32fenpinqi.txt

来自「这是用VHDL语言写的32位分频器的程序」· 文本 代码 · 共 34 行

LIBRARY IEEE;
USE IEEE.STD_LOGIC_1164.ALL;
USE IEEE.STD_LOGIC_UNSIGNED.ALL;
ENTITY kkk IS
   PORT(CLK,EN:   IN STD_LOGIC;
        OUTPUT:  OUT STD_LOGIC);
END kkk;
ARCHITECTURE behav OF kkk IS
      signal m:std_logic; 
 BEGIN
        process(CLK)
         VARIABLE ping,l: integer ;       
       begin
            IF (clk'event and clk='1') THEN
              IF en='1' THEN
                ping:=0;
                 m<='1';
               output<='1'; 
              eLSE
               ping:=ping+1;
               IF ping=31 THEN
                  ping:=0;
                   m<='1';
               output<='1';
                END IF;
             END IF;
          if m='1' then
            m<='0';
           output<='0';
          end if;
            end if;                
        END  PROCESS;
END behav;