RTC peripheral and system clock

[GuyYaniv]

Hi,

Is there any relationship between RTC peripheral and the system clock (which from DTC it looks like attached to rtc0)?

I'm trying to use PPI to generate a radio task based on system clock compare (i.e. send packet at day:mont:year:hour:minute:second:msec:usec type of event)

The RTC in the peripheral section is too short to contain long enough time span between overflow and I can't find in the documentation a way to invoke PPI from system clock.

Is that possible at all?

Thanks,

Guy.

[Jared]

Hi,

By system clock, do you mean the Kernel timer? That will use the same clock source as RTC peripheral.

I'm trying to use PPI to generate a radio task based on system clock compare (i.e. send packet at day:mont:year:hour:minute:second:msec:usec type of event)

You mean a RTC Compare event?

PPI can only be used for HW events and tasks.

What time duration are you trying to set to drive the Radio task through PPI?

regards

Jared

[GuyYaniv]

What I mean is can I create a compare event to the system time (kernel time)

So if I set the time using rtc_set_time() and then create a PPI event for a compare in the future.

I'm basically trying to have 2 NRF devices synchronize time of day over radio.

Thanks,

Guy

[Jared]

Hi,

What task are you planning to link the COMPARE event with? Are you thinking of something similar as what is done in this blogpost?

regards

Jared