Hardware requirements

  • Mini USB cable

  • Two FRDM-K22F boards

  • Personal Computer

Board settings

SPI one board: Transfer data from one instance to anther instance on the other board. Note: Please separate the connected wires(CLK wire is important), if not, mixed wires may caused electromagnetic interference and data will transfer error.

  Master Board                           Slave Board
INSTANCE0(SPI0)     CONNECTS TO         INSTANCE1(SPI1)
Pin Name   Board Location     Pin Name  Board Location
SIN        J1 pin 11           SOUT      J1 pin 16
SOUT       J1 pin 16           SIN       J1 pin 11
SCK        J1 pin 15           SCK       J1 pin 15
PCS0       J24 pin 9           PCS0      J24 pin 9
GND        J2-14               GND       J2-14

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. Reset the SoC and run the project.

Running the demo

When the demo runs successfully, the log would be seen on the OpenSDA terminal like:

DSPI CMSIS driver board to board interrupt example.

 Slave example is running...
This is DSPI_SlaveSignalEvent_t
Slave receive data from master has completed!
This is DSPI_SlaveSignalEvent_t
Slave transmit data to master has completed!

 Slave receive:
      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

 Slave example is running...