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339 lines
8.1 KiB
339 lines
8.1 KiB
/**
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******************************************************************************
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* @file stm32f10x_rtc.c
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* @author MCD Application Team
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* @version V3.5.0
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* @date 11-March-2011
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* @brief This file provides all the RTC firmware functions.
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******************************************************************************
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* @attention
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*
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* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
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* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
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* TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
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* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
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* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
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* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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*
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* <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2>
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "stm32f10x_rtc.h"
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/** @addtogroup STM32F10x_StdPeriph_Driver
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* @{
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*/
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/** @defgroup RTC
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* @brief RTC driver modules
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* @{
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*/
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/** @defgroup RTC_Private_TypesDefinitions
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* @{
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*/
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/**
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* @}
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*/
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/** @defgroup RTC_Private_Defines
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* @{
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*/
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#define RTC_LSB_MASK ((uint32_t)0x0000FFFF) /*!< RTC LSB Mask */
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#define PRLH_MSB_MASK ((uint32_t)0x000F0000) /*!< RTC Prescaler MSB Mask */
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/**
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* @}
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*/
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/** @defgroup RTC_Private_Macros
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* @{
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*/
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/**
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* @}
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*/
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/** @defgroup RTC_Private_Variables
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* @{
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*/
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/**
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* @}
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*/
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/** @defgroup RTC_Private_FunctionPrototypes
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* @{
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*/
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/**
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* @}
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*/
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/** @defgroup RTC_Private_Functions
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* @{
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*/
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/**
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* @brief Enables or disables the specified RTC interrupts.
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* @param RTC_IT: specifies the RTC interrupts sources to be enabled or disabled.
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* This parameter can be any combination of the following values:
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* @arg RTC_IT_OW: Overflow interrupt
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* @arg RTC_IT_ALR: Alarm interrupt
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* @arg RTC_IT_SEC: Second interrupt
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* @param NewState: new state of the specified RTC interrupts.
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* This parameter can be: ENABLE or DISABLE.
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* @retval None
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*/
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void RTC_ITConfig(uint16_t RTC_IT, FunctionalState NewState)
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{
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/* Check the parameters */
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assert_param(IS_RTC_IT(RTC_IT));
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assert_param(IS_FUNCTIONAL_STATE(NewState));
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if (NewState != DISABLE)
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{
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RTC->CRH |= RTC_IT;
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}
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else
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{
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RTC->CRH &= (uint16_t)~RTC_IT;
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}
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}
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/**
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* @brief Enters the RTC configuration mode.
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* @param None
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* @retval None
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*/
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void RTC_EnterConfigMode(void)
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{
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/* Set the CNF flag to enter in the Configuration Mode */
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RTC->CRL |= RTC_CRL_CNF;
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}
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/**
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* @brief Exits from the RTC configuration mode.
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* @param None
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* @retval None
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*/
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void RTC_ExitConfigMode(void)
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{
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/* Reset the CNF flag to exit from the Configuration Mode */
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RTC->CRL &= (uint16_t)~((uint16_t)RTC_CRL_CNF);
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}
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/**
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* @brief Gets the RTC counter value.
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* @param None
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* @retval RTC counter value.
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*/
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uint32_t RTC_GetCounter(void)
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{
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uint16_t tmp = 0;
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tmp = RTC->CNTL;
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return (((uint32_t)RTC->CNTH << 16 ) | tmp) ;
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}
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/**
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* @brief Sets the RTC counter value.
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* @param CounterValue: RTC counter new value.
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* @retval None
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*/
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void RTC_SetCounter(uint32_t CounterValue)
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{
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RTC_EnterConfigMode();
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/* Set RTC COUNTER MSB word */
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RTC->CNTH = CounterValue >> 16;
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/* Set RTC COUNTER LSB word */
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RTC->CNTL = (CounterValue & RTC_LSB_MASK);
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RTC_ExitConfigMode();
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}
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/**
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* @brief Sets the RTC prescaler value.
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* @param PrescalerValue: RTC prescaler new value.
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* @retval None
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*/
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void RTC_SetPrescaler(uint32_t PrescalerValue)
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{
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/* Check the parameters */
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assert_param(IS_RTC_PRESCALER(PrescalerValue));
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RTC_EnterConfigMode();
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/* Set RTC PRESCALER MSB word */
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RTC->PRLH = (PrescalerValue & PRLH_MSB_MASK) >> 16;
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/* Set RTC PRESCALER LSB word */
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RTC->PRLL = (PrescalerValue & RTC_LSB_MASK);
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RTC_ExitConfigMode();
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}
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/**
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* @brief Sets the RTC alarm value.
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* @param AlarmValue: RTC alarm new value.
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* @retval None
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*/
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void RTC_SetAlarm(uint32_t AlarmValue)
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{
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RTC_EnterConfigMode();
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/* Set the ALARM MSB word */
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RTC->ALRH = AlarmValue >> 16;
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/* Set the ALARM LSB word */
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RTC->ALRL = (AlarmValue & RTC_LSB_MASK);
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RTC_ExitConfigMode();
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}
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/**
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* @brief Gets the RTC divider value.
