[GitHub] [nuttx] acassis commented on issue #9679: stm32 GPIO driver

["acassis (via GitHub)" <gi...@apache.org>]

acassis commented on issue #9679:
URL: https://github.com/apache/nuttx/issues/9679#issuecomment-1619071411

   Hi @tobiasjaster
   
   I don't see the boards/arm/stm32l4/nucleo-l496zg/src/stm32_gpio.c file to support user GPIO on this board, so it needs to be added first.
   
   About your question why not use CMSIS or STM-HAL, there is an old thread here about it: https://nuttx.yahoogroups.narkive.com/QxSBuUvM/cmsis
   
   In theory it is possible to use some vendor HAL (new Espressif RISC-V chips are done this way), but I think for historic reasons Mr. Greg always developed the MCU support from scratch.
   
   You could think this work is very painful (and in fact it is), but that bring a level of similarities among all ARCHes supported by NuttX. Also it forces you to learn more about the MCU low level, so you will really know almost everything about it.


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