How do I use registers to configure SAADC for my Arduino Nano 33?

[uljadberdica]

The documentation is a little unclear. I am using Arduino Nano 33 BLE. Using the analogread() functions of Arduino I get a much worse performance than the nRF is supposed to handle. How can I use the registers with the void setup() and void loop() to leverage the full performance of SAADC? 

I am using Arduino on PlatformIO IDE on VSCode. 

This is the closest think I have found: https://github.com/andenore/NordicSnippets/blob/master/examples/saadc/main.c 

But it is not working as I am too inexperienced to figure out the GPIO. 

[Nguyen Hoan Hoang]

you may try this https://github.com/IOsonata/IOsonata/blob/master/ARM/Nordic/nRF52/src/adc_nrf52_saadc.cpp

usage example https://github.com/IOsonata/IOsonata/blob/master/ARM/Nordic/exemples/ADCDemo.cpp

[uljadberdica]

Thank you but I do not know how to make it work with Arduino yet. Any suggestions?

[Nguyen Hoan Hoang]

Sorry, I don't use Arduino nor PlatformIO and I don't think Arduino is recommended for BLE firmware development.  You can take the required files and try to add it to your VS code and compile.  Or you can also follow the blog posts here to work with that code

https://embeddedsoftdev.blogspot.com/p/ehal-nrf51.html

https://embeddedsoftdev.blogspot.com/2017/12/bluetooth-le-with-nordic-nrf51-nrf52.html