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* @param None
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* @retval RTC Divider value.
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*/
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uint32_t RTC_GetDivider(void)
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{
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uint32_t tmp = 0x00;
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tmp = ((uint32_t)RTC->DIVH & (uint32_t)0x000F) << 16;
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tmp |= RTC->DIVL;
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return tmp;
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}
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/**
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* @brief Waits until last write operation on RTC registers has finished.
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* @note This function must be called before any write to RTC registers.
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* @param None
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* @retval None
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*/
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void RTC_WaitForLastTask(void)
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{
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/* Loop until RTOFF flag is set */
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while ((RTC->CRL & RTC_FLAG_RTOFF) == (uint16_t)RESET)
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{
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}
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}
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/**
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* @brief Waits until the RTC registers (RTC_CNT, RTC_ALR and RTC_PRL)
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* are synchronized with RTC APB clock.
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* @note This function must be called before any read operation after an APB reset
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* or an APB clock stop.
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* @param None
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* @retval None
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*/
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void RTC_WaitForSynchro(void)
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{
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/* Clear RSF flag */
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RTC->CRL &= (uint16_t)~RTC_FLAG_RSF;
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/* Loop until RSF flag is set */
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while ((RTC->CRL & RTC_FLAG_RSF) == (uint16_t)RESET)
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{
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}
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}
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/**
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* @brief Checks whether the specified RTC flag is set or not.
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* @param RTC_FLAG: specifies the flag to check.
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* This parameter can be one the following values:
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* @arg RTC_FLAG_RTOFF: RTC Operation OFF flag
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* @arg RTC_FLAG_RSF: Registers Synchronized flag
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* @arg RTC_FLAG_OW: Overflow flag
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* @arg RTC_FLAG_ALR: Alarm flag
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* @arg RTC_FLAG_SEC: Second flag
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* @retval The new state of RTC_FLAG (SET or RESET).
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*/
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FlagStatus RTC_GetFlagStatus(uint16_t RTC_FLAG)
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{
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FlagStatus bitstatus = RESET;
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/* Check the parameters */
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assert_param(IS_RTC_GET_FLAG(RTC_FLAG));
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if ((RTC->CRL & RTC_FLAG) != (uint16_t)RESET)
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{
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bitstatus = SET;
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}
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else
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{
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bitstatus = RESET;
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}
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return bitstatus;
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}
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/**
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* @brief Clears the RTC's pending flags.
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* @param RTC_FLAG: specifies the flag to clear.
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* This parameter can be any combination of the following values:
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* @arg RTC_FLAG_RSF: Registers Synchronized flag. This flag is cleared only after
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* an APB reset or an APB Clock stop.
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* @arg RTC_FLAG_OW: Overflow flag
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* @arg RTC_FLAG_ALR: Alarm flag
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* @arg RTC_FLAG_SEC: Second flag
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* @retval None
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*/
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void RTC_ClearFlag(uint16_t RTC_FLAG)
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{
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/* Check the parameters */
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assert_param(IS_RTC_CLEAR_FLAG(RTC_FLAG));
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/* Clear the corresponding RTC flag */
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RTC->CRL &= (uint16_t)~RTC_FLAG;
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}
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/**
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* @brief Checks whether the specified RTC interrupt has occurred or not.
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* @param RTC_IT: specifies the RTC interrupts sources to check.
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* This parameter can be one of the following values:
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* @arg RTC_IT_OW: Overflow interrupt
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* @arg RTC_IT_ALR: Alarm interrupt
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* @arg RTC_IT_SEC: Second interrupt
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* @retval The new state of the RTC_IT (SET or RESET).
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*/
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ITStatus RTC_GetITStatus(uint16_t RTC_IT)
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{
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ITStatus bitstatus = RESET;
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/* Check the parameters */
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assert_param(IS_RTC_GET_IT(RTC_IT));
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bitstatus = (ITStatus)(RTC->CRL & RTC_IT);
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if (((RTC->CRH & RTC_IT) != (uint16_t)RESET) && (bitstatus != (uint16_t)RESET))
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{
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bitstatus = SET;
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}
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else
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{
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bitstatus = RESET;
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}
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return bitstatus;
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}
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/**
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* @brief Clears the RTC's interrupt pending bits.
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* @param RTC_IT: specifies the interrupt pending bit to clear.
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* This parameter can be any combination of the following values:
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* @arg RTC_IT_OW: Overflow interrupt
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* @arg RTC_IT_ALR: Alarm interrupt
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* @arg RTC_IT_SEC: Second interrupt
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* @retval None
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*/
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void RTC_ClearITPendingBit(uint16_t RTC_IT)
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{
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/* Check the parameters */
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assert_param(IS_RTC_IT(RTC_IT));
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/* Clear the corresponding RTC pending bit */
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RTC->CRL &= (uint16_t)~RTC_IT;
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}
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/**
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* @}
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*/
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/**
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* @}
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*/
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/**
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* @}
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*/
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/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/
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