Rather than Unlocking flash during flash object creation, and leaving
the flash possibly continuously unlocked a(s object might bever be freed),
we decide to Unlock then Lock again at each erase or program call.
Users of FlashIAP usually get the minimum programable size
by calling flash.get_page_size(), so let's return the minimum
to allows a most efficient usage of flash.
For F4 devices, this is 1 byte.
For L0 and L1 devices, this is a word (4 bytes).
For L4 devices, this is a double word (8 bytes).
First add the flash_data.h that describe the flash memory topology,
and also activate FLASH support for the corresponding targets.
This is a 1,5MB flash memory device which contains 15 sectors, where
sectors 12 to 15 are 128KB sectors. So flash_api.c needed has been
updated to differentiate between this flash memory and the 2MB ones
by checking existence of sector 16 instead of sector 12.
Use ADDR_FLASH_SECTOR_12 as this is defined by target (the flash size varies, for
instance for some F437xx is up to 2MB (2nd bank might not be there)).
Laurent MEUNIER
Martin Kojtal
adustm