北邮数电实验双色点阵扫描显示控制器

北京邮电大学数字电路与逻辑设计实验报告（实验5）学院：电子工程学院专业：电子信息科学与技术

实验5双色点阵扫描显示控制器一、实验要求1.用8×8点阵显示字符，每次显示一个字符，每秒切换一次，显示内容为“B”、“U”、“P”、“T”及姓名的第一个字母。如张三显示的内容为“B”、“U”、“P”、“T”、“Z”、“S”。2.为系统设置一个复位键，复位后重新从“B”开始循环显示。要求使用按键复位。二、实验设计思路我们知道点阵的结构，当row轮流出0的时候，二极管阴极为低电平，这时候我们给到一个高电平在红灯或者绿灯的阳极的时候，就能驱使灯点亮。这样我们可以基于“视觉暂留”的现象，快速刷新row灯，使得点阵能够快速点亮，这样就能显示一个完整的字，最后再利用一个模7计数器来实现每个字母之间的转换。我们引入一个1000hz的时钟，并对其进行一个1000分频变成1hz的时钟。之后再利用这个模7计数器来控制cor_l和cor_g和row来控制灯的颜色、每行灯亮时列的亮灯情况。另外，我们需要一个模8计数器，后面再设计一个3-8线译码器，这样能够控制row的亮灯情况。最后我们需要注意的是，由于row需要快速刷新，故我们需要用1000hz的时钟，而字符之间的转换的计数器要用1hz的时钟，来满足亮灯1s的条件。我们还需要设计一个复位键，以便能做到按下按钮重新回到第一个字母的功能，这需要reset按下时，模7计数器的数字回到0。这样把带防抖的复位键加进去即可。最后顶层将这两个模块连接起来即可。三、VHDL代码及注释点阵部分：libraryIEEE;useIEEE.std_logic_1164.all;useIEEE.std_logic_unsigned.all;useIEEE.std_logic_arith.all;entitydianzhenisport(clk:instd_logic;col_r:outstd_logic_vector(7downto0);--红灯的控制显示col_g:outstd_logic_vector(7downto0);--绿灯的控制显示row:outstd_logic_vector(7downto0);--二极管阴极控制reset:instd_logic);enddianzhen;architectureaofdianzhenissignalsel7:std_logic_vector(2downto0);--模7计数器的信号signalsel8:std_logic_vector(2downto0);--模8计数器的信号signalclk_add:std_logic:='0';--分频后的时钟beginp1:process(clk)--1000分频variablec:integerrange0to499:=0;beginif(clk'eventandclk='1')thenifc=499thenclk_add<=notclk_add;c:=0;elsec:=c+1;endif;endif;endprocessp1;p2:process(clk)--模8计数器beginif(clk'eventandclk='1')thensel8<=sel8+1;--加满自动重新归零endif;endprocessp2;p3:process(clk_add,reset)--模7计数器beginif(reset='1')then--当出现重置的信号为高电平时，计数器重置为000，这样就能回到字母Bsel7<="000";elsif(CLK_add'EVENTANDCLK_add='1')thenif(sel7=O"6")thensel7<=O"0";--模满7归零elsesel7<=sel7+1;endif;endif;endprocessp3;p4:process(sel7,sel8)—模7和模8共同作用，模8用来快速刷新row，模7用来控制哪个字母，每行对应相对的列点亮的情况，显示字母。begincasesel7iswhenO"0"=>casesel8is--字母B，运用循环嵌套，如7是显示B的最上面一行，0是显示最下面一行左下角灯为（0,0）,右上角为（7，7），这样的方式点亮灯显示字符。whenO"7"=>col_r<="00111110";col_g<="00000000";row<="01111111"whenO"6"=>col_r<="01000110";col_g<="00000000";row<="10111111";whenO"5"=>col_r<="01000110";col_g<="00000000";row<="11011111";whenO"4"=>col_r<="00111110";col_g<="00000000";row<="11101111";whenO"3"=>col_r<="01000110";col_g<="00000000";row<="11110111";whenO"2"=>col_r<="01000110";col_g<="00000000";row<="11111011";whenO"1"=>col_r<="01000110";col_g<="00000000";row<="11111101";whenO"0"=>col_r<="00111110";col_g<="00000000";row<="11111110";whenOTHERS=>col_r<="00111110";col_g<="00000000";row<="11111110";endcase;whenO"1"=>casesel8is--字母UwhenO"7"=>col_r<="00000000";col_g<="11000110";row<="01111111";whenO"6"=>col_r<="00000000";col_g<="11000110";row<="10111111";whenO"5"=>col_r<="00000000";col_g<="11000110";row<="11011111";whenO"4"=>col_r<="00000000";col_g<="11000110";row<="11101111";whenO"3"=>col_r<="00000000";col_g<="11000110";row<="11110111";whenO"2"=>col_r<="00000000";col_g<="11000110";row<="11111011";whenO"1"=>col_r<="00000000";col_g<="11111110";row<="11111101";whenO"0"=>col_r<="00000000";col_g<="01111100";row<="11111110";whenOTHERS=>col_r<="00000000";col_g<="01111100";row<="11111110";endcase;whenO"2"=>casesel8is--字母PwhenO"7"=>col_r<="00111110";col_g<="00000000";row<="01111111";whenO"6"=>col_r<="01000110