Tracking Current Time in NRF9160

RE: Tracking Current Time in NRF9160

Hakon — Fri, 24 Sep 2021 14:45:22 GMT

[quote user="Rajender"]1. how can i update cc[0] with latest compare value to get event for next second without event handler[/quote]

You can use this register to clear it.

[quote user="Rajender"]2. how can i increment a variable by mapping with DPPI after a NRFX_RTC_INT_COMPARE0 event(here i want to increment my seconds variable)[/quote]

You can use timer counter mode.

Also, have you considered using the Zephyr timer library to keep track of time? It seems like an easier solution than yours.

RE: Tracking Current Time in NRF9160

Rajender — Wed, 22 Sep 2021 05:56:47 GMT

We want to track the current time with the help of a variable "seconds", so we need to update seconds variable for every second by using DPPI after NRFX_RTC_INT_COMPARE0 event without event handler.

Best regards

Rajender

RE: Tracking Current Time in NRF9160

Hakon — Tue, 21 Sep 2021 13:46:29 GMT

[quote user=""]I want to track the Current time in IST format and i need to generate an event to DPPI on particular time (ex: every day10am)[/quote]

What task will you connect the DPPI event to?
What is it for ? Toggling a LED, or something else?

RE: Tracking Current Time in NRF9160

Rajender — Tue, 21 Sep 2021 06:39:58 GMT

Hi hakon,

any update for me?

1. how can i update cc[0] with latest compare value to get event for next second without event handler

NOTE: How can i config NRFX_RTC_INT_COMPARE0 event to repeat itself after cc[0] register value, i have seen this in nrf_calendar.h, in which compare event triggering it self repeatedly.

https://github.com/NordicPlayground/nrf5-calendar-example/blob/master/nrf_calendar.c

2. how can i increment a variable by mapping with DPPI after a NRFX_RTC_INT_COMPARE0 event(here i want to increment my seconds variable)

Best Regards

Rajender

RE: Tracking Current Time in NRF9160

Rajender — Fri, 17 Sep 2021 11:03:18 GMT

Hi,

finally now i can toggle my led with RTC event NRFX_RTC_INT_TICK ,

But i want to add NRFX_RTC_INT_COMPARE0 event to DPPI, here my problem to add NRFX_RTC_INT_COMPARE0 event is, i need to reload compare register value every time to generate the event for next 1 sec. so how can i do that without event handler (i dont want to use any event handler for RTC, becoz i dont want to disturb CPU for every single second)

is it possible to call a function uisng dppi after event triggered?

for your reference i am attaching my working project for rtc+dppi+gpio

devzone.nordicsemi.com/.../working_5F00_timer_5F00_test_5F00_nrfx.zip

Best Regards

Rajender

RE: Tracking Current Time in NRF9160

Hakon — Thu, 16 Sep 2021 12:58:14 GMT

Hello,

have you looked at this code? It shows how DPPI can be configured properly. One thing that you are missing is allocating the DPPI channel with nrfx_dppi_channel_alloc().

RE: Tracking Current Time in NRF9160

Rajender — Wed, 15 Sep 2021 12:37:53 GMT

Hi,

i have successfully implemented DPPI with GPIOTE, (for button press dppi will toggle led), and i have implemented RTC with NRFX_RTC_INT_TICK, NRFX_RTC_INT_COMPARE0 events, so my final goal is to combine these two and toggling LED when the NRFX_RTC_INT_COMPARE0 event occurs,

so please help me this, im attaching my DPPI, RTC and RTC+DPPI please let me know where i have been making mistake

devzone.nordicsemi.com/.../working_2D00_blinky_2D00_ppi.zip

devzone.nordicsemi.com/.../nrfx_5F00_rtc_5F00_working.zip

devzone.nordicsemi.com/.../timer_5F00_test_5F00_nrfx.zip

Note: This timer_test_nrfx.zip is the final RTC+DPPI project

Best Regards

Rajender.