How to set Backup Mode?

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tonykwon100
Posts: 1
Joined: Thu Jun 18, 2015 10:27 am

How to set Backup Mode?

Fri Jun 26, 2015 10:15 am

Hello?

I have installed backup battery on SAMA5D3 Xplained board.
I'm using the linux system built from the linux4sam.

The RTC is working well but, there is something problem.

After charging 3 hours, I have cut the power for 2 hours.
And, the RTC is reset to initial state. So, I need to set the RTC again.

I think the Backup Mode for RTC is not working correctly.
How can I make it work in backup mode while powering off.

The commands that I used for setting RTC are following,

# date -s '2015-06-26 17:07:30'
# hwclock -w

Thank you.

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