Hardware requirements

  • Mini USB cable

  • MIMXRT700-EVK board

  • Personal Computer

Board settings

  1. Make sure JP12 is installed

  2. SPI two boards: Transfer data from one board instance to another board’s instance. SPI14 pins are connected with SPI14 pins of another board

INSTANCE0(SPI14)     CONNECTS TO         INSTANCE0(SPI14)
Pin Name   Board Location           Pin Name  Board Location
SOUT        J20 pin 3                   SIN       J20 pin 5
SIN         J20 pin 5                   SOUT      J20 pin 3
SCK         J20 pin 7                   SCK       J20 pin 7
PCS0        J20 pin 1                   PCS0      J20 pin 1
GND         J20 pin 9                   GND       J20 pin 9

Prepare the Demo

  1. Connect a mini USB cable between the PC host and the MCU-Link USB port on the board.

  2. Open a serial terminal on PC for MCU-Link 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 MCU-Link terminal like:

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