Hardware requirements

  • Micro USB cable

  • Two LPCXpresso55S28 boards

  • Personal Computer

Board settings

Connect SPI master on board to SPI slave on other board

    Master_board(SPI7)           Slave_board(SPI7)                          
Pin Name   Board Location     Pin Name   Board Location                     
MISO       P17  pin 12          MISO      P17  pin 12
MOSI       P17  pin 10          MOSI      P17  pin 10
SCK        P17  pin 14           SCK      P17  pin 14
SSEL1      P17  pin 1          SSEL1      P17  pin 1
GND        P17  pin 7           GND       P17  pin 7

Prepare the Demo

Note: MCUXpresso IDE project default debug console is semihost

  1. Connect a micro USB cable between the PC host and the LPC-Link USB port (P6) on the board.

  2. Open a serial terminal on PC for JLink 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 message shows in the terminal if the example runs successfully.

CMSIS SPI board2board DMA example -- Slave transfer.


 Slave example is running...


 Slave receive:
      0  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
Succeed!