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339 lines
8.1 KiB
339 lines
8.1 KiB
/** |
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****************************************************************************** |
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* @file stm32f10x_rtc.c |
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* @author MCD Application Team |
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* @version V3.5.0 |
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* @date 11-March-2011 |
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* @brief This file provides all the RTC firmware functions. |
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****************************************************************************** |
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* @attention |
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* |
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* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS |
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* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE |
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* TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY |
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* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING |
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* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE |
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* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. |
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* |
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* <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2> |
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****************************************************************************** |
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*/ |
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/* Includes ------------------------------------------------------------------*/ |
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#include "stm32f10x_rtc.h" |
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/** @addtogroup STM32F10x_StdPeriph_Driver |
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* @{ |
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*/ |
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/** @defgroup RTC |
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* @brief RTC driver modules |
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* @{ |
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*/ |
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/** @defgroup RTC_Private_TypesDefinitions |
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* @{ |
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*/ |
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/** |
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* @} |
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*/ |
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/** @defgroup RTC_Private_Defines |
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* @{ |
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*/ |
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#define RTC_LSB_MASK ((uint32_t)0x0000FFFF) /*!< RTC LSB Mask */ |
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#define PRLH_MSB_MASK ((uint32_t)0x000F0000) /*!< RTC Prescaler MSB Mask */ |
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/** |
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* @} |
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*/ |
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/** @defgroup RTC_Private_Macros |
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* @{ |
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*/ |
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/** |
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* @} |
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*/ |
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/** @defgroup RTC_Private_Variables |
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* @{ |
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*/ |
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/** |
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* @} |
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*/ |
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/** @defgroup RTC_Private_FunctionPrototypes |
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* @{ |
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*/ |
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/** |
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* @} |
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*/ |
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/** @defgroup RTC_Private_Functions |
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* @{ |
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*/ |
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/** |
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* @brief Enables or disables the specified RTC interrupts. |
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* @param RTC_IT: specifies the RTC interrupts sources to be enabled or disabled. |
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* This parameter can be any combination of the following values: |
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* @arg RTC_IT_OW: Overflow interrupt |
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* @arg RTC_IT_ALR: Alarm interrupt |
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* @arg RTC_IT_SEC: Second interrupt |
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* @param NewState: new state of the specified RTC interrupts. |
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* This parameter can be: ENABLE or DISABLE. |
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* @retval None |
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*/ |
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void RTC_ITConfig(uint16_t RTC_IT, FunctionalState NewState) |
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{ |
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/* Check the parameters */ |
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assert_param(IS_RTC_IT(RTC_IT)); |
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assert_param(IS_FUNCTIONAL_STATE(NewState)); |
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if (NewState != DISABLE) |
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{ |
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RTC->CRH |= RTC_IT; |
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} |
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else |
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{ |
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RTC->CRH &= (uint16_t)~RTC_IT; |
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} |
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} |
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/** |
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* @brief Enters the RTC configuration mode. |
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* @param None |
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* @retval None |
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*/ |
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void RTC_EnterConfigMode(void) |
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{ |
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/* Set the CNF flag to enter in the Configuration Mode */ |
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RTC->CRL |= RTC_CRL_CNF; |
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} |
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/** |
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* @brief Exits from the RTC configuration mode. |
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* @param None |
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* @retval None |
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*/ |
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void RTC_ExitConfigMode(void) |
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{ |
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/* Reset the CNF flag to exit from the Configuration Mode */ |
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RTC->CRL &= (uint16_t)~((uint16_t)RTC_CRL_CNF); |
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} |
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/** |
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* @brief Gets the RTC counter value. |
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* @param None |
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* @retval RTC counter value. |
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*/ |
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uint32_t RTC_GetCounter(void) |
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{ |
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uint16_t tmp = 0; |
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tmp = RTC->CNTL; |
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return (((uint32_t)RTC->CNTH << 16 ) | tmp) ; |
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} |
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/** |
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* @brief Sets the RTC counter value. |
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* @param CounterValue: RTC counter new value. |
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* @retval None |
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*/ |
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void RTC_SetCounter(uint32_t CounterValue) |
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{ |
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RTC_EnterConfigMode(); |
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/* Set RTC COUNTER MSB word */ |
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RTC->CNTH = CounterValue >> 16; |
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/* Set RTC COUNTER LSB word */ |
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RTC->CNTL = (CounterValue & RTC_LSB_MASK); |
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RTC_ExitConfigMode(); |
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} |
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/** |
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* @brief Sets the RTC prescaler value. |
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* @param PrescalerValue: RTC prescaler new value. |
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* @retval None |
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*/ |
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void RTC_SetPrescaler(uint32_t PrescalerValue) |
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{ |
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/* Check the parameters */ |
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assert_param(IS_RTC_PRESCALER(PrescalerValue)); |
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RTC_EnterConfigMode(); |
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/* Set RTC PRESCALER MSB word */ |
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RTC->PRLH = (PrescalerValue & PRLH_MSB_MASK) >> 16; |
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/* Set RTC PRESCALER LSB word */ |
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RTC->PRLL = (PrescalerValue & RTC_LSB_MASK); |
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RTC_ExitConfigMode(); |
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} |
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/** |
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* @brief Sets the RTC alarm value. |
