Review HSE clock initialization to match with latest CUBE firmware.
Also there is no need to set the full clock tree again after deep sleep exit.
With this change we get a stable deep sleep mode (when allowed by CORDIO stack).
There is no need to add FIRST attribute to MAPPING_TABLE as the default
ordering is alphabetical order.
With this change, we don't have any warning with MBED2 and the sections
are properly ordered anyway in BLE cases.
In case of mbed2, BLE feature is not built.
As there is a MAPPING_TABLE in BLE feature which is not compiled in case
of mbed2, the linker reported the below error
[ERROR] "C:/Data/Workspace/mbed/BUILD/test/NUCLEO_WB55RG/ARM/MBED_2/
.link_script.sct", line 65 (column 6): Error: L6236E:
No section matches selector - no section to be FIRST/LAST.
Solution is to check whether BLE is enabled.
These files are not BLE specific, but also needed for some clock setting
for instance.
In order to compile an MBED2 application, we need to move the files.
- move hw_conf.h file to targets/TARGET_STM/TARGET_STM32WB directory as
this is used also out of BLE feature.
- create a dedicated hal_deepsleep function as the behavior in WB is a lot
different from other existing STM32 targets
- update clock tree configuration to directly clock the entire tree @ 32MHz
out of HSE. This is needed as we want to let the M0 core running without
any change on M0-side of clocks when M4 enters /exits deep sleep.
Laurent Meunier
jeromecoutant
bcostm