Hardware requirements

  • Mini/micro USB cable

  • Two EVK-MIMXRT1050 boards

  • Personal Computer

Board settings

Weld 0Ω resistor to R278,R279,R280,R281.

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        J24 pin 4           SIN       J24 pin 5
SIN         J24 pin 5           SOUT      J24 pin 4
SCK         J24 pin 6           SCK       J24 pin 6
PCS0        J24 pin 3           PCS0      J24 pin 3 
GND         J24 pin 7           GND       J24 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 edma example.
This example use one board as master and another as slave.
Master and slave uses EDMA way. Slave should start first.
Please make sure you make the correct line connection. Basically, the connection is:
LPSPI_master --  LPSPI_slave
   CLK       --    CLK
   PCS       --    PCS
   SOUT      --    SIN
   SIN       --    SOUT
   GND       --    GND

 Master transmit:

  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
This is LPSPI master edma transfer completed callback.

This is LPSPI master edma transfer completed callback.

LPSPI transfer all data matched!

 Master 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

 Press any key to run again