EE 551 Final Project

1
EE 551 Final Project

• Differential Score-Keeping SystemAndrew Moor
  and Aaron Symko

2
System Requirements

• Power-up rest / test
• 2-digit display output
• Score for Team A
• Score for Team B
• Difference in scores
• Number of lead changes
• Bargraph output for visual indication of scores
  and display modes

3
System Modules

• Main controller
• Input processing
• Display controller
• Bargraph controller
• Scorekeeping controller (ALU)
• Built-in self-test

4
System Block Diagram
Bargraph LEDs
Multipurpose Output Control Module
Built-in Self-Test Module
Input Processing Module
Score Switches
Control Module (State Machine)
External Clock
Mode Control Module
Mode Control Switches
Score Processing Module
7-Segment Displays Decoder / Controller Module
7-segment LED displays
5
Main Controller

• State machine
• Integrated power-up reset and self-test
• Sends control codes to ALU
• Routes results from ALU to display controller and
  bargraph controller
• Monitors clean signals from input processing
  module

6
Input Processing Module

• Accepts raw input signals from the outside
  world
• Debouncing and clock synchronization
• For score buttons, returns a logic level on the
  appropriate line until cleared by the controller
• For mode switches, synchronizes all changes with
  the system clock

7
Display Controller

• Accepts a 7-bit binary number between 0 and 99
  (output of the ALU, routed through the main
  controller)
• Converts binary number to a 2-digit BCD
  representation
• Generates appropriate logic levels to drive
  7-segment display
• Returns these logic levels to the controller (7
  bits for each digit)

8
Bargraph Controller

• Accepts data from the main controller
• Current display mode
• ALU output value (number from 0 to 99)
• For Team score modes, lights up all 4 LEDs on
  that teams side

Team A
Team B
Team A
Team B
Team A score mode
Team B score mode
9
Bargraph Controller

• For Difference mode, lights up
• 1 LED if team is leading by less than 5
• 2 LEDs if team is leading by 5 to 9
• 3 LEDs if team is leading by 10 to 14
• 4 LEDs if team is leading by 15 or more

Team A
Team B
Difference Score Mode Team B is leading by 12
points
10
Built-in Self-test

• Power-up default mode
• Accessible at any time via a switch
• Lights up all output LEDs

Team A
Team B
11
Scorekeeping Controller

• Consists of two sub-modules
• Main ALU unit
• ALU controller

12
ALU Controller

• The ALU controller multiplexes the desired output
  from the ALU back to the main controller

7
MUX
difference
7
To Main Controller
7
Score A
7
From ALU
output
Score B
7
Lead Change Total
control
From Main Controller
2
13
ALU

• Computes and stores the team A score, team B
  score, difference, and number of lead changes.
• Asynchronous operation with a reset option.
• LSB of current mode was used as an input to
  determine which team score to increment.

14
ALU Module
Reset
From controller module
Control(0)
2
Team in lead
ALU
async
difference
Score A
Score B
Lead Change Total
To controller module
15
Conclusion

• Altera simulation results match the expected
  operation of the entire system.
• Future enhancements
• Largest point margin
• Longest unanswered scoring streak