Difference between revisions of "F22: xGameCreate"

Revision as of 22:23, 10 December 2022

Grading Criteria

Whack-a-mole

Abtract

Whac-a-Mole is a fun arcade game in which the player hits plastic moles with a hammer as soon as it appears out of their hole, to score points. We will be recreating the same old game with some modifications. Instead of plastic moles and a hammer, we will be using a LED Matrix to display mole-like characters and touch sensors to imitate the hammer. The scoring will be based on the no of moles you hit and how accurately you hit. We will be designing three levels and after each level, the difficulty of the game will rise.

Objectives & Introduction

• The aim of the game is to hit as many moles as possible as they appear out of the holes

• There will be three lives and the speed and complexity of the game increase as the score goes up.

• If you miss a mole you lose a life

• Based on how many moles you hit your score will increase.

• The LED matrix is used to create the 12-mole-hole-like animation and the moles appear randomly in some holes.

• ITO-coated PET is used for receiving the touch input (hitting the mole).

• A speaker is used to play background music, and sound clips when you hit a mole.

Team Members & Technical Responsibilities

• Karthigai Amutha Ezhilarasu
  • Touch Sensor Driver Implementation
  • Game logic design
  • Hardware Integration

• Stephen Oneto
  • Graphics Driver Implementation
  • Game logic design
  • Enclosure design and 3D printing
  • Battery regulatory circuit design

• Yatish Koul
  • MP3 Driver Implementation
  • Integrating MP3 module with the Game
  • Game logic design

Schedule

Materials List with cost

Design & Implementation

Schematic

Touch Breakout Board

Hardware Design

The system is built on the SJ2 development board. A 64*64 LED matrix, a touch breakout board, and an MP3 decoder are interfaced with the SJ2 board. The LED matrix screen has a top rectangle to display the score and lives. The remaining portion is divided into 12(4*3) rectangles depicting 12-mole holes. Each of the 12 holes is covered with an ITO-coated flexible transparent sheet. Each of the ITO sheets is connected to the touch sensor breakout board through wires. The system is designed to operate on a battery. The entire system is enclosed in a 3D-printed enclosure.

Hardware Interface

Hardware Design front view

Capacitive Touch Breakout

Touch Breakout Board

We used a MPR121 12-channel capacitive touch sensor breakout board. It supports I2C and can be configured for different levels of sensitivity. The 12 touch sensor pins are connected to 12 ITO films which are placed on top of the LED matrix. When a touch is detected an interrupt will be generated. The status of the 12 sensors is then verified one by one in order to determine which pin is touched.

Hardware Design

Software Design

LED Matrix

LED Matrix

Hardware Design

Software Design

MP3 Decoder

This module is a straightforward MP3 player that runs on the YX5300 high-quality MP3 audio chip. MP3 and WAV file formats with sampling rates of 8 kHz to 48 kHz are supported. The micro SD card used to store the audio files can be inserted because there is a TF card socket on the board. By sending commands to the module via the UART interface, the MCU can control the MP3 playback state by altering the volume, switching tracks, etc.

Serial MP3 Player

Hardware Design

The UART Tx, UART Rx, VCC, and GND pins are the 4 pins that the MP3 decoder module needs. The SJ2 board provided the module with the 3.3V it needed to start up. On the SJ2 board, UART1 pins have been set up so that commands can be sent to the decoder. This UART communication's baud rate is set at 9600 bps. Additionally, this decoder has a speaker-connected 3.5mm audio jack.

Connection diagram of MP3 decoder to SJ2 board.

Software Design

MP3 Initialization

In our project, the command we use plays the song by navigating to its index on the SD card. In our code, the function that sends this command is referred to as play music at index. We must first send the command [Select device] before we can send the instruction to play music at a specific index. The datasheet specifies that you should send "7E FF 06 09 00 00 02 EF" since Serial MP3 Player only accepts micro SD cards. Additionally, the function uart_polled_put on UART1 is being used to transmit the commands.

Game Logic

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.

This section includes implementation, but again, not the details, just the high level. For example, you can list the steps it takes to communicate over a sensor, or the steps needed to write a page of memory onto SPI Flash. You can include sub-sections for each of your component implementation.

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:

<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

• Whack_a_Mole Git Lab Source Code Link

Acknowledgement

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

References

List any references used in project.

1. Serial MP3 Player Datasheet
2. Whack_a_Mole Miniclip Game