AMiRo-OS

/**

  ******************************************************************************

  * @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>&copy; 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 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 corresponding RTC pending bit */

  RTC->CRL &= (uint16_t)~RTC_IT;

}

/**

  * @}

  */

/**

  * @}

  */

/**

  * @}

  */

/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/