SWRA625B August   2018  – February 2020 CC1352P , CC1352R , CC2652P , CC2652R , CC2652R7 , CC2652RSIP

 

  1.   Z-Stack End Device Power Consumption Measurement With the SimpleLink Wireless MCU Family
    1.     Trademarks
    2. 1 Introduction
    3. 2 Abbreviations and Acronyms
    4. 3 System Overview
      1. 3.1 Hardware:LAUNCHXL-CC1352P-2, LAUNCHXL-CC26X2R1
      2. 3.2 Software: Z-Stack
        1. 3.2.1 Z-Stack Development Environment
    5. 4 Measurement Setup
      1. 4.1 Instrumentation
      2. 4.2 Software Setup
        1. 4.2.1 Programming
        2. 4.2.2 ZC Node
        3. 4.2.3 ZED Node
        4. 4.2.4 GPD Node
        5. 4.2.5 Commissioning
    6. 5 Measurements
      1. 5.1 Measurements for Regular ZED
      2. 5.2 Measurements for Green Power Device
      3. 5.3 Measurements Using the EnergyTrace Tool
    7. 6 Application to a Practical Use Case
      1. 6.1 Estimation for Usage Scenario
        1. 6.1.1 Usage Scenario 1
      2. 6.2 Usage Scenario 2
    8. 7 Batteryless Green Power Device
    9. 8 Summary
    10. 9 References
  2.   Revision History

7 Batteryless Green Power Device

One of the greatest benefits of utilizing the Green Power feature is the capability to operate from energy harvesting hardware and therefore not require a power supply in order to send Green Power Data Packets (GPDPs). An example of this is shown in Figure 18.

LAUNCHXL-CC26X2R1_TIDA-00690.jpgFigure 18. LAUNCHXL-CC26x2R1 LaunchPad Connected to TIDA-00690 Reference Design PCB

This setup uses the TIDA-00690 design guide [9] that offers an energy harvesting switch solution. The switch, build like a linear dynamo, transforms the mechanical energy into electrical energy to power the CC2652R long enough to send a few GPDPs over-the-air before shutting down. There are a few modifications that can be done to the gpd_switch project in order to optimize a batteryless design:

  • Add BATTERYLESS_DEVICE to the predefine symbols and set the GPDF_FRAME_DUPLICATES to 3 or more
  • Remove predefine symbols NV_RESTORE and NV_INIT
  • Comment out VIMSConfigure(); from the main(); function in the file Application/StartUp/main.c
  • In the file Application/gp_sw.c, comment out Board_Key_initialize(); and Board_Led_initialize(); inside the gpdSampleSw_initialization(); function as well as ApiMac_mlmeSetReqUint8 and gp_appNvInit from the gpdSampleSw_Init function

Note that the number of GPDPs sent per event is dependent upon the robustness and reliability of the energy harvesting hardware and firmware. The TIDA-00690 hardware was capable of providing enough energy to the CC2652R on the LaunchPad for 2 to 3 GPDPs per switch press when the gpd_switch project from the SimpleLink CC13X2/CC26X2SDK v3.10 was used with the above optimizations.