How to set the date and time to the file on SD card or Flash disk on nRF52840

[Michael Jang]

Hi

I'm trying to file open and write for logging temperature data and others on nRF52840.

I successfully open, read and write on SD card or flash in nRF52840.

I also have used  nrf_cal_set_time(year, month-1, day, hour, minute, second) in nrf_calendar.c successfully.

It's a great and file to display date and time.

But, after file creation using f_open(), f_write() and f_close(), I found that the default date&time of the file is always 01/01/2016.

I appreciate that if you let us know what is wrong from my side and how to change or set the date & time of file property.

Thanks

Minsoo Jang

[Simonr]

Hi

I assume you have used the nrf5-calendar-example as reference for the nrf_cal_set_time() function? The nRF52840 will need to get the date/time from somewhere, and if you don't provide it, it seems like it falls back to the default 01/01/2016. In the default example, the application will wait for you to set the time over UART by entering the year, month, day, hour, minute and second in a terminal.

Can you also provide some information on what SDK version you're using?

Best regards,

Simon

[Michael Jang]

Hi

Thank you very much for your reply and sorry for my late response.

I'm developing program on SDK 12.0.2 and already has been used nrf5-calendar-example.

As I said, nrf_cal_set_time(year, month, day, hour, minute, second) and print_current_time() are no problem when it runs on program. My programs run and display like following successfully:

NPC5,190,03/26/21 - 19:37:18,25.91 C ,59.62 %,1002,4.4V

NPC5,191,03/26/21 - 19:37:19,25.88 C ,58.39 %,1019,4.4V

...

However, although I created new file(temper.csv) and write on the that file after nrf_cal_set_time and nrf_cal_get_time usage on program, the file's date is always  01/01/2016 when I see that file via USB port like following:

test_temper.jpg (652×36)

TEMPER.CSV 2016-01-01 AM 12:00 17KB

I'm sure you must have simple solution for this matter.

Thanks in advance

Michael Jang

[Michael Jang]

My SDK version is 17.0.2.