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Counter.vhd
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Counter.vhd
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library ieee;
use ieee.std_logic_1164.all;
entity counter is
port (
clk : in std_logic;
mod5 : in std_logic;
mod12 : in std_logic;
mod15 : in std_logic;
state_code : in std_logic_vector(1 downto 0);
rosso : out std_logic;
giallo : out std_logic;
verde : out std_logic
);
end counter;
architecture counterBehavioral of counter is
signal count : integer range 0 to 100000000;
signal count_standby : integer range 0 to 100000000;
signal count_nominal : integer range 0 to 100000000;
begin
process (clk)
begin
if (count = 100000000) then
count <= 0;
elsif (rising_edge(clk)) then
count <= count + 1; -- Conteggia i cicli di clock
end if;
end process;
process (state_code, mod5, mod12, mod15, clk)
begin
case state_code is
when "11" => -- Disabled
rosso <= '0';
giallo <= '0';
verde <= '0';
-- Reset Variabili
count_standby <= 0;
count_nominal <= 0;
when "00" => -- Maintenance
rosso <= '1';
giallo <= '1';
verde <= '1';
-- Reset Variabili
count_standby <= 0;
count_nominal <= 0;
when "10" => -- Standby
count_nominal <= 0;
if(rising_edge(clk)) then
count_standby <= count_standby + 1;
end if;
if(count_standby < 100) then
rosso <= '0';
giallo <= '1';
verde <= '0';
elsif(count_standby < 300) then
rosso <= '0';
giallo <= '0';
verde <= '0';
else
count_standby <= 0;
end if;
when "01" => -- Nominal
count_standby <= 0;
if(rising_edge(clk)) then
count_nominal <= count_nominal + 1;
end if;
if(mod5 = '1') then
if(count_nominal < 500) then
rosso <= '1';
giallo <= '0';
verde <= '0';
elsif(count_nominal < 800) then
rosso <= '0';
giallo <= '0';
verde <= '1';
elsif(count_nominal < 1000) then
rosso <= '0';
giallo <= '1';
verde <= '1';
else
count_nominal <= 0;
end if;
elsif(mod12 = '1') then
if(count_nominal < 1200) then
rosso <= '1';
giallo <= '0';
verde <= '0';
elsif(count_nominal < 2200) then
rosso <= '0';
giallo <= '0';
verde <= '1';
elsif(count_nominal < 2400) then
rosso <= '0';
giallo <= '1';
verde <= '1';
else
count_nominal <= 0;
end if;
elsif(mod15 = '1') then
if(count_nominal < 1500) then
rosso <= '1';
giallo <= '0';
verde <= '0';
elsif(count_nominal < 2800) then
rosso <= '0';
giallo <= '0';
verde <= '1';
elsif(count_nominal < 3000) then
rosso <= '0';
giallo <= '1';
verde <= '1';
else
count_nominal <= 0;
end if;
end if;
when others =>
rosso <= '0';
giallo <= '0';
verde <= '0';
end case;
end process;
end counterBehavioral;