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CMSIS and GPIO

Hello,

I am looking at the CMSIS-Driver page at https://arm-software.github.io/CMSIS_5/Driver/html/index.html.

I see peripherals. I do not see GPIO. Is GPIO covered outside CMSIS-Driver? 

Are there functions that under CMSIS that could set direction and logic level of IO pins? Are there standard naming conventions for the pin numbers?

Thanks!