SLAAEM0 June   2024 MSPM0C1104 , MSPM0C1104 , MSPM0L1105 , MSPM0L1105 , PGA460 , PGA460

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Hardware Introduction
  6. 3Software Introduction
    1. 3.1 MCU Initialization
    2. 3.2 PGA460 Initialization and Configuration
    3. 3.3 Distance Detection
  7. 4Evaluation Steps

2 Hardware Introduction

To evaluate the solution based on PGA460 and MSPM01104, the following hardware elements are required:

  • BOOSTXL-PGA460 (PGA460-Q1 ultrasonic sensor signal conditioning evaluation module with transducers)
  • LP-MSPM0C1104 (MSPMC1104 LaunchPad™ development kit for 24-MHz Arm® Cortex®-M0+ MCU)
  • A computer with Windows® 7 or later, and .NET Framework 4.5
  • Micro-USB to USB cable (included with the purchase of LP-MSPM0C1104)

In the solution, MSPM0C1104 acts as the main controller to configure PGA460 via SPI, and sends the measurement results to PC via universal/asynchronous receiver/transmitter (UART). Figure 2-1 shows the simply system block diagram.

PGA460, MSPM0 System Block Diagram Figure 2-1 System Block Diagram

PGA460-Q1 support multiple communication interfaces, including USART, TCI, SPI and One-Wire UART. USART Synchronous Mode is identical to a SPI without a chip select because the addressing is handled by the three-bit UART_ADDR value to enable up to eight device son a single bus. In this solution, the three-wire SPI communication interface was used on MSPM0C1104 to control PGA460. To enable SPI communication module in PGA460, pull down P18(COM_P) and pull up P17(COM_S), P37(MHLD), P36(MCS) on PGA460. This is realized by controlling PA2, PA17 and PA23 on MSPM0C1104. The power supply (5V, 3V3, GND) and SPI (MOSI, MISO, Clock) can be connected correspondingly. All the hardware connection between PGA460 EVM and LP-MSPM0C1104 is shown in Table 2-1.

Table 2-1 Hardware Connection
Connection Type Connection Name LP-MSPM0C1104 Pin Number: Pin Name BOOSTXL-PGA460 Pin Number: Pin Name
SPI SPI: MOSI PA18: SPI_PICO P10: MOSI
SPI: MISO PA4: SPI_POCI P9: MISO
SPI: Clock PA11 P34: SCLK_LP
SPI enable COM_PD GND P18: COM_P
COM_SEL PA2 P17: COM_S
MEM_HOLD PA17 P36: MHLD
MEM_CS PA23 P37: MCS
Power connections Power: 3.3V J1:3V3 P1: 3V3
Power: 5V J3:5V P21: 5V
Power: Ground GND P22: GND

The final setup is shown in Figure 2-2.

PGA460, MSPM0 Hardware Setup Figure 2-2 Hardware Setup