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01、rtc.h
#ifndef __RTC_H#define __RTC_H#include "stm32f4xx.h"#include "delay.h"#include "led.h"void Rtc_My_Init(void);void RTC_Alarm_MyA(void);#endif
02、rtc.c
#include "rtc.h"#define BKP 0x2022void Rtc_My_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: 后备寄存器是掉电可保存数据的寄存器PWR_BackupAccessCmd(ENABLE);if(RTC_ReadBackupRegister(RTC_BKP_DR0) != BKP){//3、配置RTC时钟源，使能RTC时钟：RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE); //选择LSE时钟源RCC_RTCCLKCmd(ENABLE);//如果使用LSE，要打开LSE：RCC_LSEConfig(RCC_LSE_ON);//延时1小段时间，等待系统稳定delay_ms(50);RTC_InitStruct.RTC_HourFormat = RTC_HourFormat_24; //24小时制度RTC_InitStruct.RTC_AsynchPrediv = 0x7F; //异步通道分频器 128分频RTC_InitStruct.RTC_SynchPrediv = 0xFF; //同步通道分频器 256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 对于24小时制度，此参数可不写RTC_TimeStruct.RTC_Hours = 13; //时RTC_TimeStruct.RTC_Minutes = 1; //分RTC_TimeStruct.RTC_Seconds = 1; //秒RTC_SetTime(RTC_Format_BIN, &RTC_TimeStruct);RTC_DateStruct.RTC_Year = 21; //年RTC_DateStruct.RTC_Month = 12; //月RTC_DateStruct.RTC_Date = 18; //日RTC_DateStruct.RTC_WeekDay = RTC_Weekday_Saturday; //星期六RTC_SetDate(RTC_Format_BIN, &RTC_DateStruct);RTC_WriteBackupRegister(RTC_BKP_DR0, BKP);}}void RTC_Alarm_MyA(void){RTC_TimeTypeDef RTC_AlarmTime;RTC_AlarmTypeDef RTC_AlarmStruct;EXTI_InitTypeDef EXTI_InitStruct;NVIC_InitTypeDef NVIC_InitStruct;//关闭闹钟：RTC_AlarmCmd(RTC_Alarm_A,DISABLE);RTC_AlarmTime.RTC_H12 = RTC_H12_PM; //下午 对于24小时制度，此参数可不写RTC_AlarmTime.RTC_Hours = 13; //时RTC_AlarmTime.RTC_Minutes = 1; //分RTC_AlarmTime.RTC_Seconds = 45; //秒RTC_AlarmStruct.RTC_AlarmTime = RTC_AlarmTime; // 时间设置RTC_AlarmStruct.RTC_AlarmMask = RTC_AlarmMask_None; // 无掩码位RTC_AlarmStruct.RTC_AlarmDateWeekDaySel = RTC_AlarmDateWeekDaySel_Date; //按日期来响应闹钟RTC_AlarmStruct.RTC_AlarmDateWeekDay = 18; //18号//配置闹钟参数：RTC_SetAlarm(RTC_Format_BIN, RTC_Alarm_A, &RTC_AlarmStruct);//开启闹钟：RTC_AlarmCmd(RTC_Alarm_A, ENABLE);//开启配置闹钟中断：RTC_ITConfig(RTC_IT_ALRA, ENABLE);EXTI_InitStruct.EXTI_Line = EXTI_Line17; //中断线17EXTI_InitStruct.EXTI_Mode = EXTI_Mode_Interrupt; //中断模式EXTI_InitStruct.EXTI_Trigger= EXTI_Trigger_Rising; //上升沿触发EXTI_InitStruct.EXTI_LineCmd= ENABLE; //中断使能//初始化线上中断，设置触发条件等。EXTI_Init(&EXTI_InitStruct);
