pc13번 언급이 있어서 확인해보니 RTC_OUT / RTC_TAMPER로 설정이 가능하다.

Tamper를 활성화 하면 RTC_OUT 에서 RTC Output on the Tamper pin이 사용 불가능해진다.

Tamper는 인터럽트가 있는걸 봐서는.. 일종의 input 으로 설정되나보다.

rtc_Tamper를 rtc out으로 쓰지 않으면, 기본으로 tamper는 disble 되는 듯
stm32f1xx_hal_rtc.c
| *** Tamper configuration *** ============================ [..] (+) Enable the RTC Tamper and configure the Tamper Level using the HAL_RTCEx_SetTamper() function. You can configure RTC Tamper with interrupt mode using HAL_RTCEx_SetTamper_IT() function. (+) The TAMPER1 alternate function can be mapped to PC13 /** * @brief Initializes the RTC peripheral * @param hrtc pointer to a RTC_HandleTypeDef structure that contains * the configuration information for RTC. * @retval HAL status */ HAL_StatusTypeDef HAL_RTC_Init(RTC_HandleTypeDef *hrtc) { /* Set Initialization mode */ if (RTC_EnterInitMode(hrtc) != HAL_OK) { /* Set RTC state */ hrtc->State = HAL_RTC_STATE_ERROR; return HAL_ERROR; } else { /* Clear Flags Bits */ CLEAR_BIT(hrtc->Instance->CRL, (RTC_FLAG_OW | RTC_FLAG_ALRAF | RTC_FLAG_SEC)); if (hrtc->Init.OutPut != RTC_OUTPUTSOURCE_NONE) { /* Disable the selected Tamper pin */ CLEAR_BIT(BKP->CR, BKP_CR_TPE); } /* Set the signal which will be routed to RTC Tamper pin*/ MODIFY_REG(BKP->RTCCR, (BKP_RTCCR_CCO | BKP_RTCCR_ASOE | BKP_RTCCR_ASOS), hrtc->Init.OutPut); } } |
stm32f1xx_hal_rtc.h
| /** @defgroup RTC_output_source_to_output_on_the_Tamper_pin Output source to output on the Tamper pin * @{ */ #define RTC_OUTPUTSOURCE_NONE 0x00000000U /*!< No output on the TAMPER pin */ #define RTC_OUTPUTSOURCE_CALIBCLOCK BKP_RTCCR_CCO /*!< RTC clock with a frequency divided by 64 on the TAMPER pin */ #define RTC_OUTPUTSOURCE_ALARM BKP_RTCCR_ASOE /*!< Alarm pulse signal on the TAMPER pin */ #define RTC_OUTPUTSOURCE_SECOND (BKP_RTCCR_ASOS | BKP_RTCCR_ASOE) /*!< Second pulse signal on the TAMPER pin */ |
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