Lab 3: Bouncing Ball I

VID_20190917_132852.mp4

Project 3 : Bouncing Ball 1

In this lab, we will program the FPGA on the Nexys2 board to display a “bouncing ball” on a 640 x 480 VGA monitor connected to the VGA interface on the board. This will requires us to generate the required sync and video signals consistent with the VGA standard.

Step 1: Add source code for "vga_sync"

The reason for this code is to generate horizontal and vertical wave forms. It also sets a clock speed of 25 MHz to drive horizontal and vertical counters h_cnt and v_cnt that are used to generate different time signals.

vga_sync

Step 2A: Add Source code for "vga_top"

This code is necessary to properly connect both the vga_sync code and the ball code together, as well as to allow the board to connect properly with the vga port / signals.

Vga_top

Step 2B: Add Constraint code for "vga_top"

This code is necessary in order to properly set the multiple properties and pins for our board / vga connector. It also helps manage the clock signal that this lab uses.

Step 3: Add source code for "Ball"

This code generates the actual ball we use. It defines what color combination of Red, Green, and Blue the ball is. It is also represents the balls X and Y positions with ball_x and ball_y. Finally we can also control the balls movement using ball_y_motion.

ball

Step 4: Run Synthesis, Implementation, and Bit-stream

After adding all the necessary code run through synthesis, Implementation, and Bit-stream to make sure all the code was input properly and no errors occur.

Step 5: Connect to Monitor

Connect your Nexys 4 DDR Board to the monitor in the lab using the VGA port on the board. Change the settings on the monitor until the bouncing ball appears on the screen.

VID_20190917_132852.mp4

Step 6 : Add motion in the x-axis

In the Ball source file code copy the Ball_y_motion line and paste it immediately after, edit it to say Ball_x_ motion.

Next copy the entire mball process and repeat for every instance of y changing them to x.

This should add x-motion to the ball equal to your original y-motion.

VID_20191203_132954_LS~3.mp4

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