Hardware requirements

  • Type-C USB cable

  • MCX-W72-EVK Board

  • Personal Computer

Board settings

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

MASTER(LPSPI0)              connect to      SLAVE(FlexIO SPI)
Pin Name   Board Location                   Pin Name    Board Location
SOUT       J2 pin 13                        SOUT        J1 pin 7
SIN        J2 pin 11                        SIN         J1 pin 13
SCK        J2 pin 9                         SCK         J1 pin 15
PCS0       J2 pin 15                        PCS0        J1 pin 5

Prepare the Demo

  1. Connect a USB cable between the host PC and the EVK board J14.

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

Running the demo

The log below shows the output of the demo in the terminal window:

LPSPI Master interrupt - FLEXIO SPI Slave interrupt example start.
This example use one lpspi instance as master and one flexio spi slave on one board.
Master and slave are both use interrupt way.
Please make sure you make the correct line connection. Basically, the connection is: 
LPSPI_master -- FLEXIO_SPI_slave   
   CLK      --    CLK  
   PCS      --    PCS  
   SOUT     --    SIN  
   SIN      --    SOUT 
This is FLEXIO SPI slave call back.
LPSPI master <-> FLEXIO SPI slave transfer all data matched!

End of Example.