nrf52832 rtc to timestamp

[Maud]

Hello,

I am using nRF52832 chip for freeRTOS project and using RTC2. I have SDK15.2. I want to have timestamp from RTC as hex format. I searched almost all forums but i have nothing.  I just found https://github.com/NordicPlayground/nrf5-calendar-example this example but i want to uptade automatically and don't want to update via bluetooth. Could you recommend me some examples or forum? 

Thanks

[Simonr]

Then how do you want to interface with the RTC setting the timestamp? I assume you'd like to see the timestamp in a terminal or another display of some kind? Please provide some details on what you'd like to achieve. You could always modify the nrf5 calendar example by removing the UART functions in order to reduce it to just using the RTC to do the timestamps, but that would mean that you won't be able to see the timestamps anywhere.

Best regards,

Simon

[Maud]

I am reading accelerometer sensor datas and trying to find max 5 value in 10 secs. I have to know when i get this 5 max values so i want to put timestamp info after values.

Best regards

[Simonr]

I still think you should look at the calendar example to see how the RTC is initialized and how the timestamp function(s) are implemented, and then implement that into your project with this accelerometer sensor data.

Please be more specific with what you're having trouble with.

Best regards,

Simon

[Maud]

ı implemented the calendar example to my project but i have an error when header file is like this :

#define CAL_RTC NRF_RTC2
#define CAL_RTC_IRQn RTC2_IRQn
#define CAL_RTC_IRQHandler RTC2_IRQHandler
#define CAL_RTC_IRQ_Priority 3

Error is Output/.../....o: in function `RTC2_IRQHandler':multiple definition of `RTC2_IRQHandler';

...\nRF5_SDK_15.2.0_9412b96\modules\nrfx\drivers\src/nrfx_rtc.c:343: first defined here

Then i change the header file, code just stop :

#define CAL_RTC NRF_RTC0
#define CAL_RTC_IRQn RTC0_IRQn
#define CAL_RTC_IRQHandler RTC0_IRQHandler
#define CAL_RTC_IRQ_Priority 3

Here is my implementation :

void NrfInit(void)
{
/* Select the 32 kHz crystal and start the 32 kHz clock */
NRF_CLOCK->LFCLKSRC = CLOCK_LFCLKSRC_SRC_Xtal << CLOCK_LFCLKSRC_SRC_Pos;
NRF_CLOCK->EVENTS_LFCLKSTARTED = 0;
NRF_CLOCK->TASKS_LFCLKSTART = 1;
//while(NRF_CLOCK->EVENTS_LFCLKSTARTED == 0);

/* Configure the RTC for 1 minute wakeup (default) */
CAL_RTC->PRESCALER = 0xFFF;
CAL_RTC->EVTENSET = RTC_EVTENSET_COMPARE0_Msk;
CAL_RTC->INTENSET = RTC_INTENSET_COMPARE0_Msk;
CAL_RTC->CC[0] = m_rtc_increment * 8;
CAL_RTC->TASKS_START = 1;
NVIC_SetPriority(CAL_RTC_IRQn, CAL_RTC_IRQ_Priority);
NVIC_EnableIRQ(CAL_RTC_IRQn);
}

void nrf_cal_set_callback(void (*callback)(void), uint32_t interval)
{
/* Set the calendar callback, and set the callback interval in seconds */
cal_event_callback = callback;
m_rtc_increment = interval;
m_time += CAL_RTC->COUNTER / 8;
CAL_RTC->TASKS_CLEAR = 1;
CAL_RTC->CC[0] = interval * 8;
}

void CAL_RTC_IRQHandler(void)
{
if(CAL_RTC->EVENTS_COMPARE[0])
{
CAL_RTC->EVENTS_COMPARE[0] = 0;

CAL_RTC->TASKS_CLEAR = 1;

m_time += m_rtc_increment;
if(cal_event_callback) cal_event_callback();
}
}

Best regards

[Maud]

Edit : NRF_DRV_RTC_INSTANCE(2)