1 / 13

The Guardian: Refrigerator Contents Tracker Bryant Lampano

[Type the company name]. 2011-2012. The Guardian: Refrigerator Contents Tracker Bryant Lampano. Western Washington University Electronics Engineering Technology. System Software Design Overview. General System Software Design Specifics on Software Design Kernal Tasks CPU Load

makani
Download Presentation

The Guardian: Refrigerator Contents Tracker Bryant Lampano

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. [Type the company name] 2011-2012 The Guardian:Refrigerator Contents Tracker Bryant Lampano Western Washington University Electronics Engineering Technology

  2. System Software Design Overview • General System Software Design • Specifics on Software Design • Kernal • Tasks • CPU Load • Dataflow Diagram • Module, Tasks, Function and Data list WWU Electronics Engineering Technology 2012

  3. General System Software Design • MCU: Freescale MC9S12DP512 16-bit. • 512KB Flash EEPROM, 14KB RAM, 4KB EEPROM. • Bus frequency: 24MHz. • Maximum of 25MHz with 16MHz crystal. • Approximate memory requirements: • ROM: ~12KB. • Includes µC/OS-II, final program and data storage. • RAM: ~1KB. • Includes parameters and variables. • Resources used: • 1 SPI port, 1 SCI port, I2C port, and 8 GPIO . WWU Electronics Engineering Technology 2012

  4. System Software Design: Kernal • Kernal: µC/OS-II maintained by Micrium Inc. • Pre-emptive real-time kernal. • Resources used: • Semaphores, mutexes, time delays. • Tick period: 1ms • Task total: 4 • StartTask, KeyTask, UITask, RTCTask. WWU Electronics Engineering Technology 2012

  5. System Software Design: Tasks • StartTask • Enables all resources for Kernals, MCU and peripheral initializations. • 4th priority. • Period: Once. • Execution Time: 10ms • KeyTask • Monitors keypad checking for new key press from the user • 5th priority. • Period: 10ms. • Execution Time: 0.1ms WWU Electronics Engineering Technology 2012

  6. System Software Design: Tasks • RTCTask • Provides accurate real time clock data used for date tagging with items • 6thpriority. • Period: 20ms • Execution Time: 10ms • UITask • Gathers and stores all information from the users input • 7thpriority. • Period: 200ms. • Execution Time: 50ms WWU Electronics Engineering Technology 2012

  7. System Software Design: Kernal • Maximum CPU Load: 31% • Lmax • Average CPU Load: 15.5% WWU Electronics Engineering Technology 2012

  8. Dataflow Diagrams: KeyTask WWU Electronics Engineering Technology 2012

  9. Dataflow Diagrams: Scan() WWU Electronics Engineering Technology 2012

  10. Dataflow Diagrams: LCD Module WWU Electronics Engineering Technology 2012

  11. Dataflow Diagrams: System WWU Electronics Engineering Technology 2012

  12. Modules, Tasks, Functions and Data List WWU Electronics Engineering Technology 2012

  13. Questions ? WWU Electronics Engineering Technology 2012

More Related