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Traffic light controller
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library IEEE;
use IEEE.STD_LOGIC_1164.all;
use IEEE.STD_LOGIC_unsigned.all;
entity traffic is
port (clk: in STD_LOGIC;
clr: in STD_LOGIC;
lights: out STD_LOGIC_VECTOR(5 downto 0));
end traffic;
architecture traffic of traffic is
type state_type is (s0, s1, s2, s3, s4, s5);
signal state: state_type;
signal count: STD_LOGIC_VECTOR(3 downto 0);
constant SEC5: STD_LOGIC_VECTOR(3 downto 0) :=
"1111";
constant SEC1: STD_LOGIC_VECTOR(3 downto 0) :=
"0011";
begin
process(clk, clr)
begin
if clr = '1' then
state <= s0;
count <= X"0";
elsif clk'event and clk = '1' then
case state is
when s0 =>
if count < SEC5 then
state <= s0;
count <= count + 1;
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