= "11011111";
            when 6 => an <= "10111111";
            when 7 => an <= "01111111";
        end case;
        case display is
            when "0000" => seg <= "0000001"; -- 0
            when "0001" => seg <= "1001111"; -- 1
            when "0010" => seg <= "0010010"; -- 2
            when "0011" => seg <= "0000110"; -- 3
            when "0100" => seg <= "1001100"; -- 4
            when "0101" => seg <= "0100100"; -- 5
            when "0110" => seg <= "0100000"; -- 6
            when "0111" => seg <= "0001111"; -- 7
            when "1000" => seg <= "0000000"; -- 8
            when "1001" => seg <= "0000100"; -- 9
            when others => seg <= "1111111"; -- off
        end case;
    end process;

end Behavioral;

希望这个代码对您有所帮助！

使用vhdl语言设计七段数码管译码电路

VHDL是一种用于描述数字系统行为的高级硬件描述语言，可以用来设计像七段数码管译码电路这样的电子系统。在VHDL中设计七段数码管译码器通常涉及以下几个步骤：

1. 定义接口：首先，你需要声明输入信号，如数据输入（通常是一个二进制数表示的7位信息），以及控制输入（比如显示选通信号）。此外，还要定义输出接口，即对应每个数码管的亮灭状态。

signal data : std_logic_vector(6 downto 0); -- 7位数据输入
signal enable : std_logic; -- 控制信号
signal segments : std_logic_vector(6 downto 0); -- 7位数码管输出

2. 创建结构体或进程：定义一个实体（entity）来描述译码器的行为，并在过程中实现译码逻辑。例如，你可以使用case结构根据输入数据选择相应的数码管段。

entity seven_segment_decoder is
   Port (
      Data : in std_logic_vector(6 downto 0);
      Enable : in std_logic;
      Segments : out std_logic_vector(6 downto 0)
   );
end seven_segment_decoder;

architecture Behavioral of seven_segment_decoder is
begin
   Decode过程: process(Data, Enable)
   begin
      if Enable = '1' then
         Segments <= BINARY_TO_STD_LOGIC_VECTOR(Translation_Table(Data)); -- Translation_Table是预先定义好的映射表
      else
         Segments <= (others => '0');
      end if;
   end process Decode;
end Behavioral;

3. 编写映射表：创建一个查找表，将输入的数据二进制表示映射到对应的数码管段亮暗状态。

4. 测试：编写测试bench文件，通过仿真验证译码器是否按照预期工作。