rtc calendar application, urgent

[lakshmikantha85]

Posted on February 11, 2011 at 17:04

rtc calendar application, urgent

[Chris1]

Posted on May 17, 2011 at 14:24 Assuming your system starts up with the right oscillators and peripheral clocks enabled; to write to the backup registers the following should be sufficient:  PWR_BackupAccessCmd(ENABLE);            // allow access to Backup Registers  BKP_WriteBackupRegister(BKP_DR2, 0x0005); // write value 5 to BKP_DR2 [PWR_BackupAccessCmd(ENABLE); is probably equivalent to PWR->CR |= PWR_CR_DBP;]. -Chris

[Tesla DeLorean]

Posted on May 17, 2011 at 14:24

I am storing date in backup registers. BKP2,3,4

Or use a 32-bit time scale like UNIX time. And you wouldn't have to watch for the RTC wrapping every 24 hours.