Hardware requirements

• Mini USB cable

• Two FRDM-MCXN947 boards

• Personal Computer

Board settings

MASTER(LPI2C2)                connect to        SLAVE(LPI2C2)
Pin Name    Board Location                      Pin Name    Board Location
SCL         J2 pin 20                           SCL         J2 pin 20
SDA         J2 pin 18                           SDA         J2 pin 18
GND         J2 pin 14                           GND         J2 pin 14

Prepare the Demo

1. Connect a type-c USB cable between the PC host and the MCU-Link USB port on the board.

2. Open a serial terminal on PC for JLink serial device with these settings:

   • 115200 baud rate

   • 8 data bits

   • No parity

   • One stop bit

   • No flow control

3. Download the program to the target board.

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

Running the demo

The following message shows in the terminal if the example runs successfully.

CMSIS LPI2C board2board interrupt example -- Master transfer.
Master will send data :
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  
0x10  0x11  0x12  0x13  0x14  0x15  0x16  0x17  
0x18  0x19  0x1a  0x1b  0x1c  0x1d  0x1e  0x1f  

Receive sent data from slave :
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  
0x10  0x11  0x12  0x13  0x14  0x15  0x16  0x17  
0x18  0x19  0x1a  0x1b  0x1c  0x1d  0x1e  0x1f  


End of LPI2C example .