Hardware requirements

  • Mini/micro USB cable

  • Two FRDM-IMXRT1186 boards

  • Personal Computer

Board settings

Change Jumper J31 from 1-2 to 2-3, Jumper J35 from 1-2 to 2-3. LPI2C one board:

  • Transfer data from MASTER_BOARD to SLAVE_BOARD of LPI2C interface, LPI2C3 pins of MASTER_BOARD are connected with LPI2C3 pins of SLAVE_BOARD

MASTER_BOARD        CONNECTS TO         SLAVE_BOARD
Pin Name     Board Location     Pin Name     Board Location
LPI2C3_SCL   J51-12             LPI2C3_SCL   J51-12
LPI2C3_SDA   J51-10             LPI2C3_SDA   J51-10
GND          J51-1              GND          J51-1

Prepare the Demo

  1. Connect a mini USB cable between the PC host and the OpenSDA USB port on the 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:

LPI2C board2board polling 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 .