www.pudn.com > STM32F107-ucosii.rar > stm32f10x_rtc.c, change:2009-06-23,size:8667b


/** 
  ****************************************************************************** 
  * @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> 
  */  
 
/* Includes ------------------------------------------------------------------*/ 
#include "stm32f10x_rtc.h" 
 
/** @addtogroup STM32F10x_StdPeriph_Driver 
  * @{ 
  */ 
 
/** @defgroup RTC  
  * @brief RTC driver modules 
  * @{ 
  */ 
 
/** @defgroup RTC_Private_TypesDefinitions 
  * @{ 
  */  
/** 
  * @} 
  */ 
 
/** @defgroup RTC_Private_Defines 
  * @{ 
  */ 
 
#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 */ 
 
/** 
  * @} 
  */ 
 
/** @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 |= CRL_CNF_Set; 
} 
 
/** 
  * @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; 
} 
 
/** 
  * @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 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 RTC’s 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 2009 STMicroelectronics *****END OF FILE****/