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Why Laser Mouse?

Why Laser Mouse?. Professors Business Professionals. How Does it Work?. Camera to FPGA. Find Brightest 3 Pixels in a Row Color Mapping Send Middle Pixel Data to Next Step - Microcontroller. Camera to FPGA: Data Flow. XBUS: FPGA to Microcontroller.

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Why Laser Mouse?

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  1. Why Laser Mouse? • Professors • Business Professionals

  2. How Does it Work?

  3. Camera to FPGA • Find Brightest 3 Pixels in a Row • Color Mapping • Send Middle Pixel Data to Next Step - Microcontroller

  4. Camera to FPGA: Data Flow

  5. XBUS: FPGA to Microcontroller • Use Xbus Interface we designed in Class • Only need one way communication • Takes Bright Spot Pixels from FPGA and sends them to Microcontroller

  6. Microcontroller Data Flow • Takes Bright Spot Information from FPGA • Converts it from Camera Pixels to Laptop Pixels • Data Flow (Shown Below) Get Data from XBus Correlation & Mapping

  7. Relative Coordinates & Calibration Point 1 • Get Absolute Coordinates from Camera • Find Delta X and Delta Y • These are Relative Coordinates to Send to PS/2 • Find Boundaries of Monitor Projection Delta X Point 2 Delta Y Click 1 Click 2

  8. PS/2: Microcontroller to Laptop • Ships it to laptop through PS/2 (Mouse) Port PS/2 Packet To PC Mouse Click

  9. PS/2 Protocol • Send 3 Data Packets • Mouse Click and Movement Info • Relative X Coordinates • Relative Y Coordinates • Keep Clock Low for 170 microseconds between packets

  10. Design Decisions • Good Decisions  • Used RC2 Camera and provided camera project • Bad Decisions  • Tried to implement a Software (Win NT) Laser Mouse Driver

  11. What Works…and Almost Works Pin Issues

  12. Future Improvements • Software Laser Mouse Driver • Palm Pilot Graffiti style Handwriting Recognition • Wireless Mouse Click Button

  13. Questions?

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