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Stm32 spi : use LL API to improve performances #4375
This PR contains a change in SPI driver to improve performances by accessing to registers directly (using LL layer in STM32 SDK, which provides inline functions to access it.
This SDK updates will include the LL API that is used here.
I will rebase when this is done - but this PR can be used for test by anyone interested in it, and review can happen in parallel.
CI tests passed ok
Also MBED OS2 SPI tests verified OK.
Could you investigate please
referenced this pull request
Jun 1, 2017
LGTM, just that macro is not clear to me what it does and how to find documentation (changes HAL implementation).