STM32L053 RTC PERIODIC WAKEUP ENABLE BIT RESETS AFTER FIRST INTERRUPT

[unnati811]

Posted on June 07, 2017 at 14:23

Hi,

I am using STML053C8 controller.

In my application i am using RTC periodic wakeup interrupt for waking up every 1 sec.But the interrupt occurs only for the first time and then the wakeup enable bit & wakeup interrupt enable bit gets reset. also the auto reload counter gets set to 0x0000ffff. i have initialised the rtc as follows:

void RTC_Init_1sec()

{

    //Initialize RTC Only

  hrtc.Instance = RTC;

  hrtc.Init.AsynchPrediv = 127;

  hrtc.Init.SynchPrediv = 255;

  hrtc.Init.OutPut = RTC_OUTPUT_DISABLE;

  hrtc.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;

  hrtc.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;

  HAL_RTC_Init(&hrtc);

  //Enable the WakeUp

  HAL_RTCEx_SetWakeUpTimer_IT(&hrtc, 2048, RTC_WAKEUPCLOCK_RTCCLK_DIV16); for 1 sec

 

  HAL_NVIC_SetPriority(RTC_IRQn,3,0);

  HAL_NVIC_EnableIRQ(RTC_IRQn);

}

To add, i have been successful with RTC periodic wakeup interrupt using the above RTC initialization for my another application using STML052K8.

awaiting for the suggestions.

thanks

unnati