在做休眠时，采用的是RTC Alarm方式唤醒MCU，但是系统又同时使用了Systick作为时钟基准计数器。
如何避免休眠时被Systick唤醒，但是同时可以让Systick正常运转计数。
求帮忙，谢谢？
void NVIC_Configuration(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;
  /* 2 bits for Preemption Priority and 2 bits for Sub Priority */
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
  NVIC_InitStructure.NVIC_IRQChannel = RTCAlarm_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}
//系统滴答计数器
void SysTick_Configuration(void)
{
  /* Setup SysTick Timer for 1 msec interrupts  */
  if (SysTick_Config(SystemFrequency / 1000))
  { 
    /* Capture error */ 
    while (1);
  }
  /* Set SysTick Priority to 3 */
  NVIC_SetPriority(SysTick_IRQn, 0x0C);
}

main函数主循环如下
  while (1)
  {
    /* Insert 1.5 second delay */
    Delay(1500);
    /* Wait till RTC Second event occurs */
    RTC_ClearFlag(RTC_FLAG_SEC);
    while(RTC_GetFlagStatus(RTC_FLAG_SEC) == RESET);
    /* Alarm in 3 second */
    RTC_SetAlarm(RTC_GetCounter()+ 3);
    /* Wait until last write operation on RTC registers has finished */
    RTC_WaitForLastTask();
    /* Turn off led connected to GPIO_LED Pin9 */
   LED_OFF(GPIO_Pin_10);
    /* Request to enter STOP mode with regulator in low power mode*/
    PWR_EnterSTOPMode(PWR_Regulator_LowPower, PWR_STOPEntry_WFI);
    /* At this stage the system has resumed from STOP mode -------------------*/
    /* Configures system clock after wake-up from STOP: enable HSE, PLL and select 
       PLL as system clock source (HSE and PLL are disabled in STOP mode) */
    SYSCLKConfig_STOP();
  }
//延时函数

void Delay(__IO uint32_t nTime)
{
  TimingDelay = nTime;
  while(TimingDelay != 0){};
}
//中断响应

 void SysTick_Handler(void)
{
  TimingDelay--;
}

 

用systick做时钟计数不好吧，不直接用RTC吗。

楼主在RTC时钟上设置下，选择系统时钟，不用SYSTICK作为时钟。这样系统休眠时，可以让RTC唤醒，而不影响SYSTICK了。这个SYSTICK一般用作嵌入式系统的时钟，用作RTC时钟不合适呢

Systick唤醒的里面判断一下，如果是，那就继续睡眠
不过这方法属于治标不治本了