readme

elevaters used in transportation

-- Copyright(C) 2006 by Xilinx, Inc. All rights reserved. 
-- The files included in this design directory contain proprietary, confidential information of 
-- Xilinx, Inc., are distributed under license from Xilinx, Inc., and may be used, copied 
-- and/or disclosed only pursuant to the terms of a valid license agreement with Xilinx, Inc. 
-- This copyright notice must be retained as part of this text at all times. 
-----------------------------------------------------------------------

The elevator project is set up to demonstrate the use of a partitioned design.
The project uses logical partitions to allow small design changes to effect only 
the pre-defined logic group(s) containing the changes.  This allows customers to perform 
more design runs in a shorter amount of time, resulting in a faster time to market.

***** Design Description *****

Elevator is a simple 10-floor elevator controller design consisting of a top level module which 
instantiates four sub-modules comprising four Logic Groups. There are two elevators.  The main 
elevator car has access to floors 1 through 9.  The express car allows you to access the 10th 
floor from the 1st floor when the correct security code is entered.

  top.v   - The top-level which connects all the logic groups to each other and to the top-level ports.
  Contoller.v - Evaluates passenger input and elevator car status to determine needed action for elevator cars.
  elevator_car.v - Control module for main elevator car.
  express_car.v - Control module for express elevator car.
  tracking.v - Module used to store elevator status and maintenance log.   

A constraints file top.ucf contains timing constraints, pin locations and area groups for implementation.

The project also includes a testbench top_tb.v to show the functionality of the design.

Target Device: (5VLX30 FF324 -3)


CONTROLS 


Inputs:
  clk   - System clock for the Elevator design.
  reset - Sets the Elevator cars to a know position/status representing the power-on 
          state of the Elevator.
  data_enable - Controls reading of Maintenance log by elevator maintenance worker
  write_enable - Controls writing to Maintenance log by elevator maintenance worker
  main_external_requests  - 9 bit signal indicating a request from one of the nine 
                            floors to have the elevator come to that floor to pick 
                            up a passenger
  exp_request_up - Outside request to go up in the Express car
  exp_request_down - Outside request to go down in the Express car.
  main_sensor_trip - Trip signal indicating that the Elevator is "stuck", issued by 
                     passenger inside main car
  main_internal_requests - 9 bit signal indicating requested floor from inside the main elevator car.
  main_temp - 8 bit signal representing the temperature in the main car
  exp_update_enable - enables updating or changing the security code for the express car
  exp_input_code  - 14 bit signal this is the security code that must be entered in the 
                    express car to access the 10th floor
  exp_temp - 8 bit signal representing the temperature in the express car


Outputs:
  maintenance_alarm - Signal indicating that the maintenance alarm has been triggered
                      This indicates that the elevator is too hot, too cold or stuck
  exp_floor_disp  - 14 bit signal use to indicate the current floor of the express elevator
                    on two 7-seg LED displays
  exp_move_up     - Signal asserted when Express Car is moving up
  exp_move_down   - Signal asserted when Express Car is moving down 
  main_floor_disp - 14 bit signal use to indicate the current floor of the main elevator 
                    on two 7-seg LED displays.
  main_move_up    - Signal asserted when main Car is moving up
  main_move_down  - Signal asserted when main Car is moving down 


Bi-directional:
  maint_data  - 8 bit signal for data input and extraction from maintenance log


______________________________________________________________________________________________


* For support information and contacts please visit the Xilinx.com support site at:

  http://www.xilinx.com/support
            -or-
  http://www.xilinx.com/support/services/contact_info.htm

* For technical support, please open a WebCase on the Xilinx Support site at:

  http://www.xilinx.com/support/clearexpress/websupport.htm