STM32L010C6Tx的睡眠 按键唤醒和RTC Alarm闹钟唤醒

1、用STM32CubeMx配置RCC时钟，高速时钟采用内部HSI，低速时钟采用外部的LSE

2、配置串口用以打印信息验证，只需要Tx就行。

3、配置RTC模式，个人建议 Data Format 选择 Binary data format

并且选中RTC中断

时钟树如下图：

点击GENERATE CODE生成代码
4、打开工程代码，做一下改动
A、在stm32l0xx_it.c中添加闹钟中断函数

void RTC_Alarm_IRQHandler(void)
{
	HAL_RTC_AlarmIRQHandler(&hrtc);
}

B、在Rtc.c文件中更改void MX_RTC_Init(void)函数

/* RTC init function */
void MX_RTC_Init(void)
{
  RTC_TimeTypeDef sTime = {0};
  RTC_DateTypeDef sDate = {0};
  RTC_AlarmTypeDef sAlarm = {0};

  /**Initialize RTC Only 
  */
  hrtc.Instance = RTC;
  hrtc.Init.HourFormat = RTC_HOURFORMAT_24;
  hrtc.Init.AsynchPrediv = 127;
  hrtc.Init.SynchPrediv = 255;
  hrtc.Init.OutPut = RTC_OUTPUT_DISABLE;
  hrtc.Init.OutPutRemap = RTC_OUTPUT_REMAP_NONE;
  hrtc.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
  hrtc.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
  if (HAL_RTC_Init(&hrtc) != HAL_OK)
  {
    Error_Handler();
  }

  /* USER CODE BEGIN Check_RTC_BKUP */
    if(HAL_RTCEx_BKUPRead(&hrtc, RTC_BKP_DR1) != 0x32F1)
	 {
    	   sTime.Hours = 16;
		  sTime.Minutes = 10;
		  sTime.Seconds = 0;
		  sTime.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
		  sTime.StoreOperation = RTC_STOREOPERATION_RESET;
		  if (HAL_RTC_SetTime(&hrtc, &sTime, RTC_FORMAT_BIN) != HAL_OK)
		  {
		    Error_Handler();
		  }
		  sDate.WeekDay = RTC_WEEKDAY_MONDAY;
		  sDate.Month = RTC_MONTH_SEPTEMBER;
		  sDate.Date = 12;
		  sDate.Year = 19;

		  if (HAL_RTC_SetDate(&hrtc, &sDate, RTC_FORMAT_BIN) != HAL_OK)
		  {
		    Error_Handler();
		  }
		  printf("重新设置RTC时间\r\n");
		  HAL_RTCEx_BKUPWrite(&hrtc,RTC_BKP_DR1,0x32F1);
    }
	__HAL_RTC_WAKEUPTIMER_EXTI_CLEAR_FLAG();
  /* USER CODE END Check_RTC_BKUP */

  /**Initialize RTC and set the Time and Date 
  */
  
  /**Enable the Alarm A 
  */
  sAlarm.AlarmTime.Hours = 19;
  sAlarm.AlarmTime.Minutes = 0;
  sAlarm.AlarmTime.Seconds = 0;
  sAlarm.AlarmTime.SubSeconds = 0;
  sAlarm.AlarmTime.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
  sAlarm.AlarmTime.StoreOperation = RTC_STOREOPERATION_RESET;
  sAlarm.AlarmMask = RTC_ALARMMASK_NONE;
  sAlarm.AlarmSubSecondMask = RTC_ALARMSUBSECONDMASK_ALL;
  sAlarm.AlarmDateWeekDaySel = RTC_ALARMDATEWEEKDAYSEL_DATE;
  sAlarm.AlarmDateWeekDay = 12;
  sAlarm.Alarm = RTC_ALARM_A;
  if (HAL_RTC_SetAlarm_IT(&hrtc, &sAlarm, RTC_FORMAT_BIN) != HAL_OK)
  {
    Error_Handler();
  }
}

C、在main函数中SystemClock_Config();之后添加如下内容

 /* USER CODE BEGIN SysInit */
#if 1
	/* Enable Power Clock */
	  __HAL_RCC_PWR_CLK_ENABLE(); 
	 /* Check and handle if the system was resumed from StandBy mode */ 
	 if(__HAL_PWR_GET_FLAG(PWR_FLAG_SB) != RESET)
	 {
	   __HAL_PWR_CLEAR_FLAG(PWR_FLAG_SB);
	 }
#endif
  /* USER CODE END SysInit */

D、添加进入睡眠模式的代码

void Sys_Standby(void)
{  
	__HAL_RCC_PWR_CLK_ENABLE();	
	 HAL_PWR_EnableBkUpAccess();
	 HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN2);
	 __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);
	 HAL_PWR_EnterSTANDBYMode();
}
void GPIO_ALL_DisEnable(void)
{
    GPIO_InitTypeDef GPIO_InitStruct;
  __HAL_RCC_GPIOA_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();
  __HAL_RCC_GPIOC_CLK_ENABLE();
  __HAL_RCC_GPIOH_CLK_ENABLE();
  GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
  GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Pin = GPIO_PIN_All;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); 
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
  HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
  HAL_GPIO_Init(GPIOH, &GPIO_InitStruct);
//  /* Disable GPIOs clock */
  __HAL_RCC_GPIOA_CLK_DISABLE();
  __HAL_RCC_GPIOB_CLK_DISABLE();
  __HAL_RCC_GPIOC_CLK_DISABLE();
  __HAL_RCC_GPIOH_CLK_DISABLE();
}

到此，配置类的更改已完成，下面就是写实现，
主要的思路就是在进入while(1)之前先做个软件定时器，定时器时间到后，设置闹钟，调用GPIO_ALL_DisEnable();和 Sys_Standby();进入睡眠模式。
计算唤醒的时间，采用Crondtab表达式，具体实现思路请参考https://blog.csdn.net/qq_33901011/article/details/100155334