Reset
==========

Function description:
---------------------
    This demo shows **IWDG** reset system.
    After configuring the iwdg, the system will be reset because the dog feeding is not carried out. 
    The reset flag is detected after the code runs again to judge whether the test is normal.

Test result:
------------
    Not feed **IWDG**,if success printf pass and system reset.
    
IO connection:
--------------
NONE