定时器TIM1的分频

1万 · 2021-5-5 20:44

用TIM1 的TIM_TRGOSource_Update触发ADC，发现我需要的
TIM_TimeBaseStructure.TIM_Prescaler = 48-1;
  TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
设置不能实现，只有 TIM_TimeBaseStructure.TIM_Period = 50000-1;起作用
void TIM1_Config(void)
{
  TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
  TIM_OCInitTypeDef       TIM_OCInitStructure;

  TIM_DeInit(TIM1);
  TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
  TIM_OCStructInit(&TIM_OCInitStructure);
  //Time base configuration
  TIM_TimeBaseStructure.TIM_Period = 50000-1;
  TIM_TimeBaseStructure.TIM_Prescaler = 48-1;
  TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
  TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

  TIM_SelectOutputTrigger(TIM1, TIM_TRGOSource_Update);
  TIM_Cmd(TIM1, DISABLE);
}