Transcript pong game - Pakistani Students Blog

Owais Ibrahim Akram
Mohsin Murad
InTRODUCTION
ONE OF THE BASIC
ATTARI GAMES.
THE PONG GAME
CONSISTS OF A BALL
RANDOMLY BOUNCING
ON THE SCREEN.
A PADDLE AT THE
BASE ENABLES THE
USER TO MAKE THE
BALL BOUNCE BACK
UP.
requirements
MULTISYNC VGA
MONITOR
SUPPORTING 640X480
RESOLUTION.
XILINX SPARTAN-3
FPGA KIT.
TWO ONBOARD PUSH
BUTTONS TO CONTROL
PADDLE MOVEMENT.
vga_h_sync ,
vga_v_sync ,
vga_R , vga_G ,
vga_B
50MHZ OSCILLATOR.
PUSH BUTTONS
quadA , quadB
dRIVING The
Vga monitor
A VGA MONITOR
REQUIRES 5 SIGNALS TO
DISPLAY A PICTURE:
R,G & B (THE RED,
GREEN AND BLUE
SIGNALS).
HS & VS (THE
HORIZONTAL AND
VERTICAL
SYNCRONIZATION).
MODULES USED
GENERATING R,G & B
SIGNALS.
CLOCK DIVIDER.
VIDEO GENERATOR
DRAWING THE PADDLE
DRAWING THE BALL
DRAWING THE
PADDLE
TWO ONBOARD PUSH BUTTONS FOR MOVING THE
PADDLE LEFT OR RIGHT.
50HZ CLOCK REQUIRED FOR SCANNING THE PUSH
BUTTONS.
6 CLOCK DIVIDER MODULES EACH DIVIDING THE
CLOCK BY 10 (50MHZ/1000000HZ=50HZ).
IF quadA IS PRESSED THEN
PaddlePosition = PaddlePosition – 1;
IF quadB IS PRESSED THEN
PaddlePosition = PaddlePosition + 1;
PaddlePosition = PaddlePosition +/- 25;
FOR FASTER MOVEMENT.
DRAWING THE
BALL
16X16 PIXELS SQUARE.
RANDOM COLLISIONS.
4 “HOT SPOT” PIXEL, ONE
IN THE MIDDLE OF EACH
SIDE OF THE BALL.
IF THE BALL DRAWS ITS
“HOTSPOT” AT THE SAME
TIME THE PADDLE OR
BORDER DRAWS ITSELF, WE
SAY THERE IS A
COLLISION ON THAT SIDE.
pROBLEMS
eNCOUNTERED
THE ORIGINAL CODE
USED NON PS/2 MOUSE
FOR PADDLE MOVEMENT.
CD4093 IC WASN’T
AVAILABLE.
THE PADDLE WAS
UNCONTROLLABLE
WHEN WE USED TWO
PUSH BUTTONS AND
50MHZ CLOCK.
RESTRICTED MOVEMENT
OF PADDLE.
The original setup used Pluto fpga
board with 25MHz internal crystal
and a modified mouse to control
the paddle movement