Hardware requirements

  • Micro USB cable

  • LPCXpresso51U68 board

  • Personal Computer

Board settings

Populate jumper JP3. Connect SPI master on board to SPI slave on other board

Master - SPI3                 CONNECTS TO      Slave - SPI3
Pin Name   Board Location                      Pin Name  Board Location
MISO       J4 pin 3                            MISO       J4 pin 3
MOSI       J4 pin 2                            MOSI       J4 pin 2
SCK        J4 pin 4                            SCK        J4 pin 4
PCS2       J4 pin 7                            PCS2       J4 pin 7

Prepare the Demo

  1. Connect a micro USB cable between the PC host and the LPC-Link USB port (J6) 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