/**
******************************************************************************
* @file stm32f1xx_ll_rtc.c
* @author MCD Application Team
* @brief RTC LL module driver.
******************************************************************************
* @attention
*
* Copyright (c) 2016 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
#if defined(USE_FULL_LL_DRIVER)
/* Includes ------------------------------------------------------------------*/
#include "stm32f1xx_ll_rtc.h"
#include "stm32f1xx_ll_cortex.h"
#ifdef USE_FULL_ASSERT
#include "stm32_assert.h"
#else
#define assert_param(expr) ((void)0U)
#endif
/** @addtogroup STM32F1xx_LL_Driver
* @{
*/
#if defined(RTC)
/** @addtogroup RTC_LL
* @{
*/
/* Private types -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private constants ---------------------------------------------------------*/
/** @addtogroup RTC_LL_Private_Constants
* @{
*/
/* Default values used for prescaler */
#define RTC_ASYNCH_PRESC_DEFAULT 0x00007FFFU
/* Values used for timeout */
#define RTC_INITMODE_TIMEOUT 1000U /* 1s when tick set to 1ms */
#define RTC_SYNCHRO_TIMEOUT 1000U /* 1s when tick set to 1ms */
/**
* @}
*/
/* Private macros ------------------------------------------------------------*/
/** @addtogroup RTC_LL_Private_Macros
* @{
*/
#define IS_LL_RTC_ASYNCH_PREDIV(__VALUE__) ((__VALUE__) <= 0xFFFFFU)
#define IS_LL_RTC_FORMAT(__VALUE__) (((__VALUE__) == LL_RTC_FORMAT_BIN) \
|| ((__VALUE__) == LL_RTC_FORMAT_BCD))
#define IS_LL_RTC_HOUR24(__HOUR__) ((__HOUR__) <= 23U)
#define IS_LL_RTC_MINUTES(__MINUTES__) ((__MINUTES__) <= 59U)
#define IS_LL_RTC_SECONDS(__SECONDS__) ((__SECONDS__) <= 59U)
#define IS_LL_RTC_CALIB_OUTPUT(__OUTPUT__) (((__OUTPUT__) == LL_RTC_CALIB_OUTPUT_NONE) || \
((__OUTPUT__) == LL_RTC_CALIB_OUTPUT_RTCCLOCK) || \
((__OUTPUT__) == LL_RTC_CALIB_OUTPUT_ALARM) || \
((__OUTPUT__) == LL_RTC_CALIB_OUTPUT_SECOND))
/**
* @}
*/
/* Private function prototypes -----------------------------------------------*/
/* Exported functions --------------------------------------------------------*/
/** @addtogroup RTC_LL_Exported_Functions
* @{
*/
/** @addtogroup RTC_LL_EF_Init
* @{
*/
/**
* @brief De-Initializes the RTC registers to their default reset values.
* @note This function doesn't reset the RTC Clock source and RTC Backup Data
* registers.
* @param RTCx RTC Instance
* @retval An ErrorStatus enumeration value:
* - SUCCESS: RTC registers are de-initialized
* - ERROR: RTC registers are not de-initialized
*/
ErrorStatus LL_RTC_DeInit(RTC_TypeDef *RTCx)
{
ErrorStatus status = ERROR;
/* Check the parameter */
assert_param(IS_RTC_ALL_INSTANCE(RTCx));
/* Disable the write protection for RTC registers */
LL_RTC_DisableWriteProtection(RTCx);
/* Set Initialization mode */
if (LL_RTC_EnterInitMode(RTCx) != ERROR)
{
LL_RTC_WriteReg(RTCx, CNTL, 0x0000);
LL_RTC_WriteReg(RTCx, CNTH, 0x0000);
LL_RTC_WriteReg(RTCx, PRLH, 0x0000);
LL_RTC_WriteReg(RTCx, PRLL, 0x8000);
LL_RTC_WriteReg(RTCx, CRH, 0x0000);
LL_RTC_WriteReg(RTCx, CRL, 0x0020);
/* Reset Tamper and alternate functions configuration register */
LL_RTC_WriteReg(BKP, RTCCR, 0x00000000U);
LL_RTC_WriteReg(BKP, CR, 0x00000000U);
LL_RTC_WriteReg(BKP, CSR, 0x00000000U);
/* Exit Initialization Mode */
if (LL_RTC_ExitInitMode(RTCx) != ERROR)
{
/* Wait till the RTC RSF flag is set */
status = LL_RTC_WaitForSynchro(RTCx);
/* Clear RSF Flag */
LL_RTC_ClearFlag_RS(RTCx);
/* Enable the write protection for RTC registers */
LL_RTC_EnableWriteProtection(RTCx);
}
}
else
{
/* Enable the write protection for RTC registers */
LL_RTC_EnableWriteProtection(RTCx);
}
return status;
}
/**
* @brief Initializes the RTC registers according to the specified parameters
* in RTC_InitStruct.
