2019年08月29日 | STM32F429 >> 19. RTC_实时时钟（Code）

配置及读取日期和时间

此工程没有读取亚秒值。

若想让时钟断电后持续计时，则不要使能RTC_Config() 函数中的后备域访问。

bsp_rtc.h

/**

  ******************************************************************************

  * @file    bsp_rtc.h

  * @author  Waao

  * @version V1.0.0

  * @date    17-Feb-2019

  * @brief   This file contains some board support package's definition for the RTC.

  *            

  ******************************************************************************

  * @attention

  *

  * None

*

  ******************************************************************************

  */

#ifndef __BSP_RTC_H_

#define __BSP_RTC_H_

#include "stm32f4xx_rtc.h"

#include

#include

//============== Date values =================

#define YEAR                 19

#define MONTH                2 // RTC_Month_February

#define DATE                 19

#define WEEKDAY              2 // RTC_Weekday_Tuesday

//============================================

//============== Time values =================

#define HOURS                0x00

#define MINUTES              0x00

#define SECONDS              0x00

//============================================

void RTC_Config(void);

void RTC_DateConfig(void);

void RTC_TimeConfig(void);

#endif

bsp_rtc.c

/**

  ******************************************************************************

  * @file    bsp_rtc.c

  * @author  Waao

  * @version V1.0.0

  * @date    17-Feb-2019

  * @brief   This file contains some board support package's functions for the RTC.

  *            

  ******************************************************************************

  * @attention

  *

  * None

*

  ******************************************************************************

  */

#include "bsp_rtc.h"

/**

  * @brief  Initialize the RTC.

  * @param  None  

  * @retval None

  */

void RTC_Config(void)

{

RTC_InitTypeDef RTC_InitStructure;

//RCC_APB1PeriphClockLPModeCmd(RCC_APB1Periph_PWR, ENABLE);

/* If we ENABLE the Backup Access, we can write the RTC, RCC_BDCR, PWR_CSR register. 

* So that we can modify the time values again. But we cannot modify the time values 

* if we disable that, the time values will keep count forever even through we power 

* down the device.

* If you want to make it counter run forever, you can DISABLE that.

*/

PWR_BackupAccessCmd(ENABLE);

RCC_LSEConfig(RCC_LSE_ON);

while(RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET);

RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);

RCC_RTCCLKCmd(ENABLE);

RTC_InitStructure.RTC_HourFormat = RTC_HourFormat_24;

RTC_InitStructure.RTC_AsynchPrediv = 127;

RTC_InitStructure.RTC_SynchPrediv = 255;

RTC_Init(&RTC_InitStructure);

}

/**

  * @brief  Configure the now date.

  * @param  None  

  * @retval None

  */

void RTC_DateConfig(void)

{

RTC_DateTypeDef SetDate_InitStructure; 

// SetDate_InitStructure

SetDate_InitStructure.RTC_Year = YEAR;

SetDate_InitStructure.RTC_Month =MONTH;

SetDate_InitStructure.RTC_WeekDay = WEEKDAY;

SetDate_InitStructure.RTC_Date = DATE;

RTC_SetDate(RTC_Format_BIN, &SetDate_InitStructure);

}

/**

  * @brief  Configure the now time.

  * @param  None  

  * @retval None

  */

void RTC_TimeConfig(void)

{

RTC_TimeTypeDef SetTime_InitStructure;

// SetTime_InitStructure

SetTime_InitStructure.RTC_H12 = RTC_H12_PM;

SetTime_InitStructure.RTC_Hours = HOURS;

SetTime_InitStructure.RTC_Minutes = MINUTES;

SetTime_InitStructure.RTC_Seconds = SECONDS;

RTC_SetTime(RTC_Format_BIN, &SetTime_InitStructure);

}

main.c

/**

  ******************************************************************************

  * @file    main.c

  * @author  Waao

  * @version V1.0.0

  * @date    19-Feb-2019

  * @brief   RTC operation.

  *            

  ******************************************************************************

  * @attention

  *

  * None

*

  ******************************************************************************

  */

#include

#include

#include

/**

 1. @brief  Main

 2. @param  None  

 3. @retval None

  */

int main(void)

{

RTC_DateTypeDef GetDate_InitStructure;

RTC_TimeTypeDef GetTime_InitStructure;

// We can use the print function

USART_GPIO_Config();

USART1_Config();

// We can use the Delay function

SysTick_Init();

RTC_Config();

RTC_DateConfig();

RTC_TimeConfig();

while(1)

{

RTC_GetDate(RTC_Format_BIN, &GetDate_InitStructure);

printf("nToday is 20%d-%d-%d, and the WeekDay is %d", GetDate_InitStructure.RTC_Year, GetDate_InitStructure.RTC_Month, GetDate_InitStructure.RTC_Date, GetDate_InitStructure.RTC_WeekDay);

RTC_GetTime(RTC_Format_BIN, &GetTime_InitStructure);

printf("nThe real time is %0.2d:%0.2d:%0.2d", GetTime_InitStructure.RTC_Hours, GetTime_InitStructure.RTC_Minutes, GetTime_InitStructure.RTC_Seconds);

printf("n");

Delay(100000);

}

}

闹钟

闹钟编程指南：

配置好基本的日期和时间；

开启闹钟中断（NVIC, EXTI）；

配置闹钟中断结构体并使能中断；

编写闹钟中断函数执行代码；

bsp_rtc.h

//================= Alarm ====================

#define RTC_Alarm_Channel    RTC_Alarm_IRQn

#define RTC_Alarm_EXTI_LINE  EXTI_Line17

#define Specified_RTC_Alarm  RTC_Alarm_A

#define Alarm_HOURS          0

#define Alarm_MINUTES        0

#define Alarm_SECONDS        1

//============================================

bsp_rtc.c

/**

  * @brief  Configure the Alarm.

