Hardware requirements
Micro USB cable
MIMXRT700-EVK board
Personal Computer
Board settings
To make the example work, connections needed to be as follows:
SLAVE(LPSPI16) connect to MASTER(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
Connect a mini USB cable between the PC host and the MCU-LINK USB port on the board.
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
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, the log would be seen on the terminal:
FLEXIO Master - LPSPI Slave interrupt example start.
This example use one flexio spi as master and one lpspi instance as slave on one board.
Master and slave are both use interrupt way.
Please make sure you make the correct line connection. Basically, the connection is:
FLEXIO_SPI_master -- LPSPI_slave
CLK -- CLK
PCS -- PCS
SOUT -- SIN
SIN -- SOUT
This is LPSPI slave call back.
FLEXIO SPI master <-> LPSPI slave transfer all data matched!
End of example.