Hardware requirements

  • USB-C cable

  • FRDM-MCXE247 board

  • Personal Computer

Board settings

LPUART one board: Using instance 1 of LPUART interface to transfer data to itself. TX pin is connected with RX pin.

LPUART1    CONNECTS TO           LPUART1
Pin Name   Board Location        Pin Name  Board Location
TXD        J5-4                  RXD       J5-3

Prepare the Demo

  1. Connect a USB cable between the host PC and the MCU-LINK USB port on the target board.

  2. Open a serial terminal with the following settings:

  • 115200 baud rate

  • 8 data bits

  • No parity

  • One stop bit

  • No flow control

  1. Download the program to the target board.

  2. Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.

Running the demo

When the example runs successfully, the following message is displayed in the terminal:

LPUART 9-bit mode example begins
LPUART is configured with address, only data sent to itself after matched address can be received
LPUART will send first piece of data out:

0x 0  0x 1  0x 2  0x 3  0x 4  0x 5  0x 6  0x 7  
0x 8  0x 9  0x a  0x b  0x c  0x d  0x e  0x f  

LPUART will address itself
LPUART will send the other piece of data out:

0x10  0x11  0x12  0x13  0x14  0x15  0x16  0x17  
0x18  0x19  0x1a  0x1b  0x1c  0x1d  0x1e  0x1f  

LPUART received data:

0x10  0x11  0x12  0x13  0x14  0x15  0x16  0x17  
0x18  0x19  0x1a  0x1b  0x1c  0x1d  0x1e  0x1f  

All data matches!