STM32 RTC 的AlARM 中断问题

只看该作者 · 2010-10-11 22:49

不能进入STM32 RTC 的AlARM 中断服务程序，请求帮忙，不知道问题出在哪里？
      中断配置如下：void NVIC_Configuration(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;
  /* Configure the NVIC Preemption Priority Bits */
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
  /* Enable the RTC Interrupt*/
  NVIC_InitStructure.NVIC_IRQChannel = RTC_IRQChannel;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
/* Enable the RTCAlarm Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = RTCAlarm_IRQChannel;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}
RTC配置中有：/* Wait for RTC registers synchronization */
  RTC_WaitForSynchro();
  /* Wait until last write operation on RTC registers has finished */
  RTC_WaitForLastTask();

  /* Enable the RTC Alarm */
RTC_ITConfig(RTC_IT_SEC, ENABLE);
RTC_WaitForLastTask();
RTC_SetAlarm(RTC_GetCounter()+ 5);
RTC_WaitForLastTask();
RTC_ITConfig(RTC_IT_ALR, ENABLE);
  /* Wait until last write operation on RTC registers has finished */
  RTC_WaitForLastTask();
中断服务程序：
void RTC_IRQHandler(void)
{
if(RTC_GetITStatus(RTC_IT_SEC) != RESET)
  {
//GPIO_ResetBits(GPIOB, GPIO_Pin_8);
RTC_ClearITPendingBit(RTC_IT_SEC);    //首先必须清中断，否则一直响应中断
SecStatus = OneSec;       //设置标志位，表示现在达到一秒
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
  }
  if(RTC_GetITStatus(RTC_IT_ALR) != RESET)
  {
GPIO_SetBits(GPIOB, GPIO_Pin_9);
RTC_ClearITPendingBit(RTC_IT_ALR);    //首先必须清中断，否则一直响应中断
SecStatus = OneSec;       //设置标志位，表示现在达到一秒
  /*Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
/* Set the RTC Alarm after 5s */
RTC_SetAlarm(RTC_GetCounter()+ 5);
/* Wait until last write operation on RTC registers has finished */
RTC_WaitForLastTask();
}
/* Reset RTC Counter when Time is 23:59:59 */
if(RTC_GetCounter() == 0x00015180)    //15180即为24小时的秒计数
{
   RTC_SetCounter(0x0);
   /* Wait until last write operation on RTC registers has finished */
   RTC_WaitForLastTask();
}
  }
在线仿真，进不去闹铃中断标志的服务程序，就算写在void RTCAlarm_IRQHandler (void) 里面也没有用，
到底是怎么回事呢？手册上说RTC_ALARM 是和EXTI_LINE17级联的，难道是配置的问题么？

只看该作者 · 2010-10-13 11:20

既然都知道是级联的那你还不对EXTI17进行配置吗？
那就像两个开关串联，任何一个不配置使能都不能进入中断。

只看该作者 · 2016-3-18 20:06

12小时的是多少

只看该作者 · 2016-3-21 23:16

这样的老帖也能被楼上的给翻出来了;P 那我就简单地提下楼主的问题吧：是NVIC配置的问题，你把中断配置成了NVIC_PriorityGroup_0，（有0位抢占优先级，4位子优先级），但是你却给你的闹钟中断配置了抢占优先级为2，子优先级为1

1万 · 2016-3-22 11:33

#ifndef __RTC_Alarm_H
#define __RTC_Alarm_H

//外部提供接口
#include "main.h"

//宏定义，单位s，0-4294967295s(71582788.25min)
//运行时间
#define WORK_TIMES 2
//待机时间
#define STANDBY_TIMES 2

extern void RTC_Alarm_Configuration(void);

#endif

-----------------------------------------------------------------------
#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
}
}

只看该作者 · 2016-6-16 14:32

598330983 发表于 2016-3-22 11:33
#ifndef __RTC_Alarm_H
#define __RTC_Alarm_H

能问下你，那个stm32是怎么进行闹钟中断的？怎么设置它的counter值和Alarm值

STM32 RTC 的AlARM 中断问题

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