stm32f103的RTC作为闹钟唤醒单片机待机模式RTC_Alarm.rar

#include "RTC_Alarm.h" //RTC中断配置 static void RTC_NVIC_Config(void) { NVIC_InitTypeDef NVIC_InitStructure; NVIC_InitStructure.NVIC_IRQChannel = RTC_IRQChannel; //RTC全局中断 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3; //先占优先级1位,从优先级3位 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //使能该通道中断 NVIC_Init(&NVIC_InitStructure); //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器 } //RTC闹钟初始化:启动时钟、配置LSI做RTC时钟、设置预分频40000得到1Hz //设置运行时间WORK_TIMES void RTC_Alarm_Configuration(void) { /* Enable PWR and BKP clocks */ RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE); /* Allow access to BKP Domain */ PWR_BackupAccessCmd(ENABLE); /* Reset Backup Domain */ BKP_DeInit(); /* RTC clock source configuration ----------------------------------------*/ /* Enable the LSI OSC */ RCC_LSICmd(ENABLE); /* Wait till LSI is ready */ while(RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET) { } /* Select the RTC Clock Source */ RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI); /* Enable the RTC Clock */ RCC_RTCCLKCmd(ENABLE); /* Wait for RTC registers synchronization */ RTC_WaitForSynchro(); /* Wait until last write operation on RTC registers has finished */ RTC_WaitForLastTask(); /* 使能RTC闹钟中断*/ RTC_ITConfig(RTC_IT_ALR, ENABLE); /* Wait until last write operation on RTC registers has finished */ RTC_WaitForLastTask(); /* Set RTC prescaler: set RTC period to 1sec */ RTC_SetPrescaler(40000); /* Wait until last write operation on RTC registers has finished */ RTC_WaitForLastTask(); //中断配置 RTC_NVIC_Config(); //设置运行WORK_TIMES RTC_SetAlarm(RTC_GetCounter() + WORK_TIMES); RTC_WaitForLastTask(); } //设置闹钟时长并进入待机 //s为中断秒数 void RTC_Enter_StandbyMode(u32 s) { RTC_SetAlarm(RTC_GetCounter() + s); RTC_WaitForLastTask(); // 进入待机模式, 此时所有1.8V域的时钟都关闭,HIS和HSE的振荡器关闭, 电压调节器关闭. // 只有WKUP引脚上升沿,RTC警告事件,NRST引脚的外部复位,IWDG复位. /* Request to enter STANDBY mode (Wake Up flag is cleared in PWR_EnterSTANDBYMode function) */ PWR_EnterSTANDBYMode(); } //中断服务函数 void RTC_IRQHandler(void) { if(RTC_GetITStatus(RTC_IT_ALR)!= RESET)//闹钟中断 { RTC_ClearITPendingBit(RTC_IT_ALR); //清闹钟中断 RTC_Enter_StandbyMode(STANDBY_TIMES);//进入待机 } }