/******************** (C) COPYRIGHT 2007 STMicroelectronics ******************** | |
* File Name : stm32f10x_rtc.c | |
* Author : MCD Application Team | |
* Date First Issued : 09/29/2006 | |
* Description : This file provides all the RTC firmware functions. | |
******************************************************************************** | |
* History: | |
* 04/02/2007: V0.2 | |
* 02/05/2007: V0.1 | |
* 09/29/2006: V0.01 | |
******************************************************************************** | |
* THE PRESENT SOFTWARE 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 SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING | |
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. | |
*******************************************************************************/ | |
/* Includes ------------------------------------------------------------------*/ | |
#include "stm32f10x_rtc.h" | |
/* Private typedef -----------------------------------------------------------*/ | |
/* Private define ------------------------------------------------------------*/ | |
#define CRL_CNF_Set ((u16)0x0010) /* Configuration Flag Enable Mask */ | |
#define CRL_CNF_Reset ((u16)0xFFEF) /* Configuration Flag Disable Mask */ | |
#define RTC_LSB_Mask ((u32)0x0000FFFF) /* RTC LSB Mask */ | |
#define RTC_MSB_Mask ((u32)0xFFFF0000) /* RTC MSB Mask */ | |
#define PRLH_MSB_Mask ((u32)0x000F0000) /* RTC Prescaler MSB Mask */ | |
/* Private macro -------------------------------------------------------------*/ | |
/* Private variables ---------------------------------------------------------*/ | |
/* Private function prototypes -----------------------------------------------*/ | |
/* Private functions ---------------------------------------------------------*/ | |
/******************************************************************************* | |
* Function Name : RTC_ITConfig | |
* Description : Enables or disables the specified RTC interrupts. | |
* Input : - RTC_IT: specifies the RTC interrupts sources to be enabled | |
* or disabled. | |
* This parameter can be any combination of the following values: | |
* - RTC_IT_OW: Overflow interrupt | |
* - RTC_IT_ALR: Alarm interrupt | |
* - RTC_IT_SEC: Second interrupt | |
* - NewState: new state of the specified RTC interrupts. | |
* This parameter can be: ENABLE or DISABLE. | |
* Output : None | |
* Return : None | |
*******************************************************************************/ | |
void RTC_ITConfig(u16 RTC_IT, FunctionalState NewState) | |
{ | |
/* Check the parameters */ | |
assert(IS_RTC_IT(RTC_IT)); | |
assert(IS_FUNCTIONAL_STATE(NewState)); | |
if (NewState != DISABLE) | |
{ | |
RTC->CRH |= RTC_IT; | |
} | |
else | |
{ | |
RTC->CRH &= (u16)~RTC_IT; | |
} | |
} | |
/******************************************************************************* | |
* Function Name : RTC_EnterConfigMode | |
* Description : Enters the RTC configuration mode. | |
* Input : None | |
* Output : None | |
* Return : None | |
*******************************************************************************/ | |
void RTC_EnterConfigMode(void) | |
{ | |
/* Set the CNF flag to enter in the Configuration Mode */ | |
RTC->CRL |= CRL_CNF_Set; | |
} | |
/******************************************************************************* | |
* Function Name : RTC_ExitConfigMode | |
* Description : Exits from the RTC configuration mode. | |
* Input : None | |
* Output : None | |
* Return : None | |
*******************************************************************************/ | |
void RTC_ExitConfigMode(void) | |
{ | |
/* Reset the CNF flag to exit from the Configuration Mode */ | |
RTC->CRL &= CRL_CNF_Reset; | |
} | |
/******************************************************************************* | |
* Function Name : RTC_GetCounter | |
* Description : Gets the RTC counter value. | |
* Input : None | |
* Output : None | |
* Return : RTC counter value. | |
