微處理器 - Lattice LCMXO2-4000HC-4MG132C (STEP-MXO2 V2) - VHDL - Button

參考資訊：
https://www.stepfpga.com/doc/step-mxo2%E5%85%A5%E9%97%A8%E6%95%99%E7%A8%8B

main.vhd

library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
   
entity main is
    port(
        btn : in bit;
        led : out unsigned(7 downto 0)
    );
end main;
   
architecture logic of main is
    signal cnt : unsigned(7 downto 0) := "11111110";
  
begin
    process(btn) is
    begin
        if (btn'event and btn = '0') then
            cnt <= cnt rol 1;
        end if;
    end process;
    
    led <= cnt;
end logic;

main.lpf

LOCATE COMP "led[0]" SITE "N13";
LOCATE COMP "led[1]" SITE "M12";
LOCATE COMP "led[2]" SITE "P12";
LOCATE COMP "led[3]" SITE "M11";
LOCATE COMP "led[4]" SITE "P11";
LOCATE COMP "led[5]" SITE "N10";
LOCATE COMP "led[6]" SITE "N9";
LOCATE COMP "led[7]" SITE "P9";
LOCATE COMP "btn" SITE "L14";

完成