流水燈VHDL參考模板

1、基于VHDL流水燈的設計電子信息科學與技術 劉敏 何磊 成江波一、 設計內(nèi)容流水燈是一串按一定的規(guī)律像流水一樣連續(xù)閃亮，流水燈控制是可編程控制器的一個應用，其控制思想在工業(yè)控制技術領域也同樣適用。流水燈控制可用多種方法實現(xiàn)，但對現(xiàn)代可編程控制器而言，基于EDA技術的流水燈設計也是很普遍的。要求采用可編程邏輯器件實現(xiàn)一個流水燈控制電路，12個LED燈能連續(xù)發(fā)出4種不同的流水顯示形式。彩燈控制器的第1種花樣為彩燈按順時針方向逐次點亮；第2種花樣為彩燈按逆時針方向逐次點亮，然后全滅全亮；第3種花樣為彩燈兩邊同時亮1、2、3、4、5、6個逐次向中間移動再散開；第4種花樣為彩燈連續(xù)交叉閃爍。多個花樣自動

2、變換，循環(huán)往復。二、 設計方案彩燈是由FPGA板上的LED燈代替，有以下4種閃爍效果1. 彩燈按順時針方向逐次點亮。2. 彩燈按逆時針方向逐次點亮，然后全滅全亮。3. 彩燈兩邊同時亮1、2、3、4、5、6個逐次向中間移動再散開。4. 彩燈連續(xù)交叉閃爍。本控制電路采用VHDL語言設計。運用自頂而下的設計思想，按功能逐層分割實現(xiàn)層次化設計。根據(jù)多路彩燈控制器的設計原理，分別對應彩燈的四種變化模式、利用VHDL語言實現(xiàn)該功能.三、 系統(tǒng)框圖脈沖信號順序脈沖譯碼邏輯電路流水燈閃爍1 / 7四、 流水燈設計程序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、 系統(tǒng)仿真與調(diào)試1.仿真波形圖通過QuartusII軟件，我們進行了仿真，其仿真波形如下圖：圖一:仿真波形圖由設計要求可知，本設計要求采用可編程邏輯器件實現(xiàn)一個流水燈控制電路，12個LED燈能連續(xù)發(fā)出4種不同的流水顯示形式。彩燈控制器

19、的第1種花樣為彩燈按順時針方向逐次點亮；第2種花樣為彩燈按逆時針方向逐次點亮，然后全滅全亮；第3種花樣為彩燈兩邊同時亮1、2、3、4、5、6個逐次向中間移動再散開；第4種花樣為彩燈連續(xù)交叉閃爍。多個花樣自動變換，循環(huán)往復。從仿真的波形可以看出，實現(xiàn)了相應的功能。2.電路原理圖在QuartusII軟件中利用硬件描述語言描述電路后，用RTL Viewers生成的對應的電路圖如下所示：圖二:用RTL Viewers生成的電路圖六、設計總結通過本次設計明白了VHDL語言的實用性，同時對QuartusII有了進一步的了解。雖然在設計過程種遇到了許多麻煩，比如語言編寫的錯誤，思路想法的偏離.但通過問同學，老師，以及上網(wǎng)了解后最終還是糾正了這些錯誤。不過通過不斷的檢查和咨詢，最終還是編寫成功了。也通過本次彩燈設計讓我知道了日常生活種各種