343 lines
12 KiB
C
343 lines
12 KiB
C
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/******************** (C) COPYRIGHT 2007 STMicroelectronics ********************
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* File Name : stm32f10x_rtc.c
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* Author : MCD Application Team
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* Date First Issued : 09/29/2006
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* Description : This file provides all the RTC firmware functions.
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********************************************************************************
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* History:
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* 04/02/2007: V0.2
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* 02/05/2007: V0.1
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* 09/29/2006: V0.01
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********************************************************************************
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* THE PRESENT SOFTWARE 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 TIME.
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* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
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* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
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* CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
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* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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*******************************************************************************/
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/* Includes ------------------------------------------------------------------*/
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#include "stm32f10x_rtc.h"
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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#define CRL_CNF_Set ((u16)0x0010) /* Configuration Flag Enable Mask */
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#define CRL_CNF_Reset ((u16)0xFFEF) /* Configuration Flag Disable Mask */
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#define RTC_LSB_Mask ((u32)0x0000FFFF) /* RTC LSB Mask */
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#define RTC_MSB_Mask ((u32)0xFFFF0000) /* RTC MSB Mask */
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#define PRLH_MSB_Mask ((u32)0x000F0000) /* RTC Prescaler MSB Mask */
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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/* Private functions ---------------------------------------------------------*/
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/*******************************************************************************
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* Function Name : RTC_ITConfig
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* Description : Enables or disables the specified RTC interrupts.
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* Input : - RTC_IT: specifies the RTC interrupts sources to be enabled
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* or disabled.
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* This parameter can be any combination of the following values:
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* - RTC_IT_OW: Overflow interrupt
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* - RTC_IT_ALR: Alarm interrupt
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* - RTC_IT_SEC: Second interrupt
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* - NewState: new state of the specified RTC interrupts.
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* This parameter can be: ENABLE or DISABLE.
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* Output : None
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* Return : None
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*******************************************************************************/
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void RTC_ITConfig(u16 RTC_IT, FunctionalState NewState)
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{
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/* Check the parameters */
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assert(IS_RTC_IT(RTC_IT));
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assert(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 &= (u16)~RTC_IT;
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}
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}
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/*******************************************************************************
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* Function Name : RTC_EnterConfigMode
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* Description : Enters the RTC configuration mode.
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* Input : None
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* Output : None
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* Return : 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 |= CRL_CNF_Set;
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}
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/*******************************************************************************
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* Function Name : RTC_ExitConfigMode
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* Description : Exits from the RTC configuration mode.
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* Input : None
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* Output : None
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* Return : 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 &= CRL_CNF_Reset;
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}
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/*******************************************************************************
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* Function Name : RTC_GetCounter
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* Description : Gets the RTC counter value.
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* Input : None
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* Output : None
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* Return : RTC counter value.
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*******************************************************************************/
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u32 RTC_GetCounter(void)
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{
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u16 tmp = 0;
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tmp = RTC->CNTL;
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return (((u32)RTC->CNTH << 16 ) | tmp) ;
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}
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/*******************************************************************************
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* Function Name : RTC_SetCounter
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* Description : Sets the RTC counter value.
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* Input : - CounterValue: RTC counter new value.
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* Output : None
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* Return : None
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*******************************************************************************/
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void RTC_SetCounter(u32 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 & RTC_MSB_Mask) >> 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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* Function Name : RTC_GetPrescaler
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* Description : Gets the RTC prescaler value.
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* Input : None
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* Output : None
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* Return : RTC prescaler value.
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*******************************************************************************/
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u32 RTC_GetPrescaler(void)
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{
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u32 tmp = 0x00;
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tmp = ((u32)RTC->PRLH & (u32)0x000F) << 0x10;
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tmp |= RTC->PRLL;
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return tmp;
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}
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/*******************************************************************************
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* Function Name : RTC_SetPrescaler
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* Description : Sets the RTC prescaler value.
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* Input : - PrescalerValue: RTC prescaler new value.
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* Output : None
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* Return : None
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*******************************************************************************/
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void RTC_SetPrescaler(u32 PrescalerValue)
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{
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/* Check the parameters */
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assert(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) >> 0x10;
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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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* Function Name : RTC_SetAlarm
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* Description : Sets the RTC alarm value.
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* Input : - AlarmValue: RTC alarm new value.
