Hardware requirements

  • Mini/micro USB cable

  • Two MIMXRT1040-EVK board

  • Personal Computer

Board settings

Weld 0Ω resistor to R346,R350,R356,R362.

SPI one board: Transfer data from one board instance to another board’s instance. SPI0 pins are connected with SPI0 pins of another board

INSTANCE1(LPSPI1)     CONNECTS TO         INSTANCE1(LPSPI1)
Pin Name   Board Location     Pin Name  Board Location
SOUT        J17 pin 4           SIN       J17 pin 5
SIN         J17 pin 5           SOUT      J17 pin 4
SCK         J17 pin 6           SCK       J17 pin 6
PCS0        J17 pin 3           PCS0      J17 pin 3 
GND         J17 pin 7           GND       J17 pin 7

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 on PC for OpenSDA 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. Reset the SoC and run the project.

Running the demo

When the demo runs successfully, the log would be seen on the OpenSDA terminal like:

LPSPI board to board polling example.

 Slave example is running...
This is LPSPI slave transfer completed callback.
It's a successful transfer.

This is LPSPI slave transfer completed callback.
It's a successful transfer.


 Slave received:
      1  2  3  4  5  6  7  8  9  A  B  C  D  E  F 10
     11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20
     21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30
     31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F 40

 Slave example is running...