Enhance GPIO usage using LL

[fpistm]

Using LL instead of HAL will increase GPIO access.

[hasenbanck]

Just an idea: In the Marlin STM32 HAL we used the register access to speed up the GPIO operations:
https://github.com/MarlinFirmware/Marlin/blob/bugfix-2.0.x/Marlin/src/HAL/HAL_STM32/fastio_STM32.h
https://github.com/MarlinFirmware/Marlin/blob/bugfix-2.0.x/Marlin/src/HAL/HAL_STM32/fastio_STM32.cpp

For that we had to populate a pin mapping. Maybe the enhancement of the GPIO functionality could make this easier by providing such a mapping?

[ktand]

The link to the 2nd fille doesn't work. Should be: https://github.com/MarlinFirmware/Marlin/blob/bugfix-2.0.x/Marlin/src/HAL/HAL_STM32/fastio_STM32.cpp

…

On Fri, Nov 2, 2018 at 8:27 AM Nils Hasenbanck ***@***.***> wrote: Just an idea: In the Marlin STM32 HAL we used the register access to speed up the GPIO operations: https://github.com/MarlinFirmware/Marlin/blob/bugfix-2.0.x/Marlin/src/HAL/HAL_STM32/fastio_STM32.h https://github.com/MarlinFirmware/Marlin/blob/bugfix-2.0.x/Marlin/src/HAL/HAL_STM32/fastio_STM32.c For that we had to populate a pin mapping. Maybe the enhancement of the GPIO functionality could make this easier by providing such a mapping? — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#274 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AQ8NJITjUGHzdTZR1L1UU07rmumqOapPks5uq_PTgaJpZM4U8ntA> .

[hasenbanck]

Upps, yeah. Corrected. Was just programming C stuff and brain got a blackout.

[fpistm]

I've made a first try about this issue, see #368
@hasenbanck , @ktand thanks for sharing.
I guess the get_GPIO_Port enhancement will allow you to avoid use FastIO_init