*******************************************************************************/ | |
u32 RTC_GetCounter(void) | |
{ | |
u16 tmp = 0; | |
tmp = RTC->CNTL; | |
return (((u32)RTC->CNTH << 16 ) | tmp) ; | |
} | |
/******************************************************************************* | |
* Function Name : RTC_SetCounter | |
* Description : Sets the RTC counter value. | |
* Input : - CounterValue: RTC counter new value. | |
* Output : None | |
* Return : None | |
*******************************************************************************/ | |
void RTC_SetCounter(u32 CounterValue) | |
{ | |
RTC_EnterConfigMode(); | |
/* Set RTC COUNTER MSB word */ | |
RTC->CNTH = (CounterValue & RTC_MSB_Mask) >> 16; | |
/* Set RTC COUNTER LSB word */ | |
RTC->CNTL = (CounterValue & RTC_LSB_Mask); | |
RTC_ExitConfigMode(); | |
} | |
/******************************************************************************* | |
* Function Name : RTC_GetPrescaler | |
* Description : Gets the RTC prescaler value. | |
* Input : None | |
* Output : None | |
* Return : RTC prescaler value. | |
*******************************************************************************/ | |
u32 RTC_GetPrescaler(void) | |
{ | |
u32 tmp = 0x00; | |
tmp = ((u32)RTC->PRLH & (u32)0x000F) << 0x10; | |
tmp |= RTC->PRLL; | |
return tmp; | |
} | |
/******************************************************************************* | |
* Function Name : RTC_SetPrescaler | |
* Description : Sets the RTC prescaler value. | |
* Input : - PrescalerValue: RTC prescaler new value. | |
* Output : None | |
* Return : None | |
*******************************************************************************/ | |
void RTC_SetPrescaler(u32 PrescalerValue) | |
{ | |
/* Check the parameters */ | |
assert(IS_RTC_PRESCALER(PrescalerValue)); | |
RTC_EnterConfigMode(); | |
/* Set RTC PRESCALER MSB word */ | |
RTC->PRLH = (PrescalerValue & PRLH_MSB_Mask) >> 0x10; | |
/* Set RTC PRESCALER LSB word */ | |
RTC->PRLL = (PrescalerValue & RTC_LSB_Mask); | |
RTC_ExitConfigMode(); | |
} | |
/******************************************************************************* | |
* Function Name : RTC_SetAlarm | |
* Description : Sets the RTC alarm value. | |
* Input : - AlarmValue: RTC alarm new value. | |
* Output : None | |
* Return : None | |
*******************************************************************************/ | |
void RTC_SetAlarm(u32 AlarmValue) | |
{ | |
RTC_EnterConfigMode(); | |
/* Set the ALARM MSB word */ | |
RTC->ALRH = (AlarmValue & RTC_MSB_Mask) >> 16; | |
/* Set the ALARM LSB word */ | |
RTC->ALRL = (AlarmValue & RTC_LSB_Mask); | |
RTC_ExitConfigMode(); | |
} | |
/******************************************************************************* | |
* Function Name : RTC_GetDivider | |
* Description : Gets the RTC divider value. | |
* Input : None | |
* Output : None | |
* Return : RTC Divider value. | |
*******************************************************************************/ | |
u32 RTC_GetDivider(void) | |
{ | |
u32 tmp = 0x00; | |
tmp = ((u32)RTC->DIVH & (u32)0x000F) << 0x10; | |
tmp |= RTC->DIVL; | |
return tmp; | |
} | |
/******************************************************************************* | |
* Function Name : RTC_WaitForLastTask | |
* Description : Waits until last write operation on RTC registers has finished. | |
* This function must be called before any write to RTC registers. | |
* Input : None | |
* Output : None | |
* Return : None | |
*******************************************************************************/ | |
void RTC_WaitForLastTask(void) | |
{ | |
/* Loop until RTOFF flag is set */ | |
while ((RTC->CRL & RTC_FLAG_RTOFF) == (u16)RESET) | |
{ | |
} | |
} | |
/******************************************************************************* | |
* Function Name : RTC_WaitForSynchro | |
* Description : Waits until the RTC registers (RTC_CNT, RTC_ALR and RTC_PRL) | |
* are synchronized with RTC APB clock. | |
* This function must be called before any read operation after | |
* an APB reset or an APB clock stop. | |
