Question

In this assignment, you are asked to design, implement and demonstrate the Traffic Light Controller as a Digital controller as hardware (using remote lab or DSX kit).
First let’s look at how such a system works in the real world.
A Traffic Light Controller of intersection of T section with sensor to detect the waiting car(s) in the intersection.
When the car detected by the sensor, a timer will start counting for some time to give a car driver to turn right since the turn right can be happen even the main road is red ( the driver can turn right with careful ).
If the timer reach the predefined time, the Traffic Light Controller start to change in the logical way (red, green, yellow) with certain time for each light.

The VHDL code must be in done in Xilinx software.

Solution Preview

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library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;

-- Uncomment the following library declaration if using
-- arithmetic functions with Signed or Unsigned values
--use IEEE.NUMERIC_STD.ALL;

-- Uncomment the following library declaration if instantiating
-- any Xilinx primitives in this code.
--library UNISIM;
--use UNISIM.VComponents.all;

--use IEEE.NUMERIC_STD.ALL;

entity Semaphore is
    Port ( iCLK : in STD_LOGIC;
          inRST : in STD_LOGIC;
inCAR1 : in STD_LOGIC; -- inputs for cars
inCAR2 : in STD_LOGIC;
inCAR3 : in STD_LOGIC;
          oRE1 : out STD_LOGIC; -- outputs for controlling the lights on main road
          oYE1 : out STD_LOGIC;
          oGR1 : out STD_LOGIC;
oRE2 : out STD_LOGIC; -- outputs for controlling the lights on the cross street
          oYE2 : out STD_LOGIC;
          oGR2 : out STD_LOGIC;
          oGRCON : out STD_LOGIC; -- conditional green...

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