Why Laser Mouse? Professors Business Professionals.

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Presentation transcript:

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

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

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

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

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

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

What Works…and Almost Works Pin Issues

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

Questions?

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