temp.vhd.bak

完整的4*4键盘程序

library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
use ieee.std_logic_arith.all;
entity temp is
   port( 
         p : out std_logic;
         reset: in std_logic;
         inclk : in std_logic;
         inkey : in std_logic_vector(3 downto 0);
         outkey : out std_logic_vector(3 downto 0);
         outled : out std_logic_vector(6 downto 0));
  end temp;
architecture art of temp is
 component yanshi                  --例化延时去抖动模块
    port( 
          reset : in std_logic;
          clk,a : in std_logic;
          b  : out std_logic);
   end component;
  signal keyclk : std_logic_vector(17 downto 0);
  signal chuclk : std_logic_vector(3 downto 0);
  signal keyclkout ,chuclkout : std_logic;
  signal chuout : std_logic_vector(3 downto 0);
  signal inkeymap : std_logic_vector(3 downto 0);
  signal keyout : std_logic_vector(7 downto 0);
  signal bb : std_logic_vector(1 downto 0);
  begin
 roll: for i in 0 to 3 generate
       movskipx : yanshi port map(reset,inkey(i),keyclkout,inkeymap(i));
          end generate;
  clk_key: process(inclk)    --例化用到的时钟信号50MS
         begin
            if(inclk ' event and inclk = '1') then
                  if(keyclk=250000) then
                      keyclk<="000000000000000000";
                      keyclkout<= not keyclkout;
                     else
                      keyclk<=keyclk+1;
                    end if;
               end if;
            end process clk_key;
  clk_chu: process(keyclkout)    -- 10分频后送到列扫描时钟5ms
        begin
          if(keyclkout 'event and keyclkout='1') then
             if(chuclk = 9) then
                 chuclk<="0000";
                 chuclkout <= not chuclkout ;
              else
                 chuclk<=chuclk+1;
              end if;
           end if;
         end process clk_chu;
 clk_chu_out: process(reset,chuclkout)
     begin
         if(reset='0') then
             bb<="00";
            elsif(chuclkout 'event and chuclkout = '1')then
                 if(bb="11")then
                     bb<="00";
                   else bb<=bb+1;
                  end if;
               case bb is
                  when "00"=>chuout<="1110";
                  when "01"=>chuout<="1101";
                  when "10"=>chuout<="1011";
                  when "11"=>chuout<="0111";
                  when others=>null;
                end case;
            end if;
          end process clk_chu_out;
  out_led: process(keyout,reset,chuclkout)
      begin
          p<='0';  
         if(reset='0') then
             outled<="0000000";
        elsif chuclkout 'event and chuclkout = '1' then
        case keyout(3 downto 0) is
            when "0111"=>case keyout(7 downto 4) is
                  when "0111"=>outled<="1111001"; --1  
                  when "1011"=>outled<="0011001"; --2
                  when "1101"=>outled<="1111000"; --3
                  when "1110"=>outled<="0100011"; --u
                  when others=>null;
               end case;
            when "1011"=>case keyout(7 downto 4) is
                  when "0111"=>outled<="0100100"; --4
                  when "1011"=>outled<="0010010"; --5 
                  when "1101"=>outled<="0000000"; --6 
                  when "1110"=>outled<="1000000"; --d 
                  when others=>null;
               end case;
            when "1101"=>case keyout(7 downto 4) is
                  when "0111"=>outled<="0110000"; --7
                  when "1011"=>outled<="0000010"; --8 
                  when "1101"=>outled<="0010000"; --9 
                  when "1110"=>outled<="0000110"; --e
                  when others=>null;
               end case;
            when "1110"=>case keyout(7 downto 4) is
                  when "0111"=>outled<="1000001"; --o* 
                  when "1011"=>outled<="0100001"; --0  
                  when "1101"=>outled<="0111111";  
                  when "1110"=>outled<="1000110";  
                  when others=>null;
               end case;
           when others=>null;
         end case;
       end if;
    end process out_led;
         outkey<=chuout;
         keyout<=chuout&inkey;
 end art;