Hardware requirements

  • Mini USB cable

  • Two FRDM-K32L3A6 boards

  • Personal Computer

Board settings

SPI two board: Transfer data from one board instance to another board’s instance. To make lpspi example work(M4), connections needed to be as follows: SPI0 pins are connected with SPI0 pins of another board

INSTANCE0(SPI0)     CONNECTS TO         INSTANCE0(SPI0)
Pin Name   Board Location     Pin Name  Board Location
SOUT        J2 pin 8            SIN       J2 pin 10
SIN         J2 pin 10           SOUT      J2 pin 8
SCK         J2 pin 12           SCK       J2 pin 12
PCS2        J2 pin 6            PCS2      J2 pin 6
GND         J2 pin 14           GND       J2 pin 14

To make lpspi example work(M0), connections needed to be as follows: SPI3 pins are connected with SPI3 pins of another board

INSTANCE3(SPI3)     CONNECTS TO         INSTANCE3(SPI3)
Pin Name   Board Location     Pin Name  Board Location
SOUT        J1 pin 2            SIN       J1 pin 6
SIN         J1 pin 6            SOUT      J1 pin 2
SCK         J3 pin 5            SCK       J3 pin 5
PCS1        J3 pin 9            PCS1      J3 pin 9
GND         J2 pin 14           GND       J2 pin 14

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.

 Slave example is running...
This is LPSPI slave edma transfer completed callback. 

This is LPSPI slave edma transfer completed callback. 


 Slave receive:
      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...