* @param RTCx RTC Instance
* @param RTC_InitStruct pointer to a @ref LL_RTC_InitTypeDef structure that contains
* the configuration information for the RTC peripheral.
* @note The RTC Prescaler register is write protected and can be written in
* initialization mode only.
* @note the user should call LL_RTC_StructInit() or the structure of Prescaler
* need to be initialized before RTC init()
* @retval An ErrorStatus enumeration value:
* - SUCCESS: RTC registers are initialized
* - ERROR: RTC registers are not initialized
*/
ErrorStatus LL_RTC_Init(RTC_TypeDef *RTCx, LL_RTC_InitTypeDef *RTC_InitStruct)
{
ErrorStatus status = ERROR;
/* Check the parameters */
assert_param(IS_RTC_ALL_INSTANCE(RTCx));
assert_param(IS_LL_RTC_ASYNCH_PREDIV(RTC_InitStruct->AsynchPrescaler));
assert_param(IS_LL_RTC_CALIB_OUTPUT(RTC_InitStruct->OutPutSource));
/* Waiting for synchro */
if (LL_RTC_WaitForSynchro(RTCx) != ERROR)
{
/* Set Initialization mode */
if (LL_RTC_EnterInitMode(RTCx) != ERROR)
{
/* Clear Flag Bits */
LL_RTC_ClearFlag_ALR(RTCx);
LL_RTC_ClearFlag_OW(RTCx);
LL_RTC_ClearFlag_SEC(RTCx);
if (RTC_InitStruct->OutPutSource != LL_RTC_CALIB_OUTPUT_NONE)
{
/* Disable the selected Tamper Pin */
LL_RTC_TAMPER_Disable(BKP);
}
/* Set the signal which will be routed to RTC Tamper Pin */
LL_RTC_SetOutputSource(BKP, RTC_InitStruct->OutPutSource);
/* Configure Synchronous and Asynchronous prescaler factor */
LL_RTC_SetAsynchPrescaler(RTCx, RTC_InitStruct->AsynchPrescaler);
/* Exit Initialization Mode */
LL_RTC_ExitInitMode(RTCx);
status = SUCCESS;
}
}
return status;
}
/**
* @brief Set each @ref LL_RTC_InitTypeDef field to default value.
* @param RTC_InitStruct pointer to a @ref LL_RTC_InitTypeDef structure which will be initialized.
* @retval None
*/
void LL_RTC_StructInit(LL_RTC_InitTypeDef *RTC_InitStruct)
{
/* Set RTC_InitStruct fields to default values */
RTC_InitStruct->AsynchPrescaler = RTC_ASYNCH_PRESC_DEFAULT;
RTC_InitStruct->OutPutSource = LL_RTC_CALIB_OUTPUT_NONE;
}
/**
* @brief Set the RTC current time.
* @param RTCx RTC Instance
* @param RTC_Format This parameter can be one of the following values:
* @arg @ref LL_RTC_FORMAT_BIN
* @arg @ref LL_RTC_FORMAT_BCD
* @param RTC_TimeStruct pointer to a RTC_TimeTypeDef structure that contains
* the time configuration information for the RTC.
