/**
* @brief This function handles AlarmB Polling request.
* @param hrtc: pointer to a RTC_HandleTypeDef structure that contains
* the configuration information for RTC.
* @param Timeout: Timeout duration
* @retval HAL status
*/
HAL_StatusTypeDef HAL_RTCEx_PollForAlarmBEvent(RTC_HandleTypeDef *hrtc, uint32_t Timeout)
{
uint32_t tickstart = 0U;
/* Get tick */
tickstart = HAL_GetTick();
while(__HAL_RTC_ALARM_GET_FLAG(hrtc, RTC_FLAG_ALRBF) == RESET)
{
if(Timeout != HAL_MAX_DELAY)
{
if((Timeout == 0U)||((HAL_GetTick() - tickstart ) > Timeout))
{
hrtc->State = HAL_RTC_STATE_TIMEOUT;
return HAL_TIMEOUT;
}
}
}
/* Clear the Alarm Flag */
__HAL_RTC_ALARM_CLEAR_FLAG(hrtc, RTC_FLAG_ALRBF);
/* Change RTC state */
hrtc->State = HAL_RTC_STATE_READY;
return HAL_OK;
}
/*!
* @brief RTC IRQ Handler on the RTC Alarm
* @param none
* @retval none
*/
void HW_RTC_IrqHandler ( void )
{
RTC_HandleTypeDef* hrtc=&RtcHandle;
/* enable low power at irq*/
LowPower_Enable( e_LOW_POWER_RTC );
/* Get the AlarmA interrupt source enable status */
if(__HAL_RTC_ALARM_GET_IT_SOURCE(hrtc, RTC_IT_ALRA) != RESET)
{
/* Get the pending status of the AlarmA Interrupt */
if(__HAL_RTC_ALARM_GET_FLAG(hrtc, RTC_FLAG_ALRAF) != RESET)
{
/* Clear the AlarmA interrupt pending bit */
__HAL_RTC_ALARM_CLEAR_FLAG(hrtc, RTC_FLAG_ALRAF);
/* Clear the EXTI's line Flag for RTC Alarm */
__HAL_RTC_ALARM_EXTI_CLEAR_FLAG();
/* AlarmA callback */
HAL_RTC_AlarmAEventCallback(hrtc);
}
}
}
/**
* @brief This function configures the RTC_ALARMA as a time base source.
* The time source is configured to have 1ms time base with a dedicated
* Tick interrupt priority.
* @note This function is called automatically at the beginning of program after
* reset by HAL_Init() or at any time when clock is configured, by HAL_RCC_ClockConfig().
* @param TickPriority: Tick interrupt priority.
* @retval HAL status
*/
HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority)
{
__IO uint32_t counter = 0U;
RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_PeriphCLKInitTypeDef PeriphClkInitStruct;
#ifdef RTC_CLOCK_SOURCE_LSE
/* Configue LSE as RTC clock soucre */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
RCC_OscInitStruct.LSEState = RCC_LSE_ON;
PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSE;
#elif defined (RTC_CLOCK_SOURCE_LSI)
/* Configue LSI as RTC clock soucre */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
RCC_OscInitStruct.LSIState = RCC_LSI_ON;
PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSI;
#elif defined (RTC_CLOCK_SOURCE_HSE)
/* Configue HSE as RTC clock soucre */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_HSE_DIV32;
#else
#error Please select the RTC Clock source
#endif /* RTC_CLOCK_SOURCE_LSE */
if(HAL_RCC_OscConfig(&RCC_OscInitStruct) == HAL_OK)
{
PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC;
if(HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) == HAL_OK)
{
/* Enable RTC Clock */
__HAL_RCC_RTC_ENABLE();
__HAL_RCC_RTCAPB_CLK_ENABLE();
/* The time base should be 1ms
Time base = ((RTC_ASYNCH_PREDIV + 1) * (RTC_SYNCH_PREDIV + 1)) / RTC_CLOCK
HSE as RTC clock
Time base = ((49 + 1) * (4 + 1)) / 250kHz
= 1ms
LSE as RTC clock
Time base = ((31 + 1) * (0 + 1)) / 32.768KHz
= ~1ms
LSI as RTC clock
Time base = ((31 + 1) * (0 + 1)) / 32KHz
= 1ms
*/
hRTC_Handle.Instance = RTC;
hRTC_Handle.Init.HourFormat = RTC_HOURFORMAT_24;
hRTC_Handle.Init.AsynchPrediv = RTC_ASYNCH_PREDIV;
hRTC_Handle.Init.SynchPrediv = RTC_SYNCH_PREDIV;
hRTC_Handle.Init.OutPut = RTC_OUTPUT_DISABLE;
hRTC_Handle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
hRTC_Handle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
if (HAL_RTC_Init(&hRTC_Handle) != HAL_OK)
{
return HAL_ERROR;
}
/* Disable the write protection for RTC registers */
__HAL_RTC_WRITEPROTECTION_DISABLE(&hRTC_Handle);
/* Disable the Alarm A interrupt */
__HAL_RTC_ALARMA_DISABLE(&hRTC_Handle);
/* Clear flag alarm A */
__HAL_RTC_ALARM_CLEAR_FLAG(&hRTC_Handle, RTC_FLAG_ALRAF);
counter = 0U;
/* Wait till RTC ALRAWF flag is set and if Time out is reached exit */
while(__HAL_RTC_ALARM_GET_FLAG(&hRTC_Handle, RTC_FLAG_ALRAWF) == 0U)
{
if(counter++ == (SystemCoreClock / 56U)) /* Timeout = ~ 1s */
{
return HAL_ERROR;
}
}
hRTC_Handle.Instance->ALRMAR = (uint32_t)0x01U;
/* Configure the Alarm state: Enable Alarm */
__HAL_RTC_ALARMA_ENABLE(&hRTC_Handle);
/* Configure the Alarm interrupt */
__HAL_RTC_ALARM_ENABLE_IT(&hRTC_Handle, RTC_IT_ALRA);
/* RTC Alarm Interrupt Configuration: EXTI configuration */
__HAL_RTC_ALARM_EXTI_ENABLE_IT();
/* Check if the Initialization mode is set */
if((hRTC_Handle.Instance->ICSR & RTC_ICSR_INITF) == (uint32_t)RESET)
{
/* Set the Initialization mode */
hRTC_Handle.Instance->ICSR = (uint32_t)RTC_INIT_MASK;
counter = 0U;
while((hRTC_Handle.Instance->ICSR & RTC_ICSR_INITF) == (uint32_t)RESET)
{
if(counter++ == (SystemCoreClock / 56U)) /* Timeout = ~ 1s */
{
return HAL_ERROR;
}
}
}
hRTC_Handle.Instance->DR = 0U;
hRTC_Handle.Instance->TR = 0U;
hRTC_Handle.Instance->ICSR &= (uint32_t)~RTC_ICSR_INIT;
/* Enable the write protection for RTC registers */
__HAL_RTC_WRITEPROTECTION_ENABLE(&hRTC_Handle);
HAL_NVIC_SetPriority(RTC_TAMP_IRQn, TickPriority, 0U);
HAL_NVIC_EnableIRQ(RTC_TAMP_IRQn);
return HAL_OK;
}
}
return HAL_ERROR;
}