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* Output : None
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* Return : None
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*******************************************************************************/
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void RTC_SetAlarm(u32 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 & RTC_MSB_Mask) >> 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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* Function Name : RTC_GetDivider
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* Description : Gets the RTC divider value.
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* Input : None
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* Output : None
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* Return : RTC Divider value.
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*******************************************************************************/
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u32 RTC_GetDivider(void)
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{
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u32 tmp = 0x00;
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tmp = ((u32)RTC->DIVH & (u32)0x000F) << 0x10;
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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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* Function Name : RTC_WaitForLastTask
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* Description : Waits until last write operation on RTC registers has finished.
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* This function must be called before any write to RTC registers.
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* Input : None
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* Output : None
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* Return : 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) == (u16)RESET)
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{
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}
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}
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/*******************************************************************************
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* Function Name : RTC_WaitForSynchro
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* Description : 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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* This function must be called before any read operation after
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* an APB reset or an APB clock stop.
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* Input : None
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* Output : None
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* Return : 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 &= (u16)~RTC_FLAG_RSF;
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/* Loop until RSF flag is set */
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while ((RTC->CRL & RTC_FLAG_RSF) == (u16)RESET)
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{
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}
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}
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/*******************************************************************************
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* Function Name : RTC_GetFlagStatus
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* Description : Checks whether the specified RTC flag is set or not.
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* Input : - RTC_FLAG: specifies the flag to check.
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* This parameter can be one the following values:
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* - RTC_FLAG_RTOFF: RTC Operation OFF flag
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* - RTC_FLAG_RSF: Registers Synchronized flag
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* - RTC_FLAG_OW: Overflow flag
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* - RTC_FLAG_ALR: Alarm flag
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* - RTC_FLAG_SEC: Second flag
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* Output : None
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* Return : The new state of RTC_FLAG (SET or RESET).
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*******************************************************************************/
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FlagStatus RTC_GetFlagStatus(u16 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(IS_RTC_GET_FLAG(RTC_FLAG));
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if ((RTC->CRL & RTC_FLAG) != (u16)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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* Function Name : RTC_ClearFlag
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* Description : Clears the RTC<EFBFBD>s pending flags.
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* Input : - 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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* - RTC_FLAG_RSF: Registers Synchronized flag. This flag
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* is cleared only after an APB reset or an APB Clock stop.
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* - RTC_FLAG_OW: Overflow flag
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* - RTC_FLAG_ALR: Alarm flag
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* - RTC_FLAG_SEC: Second flag
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* Output : None
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* Return : None
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*******************************************************************************/
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void RTC_ClearFlag(u16 RTC_FLAG)
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{
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/* Check the parameters */
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assert(IS_RTC_CLEAR_FLAG(RTC_FLAG));
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/* Clear the coressponding RTC flag */
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RTC->CRL &= (u16)~RTC_FLAG;
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}
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/*******************************************************************************
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* Function Name : RTC_GetITStatus
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* Description : Checks whether the specified RTC interrupt has occured or not.
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* Input : - 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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* - RTC_IT_OW: Overflow interrupt
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* - RTC_IT_ALR: Alarm interrupt
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* - RTC_IT_SEC: Second interrupt
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* Output : None
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* Return : The new state of the RTC_IT (SET or RESET).
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*******************************************************************************/
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ITStatus RTC_GetITStatus(u16 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(IS_RTC_GET_IT(RTC_IT));
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bitstatus = (ITStatus)((RTC->CRL & RTC_IT) != (u16)RESET);
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if (((RTC->CRH & RTC_IT) != (u16)RESET) && bitstatus)
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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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* Function Name : RTC_ClearITPendingBit
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* Description : Clears the RTC<EFBFBD>s interrupt pending bits.
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* Input : - 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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* - RTC_IT_OW: Overflow interrupt
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* - RTC_IT_ALR: Alarm interrupt
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* - RTC_IT_SEC: Second interrupt
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* Output : None
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* Return : None
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*******************************************************************************/
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void RTC_ClearITPendingBit(u16 RTC_IT)
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{
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/* Check the parameters */
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assert(IS_RTC_IT(RTC_IT));
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/* Clear the coressponding RTC pending bit */
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RTC->CRL &= (u16)~RTC_IT;
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}
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/******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE****/
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