RTC0 in BLE activity

[Elia_pell]

Dear all,

I'm developing my thesis project and I'm using 2 custom nrf52840-DK. I manage to implement BLE and the 2 boards actually connect and communicate beetween them. I'm using sdk 17.00 and s140 softdevice. I read the s140 documentation and I know that the softdevice use both timer0 and rtc0:which of them is used to scheduled the connection interval and to "tell" the radio to switch on every connection interval? The timer or the rct? I would like to syncronize the trasmission of data with the start of the connection interval, but if I used the wrong peripheral I could have problem of clock drift.

Thanks everybody,

Elia

[Turbo J]

Elia_pell said:

which of them is used to scheduled the connection interval

The connection interval timing is done via RTC.

This allows the high frequency clock (HFINT/HFCLK) to be turned off completely in between radio events - unless it is in use by other peripherials or the MCU core.

[Elia_pell]

So, if I would like to sync my trasmission of data with connection interval, will I have to set up another rtc (rtc1/rtc2) at the start of the connection and set up a compare channel equal to my connection interval?