- /******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
- * File Name : stm32f10x_rtc.c
- * Author : MCD Application Team
- * Version : V2.0.2
- * Date : 07/11/2008
- * Description : This file provides all the RTC firmware functions.
- ********************************************************************************
- * 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.
- *******************************************************************************/
- /* Includes ------------------------------------------------------------------*/
- #include "stm32f10x_rtc.h"
- /* Private typedef -----------------------------------------------------------*/
- /* Private define ------------------------------------------------------------*/
- #define CRL_CNF_Set ((u16)0x0010) /* Configuration Flag Enable Mask */
- #define CRL_CNF_Reset ((u16)0xFFEF) /* Configuration Flag Disable Mask */
- #define RTC_LSB_Mask ((u32)0x0000FFFF) /* RTC LSB Mask */
- #define PRLH_MSB_Mask ((u32)0x000F0000) /* RTC Prescaler MSB Mask */
- /* Private macro -------------------------------------------------------------*/
- /* Private variables ---------------------------------------------------------*/
- /* Private function prototypes -----------------------------------------------*/
- /* Private functions ---------------------------------------------------------*/
- /*******************************************************************************
- * Function Name : RTC_ITConfig
- * Description : Enables or disables the specified RTC interrupts.
- * Input : - RTC_IT: specifies the RTC interrupts sources to be enabled
- * or disabled.
- * This parameter can be any combination of the following values:
- * - RTC_IT_OW: Overflow interrupt
- * - RTC_IT_ALR: Alarm interrupt
- * - RTC_IT_SEC: Second interrupt
- * - NewState: new state of the specified RTC interrupts.
- * This parameter can be: ENABLE or DISABLE.
- * Output : None
- * Return : None
- *******************************************************************************/
- void RTC_ITConfig(u16 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 &= (u16)~RTC_IT;
- }
- }
- /*******************************************************************************
- * Function Name : RTC_EnterConfigMode
- * Description : Enters the RTC configuration mode.
- * Input : None
- * Output : None
- * Return : None
- *******************************************************************************/
- void RTC_EnterConfigMode(void)
- {
- /* Set the CNF flag to enter in the Configuration Mode */
- RTC->CRL |= CRL_CNF_Set;
- }
- /*******************************************************************************
- * Function Name : RTC_ExitConfigMode
- * Description : Exits from the RTC configuration mode.
- * Input : None
- * Output : None
- * Return : None
- *******************************************************************************/
- void RTC_ExitConfigMode(void)
- {
- /* Reset the CNF flag to exit from the Configuration Mode */
- RTC->CRL &= CRL_CNF_Reset;
- }
- /*******************************************************************************
- * Function Name : RTC_GetCounter
- * Description : Gets the RTC counter value.
- * Input : None
- * Output : None
- * Return : RTC counter value.
- *******************************************************************************/
- u32 RTC_GetCounter(void)
- {
- u16 tmp = 0;
- tmp = RTC->CNTL;
- return (((u32)RTC->CNTH << 16 ) | tmp) ;
- }
- /*******************************************************************************
- * Function Name : RTC_SetCounter
- * Description : Sets the RTC counter value.
- * Input : - CounterValue: RTC counter new value.
- * Output : None
- * Return : None
- *******************************************************************************/
- void RTC_SetCounter(u32 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();
- }
- /*******************************************************************************
- * Function Name : RTC_SetPrescaler
- * Description : Sets the RTC prescaler value.
- * Input : - PrescalerValue: RTC prescaler new value.
- * Output : None
- * Return : None
- *******************************************************************************/
- void RTC_SetPrescaler(u32 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();
- }
- /*******************************************************************************
- * Function Name : RTC_SetAlarm
- * Description : Sets the RTC alarm value.
- * Input : - AlarmValue: RTC alarm new value.
- * Output : None
- * Return : None
- *******************************************************************************/
- void RTC_SetAlarm(u32 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();
- }
- /*******************************************************************************
- * Function Name : RTC_GetDivider
- * Description : Gets the RTC divider value.
- * Input : None
- * Output : None
- * Return : RTC Divider value.
- *******************************************************************************/
- u32 RTC_GetDivider(void)
- {
- u32 tmp = 0x00;
- tmp = ((u32)RTC->DIVH & (u32)0x000F) << 16;
- tmp |= RTC->DIVL;
- return tmp;
- }
- /*******************************************************************************
- * Function Name : RTC_WaitForLastTask
- * Description : Waits until last write operation on RTC registers has finished.
- * This function must be called before any write to RTC registers.
