WIP: stm32l4: add initial dfsdm support #1536
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This is my attempt to add support for DFSDM for the l4. (Maybe this can also be used for other variants that have a DFSDM, but I did not really check). I am currently using this on my STM32L476RG nucleo board together with a TI AMC1306.
This is a WIP PR, so by no means consider this as complete!! It is still missing a lot of stuff, but the basics are working already.
I tend to add stuff to open source projects and they never reach it upstream because it is incomplete or I stop working on it. So this time at least I try to push what I already have, maybe it can be useful for someone or maybe we can work together on finishing it. I will also add an example PR to the examples repository.