Power Meter


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Power Meter

  1. 1. Team 3 Power Meter James Aitkenhead, Nicole Ogden, Matt Quantz
  2. 2. The Product  Targets customers who want to monitor energy statistics with an easy-to-use graphical interface  Our widget will help you to be more aware of your energy usage, saving you time and money
  3. 3. Mechanical Design
  4. 4. Mechanical Design
  5. 5. Project Management  We used a combination of traditional and agile project management.  It would be very hard to manage a project that has never been done before using a strictly traditional approach (hard to estimate task durations)
  6. 6. Resource Scoping  FPGA  Different versions of Nios II  Software  IP Blocks  Internal Power Supply  Outsourcing Consultants  Other items considered for design
  7. 7. Code Repository  Used TortoiseSVN for Project Version Control  Directory Structure:  C Code  C Scripts  C Test  RTL Code  RTL Scripts  RTL Test  Documentation  This Directory Structure Supports Reusability
  8. 8. Code Reviews  We did not implement formal code reviews  We collaborated between team members for writing and testing code
  9. 9. Benefits of RTL and C Coding Guidelines  Makes Code More Readable  Makes Code More Reusable  Makes Code More Portable  Increases Productivity of Code Reviews  Allows Auto-Documentation (Doxygen)
  10. 10. IP Design and Reuse  IP Component Reuse saves time in a project  Component Reusability should be paramount in a design  Reusability brings the product to market faster
  11. 11. Hardware to Software Interface  A register map is a listing of all the memory registers used in the project, and their address  The register map is used by everyone from design to layout to verification engineers  This makes it important to create the map early in the project  The register map can be created manually, or there is software available to automate the process
  12. 12. Functional Verification  Direct testing was used  Code Coverage was 100%
  13. 13. Cost Estimate (Break-Even Cost) Part Price Fpga 30 Lcd + touch 100 Pcb 30 Case 25 MCP3909 7.50 Power supply 10 Software 1,000,000 Outsourcing consultants Free Engineering time spent Priceless IP blocks used 100 Misc. components 200 Total ~ $500
  14. 14. Lessons Learned  Don’t wait until the last minute to add documentation  Read the datasheets for little “Easter eggs” which could delay progress  Divide tasks more evenly between team members
  15. 15. Roadblocks  We struggled to re-create last quarter’s touch screen interface  We struggled to learn how to use all the project tracking tools effectively  We struggled with the opto-isolator interface between the MCP3909 and the FPGA  The SPI interface was odd to work with
  16. 16. Conclusions  We successfully interfaced with the MCP3909 Evaluation Board  We successfully displayed the measured data on the 16x2 character LCD  This was a fun project with numerous practical applications  With more time, we would implement a wireless data transfer, uploading the data to the Internet, or both  Also with more time we were going to try to implement Ethernet to connect the device to the internet and communicate to websites like: “Google Powermeter,” and “Microsoft hohm;” to relay instant