ADC Clock

[Shikamaru]

Hi,

On my bl653_dvk board, I am running the ADC example. It functions properly. I have a few questions about this:

1. How to determine which clock is being used by the ADC peripheral in this situation.

2. Every 20 samples, the rms value must be calculated. Do we have a method that will directly calculate the rms value.

kindly suggest.

[Vidar Berg]

Hi,

1. The SAADC runs of the internal HF oscillator unless you explicitly request you request the HF crystal oscillator through mpsl_clock_hfclk_request().

2. sqrt() and pow() are available in math.h

Best regards,

Vidar

[Shikamaru]

Thanks Vidar Berg ,

 Am using nRF toolchain version 1.9.1 , in that toolchain I didn't find these function. can you suggest on which toolchain these function's are available. However in zephyr repo am able to find sqrt() function. unfortunately I didn't find pow().

Note: am using nRF connect app and  VSCode with nRF Extensions to build my project. 

regards,

Shikamaru.

[Vidar Berg]

They are available in newlib (https://developer.nordicsemi.com/nRF_Connect_SDK/doc/2.0.0/zephyr/kernel/libc/index.html#c-standard-library) so please make sure you have CONFIG_NEWLIB_LIBC enabled.

Regards,

Vidar