MCUXpresso SDK Documentation
Open on Repo Open an Issue
Source (.md/.rst) Page PDF (.pdf)

dspi_interrupt_b2b_slave

dspi_interrupt_b2b_slave#

Overview#

The dspi_interrupt_b2b example shows how to use DSPI driver in interrupt way:

In this example , we need two boards , one board used as DSPI master and another board used as DSPI slave. The file ‘dspi_interrupt_b2b_slave.c’ includes the DSPI slave code. This example does not use the transactional API in DSPI driver. It’s a demonstration that how to use the interrupt in KSDK driver.

  1. DSPI master send/received data to/from DSPI slave in interrupt . (DSPI Slave using interrupt to receive/send the data)

Supported Boards#

FRDM-K22F
Hardware requirements

  • Mini USB cable

  • Two FRDM-K22F boards

  • Personal Computer

Board settings

SPI one board: Transfer data from one instance to anther instance on the other board. Note: Please separate the connected wires(CLK wire is important), if not, mixed wires may caused electromagnetic interference and data will transfer error.

  Master Board                           Slave Board
INSTANCE0(SPI0)     CONNECTS TO         INSTANCE1(SPI1)
Pin Name   Board Location     Pin Name  Board Location
SIN        J1 pin 11           SOUT      J1 pin 16
SOUT       J1 pin 16           SIN       J1 pin 11
SCK        J1 pin 15           SCK       J1 pin 15
PCS0       J24 pin 9           PCS0      J24 pin 9
GND        J2-14               GND       J2-14
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:

DSPI board to board functional interrupt example.

 Slave example is running...

 Slave receive below data in 1st round transfer:
      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

 Slave example is running...
Contents