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.. highlight:: c
.. _libmaple-iwdg:
``iwdg.h``
==========
Independent Watchdog (IWDG) support.
.. contents:: Contents
:local:
Usage Note
----------
To use the independent watchdog, first call :c:func:`iwdg_init()` with
the appropriate prescaler and IWDG counter reload values for your
application. Afterwards, you must periodically call
:c:func:`iwdg_feed()` before the IWDG counter reaches 0 to reset the
counter to its reload value. If you do not, the chip will reset.
Once started, the independent watchdog cannot be turned off.
Types
-----
.. doxygenstruct:: iwdg_reg_map
.. doxygenenum:: iwdg_prescaler
Devices
-------
None at this time.
Functions
---------
.. doxygenfunction:: iwdg_init
.. doxygenfunction:: iwdg_feed
Register Map Base Pointers
--------------------------
.. doxygendefine:: IWDG_BASE
Register Bit Definitions
------------------------
Key register
~~~~~~~~~~~~
.. doxygendefine:: IWDG_KR_UNLOCK
.. doxygendefine:: IWDG_KR_FEED
.. doxygendefine:: IWDG_KR_START
Prescaler register
~~~~~~~~~~~~~~~~~~
.. doxygendefine:: IWDG_PR_DIV_4
.. doxygendefine:: IWDG_PR_DIV_8
.. doxygendefine:: IWDG_PR_DIV_16
.. doxygendefine:: IWDG_PR_DIV_32
.. doxygendefine:: IWDG_PR_DIV_64
.. doxygendefine:: IWDG_PR_DIV_128
.. doxygendefine:: IWDG_PR_DIV_256
Status register
~~~~~~~~~~~~~~~
.. doxygendefine:: IWDG_SR_RVU_BIT
.. doxygendefine:: IWDG_SR_PVU_BIT
.. doxygendefine:: IWDG_SR_RVU
.. doxygendefine:: IWDG_SR_PVU
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