流水灯VHDL参考模板

1、基于VHDL流水灯的设计电子信息科学与技术 刘敏 何磊 成江波一、 设计内容流水灯是一串按一定的规律像流水一样连续闪亮，流水灯控制是可编程控制器的一个应用，其控制思想在工业控制技术领域也同样适用。流水灯控制可用多种方法实现，但对现代可编程控制器而言，基于EDA技术的流水灯设计也是很普遍的。要求采用可编程逻辑器件实现一个流水灯控制电路，12个LED灯能连续发出4种不同的流水显示形式。彩灯控制器的第1种花样为彩灯按顺时针方向逐次点亮；第2种花样为彩灯按逆时针方向逐次点亮，然后全灭全亮；第3种花样为彩灯两边同时亮1、2、3、4、5、6个逐次向中间移动再散开；第4种花样为彩灯连续交叉闪烁。多个花样自动

2、变换，循环往复。二、 设计方案彩灯是由FPGA板上的LED灯代替，有以下4种闪烁效果1. 彩灯按顺时针方向逐次点亮。2. 彩灯按逆时针方向逐次点亮，然后全灭全亮。3. 彩灯两边同时亮1、2、3、4、5、6个逐次向中间移动再散开。4. 彩灯连续交叉闪烁。本控制电路采用VHDL语言设计。运用自顶而下的设计思想，按功能逐层分割实现层次化设计。根据多路彩灯控制器的设计原理，分别对应彩灯的四种变化模式、利用VHDL语言实现该功能.三、 系统框图脉冲信号顺序脉冲译码逻辑电路流水灯闪烁1 / 7四、 流水灯设计程序library IEEE;use IEEE.STD_LOGIC_1164.all;use IE

3、EE.STD_LOGIC_unsigned.all;entity led1 is port( sysclk: in std_logic; dout: out std_logic_vector(11 downto 0) );end led1;architecture jgt of led1 issignal cnt : std_logic_vector ( 7 downto 0);-variable count:integer RANGE 0 TO 7;signal count : std_logic_vector(5 DOWNTO 0); beginprocess(sysclk)begin i

4、f ( sysclk'event and sysclk = '1') thencnt <= cnt + 1;if (cnt = "11110111") thencnt <= "00000000" ;count <=count+1; end if ; end if;end process;process (count)begincase count iswhen "000000" =>dout <= "111111111110"when "000001&

5、quot; =>dout <= "111111111101"when "000010" =>dout <= "111111111011"when "000011" =>dout <= "111111110111"when "000100" =>dout <= "111111101111"when "000101" =>dout <= "111111011111&quo

6、t;when "000110" =>dout <= "111110111111"when "000111" =>dout <= "111101111111"when "001000" =>dout <= "111011111111"when "001001" =>dout <= "110111111111"when "001010" =>dout <= &q

7、uot;101111111111"when "001011" =>dout <= "011111111111"when "001100" =>dout <= "101111111111"when "001101" =>dout <= "110111111111"when "001110" =>dout <= "111011111111"when "001111"

8、; =>dout <= "111101111111"when "010000" =>dout <= "111110111111"when "010001" =>dout <= "111111011111"when "010010" =>dout <= "111111101111"when "010011" =>dout <= "111111110111"wh

9、en "010100" =>dout <= "111111111011"when "010101" =>dout <= "111111111101"when "010110" =>dout <= "111111111110"when "010111" =>dout <= "111111111111"when "011000" =>dout <= "

10、000000000000"when "011001" =>dout <= "011111111110"when "011010" =>dout <= "101111111101"when "011011" =>dout <= "110111111011"when "011100" =>dout <= "111011110111"when "011101" =&

11、gt;dout <= "111101101111"when "011110" =>dout <= "111110011111"when "011111" =>dout <= "111101101111"when "100000" =>dout <= "111011110111"when "100001" =>dout <= "110111111011"when &

12、quot;100010" =>dout <= "101111111101"when "100011" =>dout <= "011111111110"when "100100" =>dout <= "001111111100"when "100101" =>dout <= "110011110011"when "100110" =>dout <= "1111

13、00001111"when "100111" =>dout <= "110011110011"when "101000" =>dout <= "001111111100"when "101001" =>dout <= "000111111000"when "101010" =>dout <= "111000000111"when "101011" =>d

14、out <= "000111111000"when "101100" =>dout <= "000011110000"when "101101" =>dout <= "111100001111"when "101110" =>dout <= "000001100000"when "101111" =>dout <= "000000111111" when &quo

15、t;110000" =>dout <= "010101010101" when "110001" =>dout <= "101010101010" when "110010" =>dout <= "010101010101" when "110011" =>dout <= "101010101010" when "110100" =>dout <= "010

16、101010101" when "110101" =>dout <= "101010101010" when "110110" =>dout <= "010101010101" when "110111" =>dout <= "101010101010" when "111000" =>dout <= "010101010101" when "111001"

17、=>dout <= "101010101010" when "111010" =>dout <= "010101010101" when "111011" =>dout <= "101010101010" when "111100" =>dout <= "010101010101" when "111101" =>dout <= "101010101010"

18、 when "111110" =>dout <= "010101010101" when "111111" =>dout <= "101010101010" when others=>null;end case;end process;end jgt;五、 系统仿真与调试1.仿真波形图通过QuartusII软件，我们进行了仿真，其仿真波形如下图：图一:仿真波形图由设计要求可知，本设计要求采用可编程逻辑器件实现一个流水灯控制电路，12个LED灯能连续发出4种不同的流水显示形式。彩灯控制器

19、的第1种花样为彩灯按顺时针方向逐次点亮；第2种花样为彩灯按逆时针方向逐次点亮，然后全灭全亮；第3种花样为彩灯两边同时亮1、2、3、4、5、6个逐次向中间移动再散开；第4种花样为彩灯连续交叉闪烁。多个花样自动变换，循环往复。从仿真的波形可以看出，实现了相应的功能。2.电路原理图在QuartusII软件中利用硬件描述语言描述电路后，用RTL Viewers生成的对应的电路图如下所示：图二:用RTL Viewers生成的电路图六、设计总结通过本次设计明白了VHDL语言的实用性，同时对QuartusII有了进一步的了解。虽然在设计过程种遇到了许多麻烦，比如语言编写的错误，思路想法的偏离.但通过问同学，老师，以及上网了解后最终还是纠正了这些错误。不过通过不断的检查和咨询，最终还是编写成功了。也通过本次彩灯设计让我知道了日常生活种各种