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architecture rotate1 of leds is
signal clk_4hz: std_logic;
begin
process (clk)
-- 3_000_000 is 0x2dc6c0
variable counter : unsigned (23 downto 0);
begin
if rising_edge(clk) then
if counter = 2_999_999 then
counter := x"000000";
clk_4hz <= '1';
else
counter := counter + 1;
clk_4hz <= '0';
end if;
end if;
end process;
process (clk)
variable count : unsigned (1 downto 0);
begin
if rising_edge(clk) and clk_4hz = '1' then
count := count + 1;
if count = 0 then
led1 <= '1';
led2 <= '0';
led3 <= '0';
led4 <= '0';
led5 <= '1';
elsif count = 1 then
led1 <= '0';
led2 <= '1';
led3 <= '0';
led4 <= '0';
led5 <= '0';
elsif count = 2 then
led1 <= '0';
led2 <= '0';
led3 <= '1';
led4 <= '0';
led5 <= '1';
else
led1 <= '0';
led2 <= '0';
led3 <= '0';
led4 <= '1';
led5 <= '0';
end if;
end if;
end process;
end rotate1;
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