TIDUF98 October   2024

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 End Equipment
      1. 1.1.1 Electricity Meter
    2. 1.2 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Highlighted Products
      1. 2.2.1 ADS131M03
      2. 2.2.2 MSPM0L2228
      3. 2.2.3 THVD1400
      4. 2.2.4 ISO6731
      5. 2.2.5 DRV5032
    3. 2.3 Design Considerations
      1. 2.3.1 Design Hardware Implementation
        1. 2.3.1.1 Analog Inputs
          1. 2.3.1.1.1 Voltage Measurement Analog Front End
          2. 2.3.1.1.2 Current Measurement Analog Front End
      2. 2.3.2 Energy Metrology Software
        1. 2.3.2.1 Software Architecture
        2. 2.3.2.2 Setup
          1. 2.3.2.2.1 Clocking Scheme
          2. 2.3.2.2.2 SPI
          3. 2.3.2.2.3 UART Setup for GUI Communication
          4. 2.3.2.2.4 Real-Time Clock
          5. 2.3.2.2.5 LCD Controller
          6. 2.3.2.2.6 Direct Memory Access
    4. 2.4 Hardware, Software, Testing Requirements, and Test Results
      1. 2.4.1 Required Hardware and Software
        1. 2.4.1.1 Cautions and Warnings
        2. 2.4.1.2 Hardware
          1. 2.4.1.2.1 Connections to the Test Setup
          2. 2.4.1.2.2 Power Supply Options and Jumper Settings
        3. 2.4.1.3 Calibration
      2. 2.4.2 Testing and Results
        1. 2.4.2.1 Test Setup
          1. 2.4.2.1.1 Viewing Metrology Readings and Calibration
            1. 2.4.2.1.1.1 Viewing Results From LCD
            2. 2.4.2.1.1.2 Viewing Results From PC GUI
        2. 2.4.2.2 Electricity Meter Metrology Accuracy Testing
        3. 2.4.2.3 Electricity Meter Metrology Accuracy Results
  9. 3Design Files
    1. 3.1 Schematics
    2. 3.2 Bill of Materials
    3. 3.3 PCB Layout Recommendations
      1. 3.3.1 Layout Prints
    4. 3.4 Altium Project
    5. 3.5 Gerber Files
    6. 3.6 Assembly Drawings
  10. 4Related Documentation
    1. 4.1 Trademarks
  11. 5About the Authors

2.3.2 Energy Metrology Software

The metrology software used for testing TIDA-010940 is delivered as a middleware example in the latest MSPM0 SDK, Version 2.02.00.05 or later. There are other middleware examples for MSPM0G3507, supporting both Cost-Effective, 3-Phase CT Electricity Meter Reference Design Using Standalone ADC and Single-Phase and Split-Phase Shunt Energy Metrology Reference Design energy metrology designs.

The MSPM0 Energy Metrology middleware software packages contains hardware abstraction layers which enable communication between an ADC and an ARM®Cortex®-M0+ microprocessor (MCU) and a library of metrology calculations for energy measurements. Also included in the software is a Windows® PC GUI to display the metrology parameters from the TIDA-010940 reference design. This PC GUI can be found in the tools directory under C:\ti\mspm0_sdk_2_02_00_05\tools\metrology_gui.

The resource utilization of TIDA-010940 middleware code example, using TI CCS compiler optimization setting of 2 are:

  • 38,008 Bytes FLASH for Application code
  • 256 Bytes FLASH for calibration data
  • 2,787 Bytes RAM memory

The test data included in this reference design was collected using the MSPM0-SDK middleware code example for the single-phase electricity meter, found at: C:\ti\mspm0_sdk_2_02_00_05\examples\nortos\LP_MSPM0L2228\energy_metrology\single_phase_TIDA_010940_SW