求助，stm32f103,定时器输入捕获

[复制链接]

172|0

手机看帖

扫描二维码
随时随地手机跟帖

电梯直达

楼主

电子学长|

楼主 | 2019-11-17 14:02 | 只看该作者回帖奖励

|倒序浏览 |阅读模式

STM32F103, 定时器, TI, ic, se

求助，stm32定时器输入捕获通道3和通道4该如何配置，这是我参考的例程写的。将里面的通道和中断改为通道1便可以测量，但是通道4和3，测量结果总是乱跳？？？
void TIM_Configure()
{
      TIM_ICInitTypeDef TIM_ICInitngnj;
      TIM_TimeBaseInitTypeDef TIM_TimeBasevfv;
      RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);

      TIM_TimeBasevfv.TIM_ClockDivision=0;
      TIM_TimeBasevfv.TIM_CounterMode=TIM_CounterMode_Up;
      TIM_TimeBasevfv.TIM_Period=0xffff;
      TIM_TimeBasevfv.TIM_Prescaler=71;
      TIM_TimeBaseInit(TIM3,&TIM_TimeBasevfv);


      TIM_ICInitngnj.TIM_Channel=TIM_Channel_4;
      TIM_ICInitngnj.TIM_ICFilter=0x0;
      TIM_ICInitngnj.TIM_ICPolarity=TIM_ICPolarity_Rising;
      TIM_ICInitngnj.TIM_ICPrescaler=TIM_ICPSC_DIV1;
      TIM_ICInitngnj.TIM_ICSelection=TIM_ICSelection_DirectTI;
      TIM_ICInit(TIM3,&TIM_ICInitngnj);



      TIM_SelectInputTrigger(TIM3,TIM_TS_TI1FP1);
      TIM_SelectSlaveMode(TIM3,TIM_SlaveMode_Reset);
      TIM_SelectMasterSlaveMode(TIM3,TIM_MasterSlaveMode_Enable);
      TIM_Cmd(TIM3,ENABLE);
      TIM_ITConfig(TIM3,TIM_IT_CC4,ENABLE);
}

求大神指导？？？

使用特权