/** | |
****************************************************************************** | |
* @file stm32f10x_rtc.c | |
* @author MCD Application Team | |
* @version V3.4.0 | |
* @date 10/15/2010 | |
* @brief This file provides all the RTC firmware functions. | |
****************************************************************************** | |
* @copy | |
* | |
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS | |
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE | |
* TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY | |
* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING | |
* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE | |
* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. | |
* | |
* <h2><center>© COPYRIGHT 2010 STMicroelectronics</center></h2> | |
*/ | |
/* Includes ------------------------------------------------------------------*/ | |
#include "stm32f10x_rtc.h" | |
/** @addtogroup STM32F10x_StdPeriph_Driver | |
* @{ | |
*/ | |
/** @defgroup RTC | |
* @brief RTC driver modules | |
* @{ | |
*/ | |
/** @defgroup RTC_Private_TypesDefinitions | |
* @{ | |
*/ | |
/** | |
* @} | |
*/ | |
/** @defgroup RTC_Private_Defines | |
* @{ | |
*/ | |
#define RTC_LSB_MASK ((uint32_t)0x0000FFFF) /*!< RTC LSB Mask */ | |
#define PRLH_MSB_MASK ((uint32_t)0x000F0000) /*!< RTC Prescaler MSB Mask */ | |
/** | |
* @} | |
*/ | |
/** @defgroup RTC_Private_Macros | |
* @{ | |
*/ | |
/** | |
* @} | |
*/ | |
/** @defgroup RTC_Private_Variables | |
* @{ | |
*/ | |
/** | |
* @} | |
*/ | |
/** @defgroup RTC_Private_FunctionPrototypes | |
* @{ | |
*/ | |
/** | |
* @} | |
*/ | |
/** @defgroup RTC_Private_Functions | |
* @{ | |
*/ | |
/** | |
* @brief Enables or disables the specified RTC interrupts. | |
* @param RTC_IT: specifies the RTC interrupts sources to be enabled or disabled. | |
* This parameter can be any combination of the following values: | |
* @arg RTC_IT_OW: Overflow interrupt | |
* @arg RTC_IT_ALR: Alarm interrupt | |
* @arg RTC_IT_SEC: Second interrupt | |
* @param NewState: new state of the specified RTC interrupts. | |
* This parameter can be: ENABLE or DISABLE. | |
* @retval None | |
*/ | |
void RTC_ITConfig(uint16_t RTC_IT, FunctionalState NewState) | |
{ | |
/* Check the parameters */ | |
assert_param(IS_RTC_IT(RTC_IT)); | |
assert_param(IS_FUNCTIONAL_STATE(NewState)); | |
if (NewState != DISABLE) | |
{ | |
RTC->CRH |= RTC_IT; | |
} | |
else | |
{ | |
RTC->CRH &= (uint16_t)~RTC_IT; | |
} | |
} | |
/** | |
* @brief Enters the RTC configuration mode. | |
* @param None | |
* @retval None | |
*/ | |
void RTC_EnterConfigMode(void) | |
{ | |
/* Set the CNF flag to enter in the Configuration Mode */ | |
RTC->CRL |= RTC_CRL_CNF; | |
} | |
/** | |
* @brief Exits from the RTC configuration mode. | |
* @param None | |
* @retval None | |
*/ | |
void RTC_ExitConfigMode(void) | |
{ | |
/* Reset the CNF flag to exit from the Configuration Mode */ | |
RTC->CRL &= (uint16_t)~((uint16_t)RTC_CRL_CNF); | |
} | |
/** | |
* @brief Gets the RTC counter value. | |
* @param None | |
* @retval RTC counter value. | |
*/ | |
uint32_t RTC_GetCounter(void) | |
{ | |
uint16_t tmp = 0; | |
tmp = RTC->CNTL; | |
return (((uint32_t)RTC->CNTH << 16 ) | tmp) ; | |
} | |
/** | |
* @brief Sets the RTC counter value. | |
* @param CounterValue: RTC counter new value. | |
* @retval None | |
*/ | |
void RTC_SetCounter(uint32_t CounterValue) | |
{ | |
RTC_EnterConfigMode(); | |
/* Set RTC COUNTER MSB word */ | |
RTC->CNTH = CounterValue >> 16; | |
/* Set RTC COUNTER LSB word */ | |
RTC->CNTL = (CounterValue & RTC_LSB_MASK); | |
RTC_ExitConfigMode(); | |
} | |
/** | |
* @brief Sets the RTC prescaler value. | |
* @param PrescalerValue: RTC prescaler new value. | |
* @retval None | |
*/ | |
void RTC_SetPrescaler(uint32_t PrescalerValue) | |
{ | |
/* Check the parameters */ | |
assert_param(IS_RTC_PRESCALER(PrescalerValue)); | |
RTC_EnterConfigMode(); | |
/* Set RTC PRESCALER MSB word */ | |
RTC->PRLH = (PrescalerValue & PRLH_MSB_MASK) >> 16; | |
/* Set RTC PRESCALER LSB word */ | |
RTC->PRLL = (PrescalerValue & RTC_LSB_MASK); | |
RTC_ExitConfigMode(); | |
} | |
/** | |
* @brief Sets the RTC alarm value. | |
* @param AlarmValue: RTC alarm new value. | |
* @retval None | |
*/ | |
void RTC_SetAlarm(uint32_t AlarmValue) | |
