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/** |
****************************************************************************** |
* @file stm32f10x_rtc.c |
* @author MCD Application Team |
* @version V3.1.0 |
* @date 06/19/2009 |
* @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 2009 STMicroelectronics</center></h2> |
*/ |
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/* Includes ------------------------------------------------------------------*/ |
#include "stm32f10x_rtc.h" |
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/** @addtogroup STM32F10x_StdPeriph_Driver |
* @{ |
*/ |
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/** @defgroup RTC |
* @brief RTC driver modules |
* @{ |
*/ |
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/** @defgroup RTC_Private_TypesDefinitions |
* @{ |
*/ |
/** |
* @} |
*/ |
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/** @defgroup RTC_Private_Defines |
* @{ |
*/ |
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#define CRL_CNF_Set ((uint16_t)0x0010) /*!< Configuration Flag Enable Mask */ |
#define CRL_CNF_Reset ((uint16_t)0xFFEF) /*!< Configuration Flag Disable Mask */ |
#define RTC_LSB_Mask ((uint32_t)0x0000FFFF) /*!< RTC LSB Mask */ |
#define PRLH_MSB_Mask ((uint32_t)0x000F0000) /*!< RTC Prescaler MSB Mask */ |
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/** |
* @} |
*/ |
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/** @defgroup RTC_Private_Macros |
* @{ |
*/ |
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/** |
* @} |
*/ |
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/** @defgroup RTC_Private_Variables |
* @{ |
*/ |
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/** |
* @} |
*/ |
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/** @defgroup RTC_Private_FunctionPrototypes |
* @{ |
*/ |
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/** |
* @} |
*/ |
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/** @defgroup RTC_Private_Functions |
* @{ |
*/ |
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/** |
* @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)); |
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if (NewState != DISABLE) |
{ |
RTC->CRH |= RTC_IT; |
} |
else |
{ |
RTC->CRH &= (uint16_t)~RTC_IT; |
} |
} |
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/** |
* @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 |= CRL_CNF_Set; |
} |
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/** |
* @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 &= CRL_CNF_Reset; |
} |
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/** |
* @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) ; |
} |
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/** |
* @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(); |
} |
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/** |
* @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)); |
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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(); |
} |
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/** |
* @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(); |
} |
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/** |
* @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; |
} |
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/** |
* @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) |
{ |
} |
} |
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/** |
* @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) |
{ |
} |
} |
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/** |
* @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; |
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/* Check the parameters */ |
assert_param(IS_RTC_GET_FLAG(RTC_FLAG)); |
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if ((RTC->CRL & RTC_FLAG) != (uint16_t)RESET) |
{ |
bitstatus = SET; |
} |
else |
{ |
bitstatus = RESET; |
} |
return bitstatus; |
} |
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/** |
* @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)); |
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/* Clear the coressponding RTC flag */ |
RTC->CRL &= (uint16_t)~RTC_FLAG; |
} |
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/** |
* @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)); |
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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; |
} |
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/** |
* @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)); |
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/* Clear the coressponding RTC pending bit */ |
RTC->CRL &= (uint16_t)~RTC_IT; |
} |
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/** |
* @} |
*/ |
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/** |
* @} |
*/ |
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/** |
* @} |
*/ |
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/******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/ |