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Wakeup from timer interrupt

Question asked by kagan.genady on Jan 24, 2013
Latest reply on Mar 22, 2013 by choi.ick_sung

Hi all

I  am using STM32  and trying to make the  periodic  wake up  of the CPU from low power sleep mode , by interrupt from TIMER 9 , and I see the following strange behavior:

I    succeeded to wake up the CPU from low power sleep mode  by  timer interrupt , only once . After that the CPU remains in sleep mode

 

When I am working without entering to sleep  mode , the timer works ok .

 

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