I2C_interrupt
=============

Function description:
---------------------
This demo shows the **I2Cn** master and **I2Cm** slave transmitting, receiving and end of transmit interrupt in cpu mode. 

Test result:
------------
If the data of receiving is equal to transmitting, and corresponding interrupt is triggered, print pass, if not print fail.

IO connection:
--------------
+-----------------+------------------+
| PAD             |    PAD           |
+=================+==================+
| pad_i2cn_scl    | pad_i2cm_scl     |
+-----------------+------------------+
| pad_i2cn_sda    | pad_i2cm_sda     |
+-----------------+------------------+

.. Note::
    The 'm' and 'n' in "i2cm" and "i2cn" indicate the peripheral number.