HAL_lib/src/HAL_rtc.c

/**
******************************************************************************
* @file    HAL_rtc.c
* @author  AE Team
* @version V1.0.0
* @date    28/7/2017
* @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, MindMotion 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 2017 MindMotion</center></h2>
******************************************************************************
*/

/* Includes ------------------------------------------------------------------*/
#include "HAL_rtc.h"

/** @addtogroup
* @{
*/

/** @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 2017 MindMotion ----------------------*/