STM32F4 ST官方评估板笔记(11) - 通过RTC Alarm A进行日期时间定时中断

通过RTC Alarm A进行日期时间定时中断

 

①EXTI_InitTypeDef //结构体定义

  NVIC_InitTypeDef

 

void EXTI_ClearITPendingBit(uint32_t EXTI_Line); //清除外部中断17

线：EXTI_Line17

 

void EXTI_Init(EXTI_InitTypeDef* EXTI_InitStruct); //外部中断装载

线：17

模式：中断

触发：上升沿

 

void NVIC_PriorityGroupConfig(uint32_t NVIC_PriorityGroup); //向量分组

 

  *     @arg NVIC_PriorityGroup_0: 0 bits for pre-emption priority

  *                              4 bits for subpriority

  *     @arg NVIC_PriorityGroup_1: 1 bits for pre-emption priority

  *                              3 bits for subpriority

  *     @arg NVIC_PriorityGroup_2: 2 bits for pre-emption priority

  *                              2 bits for subpriority

  *     @arg NVIC_PriorityGroup_3: 3 bits for pre-emption priority

  *                              1 bits for subpriority

  *     @arg NVIC_PriorityGroup_4: 4 bits for pre-emption priority

  *                              0 bits for subpriority

 

void NVIC_Init(NVIC_InitTypeDef* NVIC_InitStruct); //中断向量初始化

频道：RTC_Alarm_IRQn

 

②进行中断时间设定和Alarm的开启

 

RTC_TimeTypeDef //定义一个读，一个写入

RTC_AlarmTypeDef

 

ErrorStatus RTC_AlarmCmd(uint32_t RTC_Alarm, FunctionalState NewState); //Disable,Alarm A

 

  * @param  RTC_Alarm: specifies the alarm to be configured.

  *          This parameter can be any combination of the following values:

  *            @arg RTC_Alarm_A: to select Alarm A

  *            @arg RTC_Alarm_B: to select Alarm B  

  * @param  NewState: new state of the specified alarm.

  *          This parameter can be: ENABLE or DISABLE.

 

void RTC_GetTime(uint32_t RTC_Format, RTC_TimeTypeDef* RTC_TimeStruct); //读时间，BIN制式

 

void RTC_SetAlarm(uint32_t RTC_Format, uint32_t RTC_Alarm, RTC_AlarmTypeDef* RTC_AlarmStruct);

//设定Alarm细节

Format:二进制

 

Alarm:

  * @param  RTC_Alarm: specifies the alarm to be configured.

  *          This parameter can be one of the following values:

  *            @arg RTC_Alarm_A: to select Alarm A√

  *            @arg RTC_Alarm_B: to select Alarm B

 

结构体:

typedef struct

{

  RTC_TimeTypeDef RTC_AlarmTime;     /*!< Specifies the RTC Alarm Time members. */ //双重结构体,用两个.衔接

 

typedef struct

{

  uint8_t RTC_Hours;

  uint8_t RTC_Minutes;

  uint8_t RTC_Seconds;

  uint8_t RTC_H12;

}RTC_TimeTypeDef;

 

  uint32_t RTC_AlarmMask;            /*!< Specifies the RTC Alarm Masks. //屏蔽不需要的参数

                                     This parameter can be a value of @ref RTC_AlarmMask_Definitions */

 

#define RTC_AlarmMask_None                ((uint32_t)0x00000000)

#define RTC_AlarmMask_DateWeekDay         ((uint32_t)0x80000000)√秒定时

#define RTC_AlarmMask_Hours               ((uint32_t)0x00800000)√秒定时

#define RTC_AlarmMask_Minutes             ((uint32_t)0x00008000)√秒定时

#define RTC_AlarmMask_Seconds             ((uint32_t)0x00000080)

#define RTC_AlarmMask_All                 ((uint32_t)0x80808080)

 

  uint32_t RTC_AlarmDateWeekDaySel;  /*!< Specifies the RTC Alarm is on Date or WeekDay. //用星期表示还是日期

                                     This parameter can be a value of @ref RTC_AlarmDateWeekDay_Definitions */

  

#define RTC_AlarmDateWeekDaySel_Date      ((uint32_t)0x00000000)√

#define RTC_AlarmDateWeekDaySel_WeekDay   ((uint32_t)0x40000000)

 

  uint8_t RTC_AlarmDateWeekDay;      /*!< Specifies the RTC Alarm Date/WeekDay.

                                     If the Alarm Date is selected, this parameter

                                     must be set to a value in the 1-31 range.

                                     If the Alarm WeekDay is selected, this

                                     parameter can be a value of @ref RTC_WeekDay_Definitions */

 

#define RTC_Weekday_Monday             ((uint8_t)0x01)

#define RTC_Weekday_Tuesday            ((uint8_t)0x02)

#define RTC_Weekday_Wednesday          ((uint8_t)0x03)

#define RTC_Weekday_Thursday           ((uint8_t)0x04)

#define RTC_Weekday_Friday             ((uint8_t)0x05)

#define RTC_Weekday_Saturday           ((uint8_t)0x06)

#define RTC_Weekday_Sunday             ((uint8_t)0x07)

 

}RTC_AlarmTypeDef;

 

void RTC_ITConfig(uint32_t RTC_IT, FunctionalState NewState); //注册RTC中断

 

  *            @arg RTC_IT_TS:  Time Stamp interrupt mask

  *            @arg RTC_IT_WUT:  WakeUp Timer interrupt mask

  *            @arg RTC_IT_ALRB:  Alarm B interrupt mask

  *            @arg RTC_IT_ALRA:  Alarm A interrupt mask√

  *            @arg RTC_IT_TAMP: Tamper event interrupt mask

 

ErrorStatus RTC_AlarmCmd(uint32_t RTC_Alarm, FunctionalState NewState); //Alarm开启

 

  * @param  RTC_Alarm: specifies the alarm to be configured.

  *          This parameter can be any combination of the following values:

  *            @arg RTC_Alarm_A: to select Alarm A√

  *            @arg RTC_Alarm_B: to select Alarm B  

  * @param  NewState: new state of the specified alarm.

  *          This parameter can be: ENABLE√ or DISABLE.

  * @retval An ErrorStatus enumeration value:

  *          - SUCCESS: RTC Alarm is enabled/disabled

  *          - ERROR: RTC Alarm is not enabled/disabled  

 

void RTC_ClearFlag(uint32_t RTC_FLAG); //清除RTC标记

 

  * @param  RTC_FLAG: specifies the RTC flag to clear.

  *          This parameter can be any combination of the following values:

  *            @arg RTC_FLAG_TAMP1F: Tamper 1 event flag

  *            @arg RTC_FLAG_TSOVF: Time Stamp Overflow flag

  *            @arg RTC_FLAG_TSF: Time Stamp event flag

  *            @arg RTC_FLAG_WUTF: WakeUp Timer flag

  *            @arg RTC_FLAG_ALRBF: Alarm B flag

  *            @arg RTC_FLAG_ALRAF: Alarm A flag√

  *            @arg RTC_FLAG_RSF: Registers Synchronized flag

 

③Alarm A中断服务

 

void RTC_Alarm_IRQHandler(void)

{

if(RTC_GetITStatus(RTC_IT_ALRA)!=RESET)

{

xxxxxxxx        //用户执行代码 EXTI_ClearITPendingBit(EXTI_Line17); //清EXTI_Line17挂起位 RTC_ClearITPendingBit(RTC_IT_ALRA); //清除中断标志

RTC_ClearFlag(RTC_FLAG_ALRAF);

}

}