F13: POV Display

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Revision as of 01:15, 25 November 2013 by Proj user5 (talk | contribs) (Objectives & Introduction)

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Grading Criteria

  • How well is Software & Hardware Design described?
  • How well can this report be used to reproduce this project?
  • Code Quality
  • Overall Report Quality:
    • Software Block Diagrams
    • Hardware Block Diagrams
      Schematic Quality
    • Quality of technical challenges and solutions adopted.

Web-Enabled POV Display

Abstract

The Persistence of Vision (POV) device will display a message that is input by a remote user via a website setup for this project. The message will be received by the microcontroller using a Wifly RN-XV module integrated onto the LPC17xx board. The microcontroller will interpret the message and drive the LEDs to display the message on the POV device.

Figure 1 shows the overall system diagram:

CMPE240 F13 POV1.JPG

Objectives & Introduction

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The team will be divided into two groups. Team 1 will be responsible for the user interface and integrating the Wifly module on the SJSU board to communicate with the website. Team 2 will build the POV device and write the driver to display the user message on the POV display. A summary of the team and responsibilities is shown below:

Team Members & Responsibilities

Team 1 (Jorge Del Valle and Matt Heffner)
- Website Development
- Wifly module setup
- Front end communication from website to wifly

Team 2 (Jasko Begovic and Thu Hoang)
- Mechanical POV device
- LED drive software

The project will take 6 weeks to complete. The following table shows weekly project milestones and the team's progress.

Date Planned Milestone Status
22-Oct Wifly part received; POV parts ordered and shipped Complete
29-Oct Integrate Wifly to SJSU board and connect to Wifi connection Complete
5-Nov Finish mechanical assembly & any electrical interfaces (Hall effect switch.) Read datasheets, obtain necessary libraries for LED device, understand & modify libraries to work with SJSU board Setup Website for user interface to the device Website Setup, LED driver started, Mechanical Assembly Built
12-Nov Implement code to receive data from website via the Wifly module Debugging website communication
19-Nov Finish code for LED driver. We are aiming to display the alphabet. Start integration of the Wifly portion with the POV device
26-Nov Project testing. Have working Assembled code with Web-half & test by inputing various strings via the website
3-Dec Present demonstration and submission of project report

Parts List & Cost

Part Cost
Wifly RX-NV module $35

Design & Implementation

The design section can go over your hardware and software design. Organize this section using sub-sections that go over your design and implementation.

The user interface for the project will be http://povdisplay.com. The user will input a message to be displayed on the POV device, as well as, the RGB color to use.

Several preliminary photos and videos can be found at: http://povdisplay.com/project-videos.html

Hardware Design

Discuss your hardware design here. Show detailed schematics, and the interface here.

Hardware Interface

In this section, you can describe how your hardware communicates, such as which BUSes used. You can discuss your driver implementation here, such that the Software Design section is isolated to talk about high level workings rather than inner working of your project.

Software Design

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Implementation

This section includes implementation, but again, not the details, just the high level. For example, you can list the steps it takes to communicate over a sensor, or the steps needed to write a page of memory onto SPI Flash. You can include sub-sections for each of your component implementation.

Testing & Technical Challenges

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Include sub-sections that list out a problem and solution, such as:

Wifi Connection Issues

Many wifi connection issues were encountered. To solve this problem, a dedicated task was created to re-connect to wifi if the connection was ever lost.

Conclusion

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Project Video

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Project Source Code

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References

Acknowledgement

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References Used

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Appendix

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