RE: Embedding GPIOTE module in TWI example

Marjeris Romero — Mon, 03 Dec 2018 09:48:02 GMT

Happy to help, let me know if you run into any other issues 🙂

RE: Embedding GPIOTE module in TWI example

Sascha Schmidt — Fri, 30 Nov 2018 14:34:02 GMT

Thank you very much, that clears a lot for me!!

Kind regards

Sascha

RE: Embedding GPIOTE module in TWI example

Marjeris Romero — Fri, 30 Nov 2018 11:33:03 GMT

Hi Sascha,

I understand it can be a bit confusing. The app_gpiote.h is from the GPIOTE handling library, which uses the GPIOTE driver. But as you can see in the documentation page this library is obsolete and should not be used in new designs. The advice is to use the drivers directly.

About the drivers now, we have just migrated from our old drivers (nrf_drv) to the new drivers (nrfx). We still have a legacy layer which serves as a wrapper for the new nrfx drivers, see GPIO driver - legacy layer. Please read more about the migration to the nrfx drivers here.

As a warning you should know that the legacy layer will not be supported in future SDK releases. But in SDK v15.2.0 we still recommend using the legacy layer wrapper, see the documentation for the GPIO driver here, but you can easily use the nrfx driver directly without going through the legacy layer by taking a look at the forwardings to the new implementation here.

The legacy layer driver is located in:

integration\nrfx\legacy\nrf_drv_gpiote.h

And the nrfx driver is located in:

modules\nrfx\drivers\include\nrfx_gpiote.h

Second question:

Use the GPIOTE driver instead of the library. In sdk_config.h you need to enable both the nrf_dvr_gpiote driver and the nrfx_gpiote regardless of what you choose to use. Do not set the old GPIOTE_ENABLED entry to 0, see the note in the migration guide.

I hope this provide some clarity. It is a bit confusing because of the migration. I think maybe the easiest way would be to use the legacy layer and follow the steps in the documentation. Try to build the GPIOTE example from the SDK and you can see how the legacy driver is wrapping the nrfx driver. The example is located in examples/peripherals/gpiote

Best Regards,

Marjeris