- * Input : None
- * Output : None
- * Return : None
- *******************************************************************************/
- void RTC_WaitForLastTask(void)
- {
- /* Loop until RTOFF flag is set */
- while ((RTC->CRL & RTC_FLAG_RTOFF) == (u16)RESET)
- {
- }
- }
- /*******************************************************************************
- * Function Name : RTC_WaitForSynchro
- * Description : Waits until the RTC registers (RTC_CNT, RTC_ALR and RTC_PRL)
- * are synchronized with RTC APB clock.
- * This function must be called before any read operation after
- * an APB reset or an APB clock stop.
- * Input : None
- * Output : None
- * Return : None
- *******************************************************************************/
- void RTC_WaitForSynchro(void)
- {
- /* Clear RSF flag */
- RTC->CRL &= (u16)~RTC_FLAG_RSF;
- /* Loop until RSF flag is set */
- while ((RTC->CRL & RTC_FLAG_RSF) == (u16)RESET)
- {
- }
- }
- /*******************************************************************************
- * Function Name : RTC_GetFlagStatus
- * Description : Checks whether the specified RTC flag is set or not.
- * Input : - RTC_FLAG: specifies the flag to check.
- * This parameter can be one the following values:
- * - RTC_FLAG_RTOFF: RTC Operation OFF flag
- * - RTC_FLAG_RSF: Registers Synchronized flag
- * - RTC_FLAG_OW: Overflow flag
- * - RTC_FLAG_ALR: Alarm flag
- * - RTC_FLAG_SEC: Second flag
- * Output : None
- * Return : The new state of RTC_FLAG (SET or RESET).
- *******************************************************************************/
- FlagStatus RTC_GetFlagStatus(u16 RTC_FLAG)
- {
- FlagStatus bitstatus = RESET;
- /* Check the parameters */
- assert_param(IS_RTC_GET_FLAG(RTC_FLAG));
- if ((RTC->CRL & RTC_FLAG) != (u16)RESET)
- {
- bitstatus = SET;
- }
- else
- {
- bitstatus = RESET;
- }
- return bitstatus;
- }
- /*******************************************************************************
- * Function Name : RTC_ClearFlag
- * Description : Clears the RTC抯 pending flags.
- * Input : - RTC_FLAG: specifies the flag to clear.
- * This parameter can be any combination of the following values:
- * - RTC_FLAG_RSF: Registers Synchronized flag. This flag
- * is cleared only after an APB reset or an APB Clock stop.
- * - RTC_FLAG_OW: Overflow flag
- * - RTC_FLAG_ALR: Alarm flag
- * - RTC_FLAG_SEC: Second flag
- * Output : None
- * Return : None
- *******************************************************************************/
- void RTC_ClearFlag(u16 RTC_FLAG)
- {
- /* Check the parameters */
- assert_param(IS_RTC_CLEAR_FLAG(RTC_FLAG));
- /* Clear the coressponding RTC flag */
- RTC->CRL &= (u16)~RTC_FLAG;
- }
- /*******************************************************************************
- * Function Name : RTC_GetITStatus
- * Description : Checks whether the specified RTC interrupt has occured or not.
- * Input : - RTC_IT: specifies the RTC interrupts sources to check.
- * This parameter can be one of the following values:
- * - RTC_IT_OW: Overflow interrupt
- * - RTC_IT_ALR: Alarm interrupt
- * - RTC_IT_SEC: Second interrupt
- * Output : None
- * Return : The new state of the RTC_IT (SET or RESET).
- *******************************************************************************/
- ITStatus RTC_GetITStatus(u16 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) != (u16)RESET) && (bitstatus != (u16)RESET))
- {
- bitstatus = SET;
- }
- else
- {
- bitstatus = RESET;
- }
- return bitstatus;
- }
- /*******************************************************************************
- * Function Name : RTC_ClearITPendingBit
- * Description : Clears the RTC抯 interrupt pending bits.
- * Input : - RTC_IT: specifies the interrupt pending bit to clear.
- * This parameter can be any combination of the following values:
- * - RTC_IT_OW: Overflow interrupt
- * - RTC_IT_ALR: Alarm interrupt
- * - RTC_IT_SEC: Second interrupt
- * Output : None
- * Return : None
- *******************************************************************************/
- void RTC_ClearITPendingBit(u16 RTC_IT)
- {
- /* Check the parameters */
- assert_param(IS_RTC_IT(RTC_IT));
- /* Clear the coressponding RTC pending bit */
- RTC->CRL &= (u16)~RTC_IT;
- }
- /******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/