Hardware requirements

  • Mini/micro USB cable

  • KW45B41Z-EVK Board

  • Personal Computer

Board settings

To make the example work, connections needed to be as follows: Note: Be sure to disconnect the 12V adapter on J9, otherwise the transmission will fail. Jumper setting:

MASTER(SPI0)                connect to      SLAVE(SPI0)
Pin Name   Board Location                   Pin Name    Board Location
SOUT       J2 pin 2                         SIN         J1 pin 2
SIN        J1 pin 2                         SOUT        J2 pin 2
SCK        J1 pin 5                         SCK         J1 pin 5
PCS0       J1 pin 1                         PCS0        J1 pin 1

Other jumpers keep default configuration.

Prepare the Demo

  1. Connect a mini USB cable between the PC host and the OpenSDA USB port on the board.

  2. Open a serial terminal on PC for OpenSDA 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 lines are printed to the serial terminal when the demo program is executed.

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