cnt4.vhd

在开发板上实现按键控制数码管实验

library IEEE; 
use IEEE.std_logic_1164.all;
entity CNT4 is
   PORT ( CLK: IN STD_LOGIC;
          Q  : BUFFER INTEGER RANGE 0 TO 15);
END;
ARCHITECTURE one OF CNT4 IS
BEGIN
    PROCESS(CLK)
    BEGIN
       IF CLK'EVENT AND CLK ='1' THEN Q <= Q+1;
       END IF;
    END PROCESS;
END;