Overview
========
The i2c_interrupt_b2b_transfer_master example shows how to use i2c driver as master to do board to board transfer 
with interrupt:

In this example, one i2c instance as master and another i2c 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  8.32.3
- Keil MDK  5.27
- GCC ARM Embedded  8.2.1
- MCUXpresso  11.0.0

Hardware requirements
=====================
- Micro USB cable
- Two LPCXpresso55s69 boards
- Personal Computer

Board settings
==============
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
MASTER_BOARD        CONNECTS TO         SLAVE_BOARD
Pin Name   Board Location     Pin Name   Board Location
I2C_SCL    P17-1              I2C_SCL    P17-1
I2C_SDA    P17-3              I2C_SDA    P17-3
GND        P17-7              GND        P17-7 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Prepare the Demo
================
1. Connect a micro USB cable between the PC host and the LPC-Link USB port (P6) on the board.
2. Open a serial terminal on PC for JLink 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. 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 message shows in the terminal if the example runs successfully.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~
I2C 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 I2C example .
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Customization options
=====================

