/**
******************************************************************************
* @file stm32f10x_rtc.c
* @author MCD Application Team
* @version V3.5.0
* @date 11-March-2011
* @brief This file provides all the RTC firmware functions.
******************************************************************************
* @attention
*
* 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 2011 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 RTC's 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 corresponding RTC flag */
RTC->CRL &= (uint16_t)~RTC_FLAG;
}
/**
* @brief Checks whether the specified RTC interrupt has occurred 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 RTC's interrupt pending bits.
* @param RTC_IT: specifies the interrupt pe
