Hardware requirements

  • Mini/micro USB cable

  • EVK-MIMXRT1064 board

  • Personal Computer

Board settings

Weld 0Ω resistor to R278,R279,R280,R281.

LPSPI:

       MASTER           connect to           SLAVE
Pin Name   Board Location     Pin Name    Board Location
SOUT       J24-4                SIN       J24-5
SIN        J24-5                SOUT      J24-4
SCK        J24-6                SCK       J24-6
PCS0       J24-3                PCS0      J24-3
GND        J24-7                GND       J24-7

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

When the example runs successfully, you can see the similar information from the terminal as below.

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