Hardware requirements

  • Micro USB cable

  • Two LPCXpresso55S16 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       J9    pin 11       MISO       J9    pin 11
MOSI       J9    pin 9        MOSI       J9    pin 9
SCK        J9    pin 13       SCK        J9    pin 13
SSEL1      J9    pin 2        SSEL1      J9    pin 2
GND        J9    pin 8        GND        J9    pin 8

The jumper setting: Default jumpers configuration does not work, you will need to add JP20 and JP21 (JP22 optional for ADC use)

Prepare the Demo

  1. Connect a micro USB cable between the PC host and the LPC-Link USB port (J1) 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!