Question: stm32 SysTick_Handler() usage-EEWORLD

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I am using stm32f100, and when debugging SysTick_Handler(), I use the following configuration

if (SysTick_Config(SystemCoreClock / 1000))
  {
    /* Capture error */
  while (1);
  } 周期为1ms，

/*******************************************************
**Function: Delay() delay function
**Input: TimeI, TimeI ms;
************************************************************/
void Delay(u32 TimeI)
{
u32 TimeJ;
TimeNum = TimeI;
while(TimeNum);
}
/*******************************************************
**Function: DelayCount() counting function, put it into the tick interrupt to decrement
**Input: None
**********************************************************/
void DelayCount(void)
{
if(TimeNum)TimeNum--;
}

void SysTick_Handler(void)
{
while(TimeNum);
}

Call Delay(10); and find that it keeps getting stuck in while(TimeNum);. When debugging, I see that the TimeNum value keeps decreasing. I really don’t understand. . . .

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