This is the documentation for the latest (main) development branch of mcuxpresso sdk. If you are looking for the documentation of previous releases, use the drop-down menu on the left and select the desired version.

Hardware requirements

  • Mini USB cable

  • FRDM-K32L2B board

  • Personal Computer

Board settings

SPI one board:

  • Transfer data loopback with SPI0 module, only connect MOSI pin to MISO pin of SPI0 on board

INSTANCE0   
Pin Name   Board Locatio          Pin Name    Board Locatio
MOSI       J1 pin 9      <==>     MISO          J1 pin 11

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:

SPI FreeRTOS example start.
This example use one SPI instance in master mode
to transfer data through loopback.
Please be sure to externally connect together SOUT and SIN signals.
   SOUT     --    SIN
SPI transfer completed successfully.
Data verified ok.