微處理器 - Altera MAX10 10M02SCM (小脚丫STEP-MAX10) - VHDL - LED

參考資訊：
https://www.stepfpga.com/doc/step-max10

library ieee;
use ieee.std_logic_1164.all;
   
entity main is
    port(
        clk : in std_logic;
        led : out std_logic_vector(0 to 7) := "11111111"
    );
end main;
   
architecture logic of main is
    signal val: std_logic_vector(0 to 7) := "11111111";
    signal clk_cnt : integer := 0;
   
begin
    process(clk) is
    begin
        if (clk'event and clk = '1') then
            clk_cnt <= clk_cnt + 1;
 
            if (clk_cnt = 12000000) then
                clk_cnt <= 0;
                led <= val;
                val <= not val;
            end if;
        end if;
    end process;
end logic;