求助高手:STM32 使用SysTick作为定时器遇到的问题?

Sunrier

SysTick设置
void SysTick_Config(void)
{
  /* Disable SysTick Counter */
  SysTick_CounterCmd(SysTick_Counter_Disable);
  /* Disable the SysTick Interrupt */
  SysTick_ITConfig(DISABLE);

  /* Configure HCLK clock as SysTick clock source */
  SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK_Div8);
  /* SysTick interrupt each 1000 Hz with HCLK equal to 72MHz */
  //SysTick_SetReload(9000);
   SysTick_SetReload(72000);
  /* Enable the SysTick Interrupt */
  SysTick_ITConfig(ENABLE);
}
 
void SysTickHandler(void)
{
   TimingDelay_Decrement();
}
 
void TimingDelay_Decrement(void)
{
  if (TimingDelay != 0x00)
  {
    TimingDelay--;
  }
}
 
void HALMG_IntPro( unsigned char nTime )  //假设传进来的nTime =100;
{
 SysTick_CounterCmd(SysTick_Counter_Enable);
 
    TimingDelay = nTime;
   while( TimingDelay )
 {
  HALMAG_SPITrackIntProc(); //这个自己定义的函数,可以不管
 }

     /* Disable SysTick Counter */
  SysTick_CounterCmd(SysTick_Counter_Disable); //在程序这设置断点后跟踪发现TimingDelay =100,在while里死循环,没有启用定时器中断,请问哪里出现问题了?

  /* Clear SysTick Counter */
  SysTick_CounterCmd(SysTick_Counter_Clear);
  

}
 
 

安

TimingDelay_Decrement()你应该加在中断中处理，不然TimingDelay 值永远都是100.

yanghappy

看样子 是