* Input : None | |
* Output : None | |
* Return : None | |
*******************************************************************************/ | |
void RTC_WaitForSynchro(void) | |
{ | |
/* Clear RSF flag */ | |
RTC->CRL &= (u16)~RTC_FLAG_RSF; | |
/* Loop until RSF flag is set */ | |
while ((RTC->CRL & RTC_FLAG_RSF) == (u16)RESET) | |
{ | |
} | |
} | |
/******************************************************************************* | |
* Function Name : RTC_GetFlagStatus | |
* Description : Checks whether the specified RTC flag is set or not. | |
* Input : - RTC_FLAG: specifies the flag to check. | |
* This parameter can be one the following values: | |
* - RTC_FLAG_RTOFF: RTC Operation OFF flag | |
* - RTC_FLAG_RSF: Registers Synchronized flag | |
* - RTC_FLAG_OW: Overflow flag | |
* - RTC_FLAG_ALR: Alarm flag | |
* - RTC_FLAG_SEC: Second flag | |
* Output : None | |
* Return : The new state of RTC_FLAG (SET or RESET). | |
*******************************************************************************/ | |
FlagStatus RTC_GetFlagStatus(u16 RTC_FLAG) | |
{ | |
FlagStatus bitstatus = RESET; | |
/* Check the parameters */ | |
assert(IS_RTC_GET_FLAG(RTC_FLAG)); | |
if ((RTC->CRL & RTC_FLAG) != (u16)RESET) | |
{ | |
bitstatus = SET; | |
} | |
else | |
{ | |
bitstatus = RESET; | |
} | |
return bitstatus; | |
} | |
/******************************************************************************* | |
* Function Name : RTC_ClearFlag | |
* Description : Clears the RTCs pending flags. | |
* Input : - RTC_FLAG: specifies the flag to clear. | |
* This parameter can be any combination of the following values: | |
* - RTC_FLAG_RSF: Registers Synchronized flag. This flag | |
* is cleared only after an APB reset or an APB Clock stop. | |
* - RTC_FLAG_OW: Overflow flag | |
* - RTC_FLAG_ALR: Alarm flag | |
* - RTC_FLAG_SEC: Second flag | |
* Output : None | |
* Return : None | |
*******************************************************************************/ | |
void RTC_ClearFlag(u16 RTC_FLAG) | |
{ | |
/* Check the parameters */ | |
assert(IS_RTC_CLEAR_FLAG(RTC_FLAG)); | |
/* Clear the coressponding RTC flag */ | |
RTC->CRL &= (u16)~RTC_FLAG; | |
} | |
/******************************************************************************* | |
* Function Name : RTC_GetITStatus | |
* Description : Checks whether the specified RTC interrupt has occured or not. | |
* Input : - RTC_IT: specifies the RTC interrupts sources to check. | |
* This parameter can be one of the following values: | |
* - RTC_IT_OW: Overflow interrupt | |
* - RTC_IT_ALR: Alarm interrupt | |
* - RTC_IT_SEC: Second interrupt | |
* Output : None | |
* Return : The new state of the RTC_IT (SET or RESET). | |
*******************************************************************************/ | |
ITStatus RTC_GetITStatus(u16 RTC_IT) | |
{ | |
ITStatus bitstatus = RESET; | |
/* Check the parameters */ | |
assert(IS_RTC_GET_IT(RTC_IT)); | |
bitstatus = (ITStatus)((RTC->CRL & RTC_IT) != (u16)RESET); | |
if (((RTC->CRH & RTC_IT) != (u16)RESET) && bitstatus) | |
{ | |
bitstatus = SET; | |
} | |
else | |
{ | |
bitstatus = RESET; | |
} | |
return bitstatus; | |
} | |
/******************************************************************************* | |
* Function Name : RTC_ClearITPendingBit | |
* Description : Clears the RTCs interrupt pending bits. | |
* Input : - RTC_IT: specifies the interrupt pending bit to clear. | |
* This parameter can be any combination of the following values: | |
* - RTC_IT_OW: Overflow interrupt | |
* - RTC_IT_ALR: Alarm interrupt | |
* - RTC_IT_SEC: Second interrupt | |
* Output : None | |
* Return : None | |
*******************************************************************************/ | |
void RTC_ClearITPendingBit(u16 RTC_IT) | |
{ | |
/* Check the parameters */ | |
assert(IS_RTC_IT(RTC_IT)); | |
/* Clear the coressponding RTC pending bit */ | |
RTC->CRL &= (u16)~RTC_IT; | |
} | |
/******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****/ |