Hardware requirements

  • Mini/micro USB cable

  • Two EVK-MIMXRT1015 boards

  • Personal Computer

Board settings

Remove R293 SPI one board: Transfer data from one board instance to another board’s instance. SPI1 pins are connected with SPI1 pins of another board

       MASTER           connect to           SLAVE
Pin Name   Board Location     Pin Name    Board Location
SOUT       J19-4                SIN       J19-5
SCK        J19-6                SCK       J19-6
PCS0       J19-3                PCS0      J19-3
GND        J19-7                GND       J19-7

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. Reset the SoC and run the project.

Note: It’s better to use short dupont lines for ideal connection, error may occur if using long lines.

Running the demo

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

LPSPI 3-wire board to board interrupt example.

 Slave example is running...
 Slave starts to receive data from master.
 This is LPSPI slave transfer completed callback. 
 It's a successful transfer. 

Slave board receive data complete!

 Slave received:
     0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F 0x10
     0x11 0x12 0x13 0x14 0x15 0x16 0x17 0x18 0x19 0x1A 0x1B 0x1C 0x1D 0x1E 0x1F 0x20
     0x21 0x22 0x23 0x24 0x25 0x26 0x27 0x28 0x29 0x2A 0x2B 0x2C 0x2D 0x2E 0x2F 0x30
     0x31 0x32 0x33 0x34 0x35 0x36 0x37 0x38 0x39 0x3A 0x3B 0x3C 0x3D 0x3E 0x3F 0x40

Please input any character to continue!
Note that, slave should start first.So, please input character for slave first!

 Slave starts to transmit data to master.
 This is LPSPI slave transfer completed callback. 
 It's a successful transfer. 

Slave transmit data completed.

 Slave example is running...
 Slave starts to receive data from master.

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.