195 Chasey
195 : Chasey
- Author: Yansi Foong
- Description: Control a player in a maze to escape the ghost
- GitHub repository
- Open in 3D viewer
- Clock: 25000000 Hz
PROJECT DESCIPTION
The project is a maze that is displayed on a VGA monitor where you can control a player using four buttons (left, right, up, and down) in order to navigate through and avoid getting caught by the ghost.
The logic is broken into the following sections:
PLAYER LOGIC
The player is controlled by the button inputs (left, right, up, down) and will move accordingly on the map. There is also collision detection with the border and with the maze itself.
GHOST LOGIC
The ghost is set to try and follow the player around on the board. It will attempt to locate the player at all times, although sometimes it gets stuck with an obstacle and can't catch the player. The direction of the ghost is chosen using an FSM with different states for the direction that the ghost is travelling in and changes state depending on where the player is in relation to itself.
MAZE LOGIC
The maze or map are draw on the map and also detect for collisions throughout using different boundary checks to make sure that if there would be a collision, the player or ghost's coordinates don't get updated.
TESTING
You can test the project using the provided testbench or playing the game yourself.
EXTERNAL HARDWARE
- VGA Monitor (display)
- 5 Buttons wired as follows:
| Button | Input pin |
|---|---|
| Reset | ui[0] |
| Left | ui[1] |
| Right | ui[2] |
| Up | ui[3] |
| Down | ui[4] |
Each button should connect the input pin to VCC when pressed (active high). The VGA connector wires directly to the output pins — no resistors or level shifting required for the Tiny Tapeout VGA PMOD.
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | reset | VGA red[1] | |
| 1 | btn_left | VGA green[1] | |
| 2 | btn_right | VGA blue[1] | |
| 3 | btn_up | VGA vsync | |
| 4 | btn_down | VGA red[0] | |
| 5 | VGA blue[0] | ||
| 6 | VGA green[0] | ||
| 7 | VGA hsync |