4 Character Fighting Game on Basys 3 FPGA

A 4 player fighting game implemented on two Basys 3 FPGA boards. Players control characters (Mage, Gunman, Swordman, Fistman) in a VGA-displayed arena, attacking each other with normal and ultimate projectiles. Real-time visuals, audio feedback, and gameplay interactions are handled via hardware modules and inter-board communication.

IMG_8487.mp4

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🕹 Gameplay Overview

• 2 Players per Basys 3:
  • Player 1: WASD to move, Spacebar to attack, E for ultimate
  • Player 2: Arrow keys to move, Numpad 0 to attack, Numpad . for ultimate
• Each character has different:
  • Health, projectile range, movement speed, projectile speed
• Attacks:
  • Normal attack: 1 damage
  • Ultimate attack: 2 damage (can only be used when charge meter is full)
• Collisions:
  • Characters can’t pass through each other
  • Projectiles destroyed on impact or when out of range

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🎮 User Interface

• Character Display: OLED (1 per player)
• Health Display: 7-Segment Display
• Ultimate Charge Meter:
  • P1: LEDs LD15 to LD8
  • P2: LEDs LD7 to LD0
• Audio: Pmod AMP2 used to play character-specific projectile sounds
• Reset: BTNC resets the game

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🖥 VGA Arena Display

• Rendered at 640x480
• Displays arena, character sprites, projectiles, and Game Over screen
• Uses 2x2 Bayer dithering to simulate higher color depth from 320x240 6-bit images

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🧠 Game Logic

• Movement & Collision:

  • Character movement bounded by arena edges
  • Direction tracked for accurate projectile firing
  • Anti-collision logic prevents overlapping characters

• Projectiles:

  • Moves in direction character was facing on fire
  • Destroyed on:
    • Collision with character
    • Leaving screen
    • Exceeding character-specific range

• Ultimate Meter:

  • Charges faster with lower health
  • Blinks when fully charged
  • Can only fire one ultimate at a time

• Health System:

  • Starts with character-specific values
  • Reduced on projectile hit
  • When health = 0:
    • Character becomes a tombstone
    • Cannot move or attack

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🔄 Game States

• Normal: All players active
• Dead: Character replaced by tombstone
• Game Over: Displayed when only one character remains
• Reset: BTNC brings game back to initial state

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🔗 Master-Peripheral Setup

• SW15: Set as Master (ON) or Peripheral (OFF)
• Master Board:
  • Renders VGA arena
  • Syncs character states, handles game logic
• Peripheral Board:
  • Sends player input (10-bit wire)
  • Receives player health (8-bit wire)
  • Updates OLED, LEDs, 7-seg displays

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🖼 Sprite & Image Management

• 20+ Custom Sprites: 20x20 px for characters, projectiles, UI
• Python Script: Converts PNGs to 18-bit RGB .mem files for BRAM usage
• BRAM-based Sprite Rendering:
  • Fetches pixel data for display on VGA
  • Includes tombstone, projectiles, and Game Over background

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🔧 Hardware Interfaces Used

• VGA Display (Arena visuals)
• USB Keyboard (PS2 protocol)
• Pmod AMP2 (Audio)
• OLED Screen (Character display)
• 7-Segment (Health)
• On-board LEDs (Ultimate charge)
• Inter-board GPIO for sync

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📌 Notes

• Movement direction always updated to latest key press
• Sound effects unique per character for immersive feedback

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🚀 Reset & Replay

• Game automatically ends when 3 characters die
• Press BTNC to reset game to initial state