我正在使用 VHDL 进行秒表项目,但我不知道如何制作计数器的 CLK 方波?请帮忙。
这是我的代码:
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_unsigned.ALL;
entity Circuit is
Port ( CLK : in STD_LOGIC := '0';
CLR : in STD_LOGIC;
Q : out STD_LOGIC_VECTOR (5 downto 0));
end Circuit;
architecture Behavioral of Circuit is
signal s: STD_LOGIC_VECTOR := "000000";
begin
process (CLK, CLR)
begin
if rising_edge(CLK) then
if CLR = '1' OR s = "111011" then
s <= "000000";
else
s <= s+1;
end if;
end if;
end process;
Q <= s;
end Behavioral;