Battery-backed RAM problem

egartrell · ‎2010-04-23

Posted on April 23, 2010 at 20:31

Tesla DeLorean · ‎2011-05-17

Posted on May 17, 2011 at 10:00

Most of the people coming to the forums have problems, the lack of traffic is probably a good indicator. The STR912 project I worked on has been deployed.

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baranovus · ‎2011-05-17

Posted on May 17, 2011 at 10:00

Hello, clive1.

I tried to make battery backup but also failed. I work in IAR. I declare variable foo __no_init, somewhere in program assign foo = 0x85 and print it out at the beginning of main. It shows foo = 0;

But RTC itself works. At the beginning of hardware initializations I call:

SCU_APBPeriphClockConfig(__RTC,ENABLE); /*enable RTC clock*/

SCU_APBPeriphReset(__RTC,DISABLE); /*RTC out of RESET state*/

and after that:

RTC_DeInit();

RTC_SRAMBattPowerCmd(ENABLE);

Could you give a hint, what I'm missing?

Thanks.

egartrell · ‎2011-05-17

Posted on May 17, 2011 at 10:00

So, my rep is exaggerating...nobody is using this?