* @note The user should call LL_RTC_TIME_StructInit() or the structure
* of time need to be initialized before time init()
* @retval An ErrorStatus enumeration value:
* - SUCCESS: RTC Time register is configured
* - ERROR: RTC Time register is not configured
*/
ErrorStatus LL_RTC_TIME_Init(RTC_TypeDef *RTCx, uint32_t RTC_Format, LL_RTC_TimeTypeDef *RTC_TimeStruct)
{
ErrorStatus status = ERROR;
uint32_t counter_time = 0U;
/* Check the parameters */
assert_param(IS_RTC_ALL_INSTANCE(RTCx));
assert_param(IS_LL_RTC_FORMAT(RTC_Format));
if (RTC_Format == LL_RTC_FORMAT_BIN)
{
assert_param(IS_LL_RTC_HOUR24(RTC_TimeStruct->Hours));
assert_param(IS_LL_RTC_MINUTES(RTC_TimeStruct->Minutes));
assert_param(IS_LL_RTC_SECONDS(RTC_TimeStruct->Seconds));
}
else
{
assert_param(IS_LL_RTC_HOUR24(__LL_RTC_CONVERT_BCD2BIN(RTC_TimeStruct->Hours)));
assert_param(IS_LL_RTC_MINUTES(__LL_RTC_CONVERT_BCD2BIN(RTC_TimeStruct->Minutes)));
assert_param(IS_LL_RTC_SECONDS(__LL_RTC_CONVERT_BCD2BIN(RTC_TimeStruct->Seconds)));
}
/* Enter Initialization mode */
if (LL_RTC_EnterInitMode(RTCx) != ERROR)
{
/* Check the input parameters format */
if (RTC_Format == LL_RTC_FORMAT_BIN)
{
counter_time = (uint32_t)(((uint32_t)RTC_TimeStruct->Hours * 3600U) + \
((uint32_t)RTC_TimeStruct->Minutes * 60U) + \
((uint32_t)RTC_TimeStruct->Seconds));
LL_RTC_TIME_Set(RTCx, counter_time);
}
else
{
counter_time = (((uint32_t)(__LL_RTC_CONVERT_BCD2BIN(RTC_TimeStruct->Hours)) * 3600U) + \
((uint32_t)(__LL_RTC_CONVERT_BCD2BIN(RTC_TimeStruct->Minutes)) * 60U) + \
((uint32_t)(__LL_RTC_CONVERT_BCD2BIN(RTC_TimeStruct->Seconds))));
LL_RTC_TIME_Set(RTCx, counter_time);
}
status = SUCCESS;
}
/* Exit Initialization mode */
LL_RTC_ExitInitMode(RTCx);
return status;
}
/**
* @brief Set each @ref LL_RTC_TimeTypeDef field to default value (Time = 00h:00min:00sec).
* @param RTC_TimeStruct pointer to a @ref LL_RTC_TimeTypeDef structure which will be initialized.
* @retval None
*/
void LL_RTC_TIME_StructInit(LL_RTC_TimeTypeDef *RTC_TimeStruct)
{
/* Time = 00h:00min:00sec */
RTC_TimeStruct->Hours = 0U;
RTC_TimeStruct->Minutes = 0U;
RTC_TimeStruct->Seconds = 0U;
}
/**
* @brief Set the RTC Alarm.
* @param RTCx RTC Instance
* @param RTC_Format This parameter can be one of the following values:
* @arg @ref LL_RTC_FORMAT_BIN
* @arg @ref LL_RTC_FORMAT_BCD
* @param RTC_AlarmStruct pointer to a @ref LL_RTC_AlarmTypeDef structure that
* contains the alarm configuration parameters.
