1 Daniel Micheletti Darren Allen Daniel Mazo Jon Lamb Lyle Johnson Pixel Perfect WiCam: A Wireless Digital Camera Presented by : Kyle Swenson

2 Outline Design goals and challenges Project design flow & starting point Design process –Product Prototyping –Microchip Synthesis & Fabrication –Verification & Integration –Software Security Implementation and Interface Results & conclusion

3 Design Goals and Challenges Goal: … to design, fabricate and verify an integrated circuit (IC) that controls the SSLAR2 image sensor while adding wireless functionality and an LCD screen … and implement in a prototype security application Challenges –Multiple devices –Design complexity –Size limitation –Fabrication deadline –Interface definition for software

4 Project Design Flow Revise Design Test Synthesis & Fabrication Implement Verify Prototype Expand

5 Project Starting Point Front View Rear View

6 Initial Product Design microchip

7 First Task Control and Communication Decoupling

8 Device Selection: LCD 2.2” display –176 x 220 pixels Only 4 control pins SPI

9 Device Selection: Transceiver Datasheet specifies data range of 500 meters Bit transmission rate of 2 Mbps Very low power Just 5 control pins, SPI

10 Generic SPI Module Image Controller Standardized interface Device Controller Generic SPI Module Standardized interface

11 Device Prototyping: LCD Initialize conditions Limit area and write single color Connect to system Revise errors & finalize

12 Device Prototyping: Transceiver Receive Side PrototypingTransmit Side Prototyping

13 First Revision Transceiver Limitations –Testing showed a distance of ~5 m –2 Mbps is not sustainable Packet overhead Distance considerations Transceiver Solution –Buffer the data

14 Transceiver Backup Plan

15 Implementation: Synthesis and Fabrication

16 Integration: PCB Development LayoutFabricated PCB Receive Board Transmit Board

17 Verification: Chip and PCB FTDI bus contention Bidirectional pins –Inverted direction Two transistors cause of system-wide failure –30,000 transistors total –0.6 mm 2

18 Revision: Microsurgery FIB area Microsurgery Request Microsurgery Results Inverted direction signal Inverter Bypass

19 Verification: Pad Powering Problem Further testing showed critical pads not powered –Transceiver, DAC, LCD signals not present

20 Revision: Backup Plan Implement design in FPGA Goal still accomplished

21 Final Product Two Versions: –FPGA & SSLAR2 with software interface definition –FPGA & SSLAR2 with wireless transmission and LCD

22 Software Interface Definition Define a hardware abstraction layer Use interface definition to create prototype security system Security System –Face Detection –Face Recognition –Motion Detection –Tablet web-based viewer

23 Software: Tablet Web Interface WAN/ LAN

24 Summary: Results Built the first revision of IC –Designed & Fabricated IC in 3 months –Implemented several backup plans as needed to get design to work Built critical aspects of a complete security system

25 Acknowledgements Dr. Suat Ay Anthony Kanago VLSI Sensors Research Group

26 Questions?

27 Backup Plan Block Diagram

28 System Block Diagram

29 Detailed Block Diagram (ASIC Core)

30 FTDI Block

31 USB State Machine