Overview
The lpi2c_interrupt_b2b_transfer_master example shows how to use lpi2c driver as master to do board to board transfer with interrupt:
In this example, one lpi2c instance as master and another lpi2c instance on the other board as slave. Master sends a piece of data to slave, and receive a piece of data from slave. This example checks if the data received from slave is correct.
Toolchain supported
IAR embedded Workbench 9.30.1
MCUXpresso 11.6.0
Hardware requirements
Type-C USB cable
FRDM-MCXN947 board
Personal Computer
Board settings
To make the example work, connections needed to be as follows: Jumper setting:
MASTER(LPI2C2) connect to SLAVE(LPI2C2)
Pin Name Board Location Pin Name Board Location
SCL J2 pin 20 SCL J2 pin 20
SDA J2 pin 18 SDA J2 pin 18
GND J2 pin 14 GND J2 pin 14
Other jumpers keep default configuration.
Prepare the Demo
Connect the type-c and mini USB cable between the PC host and the USB ports on the board.
Open a serial terminal on PC for the 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
The following lines are printed to the serial terminal when the demo program is executed.
LPI2C board2board interrupt example -- Master transfer.
Master will send data :
0x 0 0x 1 0x 2 0x 3 0x 4 0x 5 0x 6 0x 7
0x 8 0x 9 0x a 0x b 0x c 0x d 0x e 0x f
0x10 0x11 0x12 0x13 0x14 0x15 0x16 0x17
0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x1e 0x1f
Receive sent data from slave :
0x 0 0x 1 0x 2 0x 3 0x 4 0x 5 0x 6 0x 7
0x 8 0x 9 0x a 0x b 0x c 0x d 0x e 0x f
0x10 0x11 0x12 0x13 0x14 0x15 0x16 0x17
0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x1e 0x1f
End of LPI2C example .