HT32F52352 systick

只看该作者 · 2022-5-11 17:36

请问这个 SYSTICK_SRC_STCLK  是指什么时钟源呢？谢谢~

/*********************************************************************************************************//**
  * @brief  Configure the SysTick clock source.
  * @param  SysTick_ClockSource: Specify the SysTick clock source.
  * This parameter can be one of the following values:
  *    @ARG SYSTICK_SRC_STCLK  : External reference clock is selected as SysTick clock source.
  *    @arg SYSTICK_SRC_FCLK : AHB clock is selected as SysTick clock source.
  * @retval  None
  ***********************************************************************************************************/
void SYSTICK_ClockSourceConfig(u32 SysTick_ClockSource)
{
  /* Check the parameters                                                                                  */
  Assert_Param(IS_SYSTICK_CLOCK_SOURCE(SysTick_ClockSource));

  if (SysTick_ClockSource == SYSTICK_SRC_FCLK)
  {
SysTick->CTRL |= SYSTICK_SRC_FCLK;
  }
  else
  {
SysTick->CTRL &= SYSTICK_SRC_STCLK;
  }
}