STM32中RTC实时时钟和闹钟设置详解

主要初始化函数，以及设置闹钟函数，闹钟中断函数

RTC.c

#include "rtc.h"
#include "delay.h"

//更改这个值，时间与日期将重新初始化
#define  BKP    24010


void Rtc_Init(void)
{
	RTC_InitTypeDef		RTC_InitStruct;
	RTC_TimeTypeDef		RTC_TimeStruct;
	RTC_DateTypeDef		RTC_DateStruct;
	
	//1、使能PWR时钟：
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
	
	//2、使能后备寄存器访问。一个断电保存数据的寄存器
	PWR_BackupAccessCmd(ENABLE);
	
	//判断后备寄存器的值
	if(RTC_ReadBackupRegister(RTC_BKP_DR0) != BKP)
	{
		//3、配置RTC时钟源，使能RTC时钟：
		RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
		RCC_RTCCLKCmd(ENABLE);
		//如果使用LSE，要打开LSE：
		RCC_LSEConfig(RCC_LSE_ON);
		
		
		RTC_InitStruct.RTC_HourFormat	= RTC_HourFormat_24;  //24小时制
		RTC_InitStruct.RTC_AsynchPrediv	= 0x7F;  //128分频  异步分频
		RTC_InitStruct.RTC_SynchPrediv	= 0xFF;  //256分频  同步分频
		//4、 初始化RTC(同步/异步分频系数和时钟格式)：
		RTC_Init(&RTC_InitStruct);
		
		RTC_TimeStruct.RTC_H12		= RTC_H12_PM; //下午
		RTC_TimeStruct.RTC_Hours	= 19;//时
		RTC_TimeStruct.RTC_Minutes	= 57;//分
		RTC_TimeStruct.RTC_Seconds  = 00;//秒
		//5、 设置时间：
		RTC_SetTime(RTC_Format_BIN, &RTC_TimeStruct);
		
		RTC_DateStruct.RTC_Year		= 24; 	//年
		RTC_DateStruct.RTC_Month	= 1;	//月
		RTC_DateStruct.RTC_Date		= 3;	//日
		RTC_DateStruct.RTC_WeekDay	= 3;	//星期
		//6、设置日期：
		RTC_SetDate(RTC_Format_BIN, &RTC_DateStruct);
			
		//将值写入后备寄存器
		RTC_WriteBackupRegister(RTC_BKP_DR0,BKP);
	}
}


//闹钟A初始化
void RTC_Alarm_A_Init(void)
{
	RTC_AlarmTypeDef	RTC_AlarmStruct;
	RTC_TimeTypeDef 	RTC_AlarmTimeSet;
	EXTI_InitTypeDef   EXTI_InitStructure;
	NVIC_InitTypeDef   NVIC_InitStructure;	
	

	//关闭闹钟：
	RTC_AlarmCmd(RTC_Alarm_A,DISABLE); 
	
	RTC_AlarmTimeSet.RTC_H12		= RTC_H12_PM; //下午
	RTC_AlarmTimeSet.RTC_Hours		= 16;//时
	RTC_AlarmTimeSet.RTC_Minutes	= 37;//分
	RTC_AlarmTimeSet.RTC_Seconds  	= 15;//秒
	
	
	RTC_AlarmStruct.RTC_AlarmTime	= RTC_AlarmTimeSet;		//闹钟时间设置
	RTC_AlarmStruct.RTC_AlarmMask	= RTC_AlarmMask_None;	//无掩码位 按实际时间响应闹钟
	RTC_AlarmStruct.RTC_AlarmDateWeekDaySel	= RTC_AlarmDateWeekDaySel_Date;//按日期进行响应闹钟
	RTC_AlarmStruct.RTC_AlarmDateWeekDay	= 3;  //3号
	//3、配置闹钟参数：
	RTC_SetAlarm(RTC_Format_BIN, RTC_Alarm_A, &RTC_AlarmStruct);
	

	EXTI_InitStructure.EXTI_Line 	= EXTI_Line17;			//中断/事件线
	EXTI_InitStructure.EXTI_Mode 	= EXTI_Mode_Interrupt;	//中断模式
	EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;  //上升沿触发
	EXTI_InitStructure.EXTI_LineCmd = ENABLE;		//中断线使能
	//配置NVIC
	EXTI_Init(&EXTI_InitStructure);
	
	/* Enable and set EXTI Line0 Interrupt to the lowest priority */
	NVIC_InitStructure.NVIC_IRQChannel 					 = RTC_Alarm_IRQn; //中断通道，中断通道在stm32f4xx.h查找
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x01;  	//抢占优先级
	NVIC_InitStructure.NVIC_IRQChannelSubPriority 		 = 0x01;	//响应优先级
	NVIC_InitStructure.NVIC_IRQChannelCmd 				 = ENABLE;	//通道使能
	NVIC_Init(&NVIC_InitStructure);	
	
