SBOA444 November   2020 TMCS1100

 

  1.   Trademarks
  2. 1Introduction
  3. 2Implementation Block Diagram
  4. 3Hardware Implemenation
    1. 3.1 Analog Inputs
      1. 3.1.1 Voltage Measurement Analog Front End
      2. 3.1.2 Current Measurement Analog Front End
    2. 3.2 MSP432 LaunchPad Connections
    3. 3.3 PCB Layout Recommendations
  5. 4How to Implement Software for Metrology Testing
    1. 4.1 Setup
      1. 4.1.1 Clock
      2. 4.1.2 UART Setup for GUI Communication
      3. 4.1.3 Real-Time Clock (RTC)
      4. 4.1.4 Direct Memory Access (DMA)
      5. 4.1.5 ADC Setup
    2. 4.2 Foreground Process
      1. 4.2.1 Formulas
        1. 4.2.1.1 Standard Metrology Parameters
        2. 4.2.1.2 Power Quality Formulas
    3. 4.3 Background Process
      1. 4.3.1 per_sample_dsp( )
        1. 4.3.1.1 Voltage and Current ADC Samples
        2. 4.3.1.2 Pure Waveform Samples
        3. 4.3.1.3 Frequency Measurement and Cycle Tracking
      2. 4.3.2 LED Pulse Generation
      3. 4.3.3 Phase Compensation
  6. 5Metrology Accuracy Testing
    1. 5.1 Test Setup
    2. 5.2 Results
  7. 6Schematics
  8. 7References

4.1.2 UART Setup for GUI Communication

The MSP432 MCU has a port mapping controller that allows a flexible mapping of digital functions to port pins. The set of digital functions that can be ported to other pins is dependent on the device. The port mapping controller is specifically used in this design to output the UART signals that communicate to the PCU GUI.

Using the port mapping controller, the following mappings are used:

  • PMAP_UCA0RXD (EUSCIA0 UART RX) -> Port 2.3 (connected to the RX input of the TIDA-00163 board)

  • PMAP_UCA0TXD(EUSCIA0 UART TX)->Port 2.5 (connected to the TX input of the TIDA-00163 board)

The MSP432 is configured to communicate to the PC GUI through the RS-232 connection on the TIDA-00163 board. The MSP432 communicates to the PC GUI using a UART module configured for 8N1 at 9600 baud.