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How to use GPIO interface IPs of ARM Cortex M0+

Hello,

We bought ARM CM0+ deliverables from ARM. I want to design an SoC which has to get data from an another system .The aim of the SoC is to process an array of 4096 samples received from the external world.For the data interfacing, we are using GPIO interface IPs provided by ARM as part of deliverables.

Can anyone explain how the GPIO works in CM0+ and how to program in C?

Thanks,

Sabarish