Hardware requirements

  • Micro USB cable

  • MIMXRT700-EVK Board

  • Personal Computer

Board settings

To make the example work, connections needed to be as follows:

 Master(LPSPI16) connect to               Slave(FlexIO0)
Pin Name   Board Location            Pin Name  Board Location
SOUT        J22 pin 6         	        SIN       J5 pin 3
SIN         J22 pin 5         	        SOUT      J5 Pin 6
SCK         J22 pin 4        	        SCK       J5 pin 4
PCS0        J22 pin 3        	        PCS       J5 pin 5
GND         J22 pin 8                   GND       J6 pin 7

Prepare the Demo

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

  2. Open a serial terminal with the following 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 log below shows the output of the hello world demo in the terminal window:

LPSPI Master interrupt - FLEXIO SPI Slave edma example start.
This example use one lpspi instance as master and one flexio spi slave on one board.
Master uses interrupt and slave uses edma way.
Please make sure you make the correct line connection. Basically, the connection is: 
LPSPI_master -- FLEXIO_SPI_slave   
   CLK      --    CLK  
   PCS      --    PCS  
   SOUT     --    SIN  
   SIN      --    SOUT 
This is FLEXIO SPI slave call back.
LPSPI master <-> FLEXIO SPI slave transfer all data matched!

End of Example.