Hardware requirements

  • Micro USB cable

  • Two LPCXpresso55S06 boards

  • Personal Computer

Board settings

Connect SPI master on board to SPI slave on other board

    Master_board(SPI3)           Slave_board(SPI3)                          
Pin Name   Board Location     Pin Name   Board Location                     
MISO       J12   pin 2        MISO       J12   pin 2
MOSI       J12   pin 1        MOSI       J12   pin 1
SCK        J10   pin 16       SCK        J10   pin 16
SSEL0      J10   pin 14       SSEL0      J10   pin 14
GND        J9    pin 8        GND        J9    pin 8

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.

SPI CMSIS driver board to board dma example.
This example use one board as master and another as slave.
Master and slave uses DMA way. Slave should start first. 
Please make sure you make the correct line connection. Basically, the connection is: 
SPI_master -- SPI_slave   
   CLK      --    CLK  
   PCS      --    PCS 
   MOSI     --    MOSI 
   MISO     --    MISO 
   GND      --    GND 

 Master transmit:

  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
 
SPI transfer all data matched! 

 Master received:

  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