Hardware requirements

  • Mini USB cable

  • FRDM-MCXN236 board

  • Personal Computer

Board settings

LPSPI:

	MASTER           connect to           SLAVE
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
PCS0       J2 Pin 6           PCS0        J2 Pin 6
GND        J2 pin 14          GND         J2 pin 14

Prepare the Demo

  1. Connect a mini USB cable between the PC host and the MCU-Link USB port on the board.

  2. Open a serial terminal on PC for MCU-Link 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 MCU-Link terminal like:

LPSPI CMSIS driver board to board edma example.
This example use one board as master and another as slave.
Master and slave uses EDMA 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
This is LPSPI_MasterSignalEvent_t
Master transmit data to slave has completed!
This is LPSPI_MasterSignalEvent_t
Master receive data from slave has completed!
 
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

 Input any char to run again