  * @param  None  

  * @retval None

  */

void RTC_AlarmConfig(void)

{

RTC_AlarmTypeDef Alarm_InitStructure;

NVIC_Config();

EXTI_Config();

RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);

RTC_AlarmCmd(Specified_RTC_Alarm, DISABLE);

// Alarm_InitStructure

Alarm_InitStructure.RTC_AlarmTime.RTC_H12 = RTC_H12_PM;

Alarm_InitStructure.RTC_AlarmTime.RTC_Hours = Alarm_HOURS;

Alarm_InitStructure.RTC_AlarmTime.RTC_Minutes = Alarm_MINUTES;

Alarm_InitStructure.RTC_AlarmTime.RTC_Seconds = Alarm_SECONDS;

/* You can dicide which field is invalid.

* For example, if you configure the RTC_AlarmMask_DateWeekDay is invalid, the alarm will 

* trigger each day.

*/

Alarm_InitStructure.RTC_AlarmMask = RTC_AlarmMask_DateWeekDay;

Alarm_InitStructure.RTC_AlarmDateWeekDaySel = RTC_AlarmDateWeekDaySel_WeekDay;

Alarm_InitStructure.RTC_AlarmDateWeekDay = 19;

RTC_SetAlarm(RTC_Format_BIN, Specified_RTC_Alarm, &Alarm_InitStructure);

RTC_ITConfig(RTC_IT_ALRA, ENABLE);

RTC_AlarmCmd(Specified_RTC_Alarm, ENABLE);

  RTC_ClearFlag(RTC_FLAG_ALRAF);

  EXTI_ClearITPendingBit(EXTI_Line17);

}

bsp_exti.c

/**

  * @brief  Configure the NVIC

  * @param  None

  * @retval None

  */

void NVIC_Config(void)

{

NVIC_InitTypeDef NVIC_InitStructure;

//Configure the NVIC to prioritygroup1

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);

//Configure the preemption priority to 1

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;

//Configure the subpriority to 1

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;

//Enable the interrupt channel

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_InitStructure.NVIC_IRQChannel = RTC_Alarm_Channel;

NVIC_Init(&NVIC_InitStructure);

}

/**

  * @brief  Configure the EXTI

  * @param  None

  * @retval None

  */

void EXTI_Config(void)

{

EXTI_InitTypeDef EXTI_InitStructure;

EXTI_InitStructure.EXTI_Line = RTC_Alarm_EXTI_LINE;

EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;

EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;

EXTI_InitStructure.EXTI_LineCmd = ENABLE;

EXTI_Init(&EXTI_InitStructure);

}

stm32f4xx_it.c

/**

  * @brief  This function handles RTC Alarm.

  * @param  None

  * @retval None

  */

void RTC_Alarm_IRQHandler(void)

{

if(RTC_GetITStatus(RTC_IT_ALRA) == SET)

{

LED1_ON;

printf("nAlarm");

}

  RTC_ClearITPendingBit(RTC_IT_ALRA);

  EXTI_ClearITPendingBit(EXTI_Line17);

}

main.c

/**

  ******************************************************************************

  * @file    main.c

  * @author  Waao

  * @version V1.0.0

  * @date    19-Feb-2019

  * @brief   RTC operation.

  *            

  ******************************************************************************

  * @attention

  *

  * None

*

  ******************************************************************************

  */

#include

#include

#include

#include

#include

#include

/**

  * @brief  Main

  * @param  None  

  * @retval None

  */

int main(void)

{

RTC_DateTypeDef GetDate_InitStructure;

RTC_TimeTypeDef GetTime_InitStructure;

// We can use the print function

USART_GPIO_Config();

USART1_Config();

// We can use the Delay function

SysTick_Init();

KEY_GPIO_Config();

LED_GPIO_Config();

RTC_Config();

RTC_DateConfig();

RTC_TimeConfig();

RTC_AlarmConfig();

while(1)

{

RTC_GetDate(RTC_Format_BIN, &GetDate_InitStructure);

printf("nToday is 20%d-%d-%d, and the WeekDay is %d", GetDate_InitStructure.RTC_Year, GetDate_InitStructure.RTC_Month, GetDate_InitStructure.RTC_Date, GetDate_InitStructure.RTC_WeekDay);

RTC_GetTime(RTC_Format_BIN, &GetTime_InitStructure);

printf("nThe real time is %0.2d:%0.2d:%0.2d", GetTime_InitStructure.RTC_Hours, GetTime_InitStructure.RTC_Minutes, GetTime_InitStructure.RTC_Seconds);