Team 3D Erik Lorhammer Christopher BermelJosh Cornelius Electrical Computer Engineering Electrical EngineerElectrical Engineer

Objectives  3D Volumetric Display  System loads pictures from an SD card to DDR SDRAM and sends pictures to a projector in a specified order over a VGA interface  Project images onto a screen rotating at 600rpm, the rotation of this screen produces a 3D image  Desired image is 3D CU logo in two colors

 Altera Cyclone II FPGA  Development: ▪ DE2 Board with EP2C35F672C6N Cyclone II ▪ LE’s  Implementation: ▪ Sparkfun Breakout Board with EP2C8Q208C8N Cyclone II ▪ Less Memory Available On-Chip  SDRAM will contain all storage and program information so not a big concern. ▪ One-Fifth Logic Elements (8256 LE’s)  Make sure that design fits within this constraint while working on DE2 board. ▪ Program via Jtag interface ▪ Elements being programmed in Verilog  Running at 100 MHz, initial Fmax results from Quartus II show critical path Fmax to be ~167MHz so have some headroom if frame rate is not adequate.

 SDRAM  Micron - MT46V32M8P-6T:G TR ▪ 256MB DDR SDRAM  SRAM  Acts as Frame Buffer  At least 1MB to store two images ▪ One image is ~300KB, want to have two buffers in order to simultaneously put a new image into buffer while reading the older one  Recent Decision so part has not been selected yet  SD-Card  Kingston 1GB Card ▪ Will allow for up to four different image sets to be on SD-Card for easy changing of 3D image without going back to laptop  Pre-defined software package takes care of bus interactions and all required communications.

 VGA  640 x 480 at 8-bits Color ▪ Images are stored in frame buffer in SRAM ▪ Full image sets are stored in SDRAM  Mega Function provided by Altera University Program. ▪ 640 x 480 at 10-bits Color (still researching 10-bits ▪ May not be adequate for our needs backup is designing our own VGA Controller  Optical Encoder  CUI Inc. High Resolution Encoder ▪ Keeps control board up to date on mirror location ▪ Will allow synchronization of frame output every 360 degrees (~24 frames)

 Code in C / C++ using Nios II IDE (eclipse)  Included debug tools ▪ Access to registers ▪ Stepping through program  Program LED as additional debugging tools  LEDs light at certain points in code, after certain actions have been completed  Quartus II Software  Tools to get accurate timing between elements  Test Functionality at each step  Each Component can be individually tested ▪ SDRAM proper timing ▪ Moving images from SD-Card to SDRAM ▪ Outputting a single picture on VGA ▪ Proper implementation of Frame Buffer on SRAM

 Steel Turntable  12.06” outer diameter  6.33” inner diameter  HDPE Ring and Polycarbonate Arches  Bolted to steel turntable  Holds projection screen in place  Mirrors are mounted to the ring  Friction Drive  Motor spins small wheel that drives large ring

 Projector  Standard DLP projector borrowed from department  Custom focusing lens  Allows for large projection image to be focused on a small screen at a short distance  Designed with help from Professor McLeod  Mirrors  Three mirrors for image transmission  Translucent Screen  1/8” Acrylic sheet

 Control Board fully realized  All components placed in Quartus II and verification testing beginning ▪ Testing: ▪ SD-Card properly initialized by board ▪ SD-Card transferring images to SDRAM ▪ SDRAM transferring images to SRAM Frame Buffer ▪ VGA Controller taking images from SRAM Frame Buffer and outputting to projector ▪ Projector image clear and crisp  First PCB revision  Mechanical system built and under test  Screen rotating at 600 RPM  Mirror defined  Lens ordered

 Control Board finished and tested  Fully implemented on PCB Schematics ▪ Second PCB revision ordered and delivered  Secondary objectives in Design and Test ▪ LCD panel status screen ▪ Other “Cool Ideas” not yet thought of  Second PCB revision ordered  Full knowledge if third revision needed  Mechanical system only needs a few tweaks  Simple 3D image is displayed (Red Ball)

 Chris  Printed Circuit Board  Mechanical System  Erik  VGA Interface  NIOS II System  Memory Interfaces  Josh  SD Interface  Optics  Image Processing

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