Hardware requirements

• Micro USB cable

• MIMXRT685-AUD-EVK board

• Personal Computer

Board settings

Make sure JP42 2-3 is connected.

I2C one board:

• Transfer data from MASTER_BOARD to SLAVE_BOARD of I2C interface, I2C4 pins of MASTER_BOARD are connected with I2C4 pins of SLAVE_BOARD

MASTER_BOARD        CONNECTS TO         SLAVE_BOARD
Pin Name   Board Location     Pin Name   Board Location
P0_29       J27-2               P0_29      J27-2
P0_30       J27-1               P0_30      J27-1
GND         J28-7               GND        J28-7

Prepare the Demo

1. Connect a micro USB cable between the PC host and the CMSIS DAP USB port (J5) 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

3. Download the program to the target board.

4. 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.

I2C board2board DMA example -- Slave transfer.


Slave received 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


End of I2C example .