微處理器 - Gowin GW2AR-LV18QN88C8/I7 (Lichee Tang Nano 20K) - VHDL - Button

參考資訊：
https://github.com/YosysHQ/apicula/tree/master/examples
https://github.com/YosysHQ/apicula/wiki/Nextpnr%E2%80%90Himbaechel-Gowin

main.vhd

library ieee;
use ieee.std_logic_1164.all;
     
entity main is
    port(
        btn : in bit;
        led : out bit
    );
end main;
     
architecture logic of main is
begin
    led <= btn;
end logic;

main.cst

IO_LOC "led" 15;
IO_LOC "btn" 87;

完成