* @note the user should call LL_RTC_ALARM_StructInit() or the structure
* of Alarm need to be initialized before Alarm init()
* @retval An ErrorStatus enumeration value:
* - SUCCESS: ALARM registers are configured
* - ERROR: ALARM registers are not configured
*/
ErrorStatus LL_RTC_ALARM_Init(RTC_TypeDef *RTCx, uint32_t RTC_Format, LL_RTC_AlarmTypeDef *RTC_AlarmStruct)
{
ErrorStatus status = ERROR;
uint32_t counter_alarm = 0U;
/* Check the parameters */
assert_param(IS_RTC_ALL_INSTANCE(RTCx));
assert_param(IS_LL_RTC_FORMAT(RTC_Format));
if (RTC_Format == LL_RTC_FORMAT_BIN)
{
assert_param(IS_LL_RTC_HOUR24(RTC_AlarmStruct->AlarmTime.Hours));
assert_param(IS_LL_RTC_MINUTES(RTC_AlarmStruct->AlarmTime.Minutes));
assert_param(IS_LL_RTC_SECONDS(RTC_AlarmStruct->AlarmTime.Seconds));
}
else
{
assert_param(IS_LL_RTC_HOUR24(__LL_RTC_CONVERT_BCD2BIN(RTC_AlarmStruct->AlarmTime.Hours)));
assert_param(IS_LL_RTC_MINUTES(__LL_RTC_CONVERT_BCD2BIN(RTC_AlarmStruct->AlarmTime.Minutes)));
assert_param(IS_LL_RTC_SECONDS(__LL_RTC_CONVERT_BCD2BIN(RTC_AlarmStruct->AlarmTime.Seconds)));
}
/* Enter Initialization mode */
if (LL_RTC_EnterInitMode(RTCx) != ERROR)
{
/* Check the input parameters format */
if (RTC_Format == LL_RTC_FORMAT_BIN)
{
counter_alarm = (uint32_t)(((uint32_t)RTC_AlarmStruct->AlarmTime.Hours * 3600U) + \
((uint32_t)RTC_AlarmStruct->AlarmTime.Minutes * 60U) + \
((uint32_t)RTC_AlarmStruct->AlarmTime.Seconds));
LL_RTC_ALARM_Set(RTCx, counter_alarm);
}
else
{
counter_alarm = (((uint32_t)(__LL_RTC_CONVERT_BCD2BIN(RTC_AlarmStruct->AlarmTime.Hours)) * 3600U) + \
((uint32_t)(__LL_RTC_CONVERT_BCD2BIN(RTC_AlarmStruct->AlarmTime.Minutes)) * 60U) + \
((uint32_t)(__LL_RTC_CONVERT_BCD2BIN(RTC_AlarmStruct->AlarmTime.Seconds))));
LL_RTC_ALARM_Set(RTCx, counter_alarm);
}
status = SUCCESS;
}
/* Exit Initialization mode */
LL_RTC_ExitInitMode(RTCx);
return status;
}
/**
* @brief Set each @ref LL_RTC_AlarmTypeDef of ALARM field to default value (Time = 00h:00mn:00sec /
* Day = 1st day of the month/Mask = all fields are masked).
* @param RTC_AlarmStruct pointer to a @ref LL_RTC_AlarmTypeDef structure which will be initialized.
* @retval None
*/
void LL_RTC_ALARM_StructInit(LL_RTC_AlarmTypeDef *RTC_AlarmStruct)
{
/* Alarm Time Settings : Time = 00h:00mn:00sec */
RTC_AlarmStruct->AlarmTime.Hours = 0U;
RTC_AlarmStruct->AlarmTime.Minutes = 0U;
RTC_AlarmStruct->AlarmTime.Seconds = 0U;
}
/**
* @brief Enters the RTC Initialization mode.
* @param RTCx RTC Instance
* @retval An ErrorStatus enumeration value:
* - SUCCESS: RTC is in Init mode
* - ERROR: RTC is not in Init mode
*/
ErrorStatus LL_RTC_EnterInitMode(RTC_TypeDef *RTCx)
{
__IO uint32_t timeout = RTC_INITMODE_TIMEOUT;
ErrorStatus status = SUCCESS;
uint32_t tmp = 0U;
/* Check the parameter */
assert_param(IS_RTC_ALL_INSTANCE(RTCx));
/* Wait till RTC is in INIT state and if Time out is reached exit */
tmp = LL_RTC_IsActiveFlag_RTOF(RTCx);
while ((timeout != 0U) && (tmp != 1U))
{
if (LL_SYSTICK_IsActiveCounterFlag() == 1U)
{
timeout --;
}
tmp = LL_RTC_IsActiveFlag_RTOF(RTCx);
if (timeout == 0U)
{
status = ERROR;
}
}
/* Disable the write protection for RTC registers */
LL_RTC_DisableWriteProtection(RTCx);
return status;
}
/**
* @brief Exit the RTC Initialization mode.
* @note When the initialization sequence is complete, the calendar restarts
* counting after 4 RTCCLK cycles.
