[SOLVED]Unwanted RTC reset at reboot

[barthess]

I have no good ideas. This is not a BKP reset because reset value of RTCSEL is 0x0. As RM0090 says:

Once the RTC clock source has been selected, it cannot be changed anymore unless the Backup domain is reset.

Probably some supply/clock glitches?

[Laurent]

After some intensive debugging I found it was a problem on my side... I'm really sorry. Everything works fine now.

[Tectu]

May you tell us what the problem was and how you fixed it? This is very essential for people coming across a similar problem in the future.


~ Tectu

[Laurent]

I forgot that my firmware was not run directly upon startup, it is launched by a custom bootloader. It's been there for so long that I completely forgot about it. And the one who wrote the bootloader (which uses ChibiOS too) configured the RTC to use the LSI clock.

That was really stupid

[Tectu]

Don't worry, we all do, and there's nobody excluded, make "stupid" mistakes. That's actually making things even still for experts interesting.
Glad to her that you got it working now, enjoy the hacking!


~ Tectu

[barthess]

Hi Laurent,
1) Please mark this topic as [SOLVED].
2) Tectu is correct. We spent our time trying to solve problem and we interested a lot in solution. Even there is not Chibios problem we want to know where problem may come from. Do not be lazy (or confused) to explain where problem exactly was.

[Laurent]

1) Please mark this topic as [SOLVED].

How?

[Tectu]

Go to your first post, click the 'edit' button and then edit the Subject.

And just a small example: I spend 10 and a half hour one saturday, ending up in a stupid problem... I wrote some new board files. I took an existing one as a template since it's only slightly different. Everything worked great, I copied it, edited it and included the new board.mk correctly. However, As I found out after what painful amount of time, I didn't edit the board.mk content. Therefore, I did include the correct Makefile, but the paths in that Makefile still referred to the old board.


~ Tectu

[Laurent]

Sorry to look like such a noob, but I can't seem to be able to edit my first post. I can only edit the last one.

And I noticed that no other thread on this forum (at least in the few sections I looked) is marked "[SOLVED]". Strange.