Hardware requirements

  • Micro USB cable

  • two MIMX8ULP-EVK/EVK9 boards

  • J-Link Debug Probe

  • 5V power supply

  • Personal Computer

Board settings

Remove R139, R159 and populate R140, R158 on both base boards.

SPI one board: Transfer data from one board instance to another board’s instance. SPI1 pins are connected with SPI1 pins of another board

INSTANCE0(SPI1)     CONNECTS TO         INSTANCE0(SPI1)
Pin Name   Board Location     Pin Name  Board Location
SPI1_SCK    J23 pin 4            SPI1_SCK  J23 pin 4
SPI1_SIN    J23 pin 2            SPI1_SOUT J23 pin 3
SPI1_SOUT   J23 pin 3            SPI1_SIN  J23 pin 2
SPI1_PCS0   J23 pin 1            SPI1_PCS0 J23 pin 1
GND                             GND

Prepare the Demo

  1. Connect 5V power supply and J-Link Debug Probe to the board, switch SW10 to power on the board.

  2. Connect a micro USB cable between the host PC and the J17 USB port on the target board.

  3. Open a serial terminal with the following settings:

    • 115200 baud rate

    • 8 data bits

    • No parity

    • One stop bit

    • No flow control

  4. Download the program to the target board.

  5. Either cold boot your board or launch the debugger in your IDE to begin running the example.

Running the demo

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

LPSPI CMSIS driver board to board interrupt example.
This example use one board as master and another as slave.
Master and slave uses interrupt 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