* @param RTCx RTC Instance
* @retval An ErrorStatus enumeration value:
* - SUCCESS: RTC exited from in Init mode
* - ERROR: Not applicable
*/
ErrorStatus LL_RTC_ExitInitMode(RTC_TypeDef *RTCx)
{
__IO uint32_t timeout = RTC_INITMODE_TIMEOUT;
ErrorStatus status = SUCCESS;
uint32_t tmp = 0U;
/* Check the parameter */
assert_param(IS_RTC_ALL_INSTANCE(RTCx));
/* Disable initialization mode */
LL_RTC_EnableWriteProtection(RTCx);
/* Wait till RTC is in INIT state and if Time out is reached exit */
tmp = LL_RTC_IsActiveFlag_RTOF(RTCx);
while ((timeout != 0U) && (tmp != 1U))
{
if (LL_SYSTICK_IsActiveCounterFlag() == 1U)
{
timeout --;
}
tmp = LL_RTC_IsActiveFlag_RTOF(RTCx);
if (timeout == 0U)
{
status = ERROR;
}
}
return status;
}
/**
* @brief Set the Time Counter
* @param RTCx RTC Instance
* @param TimeCounter this value can be from 0 to 0xFFFFFFFF
* @retval An ErrorStatus enumeration value:
* - SUCCESS: RTC Counter register configured
* - ERROR: Not applicable
*/
ErrorStatus LL_RTC_TIME_SetCounter(RTC_TypeDef *RTCx, uint32_t TimeCounter)
{
ErrorStatus status = ERROR;
/* Check the parameter */
assert_param(IS_RTC_ALL_INSTANCE(RTCx));
/* Enter Initialization mode */
if (LL_RTC_EnterInitMode(RTCx) != ERROR)
{
LL_RTC_TIME_Set(RTCx, TimeCounter);
status = SUCCESS;
}
/* Exit Initialization mode */
LL_RTC_ExitInitMode(RTCx);
return status;
}
/**
* @brief Set Alarm Counter.
* @param RTCx RTC Instance
* @param AlarmCounter this value can be from 0 to 0xFFFFFFFF
* @retval An ErrorStatus enumeration value:
* - SUCCESS: RTC exited from in Init mode
* - ERROR: Not applicable
*/
ErrorStatus LL_RTC_ALARM_SetCounter(RTC_TypeDef *RTCx, uint32_t AlarmCounter)
{
ErrorStatus status = ERROR;
/* Check the parameter */
assert_param(IS_RTC_ALL_INSTANCE(RTCx));
/* Enter Initialization mode */
if (LL_RTC_EnterInitMode(RTCx) != ERROR)
{
LL_RTC_ALARM_Set(RTCx, AlarmCounter);
status = SUCCESS;
}
/* Exit Initialization mode */
LL_RTC_ExitInitMode(RTCx);
return status;
}
/**
* @brief Waits until the RTC registers are synchronized with RTC APB clock.
* @note The RTC Resynchronization mode is write protected, use the
* @ref LL_RTC_DisableWriteProtection before calling this function.
* @param RTCx RTC Instance
* @retval An ErrorStatus enumeration value:
* - SUCCESS: RTC registers are synchronised
* - ERROR: RTC registers are not synchronised
*/
ErrorStatus LL_RTC_WaitForSynchro(RTC_TypeDef *RTCx)
{
__IO uint32_t timeout = RTC_SYNCHRO_TIMEOUT;
ErrorStatus status = SUCCESS;
uint32_t tmp = 0U;
/* Check the parameter */
assert_param(IS_RTC_ALL_INSTANCE(RTCx));
/* Clear RSF flag */
LL_RTC_ClearFlag_RS(RTCx);
/* Wait the registers to be synchronised */
tmp = LL_RTC_IsActiveFlag_RS(RTCx);
while ((timeout != 0U) && (tmp != 0U))
{
if (LL_SYSTICK_IsActiveCounterFlag() == 1U)
{
timeout--;
}
tmp = LL_RTC_IsActiveFlag_RS(RTCx);
if (timeout == 0U)
{
status = ERROR;
}
}
return (status);
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
#endif /* defined(RTC) */
/**
* @}
*/
#endif /* USE_FULL_LL_DRIVER */