Reset RTC time and date showing some strange behaviour

RE: Reset RTC time and date showing some strange behaviour

Alan Ajit — Tue, 07 Aug 2018 05:45:42 GMT

Thank you sigurd for your support hope its work fine not test fully. I will update status soon

anyway thanks

RE: Reset RTC time and date showing some strange behaviour

Sigurd — Mon, 06 Aug 2018 07:44:42 GMT

If you are setting a completely new and different time, e.g. adjust the new time with several days or years, it seems like the calibration will not work as intended.

Try to remove the calibration offset, and see if that solves your issue. The nrf_cal_set_time() function will then look like this:

void nrf_cal_set_time(uint32_t year, uint32_t month, uint32_t day, uint32_t hour, uint32_t minute, uint32_t second)
{
    static time_t uncal_difftime, difftime, newtime;
    time_struct.tm_year = year - 1900;
    time_struct.tm_mon = month;
    time_struct.tm_mday = day;
    time_struct.tm_hour = hour;
    time_struct.tm_min = minute;
    time_struct.tm_sec = second;   
    newtime = mktime(&time_struct);
    CAL_RTC->TASKS_CLEAR = 1;  
    
	/* Commented out
	
    // Calculate the calibration offset 
    if(m_last_calibrate_time != 0)
    {
        difftime = newtime - m_last_calibrate_time;
        uncal_difftime = m_time - m_last_calibrate_time;
        m_calibrate_factor = (float)difftime / (float)uncal_difftime;
    }
	
	*/
    
    // Assign the new time to the local time variables
    m_time = m_last_calibrate_time = newtime;
}

RE: Reset RTC time and date showing some strange behaviour

Alan Ajit — Sat, 04 Aug 2018 05:24:35 GMT

Thank you sigurd for your reply RTC in RTC2 its work fine first time but when i reset the time and date its its not working

my cofiguration

#define CAL_RTC NRF_ RTC2
#define CAL_RTC_IRQn RTC2_IRQn
#define CAL_RTC_IRQHandler RTC2_IRQHandler

procedure:

RTC Init and set with time

BLe Init

every thing works fine(get time and date properly and BLE works fine)

when i start to reset the time and date using nrf_cal_set_time() its show strange behavior(time changing continuously) . i don't know what happen to RTC when i try to reset time again.

observation:-

i can set time once if i try to reset the time RTC fails

can you help me to solve this issue?

RE: Reset RTC time and date showing some strange behaviour

Sigurd — Fri, 03 Aug 2018 13:40:03 GMT

Hi,

Since you are using this with BLE/SoftDevice, please make sure that the calendar uses RTC2. I.e. you need to change these defines here.(Change to NRF_RTC2,RTC2_IRQn and RTC2_IRQHandler instead ) (SoftDevice uses RTC0, and app_timer uses RTC1).