Example code for evaluating I2C RTC in Laird DVK BL654 ?

[Hannu Hirvonen]

Hello,

I have to evaluate I2C functionality of BL654 module. There seems to be RTC chip in Laird DVK BL654 board. Is there somebody how has investigating how does it work in practice ? I try to run twi_scanner project but it doesn't find a RTC chip ? I put jumpers J17 and J21. What else I have to do ? 

-Hannu-

[Kenneth]

Hi,

I think this question is best directed to Laird yes. I assume there may be a low frequency clock (32kHz) in the design, this is typically used by an internal RTC in the nRF52840 to maintain synchronization and timing, can it be that are referring to?

Best regards,
Kenneth

[awneil]

Hannu Hirvonen said:

There seems to be RTC chip in Laird DVK BL654 board

Looking at that again, perhaps Hannu Hirvonen is referring to an RTC Chip on the DVK board - not within the BL654 module?

But, in that case, surely the DVK documentation would answer the question ?

[Hannu Hirvonen]

Hello and thanks,

I really mean that RTC Chip on the DVK board. I solved my case and like to thank you :)

[awneil]

For the benefit of others who may come along with a similar question, could you explain how you solved it?

And please verify the answer: