How to add timestamp in RTT viewer using NRF log module

RE: How to add timestamp in RTT viewer using NRF log module

FK42 — Tue, 25 Jul 2023 14:50:45 GMT

Adding this in case anyone else runs in the same issue I had when implementing this:

I had the issue that the timestamps wouldn't increment/ increase after a while.

To fix it, I enabled everything related to the RTC1 counter in sdk_config.h. After which I set the RTC_default_config_frequency to a lower value.

I guess it has to do with the counter reaching the maximum value.

RE: How to add timestamp in RTT viewer using NRF log module

Varun — Wed, 04 Jan 2023 10:07:41 GMT

can we trust this timestamp for debugging? curious to know...
thank you

RE: How to add timestamp in RTT viewer using NRF log module

N Ashelman — Thu, 22 Apr 2021 16:37:40 GMT

Note:

You will probably also need to change another line in sdk_config.h (line 3 in this excerpt):

// <o> NRF_LOG_TIMESTAMP_DEFAULT_FREQUENCY - Default frequency of the timestamp (in Hz) or 0 to use app_timer frequency. 
#ifndef NRF_LOG_TIMESTAMP_DEFAULT_FREQUENCY
#define NRF_LOG_TIMESTAMP_DEFAULT_FREQUENCY 0
#endif

The number 0 should be changed to the correct frequency.

For example, my code was using LFCLK with PRESCALER = 1.

Per here, the counter increment frequency is 32768 / (PRESCALER + 1 ), so I set the number to 0x8000 / (1+1) = 0x4000

RE: How to add timestamp in RTT viewer using NRF log module

Srinivas V — Mon, 22 Jun 2020 06:15:51 GMT

Hi Team,

What is the resolution of this time stamp, like [00:00:30.905,548] , like [ Hr:Min:Sec:Msec ].

Regards,

Srinivas.V

RE: How to add timestamp in RTT viewer using NRF log module

kobyfr — Sun, 14 Apr 2019 12:09:05 GMT

terminal time stamp added by windows will not suffice in some cases, since windows threading granularity will not allow a finer resolutio as fine as 1 msec, but rather a resolution only as low as 10-15 msec. This will group several log lines to have the same time-tag, even though they were sent several msec apart.

RE: How to add timestamp in RTT viewer using NRF log module

kobyfr — Sun, 14 Apr 2019 12:06:31 GMT

This will achieve adding time-stamps to NRF logs, in some of the nRF example applications.

1. Add this to main .c

uint32_t get_rtc_counter(void) { return NRF_RTC1->COUNTER; }

2. Change this in main.c
uint32_t err_code = NRF_LOG_INIT();

to this

uint32_t err_code = NRF_LOG_INIT(get_rtc_counter);

3. Change sdk_config.h

from this

#define NRF_LOG_USES_TIMESTAMP 0

to this

#define NRF_LOG_USES_TIMESTAMP 1

The result will be to change logs from this:

<info> app: Setting vector table to bootloader: 0x000F1000
<info> app: Setting vector table to main app: 0x00026000
<info> app: Buttonless DFU Application started.
<info> app: RTC 8211
<info> app: Received indication state 1
<info> app: Received indication state 0

to this:

[00:00:00.000,000] <info> app: Setting vector table to bootloader: 0x000F1000
[00:00:00.000,000] <info> app: Setting vector table to main app: 0x00026000
[00:00:00.440,002] <info> app: Buttonless DFU Application started.
[00:00:00.440,032] <info> app: RTC 14419
[00:00:22.580,566] <info> app: Received indication state 1
[00:00:30.905,548] <info> app: Received indication state 0

RE: How to add timestamp in RTT viewer using NRF log module

Hung Bui — Fri, 21 Jul 2017 11:29:41 GMT

Hi Fordy,

We need to clarify what kind of timestamp you are looking for here.

Note that on the chip, there is no date time minute second etc. The chip doesn't know that. If you want to use timestamp_func, you need count your own time with a 32bit counter.

If you want hour:minute:second in real normal time, then you need to do that on a PC. You record the timestamp when the log arrive. You can use telnet to do that as shown here and here.