F20: Space Invaders

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Space Invaders


Abstract

Space Invaders is a fixed one person shooter style video game. The player controls a laser cannon by moving it horizontally across the bottom of the screen and firing at the aliens descending toward the cannon from the top of the screen. There are aliens descending towards the cannon and the player's main goal is to defeat an alien and earn points by shooting it with the laser cannon and destroying it. As more aliens are defeated, the aliens' movement speeds up. The alien invasion is declared successful and the game ends when the aliens have successfully reached the bottom. The final score of total kills is projected after the game ends. The mp3 decoder connected to the speaker will play sound effects required.

Introduction & Objectives

Show list of your objectives. This section includes the high level details of your project. You can write about the various sensors or peripherals you used to get your project completed.

Team Members

Technical Responsibilities

Administrative Roles
  • Game Logic Development
Salvatore Nicosia, Akash Vachhani & Akhil Cherukuri
  • PCB Design
Akhil Cherukuri
  • LED Display Driver
Salvatore Nicosia
  • Graphics Driver
Salvatore Nicosia, Akash Vachhani & Akhil Cherukuri
  • Splash Screen Graphics Driver
Akhil Cherukuri
  • Mp3 Decoder
Akash Vachhani
  • Enclosure
Salvatore Nicosia
  • Hardware Integration
Salvatore Nicosia

Administrative Responsibilities

Administrative Roles
  • Team Leader
Salvatore Nicosia
  • Git Repository Managers
Akash Vachhani & Akhil Cherukuri
  • Code Reviewers
Salvatore Nicosia & Akash Vachhani
  • Wiki Report Manager
Akhil Cherukuri
  • Bill of Materials Manager
Akash Vachhani


Schedule

Week# Start Date End Date Task Status
1
  • 10/12/2020
  • 10/18/2020
  • Read previous projects, gather information, and discuss among the group members.
  • Create a GitLab repository for the project [10/13/2020]
  • Completed
  • Completed
2
  • 10/19/2020
  • 10/20/2020
  • Acquire parts: LED Matrix, VS1053 Mp3 decoder breakout board by Adafruit
, 2X Analog 2-axis thumb joystick with select button + breakout board

  • Completed
3
  • 10/26/2020
  • 11/01/2020
  • Read and familiarize with LED Matrix Datasheet
  • Read and familiarize with MP3 Decoder VS-1053 datasheet.
  • Completed
  • Completed
4
  • 11/02/2020
  • 11/08/2020
  • Develop graphics driver for LED matrix and implement initial game objects
  • Develop driver for MP3 decoder
  • Read MP3 data from Micro SD Card
  • Completed
  • In progress
  • In progress
5
  • 11/09/2020
  • 11/15/2020
  • Finalize wiki schedule [11/10/2020]
  • Circuit Simulation in EasyEDA/Eagle Tool.
  • PCB Layout Design in EasyEDA/Eagle Tool.
  • Finalize component placement on PCB.
  • Order PCB from JLCPCB.
  • Create 3D printed enclosure and extra accessories
  • Completed
  • In progress
  • Not started
  • Not started
  • Not started
  • Completed
6
  • 11/16/2020
  • 11/22/2020
  • Assemble components to circuit boards
  • Extensively test circuit boards in two rounds
  • Develop game logic for space ship movement and monsters respawn
  • Develop splash screen and menu selection
  • Finalize selection of MP3 tracks for in-game sounds
  • Not started
  • Not started
  • Completed
  • Completed
  • Not started
7
  • 11/23/2020
  • 11/29/2020
  • Implement game difficulty logic as enemies count decreases
  • Integrate circuit boards and check proper connections to the components and the microcontrollers
  • Integrate game logic code with LED matrix
  • Integrate game sounds with game logic
  • In progress
  • Not started
  • In progress
  • Not started
8
  • 11/30/2020
  • 12/06/2020
  • Additional Features: Lives, Health Level Bars
  • Integrate subsystem and ensure proper connection and communication between peripherals
  • Integrate all components and finalize 3D printed enclosure
  • Update the wiki page.
  • Not started
  • Not started
  • In progress
  • In progress
9
  • 12/07/2020
  • 12/13/2020
  • Address bugs during testing of the integrated system
  • Test pause/play functionality
  • Test music and effects are synchronized with the game
  • Not started
  • Not started
  • Not started
10
  • 12/14/2020
  • 12/16/2020
  • Update Gitlab repo with complete and working code.
  • Create Project Demo video and upload it to YouTube.
  • Update the wiki page to the final version.
  • Final Demo [12/16/2020]
  • Not started
  • Not started
  • Not started
  • Not started


