Hardware requirements
USB-C cable
FRDM-MCXC242 board
Personal Computer
Board settings
The i2c_polling example is configured 2 instances I2C , one as I2C master , another as I2C slave. The connection should be set as following:
J4-12 , J2-20 connected
J4-10 , J2-18 connected
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.
I2C example – MasterFuntionalInterrupt_SlaveInterrupt. 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
Slave received 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
This time , slave will send data: : 0xff 0xfe 0xfd 0xfc 0xfb 0xfa 0xf9 0xf8 0xf7 0xf6 0xf5 0xf4 0xf3 0xf2 0xf1 0xf0 0xef 0xee 0xed 0xec 0xeb 0xea 0xe9 0xe8 0xe7 0xe6 0xe5 0xe4 0xe3 0xe2 0xe1 0xe0
Master received data : 0xff 0xfe 0xfd 0xfc 0xfb 0xfa 0xf9 0xf8 0xf7 0xf6 0xf5 0xf4 0xf3 0xf2 0xf1 0xf0 0xef 0xee 0xed 0xec 0xeb 0xea 0xe9 0xe8 0xe7 0xe6 0xe5 0xe4 0xe3 0xe2 0xe1 0xe0
End of I2C example .