Hi everyone!
I'm using STM32L475 and I have a problem, the RTC Wake Up doesn't interrupt.
I've set up the RTC in order to interrupt as follows (interrupt every 31.25 ms):
static void MX_RTC_Init(void)
{
/* USER CODE BEGIN RTC_Init 0 */
/* USER CODE END RTC_Init 0 */
RTC_TimeTypeDef sTime = {0};
RTC_DateTypeDef sDate = {0};
/* USER CODE BEGIN RTC_Init 1 */
/* USER CODE END RTC_Init 1 */
/** Initialize RTC Only
*/
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.OutPutRemap = RTC_OUTPUT_REMAP_NONE;
hrtc.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
hrtc.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
if (HAL_RTC_Init(&hrtc) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN Check_RTC_BKUP */
/* USER CODE END Check_RTC_BKUP */
/** Initialize RTC and set the Time and Date
*/
sTime.Hours = 0x0;
sTime.Minutes = 0x0;
sTime.Seconds = 0x0;
sTime.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
sTime.StoreOperation = RTC_STOREOPERATION_RESET;
if (HAL_RTC_SetTime(&hrtc, &sTime, RTC_FORMAT_BCD) != HAL_OK)
{
Error_Handler();
}
sDate.WeekDay = RTC_WEEKDAY_MONDAY;
sDate.Month = RTC_MONTH_JANUARY;
sDate.Date = 0x1;
sDate.Year = 0x0;
if (HAL_RTC_SetDate(&hrtc, &sDate, RTC_FORMAT_BCD) != HAL_OK)
{
Error_Handler();
}
/** Enable the WakeUp
*/
if (HAL_RTCEx_SetWakeUpTimer_IT(&hrtc, 511, RTC_WAKEUPCLOCK_RTCCLK_DIV2) != HAL_OK)
{
Error_Handler();
}
I'm using the LSE clock and it's working fine (the LSEON bit in RCC_BDCR register is "on").
The global interrupts are active:
/* RTC_WKUP_IRQn interrupt configuration */
HAL_NVIC_SetPriority(RTC_WKUP_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(RTC_WKUP_IRQn);
Also the registers CR_WUTIC and CR_WUTIE (wake up timer interruption enable) are correctly ON.
However, it's never entering here (I'm checking in debug mode):
void RTC_WKUP_IRQHandler(void)
{
/* USER CODE BEGIN RTC_WKUP_IRQn 0 */
/* USER CODE END RTC_WKUP_IRQn 0 */
HAL_RTCEx_WakeUpTimerIRQHandler(&hrtc);
/* USER CODE BEGIN RTC_WKUP_IRQn 1 */
/* USER CODE END RTC_WKUP_IRQn 1 */
}
What could be the issue? Why RTC Wake Up doesn't interrupt?
For more information, on the other side, the Systick interuption is working fine.
Thank you in advance
