STM32Cube STM32L053配置RTC WAKEUP中断唤醒

Posted 2021-12-30 シ゛甜虾

芯片手册中提到的从停止模式唤醒说明

芯片手册中提到的从待机模式唤醒说明

配置

LL_RTC_InitTypeDef RTC_InitStruct = 0;

LL_RCC_EnableRTC();

NVIC_SetPriority(RTC_IRQn,0);
NVIC_EnableIRQ(RTC_IRQn);

RTC_InitStruct.HourFormat = LL_RTC_HOURFORMAT_24HOUR;
RTC_InitStruct.AsynchPrescaler = 127;
RTC_InitStruct.SynchPrescaler = 255;
LL_RTC_Init(RTC, &RTC_InitStruct);

LL_RTC_WAKEUP_SetClock(RTC, LL_RTC_WAKEUPCLOCK_CKSPRE);
LL_RTC_WAKEUP_SetAutoReload(RTC, 60);

中断唤醒清除中断

void RTC_IRQHandler(void)

  /* USER CODE BEGIN RTC_IRQn 0 */
	INTRTC = 1;
  while(LL_RTC_IsActiveFlag_WUT(RTC))
  
    LL_RTC_ClearFlag_WUT(RTC);
    LL_RCC_MSI_Enable();
    LL_RCC_LSI_Enable();
  
  LL_EXTI_ClearFlag_0_31(LL_EXTI_LINE_20);	
  /* USER CODE END RTC_IRQn 0 */

  /* USER CODE BEGIN RTC_IRQn 1 */

  /* USER CODE END RTC_IRQn 1 */

休眠函数

void stop(void)

    /* 开启PWR时钟 */
  LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_PWR);
  /* 设置中断线 */
	LL_EXTI_ClearFlag_0_31(LL_EXTI_LINE_20);
  LL_EXTI_EnableIT_0_31(LL_EXTI_LINE_20);
  LL_EXTI_EnableRisingTrig_0_31(LL_EXTI_LINE_20);
	
	/* 设置RTC唤醒时间 */
  LL_RTC_DisableWriteProtection(RTC);
  LL_RTC_WAKEUP_Disable(RTC);
  while(!LL_RTC_IsActiveFlag_WUTW(RTC));
  LL_RTC_WAKEUP_SetAutoReload(RTC, 20);
  LL_RTC_WAKEUP_SetClock(RTC, LL_RTC_WAKEUPCLOCK_CKSPRE);
  LL_RTC_EnableIT_WUT(RTC);
  LL_RTC_WAKEUP_Enable(RTC);
  LL_RTC_EnableWriteProtection(RTC);
//power_off();
	LL_PWR_EnableUltraLowPower();
  LL_PWR_SetRegulModeLP(LL_PWR_REGU_LPMODES_LOW_POWER);
	LL_PWR_SetPowerMode(LL_PWR_MODE_STOP);
  LL_LPM_EnableDeepSleep();
	__WFI();
//power_on();