	
	//开启配置闹钟中断：
     RTC_ITConfig(RTC_IT_ALRA, ENABLE);	
	//开启闹钟：
	RTC_AlarmCmd(RTC_Alarm_A,ENABLE);
}


//闹钟B初始化
void RTC_Alarm_B_Init(void)
{
	RTC_AlarmTypeDef	RTC_AlarmStruct;
	RTC_TimeTypeDef 	RTC_AlarmTimeSet;
	EXTI_InitTypeDef   EXTI_InitStructure;
	NVIC_InitTypeDef   NVIC_InitStructure;	
	

	//关闭闹钟：
	RTC_AlarmCmd(RTC_Alarm_B,DISABLE); 
	
	RTC_AlarmTimeSet.RTC_H12		= RTC_H12_PM; //下午
	RTC_AlarmTimeSet.RTC_Hours		= 16;//时
	RTC_AlarmTimeSet.RTC_Minutes	= 37;//分
	RTC_AlarmTimeSet.RTC_Seconds  	= 25;//秒
	
	
	RTC_AlarmStruct.RTC_AlarmTime	= RTC_AlarmTimeSet;		//闹钟时间设置
	RTC_AlarmStruct.RTC_AlarmMask	= RTC_AlarmMask_None;	//无掩码位 按实际时间响应闹钟
	RTC_AlarmStruct.RTC_AlarmDateWeekDaySel	= RTC_AlarmDateWeekDaySel_Date;//按日期进行响应闹钟
	RTC_AlarmStruct.RTC_AlarmDateWeekDay	= 3;  //3号
	//3、配置闹钟参数：
	RTC_SetAlarm(RTC_Format_BIN, RTC_Alarm_B, &RTC_AlarmStruct);
	
	
	EXTI_InitStructure.EXTI_Line 	= EXTI_Line17;			//中断/事件线
	EXTI_InitStructure.EXTI_Mode 	= EXTI_Mode_Interrupt;	//中断模式
	EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;  //上升沿触发
	EXTI_InitStructure.EXTI_LineCmd = ENABLE;		//中断线使能
	//配置NVIC
	EXTI_Init(&EXTI_InitStructure);
	
	/* Enable and set EXTI Line0 Interrupt to the lowest priority */
	NVIC_InitStructure.NVIC_IRQChannel 					 = RTC_Alarm_IRQn; //中断通道，中断通道在stm32f4xx.h查找
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x01;  	//抢占优先级
	NVIC_InitStructure.NVIC_IRQChannelSubPriority 		 = 0x01;	//响应优先级
	NVIC_InitStructure.NVIC_IRQChannelCmd 				 = ENABLE;	//通道使能
	NVIC_Init(&NVIC_InitStructure);	
	
	
	//开启配置闹钟中断：
     RTC_ITConfig(RTC_IT_ALRB, ENABLE);	
	//开启闹钟：
	RTC_AlarmCmd(RTC_Alarm_B,ENABLE);

}

void RTC_Alarm_IRQHandler(void)
{
	//判断中断标志位是否置1
	if(EXTI_GetITStatus(EXTI_Line17) == SET)
	{
			if(RTC_GetFlagStatus(RTC_FLAG_ALRAF) == SET)
			{
				GPIO_ResetBits(GPIOF, GPIO_Pin_9);
			
				RTC_ClearFlag(RTC_FLAG_ALRAF);
			}
			
			if(RTC_GetFlagStatus(RTC_FLAG_ALRBF) == SET)
			{
				GPIO_SetBits(GPIOF, GPIO_Pin_9);
			
				RTC_ClearFlag(RTC_FLAG_ALRBF);
			}		
		//清除中断标志位
		EXTI_ClearITPendingBit(EXTI_Line17);	
	}
}

RTC.h

#ifndef __RTC_H
#define __RTC_H

#include "stm32f4xx.h"


void Rtc_Init(void);
void RTC_Alarm_A_Init(void);
void RTC_Alarm_B_Init(void);
void RTC_Alarm_set(uint32_t Alarm_X ,uint32_t IT_ALRX, uint8_t Hours, uint8_t Minutes , uint8_t  Seconds , uint8_t  AlarmDateWeekDay);

#endif

main.c

	
	Rtc_Init();
	
	RTC_Alarm_A_Init();

	RTC_Alarm_B_Init();
	
	
	//设置闹钟时间
	RTC_Alarm_set(RTC_Alarm_A,RTC_IT_ALRA,17,02,5,3);
	

	while(1)
	{
		RTC_GetDate(RTC_Format_BIN, &RTC_DateStruct);
		RTC_GetTime(RTC_Format_BIN, &RTC_TimeStruct);
		
		printf("日期:%d年%d月%d日\r\n",RTC_DateStruct.RTC_Year, RTC_DateStruct.RTC_Month, RTC_DateStruct.RTC_Date);
		printf("时间:%d:%d:%d\r\n",RTC_TimeStruct.RTC_Hours, RTC_TimeStruct.RTC_Minutes, RTC_TimeStruct.RTC_Seconds);
		

作者：Joe_good