Standby mode

[jspika]

Posted on April 10, 2013 at 17:12

Hello.

Does anyone has any idea how can i get the source of wake up from standby mode? I use only RTC and wake up pin. I found a WUF bit in PWR_CSR, but problem is that this bit is for both events. Thanks for any idea

[Tesla DeLorean]

Posted on April 10, 2013 at 17:17

Doesn't the RTC signal the alarm condition? Can you observed the state of the GPIO pin?

If the external event is transient perhaps you need to latch it, and clear it.

[jspika]

Posted on April 10, 2013 at 20:34

I tryed to catch the RTC_FLAG_OW and RTC_FLAG_ALR.. In data sheet are these figures:

So i think flags should be still on after wake up,shouldnt they? In my code i use this:if (RTC_GetFlagStatus(RTC_FLAG_ALR))     LCD_DisplayStringLine(Line7, ''RTC_FLAG_ALR on''); if (RTC_GetFlagStatus(RTC_FLAG_OW ))     LCD_DisplayStringLine(Line8, ''RTC_FLAG_OW on''); But it always shows that flags are set on 0.

[Tesla DeLorean]

Posted on April 10, 2013 at 22:12

  if (PWR_GetFlagStatus(PWR_FLAG_WU))

      puts(''PWR_FLAG_WU'');   if (PWR_GetFlagStatus(PWR_FLAG_SB))       puts(''PWR_FLAG_SB'');     if (RTC_GetITStatus(RTC_IT_ALRB))         puts(''RTC_IT_ALRB'');     if (RTC_GetITStatus(RTC_IT_ALRA))         puts(''RTC_IT_ALRA''); 00:14:00 Standby Option ....ENTERS STANDBY, Alarm set for 2 minutes hence ....EXITS PWR_FLAG_WU PWR_FLAG_SB RTC_IT_ALRA RTC from STANDBY.... 00:16:00

[jspika]

Posted on April 15, 2013 at 00:23

Just for ppl who will work with this problem : there are two ideas how go.

1. check RTC counter ( after RTC alarm it should be somewhere on the start) 2. check status on WKUP GPIO. Butt isnt fast as uController,so there will be still information that butt is pressed I tryed only 2. - and all worked ok,.