使用STM32F072 RTC模块每隔1分钟触发一次中断
使用STM32F072 RTC模块中断,这样设置完成后,每一分钟进一次,时钟配置的是外部LSE 32.768kHz,救助大家这个时间是从哪里设置的void RTC_AlarmConfig(void)
{
RTC_TimeTypeDef RTC_TimeStructure;
RTC_AlarmTypeDefRTC_AlarmStructure;
EXTI_InitTypeDefEXTI_InitStructure;
NVIC_InitTypeDefNVIC_InitStructure;
RTC_DateTimeTypeDef RTC_DateTimeStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
PWR_BackupAccessCmd(ENABLE);
/* Clear the Alarm A Pending Bit */
RTC_ClearITPendingBit(RTC_IT_ALRA);
RTC_ITConfig(RTC_IT_ALRA, ENABLE);
RTC_AlarmCmd(RTC_Alarm_A, ENABLE);
/* EXTI configuration */
EXTI_ClearITPendingBit(EXTI_Line17);
EXTI_InitStructure.EXTI_Line = EXTI_Line17;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
/* Enable the RTC Alarm Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = 2;//RTC_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority=1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
voidRTC_IRQHandler(void)
{
RTC_TimeTypeDef RTC_TimeStructure;
RTC_AlarmTypeDefRTC_AlarmStructure;
RTC_DateTimeTypeDef RTC_DateTimeStructure;
USART1_Printf_RTC(); //RTC
if (RTC_GetITStatus(RTC_IT_ALRA) != RESET)
{
RTC_ClearITPendingBit(RTC_IT_ALRA);
RTC_GetDateTime(&RTC_DateTimeStructure);
RTC_SetAlarm(RTC_Format_BIN, RTC_Alarm_A, &RTC_AlarmStructure);
RTC_ITConfig(RTC_IT_ALRA, ENABLE);
/* Enable the alarm */
RTC_AlarmCmd(RTC_Alarm_A, ENABLE);
}
EXTI_ClearITPendingBit(EXTI_Line17);
}
这里有你要的例程 :https://www.stmcu.org.cn/document/detail/index/id-213581
社区也有相关的帖 https://www.stmcu.org.cn/module/forum/thread-615672-1-2.html Tcreat 发表于 2020-8-19 08:42
这里有你要的例程 :https://www.stmcu.org.cn/document/detail/index/id-213581
之前按例程中的方法配置的就不进中断了,没找出来原因
void RTC_AlarmConfig(void)
{
EXTI_InitTypeDef EXTI_InitStructure;
RTC_AlarmTypeDef RTC_AlarmStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RTC_AlarmStructInit(&RTC_AlarmStructure);
/* EXTI configuration */
EXTI_ClearITPendingBit(EXTI_Line17);
EXTI_InitStructure.EXTI_Line = EXTI_Line17;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
/* Enable the RTC Alarm Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = 2;//RTC_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* Set the alarmA Masks */
RTC_AlarmStructure.RTC_AlarmMask = RTC_AlarmMask_All;
RTC_SetAlarm(RTC_Format_BIN, RTC_Alarm_A, &RTC_AlarmStructure);
/* Set AlarmA subseconds and enable SubSec Alarm : generate 8 interripts per Second */
RTC_AlarmSubSecondConfig(RTC_Alarm_A, 0xFF, RTC_AlarmSubSecondMask_SS14_8);
/* Enable AlarmA interrupt */
RTC_ITConfig(RTC_IT_ALRA, ENABLE);
}
void RTC_IRQHandler(void)
{
USART1_Printf_RTC(); //RTC
/* Check on the AlarmA flag and on the number of interrupts per Second (60*8) */
if(RTC_GetITStatus(RTC_IT_ALRA) != RESET)
{
/* ALARM is enabled */
// ALARM_Occured = 1;
/* Clear RTC AlarmA Flags */
RTC_ClearITPendingBit(RTC_IT_ALRA);
}
/* Clear the EXTIL line 17 */
EXTI_ClearITPendingBit(EXTI_Line17);
}
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