请教一下关于stm32用于外部脉冲计数

只看该作者 · 2010-10-18 14:42

最近想用STM32对脉冲计数
参考了前辈的一些经验
自己却弄不对，惭愧啊
请大侠点拨下
很着急
TIM_TimeBaseStructure.TIM_Period = 0x0400;
TIM_TimeBaseStructure.TIM_Prescaler = 0x00;
TIM_TimeBaseStructure.TIM_ClockDivision = 0x00;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); // Time base configuration
就是设置这些对吗
TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;
TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
TIM_ICInitStructure.TIM_ICFilter = 0x0;
TIM_PWMIConfig(TIM2, &TIM_ICInitStructure);
TIM_ICInit(TIM2, &TIM_ICInitStructure);
TIM_SelectInputTrigger(TIM2, TIM_TS_TI1FP1);
这些也是设置外部输入捕获功能的，为什么有些前辈没有提啊，是不是我理解错了，大家帮忙啊