rtc interrupt service routine not woring

[vitthal muddapur]

Posted on February 10, 2018 at 09:59

hi,

ALRAF bit is set in ISR register but doesn,t execute the rtc-irq handler.

i enabled NVIC_RTC.

[straubm]

Posted on February 10, 2018 at 12:22

What's the configuration? MCU? CubeMX and/or LL-drivers in use ?

[vitthal muddapur]

Posted on February 12, 2018 at 07:53

MCU CONFIGURATION

[Jack Peacock]

Posted on February 10, 2018 at 15:05

Did you also enable the EXTI line for RTC alarm?

[vitthal muddapur]

Posted on February 12, 2018 at 08:29

no

[Tesla DeLorean]

Posted on February 10, 2018 at 16:10

Chronically vague, provide context.

Show code, show detail

[vitthal muddapur]

Posted on February 12, 2018 at 08:07

void RTC_ALRMAR_SET()

{

RTC->WPR = 0xCA;

RTC->WPR = 0x53;

RTC->CR &=~ RTC_CR_ALRAE;

while((RTC->ISR & RTC_ISR_ALRAWF) != RTC_ISR_ALRAWF)

{

}

RTC->ALRMAR = RTC_ALRMAR_MSK4 | RTC_ALRMAR_MSK3 | RTC_ALRMAR_MSK2 | 1<<30(Week day selection mask) | 1<<4(set Second tens in BCD format.);

RTC->CR = RTC_CR_ALRAIE | RTC_CR_ALRAE;

RTC->WPR = 0xFE;

RTC->WPR = 0x64;

}

trying to get interrupt at 10 sec but not working 

[henry.dick]

Posted on February 10, 2018 at 18:38

The bug is obvious: you just need to set the 3rd bit 38th line down on the 2nd page of your 8th function about 2/3 logic high. As now, it is not high enough.

[T J]

Posted on February 12, 2018 at 08:43

Which IDE are you using ?

can you check the registers with single step ?

You could read the Reference manual to find all the register descriptions.

your problem would be in there, as a guess.

[vitthal muddapur]

Posted on February 12, 2018 at 08:54

KEIL 5

set alarm interrupt flag in isr doesn't go to the isr routine 

please help me 

[vitthal muddapur]

Posted on February 12, 2018 at 08:55

code is 

void RTC_ALRMAR_SET()

{

RTC->WPR = 0xCA;

RTC->WPR = 0x53;

RTC->CR &=~ RTC_CR_ALRAE;

while((RTC->ISR & RTC_ISR_ALRAWF) != RTC_ISR_ALRAWF)

{

}

RTC->ALRMAR = RTC_ALRMAR_MSK4 | RTC_ALRMAR_MSK3 | RTC_ALRMAR_MSK2 | 1<<30(Week day selection mask) | 1<<4(set

Second tens in BCD format.);

RTC->CR = RTC_CR_ALRAIE | RTC_CR_ALRAE;

RTC->WPR = 0xFE;

RTC->WPR = 0x64;

}

[straubm]

Posted on February 12, 2018 at 10:15

In STM32L0x3 - according to the reference manual - RTC interrupts are routed to EXTI line 17. Did you enable this line?

EDIT: reference manual pg. 659 ff and pg. 285 ff.

[vitthal muddapur]

Posted on February 12, 2018 at 10:35

Thank you 

i have not set EXTI Line 17.

after set it's working right now 

thank you very much

[straubm]

Posted on February 12, 2018 at 10:58

Welcome. But then Jack Peacock mentioned the EXTI line issue on Feb 10th, asking you, whether you had enabled it. You simply answered 'no' and obviously did not look into it. Maybe there is something to learn from this .......