Bill Of Materials

Item# Part Description Part Model & Vendor Quantity Cost
1 Microcontroller Boards SJ2 Boards (Purchased from Preet Kang) 2 $100.00
2 LED Matrix Display Sparkfun RGB LED Matrix Panel - 64x64 1 $80.00
3 Arcade Buttons and Joystick Kit Arcade Buttons and Joystick Kit EG STARTS 1 $25.94
4 Capacitive Touch Switch Button Self-Lock Module DAOKI 20 Set TTP223 Capacitive Touch Switch Button Self-Lock Module 2 $7.56
5 MP3 Decoder Adafruit VS1053 Mp3 Decoder Breakout Board 1 $24.95
6 Black PLA 3D Printer Filament HATCHBOX PLA 3D Printer Filament 1.75mm 1 $25.12
7 White PLA 3D Printer Filament HATCHBOX PLA 3D Printer Filament 1.75mm 1 $25.12
8 Power Supply 5V 18A MEAN WELL LRS-100-5 AC/DC Switching Power Supply 90W 5V 18A Single Output 1 $21.30
9 Rocker Switch Power Socket Inlet Module Plug 3Dman 15A 250V Rocker Switch Power Socket Inlet Module Plug 5A Fuse Switch with 18 AWG Wiring 3 Pin IEC320 C14 1 $8.73
10 Speaker 3" Adafruit Accessories Speaker 3" (1 piece) 1 $6.58


Design & Implementation

The design section can go over your hardware and software design. Organize this section using sub-sections that go over your design and implementation.

Printed Circuit Board

Design And Architecture

The complete printed circuit board was designed using EasyEDA online software. Implemented both SJ-Two board connectors along with required connections to buttons, led matrix, touch sensors, joystick, VS1053 MP3 Decoder, and MAX98357A I2S Amplifier.

Fabrication

  • PCB was sent to fabrication to JLCPCB China which provided PCB with an order of 5 and 2 layers of PCB and common grounded the rest of the copper area.

DRC elements (in mm)

  • Track Width = 0.254
  • Clearance = 0.152
  • Via Diameter = 0.61
  • Via Drill Diameter = 0.305


PCB Schematic


PCB 2D Real View


PCB Top Layer


PCB Bottom Layer

LED MATRIX

Hardware Interface

In this section, you can describe how your hardware communicates, such as which BUSes used. You can discuss your driver implementation here, such that the Software Design section is isolated to talk about high level workings rather than inner working of your project.

LED Matrix Driver =

<Discuss here about led matrix driver>

<Discuss here about led matrix hardware>

Software Design

Show your software design. For example, if you are designing an MP3 Player, show the tasks that you are using, and what they are doing at a high level. Do not show the details of the code. For example, do not show exact code, but you may show psuedocode and fragments of code. Keep in mind that you are showing DESIGN of your software, not the inner workings of it.

MP3 Decoder

Hardware Interface

In this section, you can describe how your hardware communicates, such as which BUSes used. You can discuss your driver implementation here, such that the Software Design section is isolated to talk about high level workings rather than inner working of your project.

<Discuss here about MP3 decoder hardware>

MP3 Decoder Driver

<Discuss here about MP3 player driver>

Software Design

Show your software design. For example, if you are designing an MP3 Player, show the tasks that you are using, and what they are doing at a high level. Do not show the details of the code. For example, do not show exact code, but you may show psuedocode and fragments of code. Keep in mind that you are showing DESIGN of your software, not the inner workings of it.

3D Printed Enclosure

<Discuss here about 3D Printed Enclosure. Attach images of both design and final result>

Testing & Technical Challenges

Describe the challenges of your project. What advise would you give yourself or someone else if your project can be started from scratch again? Make a smooth transition to testing section and described what it took to test your project.

Include sub-sections that list out a problem and solution, such as:

LED Matrix Displaying Incorrect Colors

While testing the driver it was identified an issue with the LED matrix not displaying the correct colors or at times not displaying them at all in certain parts of the display. To analyze this problem different objects were drawn in different sections of the display to understand the cause of this behavior. While testing it was noticed that the LED matrix would display the correct color only when both the top 32 rows and bottom 32 rows were active or when at least one row was active in both sections. After debugging the code and ensuring that the logic to display the pixels was correct the problem turned to be that the cable that connects to HB75E connector of the LED matrix had a few defective pins which were causing issues on some of the registers that control the RGB colors. After extensively testing by drawing more objects it was deduced that the root cause of this issue was a bad cable.

<Bug/issue name>

Discuss the issue and resolution.

Conclusion

Conclude your project here. You can recap your testing and problems. You should address the "so what" part here to indicate what you ultimately learnt from this project. How has this project increased your knowledge?

Project Video

Upload a video of your project and post the link here.

Project Source Code

References

Acknowledgement

Any acknowledgement that you may wish to provide can be included here.

References Used