Posted on May 24, 2015 at 20:48I've startup a board using STM32F072 ( new with ST :) ) ,but cannot get the RTC wake up timer to work, i can see the RTC Registers are moving using LSE 32K crystal in debug mode, thus RTC->DR increase every second.
i want:
to use the 1 second interrupt to activate some flags and to awake from STOP mode
this is the startup code generated with Cube.
RTC_TimeTypeDef sTime;
RTC_DateTypeDef sDate;
/**Initialize RTC and set the Time and Date
*/
hrtc.Instance = RTC;
hrtc.Init.HourFormat = RTC_HOURFORMAT_24;
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);
sTime.Hours = 0;
sTime.Minutes = 0;
sTime.Seconds = 0;
sTime.SubSeconds = 0;
sTime.TimeFormat = RTC_HOURFORMAT12_AM;
sTime.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
sTime.StoreOperation = RTC_STOREOPERATION_RESET;
HAL_RTC_SetTime(&hrtc, &sTime, FORMAT_BIN);
sDate.WeekDay = RTC_WEEKDAY_MONDAY;
sDate.Month = RTC_MONTH_JANUARY;
sDate.Date = 1;
sDate.Year = 0;
HAL_RTC_SetDate(&hrtc, &sDate, FORMAT_BIN);
/**Enable the WakeUp
*/
HAL_RTCEx_SetWakeUpTimer_IT(&hrtc, 16, RTC_WAKEUPCLOCK_RTCCLK_DIV16);
// NVIC_SetPriority(RTC_IRQn, 0);
// NVIC_EnableIRQ(RTC_IRQn); // - with or without this the result is the same the interrupt never enters.
// -------------------------- this is the interrupt, that never enters ----------------------
void RTC_IRQHandler(void){
RTC->ISR &=~ RTC_ISR_WUTF;
TFlags1S.Val=0xFFFF;
}
