Hardware requirements

  • Type-C USB cable

  • RDM-MCXW72 Board

  • Personal Computer

Board settings

To make the example work, connections needed to be as follows: Jumper setting:

MASTER(SPI1)                connect to      SLAVE(SPI1)
Pin Name   Board Location                   Pin Name    Board Location
SOUT       J2 pin 7                         SIN         J2 pin 6
SIN        J2 pin 6                         SOUT        J2 pin 7
SCK        J2 pin 5                         SCK         J2 pin 5
PCS0       J2 pin 8                         PCS0        J2 pin 8
GND        J2 pin 4                         GND         J2 pin 4

Other jumpers keep default configuration.

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. Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.

Running the demo

The following lines are printed to the serial terminal when the demo program is executed.

LPSPI interrupt board to board (b2b) transfer master example.
This example use one board as master and another as slave.
Master and slave uses interrupt 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
 
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