Hardware requirements

  • Mini/micro USB cable

  • EVK-MIMXRT1020 board

  • Personal Computer

Board settings

The lpspi_loopback demo shows how the lpspi do a loopback transfer, LPSPImaster will transmit data to itself, so please connect the SOUT pin to SIN pin directly.

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

Pin Name  Board Location   			    Pin Name  Board Location
SOUT        J19-4           connect to    SIN        J19-5

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:


***LPSPI Loopback Demo***

LPSPI loopback test pass!!!

Note: To debug in qspiflash, following steps are needed:

  1. Select the flash target and compile.

  2. Set the SW8: 1 off 2 off 3 on 4 off, then power on the board and connect USB cable to J23.

  3. Start debugging in IDE.

    • Keil: Click “Download (F8)” to program the image to qspiflash first then clicking “Start/Stop Debug Session (Ctrl+F5)” to start debugging.