Final chunk of register definitions to be pulled up.
Now the "target" files are _only_ defining the list of u(s)arts
available, and any _specific_ functions for that target.
Just small pieces at a time to make it easy to see what's happening.
Taking definitions currently implemented in both f0/f3 headers and
making combined, documented versions in the -v2 header.
Use the usart-common base plus the usart-v2 code, instead of private
implementations. Less code, more common apis across targets.
Of note is the trick to make F0 look like it has an APB2 bus. It's the
only stm32 that doesn't have a documented APB2 bus, but still has
peripherals enabled via an "APB2" register, and they match how other
targets have an APB2. Simply make APB2 an alias of APB1, as it's only
used for clock speed detection.
Only pulling out the _common_ stuff. This is a single step in a long
process of eliminating all the duplication and "same, but different"
implementations that are stalling adding nice clean easy support for
l0/f7/l4.
This _ignores_ all currently conflict register definitions, even if they
"do the same thing" it just pulls up the common stuff. A subsequent
commit can look at resolving the implementatations to a single version.
It was never complete, even for F1 family code, and went on to be even
less complete for f0 and f3. The usefulness of a library function to
check for both the irq being enabled _and_ the status flag is highly
questionable, and caused known user confusion.
The existing, much simpler, and fully functional usart_get_flag() is
a good replacement in almost all sane use cases.
Fixes https://github.com/libopencm3/libopencm3/issues/734
All the macro arguments that are user supplied, or potentially, wrap properly
in () as good practice.
Probably missed one or two, and a lot of them are possibly unnecessary, but
it's straightforward to just do it always.
Fixes github issue #321
to remove variations, redundancies, add missing, fix errors. All c files
refer only to the dispatch style headers in /include/stm32. Those headers
#include memorymap.h and cm3/common.h. All references to
these are removed from the family specific headers. Ethernet untouched as
it appears incomplete.
Added dummy spi.c for F0/F3. Fix some doxygen anomalies.
