Hardware requirements
Mini USB cable
FRDM-K32L3A6 board
Personal Computer
Board settings
To make the example work, connections needed to be as follows:
MASTER(SPI0) connect to SLAVE(SPI3)
Pin Name Board Location Pin Name Board Location
SOUT J2 pin 8 SIN J1 pin 6
SIN J2 pin 10 SOUT J1 pin 2
SCK J2 pin 12 SCK J3 pin 5
PCS2 J2 pin 6 PCS1 J3 pin 9
Prepare the Demo
Connect a mini USB cable between the PC host and the OpenSDA USB port on the board.
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
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 example runs successfully, you can see the similar information from the terminal as below.
LPSPI functional interrupt example start.
This example use one lpspi instance as master and another as slave on one board.
Master uses interrupt way and slave uses interrupt way.
Note that some LPSPI instances interrupt is in INTMUX ,you should set the intmux when you porting this example accordingly
Please make sure you make the correct line connection. Basically, the connection is:
LPSPI_master -- LPSPI_slave
CLK -- CLK
PCS -- PCS
SOUT -- SIN
SIN -- SOUT
LPSPI transfer all data matched!
End of example.