Posted on June 24, 2018 at 05:40The tamper level detection configuration shown below
void init_BspTamper()
{
RTC_TamperTypeDef stamperstructure;
RtcHandle.Instance = RTC;
RtcHandle.Init.HourFormat = RTC_HOURFORMAT_24;
RtcHandle.Init.AsynchPrediv = RTC_ASYNCH_PREDIV;
RtcHandle.Init.SynchPrediv = RTC_SYNCH_PREDIV;
RtcHandle.Init.OutPut = RTC_OUTPUT_DISABLE;
RtcHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
RtcHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
if (HAL_RTC_Init(&RtcHandle) != HAL_OK)
{
/* Initialization Error */
//Error_Handler();
}
//Configure RTC Tamper
stamperstructure.Tamper = RTC_TAMPER_1;
stamperstructure.Trigger = RTC_TAMPERTRIGGER_LOWLEVEL;
stamperstructure.Filter = RTC_TAMPERFILTER_2SAMPLE;//å®šä¹‰é‡‡æ ·æ¬¡æ•°
stamperstructure.SamplingFrequency = RTC_TAMPERSAMPLINGFREQ_RTCCLK_DIV256;
stamperstructure.PrechargeDuration = RTC_TAMPERPRECHARGEDURATION_1RTCCLK;1RTCCLK=30us
stamperstructure.TamperPullUp = RTC_TAMPER_PULLUP_ENABLE;
stamperstructure.TimeStampOnTamperDetection = RTC_TIMESTAMPONTAMPERDETECTION_DISABLE;
stamperstructure.NoErase = RTC_TAMPER_ERASE_BACKUP_ENABLE;
stamperstructure.MaskFlag = RTC_TAMPERMASK_FLAG_DISABLE;
stamperstructure.Interrupt = RTC_TAMPER1_INTERRUPT;
//HAL_StatusTypeDef HAL_RTCEx_SetTamper_IT(RTC_HandleTypeDef *hrtc, RTC_TamperTypeDef* sTamper)
//
// if (HAL_RTCEx_SetTamper_IT(&RtcHandle, &stamperstructure) != HAL_OK)
// {
// /* Initialization Error */
// //Error_Handler();
// }
}
see from the code in HAL_RTCEx_SetTamper_IT(RTC_HandleTypeDef *hrtc, RTC_TamperTypeDef* sTamper) function,it seems that the level detetion can't use the tamper interrupt , because in the function it enabled the exti rising edge(__HAL_RTC_TAMPER_TIMESTAMP_EXTI_ENABLE_RISING_EDGE();).
so ,if tamper level detection doesn't use the interrupt, how to get the event occured information.
should i use tamper event polling function (HAL_RTCEx_PollForTamper1Event) to check if the tamper has occured. but i don't know if i use the polling function ,do i need to configure the EXTI?