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* @param AlarmValue: RTC alarm new value. |
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* @retval None |
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*/ |
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void RTC_SetAlarm(uint32_t AlarmValue) |
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{ |
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RTC_EnterConfigMode(); |
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/* Set the ALARM MSB word */ |
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RTC->ALRH = AlarmValue >> 16; |
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/* Set the ALARM LSB word */ |
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RTC->ALRL = (AlarmValue & RTC_LSB_MASK); |
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RTC_ExitConfigMode(); |
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} |
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/** |
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* @brief Gets the RTC divider value. |
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* @param None |
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* @retval RTC Divider value. |
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*/ |
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uint32_t RTC_GetDivider(void) |
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{ |
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uint32_t tmp = 0x00; |
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tmp = ((uint32_t)RTC->DIVH & (uint32_t)0x000F) << 16; |
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tmp |= RTC->DIVL; |
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return tmp; |
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} |
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/** |
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* @brief Waits until last write operation on RTC registers has finished. |
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* @note This function must be called before any write to RTC registers. |
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* @param None |
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* @retval None |
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*/ |
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void RTC_WaitForLastTask(void) |
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{ |
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/* Loop until RTOFF flag is set */ |
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while ((RTC->CRL & RTC_FLAG_RTOFF) == (uint16_t)RESET) |
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{ |
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} |
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} |
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/** |
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* @brief Waits until the RTC registers (RTC_CNT, RTC_ALR and RTC_PRL) |
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* are synchronized with RTC APB clock. |
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* @note This function must be called before any read operation after an APB reset |
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* or an APB clock stop. |
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* @param None |
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* @retval None |
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*/ |
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void RTC_WaitForSynchro(void) |
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{ |
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/* Clear RSF flag */ |
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RTC->CRL &= (uint16_t)~RTC_FLAG_RSF; |
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/* Loop until RSF flag is set */ |
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while ((RTC->CRL & RTC_FLAG_RSF) == (uint16_t)RESET) |
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{ |
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} |
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} |
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/** |
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* @brief Checks whether the specified RTC flag is set or not. |
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* @param RTC_FLAG: specifies the flag to check. |
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* This parameter can be one the following values: |
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* @arg RTC_FLAG_RTOFF: RTC Operation OFF flag |
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* @arg RTC_FLAG_RSF: Registers Synchronized flag |
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* @arg RTC_FLAG_OW: Overflow flag |
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* @arg RTC_FLAG_ALR: Alarm flag |
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* @arg RTC_FLAG_SEC: Second flag |
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* @retval The new state of RTC_FLAG (SET or RESET). |
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*/ |
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FlagStatus RTC_GetFlagStatus(uint16_t RTC_FLAG) |
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{ |
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FlagStatus bitstatus = RESET; |
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/* Check the parameters */ |
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assert_param(IS_RTC_GET_FLAG(RTC_FLAG)); |
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if ((RTC->CRL & RTC_FLAG) != (uint16_t)RESET) |
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{ |
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bitstatus = SET; |
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} |
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else |
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{ |
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bitstatus = RESET; |
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} |
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return bitstatus; |
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} |
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/** |
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* @brief Clears the RTC's pending flags. |
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* @param RTC_FLAG: specifies the flag to clear. |
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* This parameter can be any combination of the following values: |
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* @arg RTC_FLAG_RSF: Registers Synchronized flag. This flag is cleared only after |
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* an APB reset or an APB Clock stop. |
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* @arg RTC_FLAG_OW: Overflow flag |
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* @arg RTC_FLAG_ALR: Alarm flag |
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* @arg RTC_FLAG_SEC: Second flag |
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* @retval None |
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*/ |
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void RTC_ClearFlag(uint16_t RTC_FLAG) |
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{ |
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/* Check the parameters */ |
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assert_param(IS_RTC_CLEAR_FLAG(RTC_FLAG)); |
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/* Clear the corresponding RTC flag */ |
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RTC->CRL &= (uint16_t)~RTC_FLAG; |
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} |
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/** |
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* @brief Checks whether the specified RTC interrupt has occurred or not. |
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* @param RTC_IT: specifies the RTC interrupts sources to check. |
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* This parameter can be one of the following values: |
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* @arg RTC_IT_OW: Overflow interrupt |
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* @arg RTC_IT_ALR: Alarm interrupt |
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* @arg RTC_IT_SEC: Second interrupt |
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* @retval The new state of the RTC_IT (SET or RESET). |
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*/ |
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ITStatus RTC_GetITStatus(uint16_t RTC_IT) |
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{ |
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ITStatus bitstatus = RESET; |
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/* Check the parameters */ |
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assert_param(IS_RTC_GET_IT(RTC_IT)); |
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bitstatus = (ITStatus)(RTC->CRL & RTC_IT); |
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if (((RTC->CRH & RTC_IT) != (uint16_t)RESET) && (bitstatus != (uint16_t)RESET)) |
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{ |
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bitstatus = SET; |
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} |
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else |
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{ |
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bitstatus = RESET; |
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} |
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return bitstatus; |
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} |
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/** |
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* @brief Clears the RTC's interrupt pending bits. |
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* @param RTC_IT: specifies the interrupt pending bit to clear. |
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* This parameter can be any combination of the following values: |
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* @arg RTC_IT_OW: Overflow interrupt |
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* @arg RTC_IT_ALR: Alarm interrupt |
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* @arg RTC_IT_SEC: Second interrupt |
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* @retval None |
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*/ |
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void RTC_ClearITPendingBit(uint16_t RTC_IT) |
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{ |
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/* Check the parameters */ |
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assert_param(IS_RTC_IT(RTC_IT)); |
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/* Clear the corresponding RTC pending bit */ |
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RTC->CRL &= (uint16_t)~RTC_IT; |
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} |
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/** |
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* @} |
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*/ |
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/** |
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* @} |
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*/ |
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/** |
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* @} |
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*/ |
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/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/
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