Design of Elevator Control system using VHDL

Develop a design for an eight-floor elevator. The inputs/outputs are shown
below. The elevator displays the moving direction and the current floor. In
addition, the maximum weight in the elevator is 4500lb. If the current weight
is larger than 4500lb, the elevator will alert automatically. A Boolean signal
comes from the maximum weight detector and will be set to 1 whenever the
maximum weight is exceeded. The door of the elevator should not keep open
for longer than 3 minutes.

Otherwise, it will close automatically. The door alert signal should normally be below but go high whenever the door has been open for more than 3 minutes. This door alert signal will be used by the mechanical part of the elevator to issue a “close door” command. Whenever the door is open for more than 3 minutes, a blinking 30mA lamp will come on.

This blinking will happen at a rate of approximately 1 blink every 2 seconds. In addition, there is a sensor on each floor to sense whether the elevator has passed the current floor. This sensor provides a 3-bit Boolean signal that encodes the floor that has been passed. We assumed we were given a 3-bit Boolean signal.