Where to get "nrfx_rtc_t const *p_instance" for nrfx_rtc_init()

[Jones_swDev]

I could not find a way, where I can get the nrfx_rtc_t const *p_instance for the nrfx_rtc_init function. There is no example where it is shown where to get this struct from.

[Jørgen Holmefjord]

Hi,

The nrfx_rtc_t must be defined in your application. This is normally done like this:

#define RTC_INSTANCE_NUMBER 0

const nrfx_rtc_t rtc = NRFX_RTC_INSTANCE(RTC_INSTANCE_NUMBER);

Where RTC_INSTANCE_NUMBER represents the RTC instance you want to use (in this case RTC0).

You can then pass this instance to nrfx_rtc_init() like this:

nrfx_rtc_init(&rtc, .., ..);

This is shown in the RTC peripheral example in nRF5 SDK (with nrf_drv_rtc APIs, but this is a simple replacement to nrfx).

Best regards,
Jørgen

[Jones_swDev]

Thanks for your reply.
I think it will work, but the compiler tells me it is missing NRFX_RTC0_INST_IDX. I think, i have to activate the rtc0 in a config file. Can you tell me where?

Best regards
Jones