HAL RTC SetDate Bug or some another way to do??

Forum|Forum|9 years ago
February 23, 2017
2 replies
2432 views

Posted on February 23, 2017 at 10:49

I am using STM32F103 in my new application. I have used STM32Cube to generate my code including Internal RTC. My

problem is that the time is ok saved when reseted but date is always reset. when i inspected the code i found that the HAL_RTC_SetDate() function is not setting the RTC_CNTH and RTC_CNTL registers appropriately. Is it a bug or is there any other way of doing this. when we add day shouldn't the RTC_CNTH and RTC_CNTL added with (24hrs x 60 Mins x 60 Secs) this is not happening.

#cube-mx #hal-library

lhofstaetter9

Associate II

Posted on June 02, 2017 at 09:30

For me its the same. I use RTC_SetDate and RTC_SetTime to set the date and the time. After that I use RTC_GetDate and RTC_GetTime to read the date and the time. The time works, but the date is still the same. If I do then a system reset by pressing the reset button, the date can be read properly. So writing date and time seems to work. But reading does not work.

Tuttle.Darrell

Associate II

Posted on June 02, 2017 at 13:33

I don't know if this is related or not:

I had an issue a few years ago with the STM32F407 (using SPL). After changing the date, RTC_GetDate was not returning the correct date for sometimes upwards of 100 attempts (my test was to read and display the time and date every second). I never resolved the cause, but I came up with a rework; if I first called RTC_GetTime BEFORE calling RTC_GetDate, all was well. RTC_WaitForSynchro did not correct the problem.

samuel23

Associate III

Posted on June 06, 2017 at 14:48

I had the same problem (on STM32L152)... and I found this subject last week...

I tried to invert the call to have

RTC_GetDate() AFTER

RTC_GetTime()... and I got good results. As a feeling, I guess it solved the problem......... h

oping it is not a coincidence!

O

OleksiiUA

Visitor II

I myself spent the whole day to figure it out. Implemented the clock using third-party functions. And only in the evening while analyzing code HAL_RTC_GetTime() did it come to me. The function counts only one day days_elapsed in a circle and counts days. ->>

/* Update date */

RTC_DateUpdate(hrtc, days_elapsed);

They need to be stored in another memory, for example, in backup registers.