Using RTC in Mesh Application

RE: Using RTC in Mesh Application

Joakim Jakobsen — Fri, 23 Aug 2019 12:15:59 GMT

Hi.

Sorry about the very long delay here.

It seems that you are on the right track here.

Depending on what you are looking for specifically, you can find most of the clock settings in the sdk_config file.

Also, mesh_init() -> .core.lfclksrc = DEV_BOARD_LF_CLK_CFG,

/**
* Clock configuration for Nordic development boards.
*/
#if defined(S110)
#define DEV_BOARD_LF_CLK_CFG NRF_CLOCK_LFCLKSRC_XTAL_20_PPM
#elif NRF_SD_BLE_API_VERSION >= 5
#define DEV_BOARD_LF_CLK_CFG { \
.source = NRF_SDH_CLOCK_LF_SRC, \
.rc_ctiv = NRF_SDH_CLOCK_LF_RC_CTIV, \
.rc_temp_ctiv = NRF_SDH_CLOCK_LF_RC_TEMP_CTIV, \
.accuracy = NRF_SDH_CLOCK_LF_ACCURACY \
}
#else
#define DEV_BOARD_LF_CLK_CFG { \
.source = NRF_CLOCK_LF_SRC_XTAL, \
.rc_ctiv = 0, \
.rc_temp_ctiv = 0, \
.xtal_accuracy = NRF_CLOCK_LF_XTAL_ACCURACY_20_PPM \
}
#endif

[quote user="Heiner"]Unless the Mesh Team strongly recommends it, I would probably try to finish the prototype before migrating to the new SDK version.[/quote]

nRF5 SDK for Mesh v.3.2.0 is a minor feature release. It adds Friend feature support, the RSSI monitoring model, support for nRF5 SDK v15.3.0, significant changes to the DFU documentation, and fixes to several bugs.

You can take a look at the release notes, and see if any of the changes to the SDK is vital for your application. If not, you should be fine using v.3.1.0.

Best regards,
Joakim.

RE: Using RTC in Mesh Application

Heiner — Wed, 21 Aug 2019 19:38:26 GMT

Hi Joakim,

apparently I had to use nrf_drv_rtc_counter_clear and nrf_drv_rtc_cc_set after each compare event.

The compare timer did not trigger again, because it disables itself after the first use (described in this thread).

I'm also using instance #2 of the rtc, because it seems like the other instances are in use.

This might explain, why lfclk_config did not work. Most likely it has already been configured elsewhere in the code.

Anyways I'm still not quite happy, because I don't really understand what's going on and where the clock is configured in this example.

If it's possible, could you maybe point me to where the clock configuration of the mesh example is described?

It would be great to know, so I can calculate the correct compare value instead of just trying.

Also, it might be easier to understand what parameters I can change, without messing up some other part of the code.

[quote userid="20690" url="~/f/nordic-q-a/50397/using-rtc-in-mesh-application/202182"]Note that we just released the latest version on the nRF5 SDK for Mesh (v.3.2.0)[/quote]

I also took a look into the new SDK version, but on a first sight the example does not seem to be build much different than it was in the v.3.1.0 version.

Unless the Mesh Team strongly recommends it, I would probably try to finish the prototype before migrating to the new SDK version.

Best,

Heiner

RE: Using RTC in Mesh Application

Joakim Jakobsen — Fri, 02 Aug 2019 13:46:10 GMT

Thank you!

I'll take a closer look and get back to you.

Note that we just released the latest version on the nRF5 SDK for Mesh (v.3.2.0)

Best regards,
Joakim

RE: Using RTC in Mesh Application

Heiner — Fri, 02 Aug 2019 13:41:34 GMT

Hi Joakim,

I'm currently using Version 3.1.0

Best regards,

Heiner

RE: Using RTC in Mesh Application

Joakim Jakobsen — Fri, 02 Aug 2019 13:30:44 GMT

Hi Heiner.

Just a quick question before starting to look closer into this;

Which version of the nRF5 SDK for Mesh are you working with?

Best regards,
Joakim