{ | |
RTC_EnterConfigMode(); | |
/* Set the ALARM MSB word */ | |
RTC->ALRH = AlarmValue >> 16; | |
/* Set the ALARM LSB word */ | |
RTC->ALRL = (AlarmValue & RTC_LSB_MASK); | |
RTC_ExitConfigMode(); | |
} | |
/** | |
* @brief Gets the RTC divider value. | |
* @param None | |
* @retval RTC Divider value. | |
*/ | |
uint32_t RTC_GetDivider(void) | |
{ | |
uint32_t tmp = 0x00; | |
tmp = ((uint32_t)RTC->DIVH & (uint32_t)0x000F) << 16; | |
tmp |= RTC->DIVL; | |
return tmp; | |
} | |
/** | |
* @brief Waits until last write operation on RTC registers has finished. | |
* @note This function must be called before any write to RTC registers. | |
* @param None | |
* @retval None | |
*/ | |
void RTC_WaitForLastTask(void) | |
{ | |
/* Loop until RTOFF flag is set */ | |
while ((RTC->CRL & RTC_FLAG_RTOFF) == (uint16_t)RESET) | |
{ | |
} | |
} | |
/** | |
* @brief Waits until the RTC registers (RTC_CNT, RTC_ALR and RTC_PRL) | |
* are synchronized with RTC APB clock. | |
* @note This function must be called before any read operation after an APB reset | |
* or an APB clock stop. | |
* @param None | |
* @retval None | |
*/ | |
void RTC_WaitForSynchro(void) | |
{ | |
/* Clear RSF flag */ | |
RTC->CRL &= (uint16_t)~RTC_FLAG_RSF; | |
/* Loop until RSF flag is set */ | |
while ((RTC->CRL & RTC_FLAG_RSF) == (uint16_t)RESET) | |
{ | |
} | |
} | |
/** | |
* @brief Checks whether the specified RTC flag is set or not. | |
* @param RTC_FLAG: specifies the flag to check. | |
* This parameter can be one the following values: | |
* @arg RTC_FLAG_RTOFF: RTC Operation OFF flag | |
* @arg RTC_FLAG_RSF: Registers Synchronized flag | |
* @arg RTC_FLAG_OW: Overflow flag | |
* @arg RTC_FLAG_ALR: Alarm flag | |
* @arg RTC_FLAG_SEC: Second flag | |
* @retval The new state of RTC_FLAG (SET or RESET). | |
*/ | |
FlagStatus RTC_GetFlagStatus(uint16_t RTC_FLAG) | |
{ | |
FlagStatus bitstatus = RESET; | |
/* Check the parameters */ | |
assert_param(IS_RTC_GET_FLAG(RTC_FLAG)); | |
if ((RTC->CRL & RTC_FLAG) != (uint16_t)RESET) | |
{ | |
bitstatus = SET; | |
} | |
else | |
{ | |
bitstatus = RESET; | |
} | |
return bitstatus; | |
} | |
/** | |
* @brief Clears the RTCs pending flags. | |
* @param RTC_FLAG: specifies the flag to clear. | |
* This parameter can be any combination of the following values: | |
* @arg RTC_FLAG_RSF: Registers Synchronized flag. This flag is cleared only after | |
* an APB reset or an APB Clock stop. | |
* @arg RTC_FLAG_OW: Overflow flag | |
* @arg RTC_FLAG_ALR: Alarm flag | |
* @arg RTC_FLAG_SEC: Second flag | |
* @retval None | |
*/ | |
void RTC_ClearFlag(uint16_t RTC_FLAG) | |
{ | |
/* Check the parameters */ | |
assert_param(IS_RTC_CLEAR_FLAG(RTC_FLAG)); | |
/* Clear the coressponding RTC flag */ | |
RTC->CRL &= (uint16_t)~RTC_FLAG; | |
} | |
/** | |
* @brief Checks whether the specified RTC interrupt has occured or not. | |
* @param RTC_IT: specifies the RTC interrupts sources to check. | |
* This parameter can be one of the following values: | |
* @arg RTC_IT_OW: Overflow interrupt | |
* @arg RTC_IT_ALR: Alarm interrupt | |
* @arg RTC_IT_SEC: Second interrupt | |
* @retval The new state of the RTC_IT (SET or RESET). | |
*/ | |
ITStatus RTC_GetITStatus(uint16_t RTC_IT) | |
{ | |
ITStatus bitstatus = RESET; | |
/* Check the parameters */ | |
assert_param(IS_RTC_GET_IT(RTC_IT)); | |
bitstatus = (ITStatus)(RTC->CRL & RTC_IT); | |
if (((RTC->CRH & RTC_IT) != (uint16_t)RESET) && (bitstatus != (uint16_t)RESET)) | |
{ | |
bitstatus = SET; | |
} | |
else | |
{ | |
bitstatus = RESET; | |
} | |
return bitstatus; | |
} | |
/** | |
* @brief Clears the RTCs interrupt pending bits. | |
* @param RTC_IT: specifies the interrupt pending bit to clear. | |
* This parameter can be any combination of the following values: | |
* @arg RTC_IT_OW: Overflow interrupt | |
* @arg RTC_IT_ALR: Alarm interrupt | |
* @arg RTC_IT_SEC: Second interrupt | |
* @retval None | |
*/ | |
void RTC_ClearITPendingBit(uint16_t RTC_IT) | |
{ | |
/* Check the parameters */ | |
assert_param(IS_RTC_IT(RTC_IT)); | |
/* Clear the coressponding RTC pending bit */ | |
RTC->CRL &= (uint16_t)~RTC_IT; | |
} | |
/** | |
* @} | |
*/ | |
/** | |
* @} | |
*/ | |
/** | |
* @} | |
*/ | |
/******************* (C) COPYRIGHT 2010 STMicroelectronics *****END OF FILE****/ |