Hardware requirements

  • USB-C cable

  • FRDM-MCXE247 board

  • Personal Computer

Board settings

The example requires connecting between LPSPI0 pins and LPSPI2 pins The connection should be set as following: MASTER connect to SLAVE Pin Name Board Location Pin Name Board Location SOUT J6 pin 6 SIN J7 pin 5 SIN J6 pin 5 SOUT J7 pin 3 SCK J6 pin 4 SCK J7 pin 7 PCS2 J6 pin 3 PCS1 J7 pin 1

Prepare the Demo

  1. Connect a USB cable between the host PC and the OpenSDA USB port on the target board.

  2. Open a serial terminal with the following settings:

  • 115200 baud rate

  • 8 data bits

  • No parity

  • One stop bit

  • No flow control

  1. Download the program to the target board.

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

Running the demo

When the example runs successfully, the following message is displayed in the terminal:

LPSPI functional interrupt example start.

This example use one lpspi instance as master and another as slave on one board.

Master uses interrupt way and slave uses interrupt way.

Note that some LPSPI instances interrupt is in INTMUX ,you should set the intmux when you porting this example accordingly

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

LPSPI transfer all data matched!

End of example.