EDA16x16点阵滚动+动画显示.doc

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1、四、课程设计的总体步骤1、单个字符的显示（如：黄）：library ieee;use ieee.std_logic_1164.all;use ieee.std_logic_unsigned.all;entity xianshi isport( clk2:in std_logic;rck,sck:out std_logic;si:out std_logic);end ;architecture one of xianshi issignal sel:std_logic_vector(3 downto 0);signal q: std_logic_vector(31 downto 0);signa

2、l i:integer range 0 to 31;signal coi:std_logic;begin process(sel,clk1)begincase sel is when0000=qqqqqqqqqqqqqqqqnull; end case; if clk1event and clk1=1then si=q(i);i=i+1;coi=0; if i=31 then i=0;coi=1;sel=sel+1; end if; rck=not coi; end if;end process;sck=clk1;end ;时序仿真：从图中可以看出，当clk1在第32个上升沿rck变为低电频，

3、sck与clk1是同一电频，故此程序满足要求。 2、多个字符的跳动显示（如：黄小红）：library ieee;use ieee.std_logic_1164.all;use ieee.std_logic_unsigned.all;entity xianshi isport( clk1:in std_logic;clk2:in std_logic;rck,sck:out std_logic;si:out std_logic);end ;architecture one of xianshi issignal lie:std_logic_vector(3 downto 0);signal sel

4、:std_logic_vector(3 downto 0);signal q: std_logic_vector(31 downto 0);signal i:integer range 0 to 31;signal coi:std_logic;begin process(sel,clk1,clk2)beginif clk2event and clk2=1 then lie case sel is when0000=qqqqqqqqqqqqqqqqnull; end case; when0001= case sel is when0000=qqqqqqqqqqqqqqqqnull; end ca

5、se; when0010= case sel is when0000=qqqqqqqqqqqqqqqqnull; end case; when others=null; end case; if clk1event and clk1=1then si=q(i);i=i+1;coi=0; if i=31 then i=0;coi=1;sel=sel+1; end if; rck=not coi; end if;end process;sck=clk1;end ; 时序仿真：从上图看出，当clk1在第32个上升沿rck变为低电频，sck与clk1是同一电频，故此程序满足要求。3、汉字的滚动和动画显

6、示（如：黄小红+笑脸）：library ieee;use ieee.std_logic_1164.all;use ieee.std_logic_unsigned.all;entity xianshi isport( clk1:in std_logic;clk2:in std_logic;rck,sck:out std_logic;si:out std_logic);end ;architecture one of xianshi issignal lie:std_logic_vector(3 downto 0);signal sel:std_logic_vector(3 downto 0);s

7、ignal q: std_logic_vector(31 downto 0);signal i:integer range 0 to 31;signal coi:std_logic;begin process(sel,clk1,clk2)beginif clk2event and clk2=1 then lie case sel is when0000=qqqqqqqqqqqqqqqqnull; end case; when0001= case sel is when0000=qqqqqqqqqqqqqqqqnull; end case; when0010= case sel is when0

8、000=qqqqqqqqqqqqqqqqnull; end case; when0011= case sel is when0000=qqqqqqqqqqqqqqqqnull; end case; when0100= case sel is when0000=qqqqqqqqqqqqqqqqnull; end case; when0101= case sel is when0000=qqqqqqqqqqqqqqqqnull; end case; when0110= case sel is when0000=qqqqqqqqqqqqqqqnull; end case; when0111= case sel is when0000=qqqqqqqqqqqqqqqqnull; end case; when1000= case sel is when0000=qqqqqqqq=000000000