nRF52840 DK - Unable able to use SAADC, Timer0 and APP USB CDC ACM together?

[AaronDerb13]

Hi,

I currently have a project which triggers a series of SAADC readings from the Timer0 interrupt handler. This part of my program works as expected, however, to add more functionality I've looked to integrate the USB CDC ACM example as a means of transporting data to a UI.

I have removed the logger and cli components from the build as I'm not intending on logging via these means in my application; I have compiled and downloaded the modified program and it works as expected. Now what becomes interesting is when I bring the project across it fails to detect a USB power event? 

Now I have experienced some quirks whilst using the atomic library which I believe was down to disabling and re-enabling the interrupts, could I be seeing a similar problem here? Or is there some sort of shared resource I'm unaware of? 

Any help would be greatly appreciated!

[natersoz]

As for Timer0 that is a hardware peripheral reserved for use by the softdevice.

See https://infocenter.nordicsemi.com/index.jsp?topic=%2Fstruct_nrf52%2Fstruct%2Fs132.html&cp=3_4_1

I'm not certain if you are using the softdevice, but if you are, then use a different timer.

[AaronDerb13]

Thank you, I was aware that this timer was used by the softdevice. Not an issue at the minute as I'm just using USB CDC as transport. 

Thanks,

Aaron