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CSE 477 Spring 2000 Kenneth Washington & David Chang

CSE 477 Spring 2000 Kenneth Washington & David Chang. Major Components. Design Update 1. Update 1.1 – No character LCD interface. Complete graphic user interface. Update 1.2 – Accelerometer moves in 4 cardinal directions instead of 8. Design Overview. Control Module Design.

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CSE 477 Spring 2000 Kenneth Washington & David Chang

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  1. CSE 477 Spring 2000 Kenneth Washington & David Chang

  2. Major Components

  3. Design Update 1 • Update 1.1 – No character LCD interface. Complete graphic user interface. • Update 1.2 – Accelerometer moves in 4 cardinal directions instead of 8.

  4. Design Overview

  5. Control Module Design

  6. Control Module Input / Outputs(Extending the PAN module) • 8 input bits of control signals generated by the microcontroller ( 3 bits for direction, 2 bits for speed, 2 bits for Ok/Cancel/Idle, and 1 reserved bit for future use). • 15 output bits of memory address (8 X and 7 Y). • Read and Write Enable.

  7. Movement is relative. Use cursor to tell the user’s current position. Use different tilting level to control cursor speed (2 speeds). Menu system to change color of brush. Ok / Cancel signal must come back to idle before next selection (must have edge in between). Draw signal does not have to come to idle. User Interface Design

  8. More User Interface… • System will be fast for the user, so we will be over-sampling. • Solution is to simply waste some samples to simulate a timely response.

  9. Milestones • Completed: Multiplexing 2 accelerometer signals to 1 interrupt. • Completed: Display paint area and menu on screen. • Week 7: Working on Synchronizing all 3 accelerometer signals. • Week 7: Working on Displaying and moving a cursor ( 3 x 3 pixel area ) on screen based on position. • Week 8: Draw pixels on screen and Add change color functionality. • Week 9: Integration. • Week 10: Demo!!!

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