Difference between revisions of "F18: baem geim"

Revision as of 01:18, 4 December 2018

Grading Criteria

Project Title

baem geim - Snake Game Reborn

Abstract

baem geim is a revived, most amusing Snake Game where a player maneuvers a line which grows in length, with the line itself and wall as obstacle. The concept originated in the 1976 arcade game Blockade, and the ease of implementing snake has led to hundreds of versions for many platforms. This is a new version of snake game which we have developed. The player controls the dot using handheld joystick. As it moves forward, it leaves a trail behind, resembling a moving snake. The snake movement is visually displayed in real time on a 32*32 LED Matrix. The player attempts to eat randomly generated dots as fruits by running into it with the head of the snake. Each fruit eaten increases the length of the snake and controlling it becomes progressively difficult. The player loses the game if the snake runs into itself or hits the screen border. The game is designed using two SJone LPC1758 microcontroller boards one each to drive LED Matrix and Joystick module respectively. They communicate wirelessly through RF Nordic transceiver.

Objectives & Introduction

The main objective of the project is to develop a 2D soleplayer snake game. Other milestones to achieve the objective are as below.

• Visually display the movement of the snake on LED Matrix in real time.
• Control the movement of the Snake through Joystick.
• Transmit the control data wirelessly from input to output console through Nordic transceiver.
• Design PCB for distribution of input power appropriately between two SJone boards.

The project is broadly divided into two modules.

1. Input Module: The input module connects SJone board to two-axis joystick which is used to control the snake advancement. Nordic transmitter continuously transmits control packets to the output module.

2. Output Module: The output module connects another SJone board to LED Matrix for visual display. It recursively polls to receive control packets from the input module and updates the snake movement as per user's input.

Team Members & Responsibilities

• Bharath Vyas Balasubramanyam
  • Driver for Nordic Wireless Transceiver and Joystick

• Neeraj Dhavale
  • Driver for LED Matrix and Nordic Wireless Transceiver

• Sudarshan Aithal
  • Design of Game Algorithm

• Vignesh Kumar Venkateshwar
  • Wiki Management, PCB Design and Driver for Joystick

Schedule

Parts List & Cost

Design & Implementation

Hardware Design

The Hardware design for baem geim involves the use of two SJone LPC1758 microcontroller boards, 32x32 RGB LED Matrix, Joystick module and Nordic Wireless Transceiver as described below. Pin configuration information for integration with PCB and power source have been detailed.

LED Matrix

RGB LED Matrix Organization

The Project uses 32x32 6mm pitch RGB LED Matrix consisting of 1024 RGB LEDs. 32 rows of LED matrix have been divided into 16 interleaved sections/strips. The first section is the 1st 'row' and 16th 'row' (32 x 2 RGB LEDs = 64 RGB LEDs) the second section is 2nd 'row' and 17th 'row' and so on. On the PCB is 12 LED driver chips. These are like 74HC595s but they have 16 outputs and they are constant current. 16 outputs * 12 chips = 192 LEDs that can be controlled at once, and 64 * 3 (R G and B) = 192. So now the design comes together. We can have 192 outputs that can control one line at a time, with each of 192 R, G and B LEDs either on or off. The LPC1758 controller selects which section to currently draw (using A, B, C and D address pins - 4 bits can have 16 values). Once the address is set, the controller clocks out 192 bits of data (24 bytes) and latches it. Then it increments the address and clocks out another 192 bits, etc until it gets to address #15, then it sets the address back to #0. To light up an individual pixel, appropriate row value is loaded on to the address pins A,B,C & D, Clock is set out to traverse the row and when required pixel is reached, the latch is set high to turn ON the pixel.

Technical Details:
Dimensions: 190.5mm x 190.5mm x 14mm / 7.5" x 7.5" x 0.55"
Panel weight with IDC cables and power cable: 357.51g
5V regulated power input, 4A max (all LEDs on)
5V data logic level input
2000 mcd LEDs on 6mm pitch
1/16 scan rate
Indoor display, 150 degree visibility
Displays are 'chainable'

LED Matrix Pin connection to SJone board

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.

Software Design

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Implementation

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Testing & Technical Challenges

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<Bug/issue name>

Discuss the issue and resolution.

Conclusion

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Project Video

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Project Source Code

• Sourceforge Source Code Link

References

Acknowledgement

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References Used

List any references used in project.

• https://cdn-learn.adafruit.com/downloads/pdf/32x16-32x32-rgb-led-matrix.pdf?timestamp=1543806512

Appendix

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