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Software Progress

Design iterations and timing diagram for temperature and humidity sensing software progress. Implement smart enabling for power conservation in CC430, with iterations and future implementation plans. Involves modular uMavrk reference kit and system-level design.

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Software Progress

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  1. Software Progress Timing diagram ① P.2.4 <= 1s ① P. 233 <= 2s ① ① ① Wake from Sleep in 15 minute interval Wake Up CC430 3.3V output from GPIO Turn on sensor board Temperature Output P2.4 : 0 ~ 3V ADC conversion P2.2 : 0 ~ 3V Temperature Output Read Digital input Temperature : Digital input -> Resistance of RTD calculated -> Converted to Temperature Humidity : Convert to Temperature & Humidity Wireless transmission MAVRK Mother Board GUI Sleep CC430

  2. Temperature Calculation • Math

  3. Software Design Iterations • Design Iteration 1:Use Ti’s board + Software • Design Iteration 2:Modify code to interface correctly with new board. Also, send out correct enable signals to the correct pins. • Design Iteration 3:Apply mathematical equations to correct data interpretation • Design Iteration 4:Implement smart enabling to conserve power.

  4. Smart Enabling Humidity Sensing ************************** Enable p3.2 (5v rail on) 200us wait 1 second Enable p3.3 (opa 364 on) 20us Wait 1 minute for humidity sensor's response time Sample humidity data Disable p3.3 (opa 364 off) 1us wait 1 second Disable p3.2 (5v rail off) 200us wait 1 second Go back to sleep • Timing Diagram • Sleep - 15 minutes • Interrupt • Temperature Sensing • ************************** • Enable p3.0 (3.3V rail on) 200 us • wait 1 second • Enable p3.5 (wheatstone switch on) 7.5ns • wait 1 second • Enable p3.7 (opa364 on) 20us • wait 1 second • Sample temperature data • disable p3.7 (opa364 off) 1us • wait 1 second • Disable p3.5 (Wheatstone switch off) 12.5ns • wait 1 second • Disable p3.0 (3.3V rail off) 200us • wait 1 second

  5. Future Implementation • Add more software features • Database on PC for packet store. • Additional GUI application for graph display of data • Accept inputs from several uMavrks • Implementation of averaging algorithm • Indication of completion of curing.

  6. What is the Mavrk? • Modular and versatile reference kit. • Used for rapid prototyping. • Modules to encapsulate functionality. • Less Component level interaction. • More System level Design.

  7. uMavrk • uMavrk is an extension to the Mavrk for remote monitoring. • Lower power (<10 ma) • Enabled for RF connection back to the Mavrk

  8. Example- Rapid prototyping of our own circuit • Dc to Dc boost converter • Temperature Circuit • Amplification Circuit • What if TI had modules for all three? • Program firmware to handle interaction between all three.

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