";col_g<="00000000";row<="10111111";whenO"5"=>col_r<="01000110";col_g<="00000000";row<="11011111";whenO"4"=>col_r<="01000110";col_g<="00000000";row<="11101111";whenO"3"=>col_r<="00111110";col_g<="00000000";row<="11110111";whenO"2"=>col_r<="00000110";col_g<="00000000";row<="11111011";whenO"1"=>col_r<="00000110";col_g<="00000000";row<="11111101";whenO"0"=>col_r<="00000110";col_g<="00000000";row<="11111110";whenOTHERS=>col_r<="00000110";col_g<="00000000";row<="11111110";endcase;whenO"3"=>casesel8is--字母TwhenO"7"=>col_r<="00000000";col_g<="11111111";row<="01111111";whenO"6"=>col_r<="00000000";col_g<="11111111";row<="10111111";whenO"5"=>col_r<="00000000";col_g<="00011000";row<="11011111";whenO"4"=>col_r<="00000000";col_g<="00011000";row<="11101111";whenO"3"=>col_r<="00000000";col_g<="00011000";row<="11110111";whenO"2"=>col_r<="00000000";col_g<="00011000";row<="11111011";whenO"1"=>col_r<="00000000";col_g<="00011000";row<="11111101";whenO"0"=>col_r<="00000000";col_g<="00011000";row<="11111110";whenOTHERS=>col_r<="00000000";col_g<="00011000";row<="11111110";endcase;whenO"4"=>casesel8is--字母ZwhenO"7"=>col_r<="11111111";col_g<="00000000";row<="01111111";whenO"6"=>col_r<="01000000";col_g<="00000000";row<="10111111";whenO"5"=>col_r<="00100000";col_g<="00000000";row<="11011111";whenO"4"=>col_r<="00010000";col_g<="00000000";row<="11101111";whenO"3"=>col_r<="00001000";col_g<="00000000";row<="11110111";whenO"2"=>col_r<="00000100";col_g<="00000000";row<="11111011";whenO"1"=>col_r<="00000010";col_g<="00000000";row<="11111101";whenO"0"=>col_r<="11111111";col_g<="00000000";row<="11111110";whenOTHERS=>col_r<="11111111";col_g<="00000000";row<="11111110";endcase;whenO"5"=>casesel8is--字母YwhenO"7"=>col_r<="00000000";col_g<="11000011";row<="01111111";whenO"6"=>col_r<="00000000";col_g<="01100110";row<="10111111";whenO"5"=>col_r<="00000000";col_g<="00111100";row<="11011111";whenO"4"=>col_r<="00000000";col_g<="00011000";row<="11101111";whenO"3"=>col_r<="00000000";col_g<="00011000";row<="11110111";whenO"2"=>col_r<="00000000";col_g<="00011000";row<="11111011";whenO"1"=>col_r<="00000000";col_g<="00011000";row<="11111101";whenO"0"=>col_r<="00000000";col_g<="00011000";row<="11111110";whenOTHERS=>col_r<="00000000";col_g<="00011000";row<="11111110";endcase;whenO"6"=>casesel8is--字母RwhenO"7"=>col_r<="00111110";col_g<="00000000";row<="01111111";whenO"6"=>col_r<="01000110";col_g<="00000000";row<="10111111";whenO"5"=>col_r<="01000110";col_g<="00000000";row<="11011111";whenO"4"=>col_r<="00111110";col_g<="00000000";row<="11101111";whenO"3"=>col_r<="01000110";col_g<="00000000";row<="11110111";whenO"2"=>col_r<="10000110";col_g<="00000000";row<="11111011";whenO"1"=>col_r<="10000110";col_g<="00000000";row<="11111101";whenO"0"=>col_r<="00000000";col_g<="00000000";row<="11111110";whenOTHERS=>col_r<="00000000";col_g<="00000000";row<="11111110";endcase;WHENOTHERS=>NULL;--其他状态endcase;endprocessp4;enda;第二部分：防抖按钮。这部分和之前的实验相仿。直接套用即可。LIBRARYIEEE;USEIEEE.STD_LOGIC_1164.ALL;ENTITYfangdouIS PORT( clk :IN STD_LOGIC; reset :IN STD_LOGIC; resetn :OUT STD_LOGIC);ENDfan