Posted on August 05, 2016 at 05:04Dear all,
I am using stm32L151VD.
I got an application which needs to change the RTC wakeup counter reload value in run time. My original wake up period is 1/16s. And then I use the code below to change the wake up period to 10s.
/* Allow access to RTC */
PWR_RTCAccessCmd(ENABLE);
RTC_WakeUpCmd(DISABLE);
RTC_WakeUpClockConfig(RTC_WakeUpClock_RTCCLK_Div16);
RTC_SetWakeUpCounter(0x5000 - 1); /* wake-up at 10s*/
RTC_ClearFlag(RTC_FLAG_WUTF);
EXTI_ClearITPendingBit(EXTI_Line20);
/* Enable Wakeup Counter */
RTC_WakeUpCmd(ENABLE);
/* Disallow access to RTC */
PWR_RTCAccessCmd(DISABLE);
Although the wakeup time changed eventually, but it will trigger one interrupt (old 1/16s interrupt )before the 10s reload value apply. Any idea how to eliminate that unwanted interrupt?
#stm32-rtc
